Article(id=1307086099994665298, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307086088166732376, articleNumber=null, orderNo=null, doi=10.12401/j.nwg.2025137, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1745164800000, receivedDateStr=2025-04-21, revisedDate=1763136000000, revisedDateStr=2025-11-15, acceptedDate=1763136000000, acceptedDateStr=2025-11-15, onlineDate=1789563210724, onlineDateStr=2026-09-16, pubDate=1787155200000, pubDateStr=2026-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789563210724, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789563210724, creator=13701087609, updateTime=1789563210724, updator=13701087609, issue=Issue{id=1307086088166732376, tenantId=1146029695717560320, journalId=1306274195778404443, year='2026', volume='59', issue='4', pageStart='1', pageEnd='386', issueExtLink='null', onlineDate='null', pubDate='1787155200000', pubDateStr='2026-08-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1789563207904, creator='13701087609', updateTime=1789616196824, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307308339885531645, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307086088166732376, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307308339885531646, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307086088166732376, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=214, endPage=230, ext={EN=ArticleExt(id=1307086101496226131, articleId=1307086099994665298, tenantId=1146029695717560320, journalId=1306274195778404443, language=EN, title=Identification and Its Geological Significance of Mesoarchean Monzogranite in the Jussiape Complex of the Gaviao Block, Sao Francisco Craton, Brazil, columnId=null, journalTitle=Northwestern Geology, columnName=null, runingTitle=null, highlight=null, articleAbstract=

The Jussiape Complex developed in Gaviao Block of Sao Francisco Craton is composed by Jussiape Ⅰ granite and Jussiape Ⅱ syenogranite with intrusion ages of 2 121 Ma and 2 052 Ma respectively. In order to determination the intrusive age and petrological characteristics of the Jussiape Complex, and discuss the significance to regional magmatic activity, tectonic setting, and mineralization,petrology,zircon U−Pb isotope chronology, and Lu−Hf isotope studies of the jussiape granite are carried out. Finally, a group of mesoarchean monzogranite intrusions with zircon U−Pb isotopic age of (3108±22) Ma were identified in the jussiape Ⅰ granite. Petrogeochemical date show that, the samples SiO2 content is 72.23%–72.50%, Al2O3 content is 14.68%–15.09%, TiO2 content is 0.24%, Na2O content ranges from 5.29%–5.26%,K2O content is less than 2% with K2O/Na2O value is 0.29, the average value of TFeO+MgO is 2.42%. The samples exhibit depletion in Nb, Ta, P, Ti, Sr, and compatible elements such as Ni and Cr, the Hf−Rb−Ta diagram shows a collision tectonic granite feature; The rare earth element distribution curve shows a relatively gentle right tilt type and the La/Yb ratio is greater than 15, with enrichment of LREE and negative Ce andEu anomalies. Lu−Hf isotope analysis show that the εHf (t) value range from −18.31 to −0.53 and the value of TDM2 is 3 523–4 063 Ma,indicating that the Jussiape monzogranite originated from the recycling of ancient crustal materials and controlled by the Barra do Mendes−Joao Correa lineament which is responding to the magmatic arc activity in the west of the southern part of the Gaviao Block.It is consistent with the subduction and collisional orogeny tectonic background that briefly existed in the southern part of the Gaviao Block during the Mesoarchean. The Barra do Mendes−Joao Correa lineament reactivated during the period of 2.1–1.9 Ga, forming a series of granite bodies such as Jussiape Ⅰ granite,Jussiape Ⅱ syenogranite and Ibitiara granodiorite that spread in a NNW direction.It is the most important structral−magmatic−metallogenetic belt in the region and has potential for IOCG-type deposits.

, authors=Wanwan XI, Tiangang WANG*, Yuhao ZHAO*, Mangting SHEN, Jiandong SUN, Ming XU, Chunyan YAO, authorsList=Wanwan XI, Tiangang WANG, Yuhao ZHAO, Mangting SHEN, Jiandong SUN, Ming XU, Chunyan YAO, authorCompany=null, correspAuthors=Tiangang WANG, Yuhao ZHAO, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Northwestern Geology. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1307086103836647780, articleId=1307086099994665298, tenantId=1146029695717560320, journalId=1306274195778404443, language=CN, title=巴西圣弗朗西斯科克拉通Gaviao地块Jussiape杂岩中太古代二长花岗岩的识别及其地质意义, columnId=1307086089244668506, journalTitle=西北地质, columnName=境外地质矿产调查研究, runingTitle=null, highlight=null, articleAbstract=

Jussiape杂岩是巴西圣弗朗西斯科克拉通Gaviao地块内古元古代重要的岩浆岩单元,被认为由Jussiape Ⅰ花岗岩(2 121 Ma)和Jussiape Ⅱ正长花岗岩(2 052 Ma)构成。为了进一步厘清Jussiape杂岩的侵入时代、查明其岩体特征和对区域岩浆活动、构造背景及成矿的指示意义,笔者对Jussiape花岗岩开展了岩石学、锆石U−Pb同位素年代学和Lu−Hf同位素研究,在Jussiape Ⅰ花岗岩内识别出了一组中太古代的二长花岗岩侵入岩,其锆石U−Pb同位素年龄为(3 108±22) Ma。SiO2含量为72.23%~72.50%,Al2O3含量为14.68%~15.09%,TiO2含量约为0.24%,Na2O含量为5.29%~5.66%,K2O含量小于2%,K2O/Na2O均值为0.29,TFeO+MgO均值为2.42%;具有较为明显的Nb、Ta、P、Ti、Sr负异常,Ni、Cr等相容元素含量很低,Hf−Rb−Ta图解显示其为碰撞大地构造背景下的花岗岩;稀土元素配分曲线为较为平缓的右倾斜型,轻稀土富集,La/Yb值大于15,具Ce、Eu负异常。εHf(t)值为−18.31~−0.53,二阶段模式年龄TDM2为3 523~4 063 Ma。这些地质特征指示Jussiape中太古代的二长花岗岩源于古老地壳物质循环再造,其成岩受区域Barra do Mendes−Joao Correa线状构造控制,是对中太古代Gaviao地块南部西侧岩浆弧活动的响应,与区域中太古代短暂存在的自西向东的俯冲、碰撞造山大地构造背景一致。Barra do Mendes−Joao Correa线状构造在古元古代持续活动,控制或影响了Jussiape Ⅰ花岗岩、Jussiape Ⅱ正长花岗岩和Ibitiara花岗闪长岩的侵位和展布,构成了区内重要的构造−岩浆−成矿带,具有IOCG型矿床(铁氧化物铜−金矿床)成矿潜力,是Gaviao地块内该类型矿床勘查突破的关键区带。

, authors=隰弯弯, 王天刚*, 赵宇浩*, 沈莽庭, 孙建东, 徐鸣, 姚春彦, authorsList=隰弯弯, 王天刚, 赵宇浩, 沈莽庭, 孙建东, 徐鸣, 姚春彦, authorCompany=null, correspAuthors=王天刚, 赵宇浩, authorNote=

隰弯弯(1986−),男,高级工程师,从事矿产勘查工作。E−mail:

, correspAuthorsNote=
王天刚(1983−),男,博士,正高级工程师,从事区域成矿规律研究。E−mail:。
赵宇浩(1989−),男,博士,高级工程师,从事矿产地质调查工作。E−mail:。
, copyrightStatement=版权所有©《西北地质》编辑部 2026, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=1mDAUmkdu5x4zKmZIQ0zzQ==, magXml=MHC9EIyqaOrGuNuuaOlppA==, pdfUrl=null, pdf=8zaim9CHzxxUIKqmZ0jWzQ==, pdfFileSize=4917335, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=Rj5wLUxq5VYMIf46KSxSBg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=HfeYSN6Mv64IxvI8Qx+96Q==, mapNumber=null, fund=null)}, authors=[Author(id=1307086105426289001, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=xww230@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1307086105543729515, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, authorId=1307086105426289001, language=EN, stringName=Wanwan XI, firstName=Wanwan, middleName=null, lastName=XI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=Nanjing Center of China Geological Survey, Nanjing 210016, Jiangsu,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1307086105636004204, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, authorId=1307086105426289001, language=CN, stringName=隰弯弯, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=中国地质调查局南京地质调查中心,江苏 南京 210016, bio={"content":"

隰弯弯(1986−),男,高级工程师,从事矿产勘查工作。E−mail:

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隰弯弯(1986−),男,高级工程师,从事矿产勘查工作。E−mail:

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Precambrian Research, 1996, 78: 151−164., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1307086104134443365, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, xref=null, ext=[AuthorCompanyExt(id=1307086104142831974, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, companyId=1307086104134443365, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Nanjing Center of China Geological Survey, Nanjing 210016, Jiangsu,China), AuthorCompanyExt(id=1307086104155414887, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, companyId=1307086104134443365, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国地质调查局南京地质调查中心,江苏 南京 210016)])], figs=[ArticleFig(id=1307086108421022101, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.1, caption=Schematic geological map showing the limits, marginal fold belts and major structural units of the Sao Francisco Craton, figureFileSmall=wBMed2iBVGPIOZZVAYGT/g==, figureFileBig=Rj5wLUxq5VYMIf46KSxSBg==, tableContent=null), ArticleFig(id=1307086108504908182, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图1, caption=圣弗朗西斯科克拉通地质简图(据Santos Pinto et al.,2012;Cruz et al.,2016;Medeiros et al.,2017), figureFileSmall=wBMed2iBVGPIOZZVAYGT/g==, figureFileBig=Rj5wLUxq5VYMIf46KSxSBg==, tableContent=null), ArticleFig(id=1307086108756566423, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.2, caption=Simplified geological map of the studied area, figureFileSmall=HCf79ra1e6qD68/y1I11SA==, figureFileBig=qeJnYzqr3fg6tG8oIIqJEw==, tableContent=null), ArticleFig(id=1307086108848841112, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图2, caption=研究区地质简图(据Santos Pinto et al.,2012;Cruz et al.,2016;Campos et al.,2021), figureFileSmall=HCf79ra1e6qD68/y1I11SA==, figureFileBig=qeJnYzqr3fg6tG8oIIqJEw==, tableContent=null), ArticleFig(id=1307086108932727193, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.3, caption=The characteristics of Jussiape monzogranite, figureFileSmall=nMH3kqCzO8guY9yvfWHeTg==, figureFileBig=Es7Mldib0S3VhZ8Pw6ySFQ==, tableContent=null), ArticleFig(id=1307086109029196186, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图3, caption=Jussiape二长花岗岩野外露头(a、b)和镜下照片(c、d)

Pl. 斜长石;Kf. 钾长石;Qz. 石英;Bt. 黑云母

, figureFileSmall=nMH3kqCzO8guY9yvfWHeTg==, figureFileBig=Es7Mldib0S3VhZ8Pw6ySFQ==, tableContent=null), ArticleFig(id=1307086109104693659, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.4, caption=(a) Cathodoluminescence images and (b) U−Pb age of zircons from Jussiape monzogranite, figureFileSmall=+8kWZN4zTuCfzS+MlhN/Sg==, figureFileBig=7N0BcTaWuMbQXgVirPtMdQ==, tableContent=null), ArticleFig(id=1307086109184385436, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图4, caption=Jussiape二长花岗岩锆石CL图像(a)及U−Pb年龄(b), figureFileSmall=+8kWZN4zTuCfzS+MlhN/Sg==, figureFileBig=7N0BcTaWuMbQXgVirPtMdQ==, tableContent=null), ArticleFig(id=1307086109268271517, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.5, caption=εHf(t) –t Diagram of Jussiape granite, figureFileSmall=UIddgRAbndoGiJnCsTVykQ==, figureFileBig=SQyQdqDeiV6IBXProPg4bw==, tableContent=null), ArticleFig(id=1307086109360546206, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图5, caption=Jussiape花岗岩εHf(t) –t图解(底图据王欣等,2025), figureFileSmall=UIddgRAbndoGiJnCsTVykQ==, figureFileBig=SQyQdqDeiV6IBXProPg4bw==, tableContent=null), ArticleFig(id=1307086109440237983, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.6, caption=(a) Diagram in terms of K2O−SiO2 and (b) Hf−Rb−Ta of Jussiape monzogranite, figureFileSmall=+gSPkPHsNTfXAW5eOsEKVA==, figureFileBig=PkPBtfjfpmhbO3xSqcZpow==, tableContent=null), ArticleFig(id=1307086109528318368, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图6, caption=Jussiape二长花岗岩K2O−SiO2(a;据Coleman et al., 1975)和Hf−Rb−Ta(b;据Harris et al., 1986)图解, figureFileSmall=+gSPkPHsNTfXAW5eOsEKVA==, figureFileBig=PkPBtfjfpmhbO3xSqcZpow==, tableContent=null), ArticleFig(id=1307086109608010145, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.7, caption=(a) Primitive mantle−normalized trace element patterns and (b) chondrite−normalized REE patterns of Jussiape monzogranite, figureFileSmall=ugzg+dUoioJOuAJe14OiUw==, figureFileBig=7O1ygUsciQdEbBUQbt76KQ==, tableContent=null), ArticleFig(id=1307086109721256354, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图7, caption=Jussiape二长花岗岩微量元素原始地幔标准化蛛网图(a;标准化数值据McDonough, 1989)和稀土元素球粒陨石标准化配分曲线图(b;标准化数值据Boynton, 1984), figureFileSmall=ugzg+dUoioJOuAJe14OiUw==, figureFileBig=7O1ygUsciQdEbBUQbt76KQ==, tableContent=null), ArticleFig(id=1307086109826113955, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Fig.8, caption=Evolution model of the Gaviao Block, figureFileSmall=xaLmgDQRkxyAygYK8pe4YA==, figureFileBig=yti1TMvNYLoCkGC16zSpMg==, tableContent=null), ArticleFig(id=1307086109926777252, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=图8, caption=Gaviao地块岩浆构造时序图(据Medeiros et al.,2017修改), figureFileSmall=xaLmgDQRkxyAygYK8pe4YA==, figureFileBig=yti1TMvNYLoCkGC16zSpMg==, tableContent=null), ArticleFig(id=1307086110010663333, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Tab.1, caption=

Geochronological data for rocks of the studied area

, figureFileSmall=null, figureFileBig=null, tableContent=
岩组名称岩石类型锆石U−Pb年龄(Ma)Nd模式年龄(Ga)εNd(t)参考文献
Sete Voltas花岗片麻岩3 394±223.7−1~−3Santos Pinto et al., 2012
英云闪长岩3 403±5−−Santos Pinto et al., 2012
花岗闪长岩3 243±263.75−3.1Santos Pinto et al., 2012
Boa Vista花岗片麻岩3 353±53.5~3.2−Santos Pinto et al., 2012;Medeiros et al.,2017
Bernada花岗闪长岩3 386±93.5~3.33.7Santos Pinto et al., 2012;Medeiros et al.,2017
Aracatu奥长花岗岩3 325±16−−0.7Santos Pinto et al., 2012
Lagoa do Morro花岗闪长岩3 184±63.6~3.3−Medeiros et al.,2017
Serra do Eixo二长花岗岩3 158±103.290.2Santos Pinto et al., 2012
碱性花岗岩2 524±14~2 656±103.28−3Santos Pinto et al., 2012
Lagoa da Macambira花岗岩3 146±243.34−1.5Santos Pinto et al., 2012
Caraguatai正长岩2 696±53.22~3.5−4~−5.8Santos Pinto et al., 2012
Veredinha二长花岗岩2 113±11−−Cruz et al., 2016
Ibitiara花岗闪长岩2 103±8−−沈莽庭等,2020
Lagoa das Almas花岗闪长岩2 114±24−−Cruz et al., 2016
Humaita花岗闪长岩2 140±92.76−4Cruz et al., 2016
Rio do Paulo花岗岩2 324±62.73−Cruz et al., 2016;Medeiros et al.,2017
Jussiape I花岗岩2 122±2.2−−Cruz et al., 2016
Belo Campo花岗闪长岩2 049±233.28−15.4Cruz et al., 2016
Boquira黑云二长花岗岩2 041±23−−Cruz et al., 2016
Cacule花岗岩2 019±32−−Cruz et al., 2016
Jussiape II正长花岗岩2 052±443.25−10Cruz et al., 2016
Serra da Franga二长花岗岩2 039±22−−Cruz et al., 2016
Iguatemi花岗岩2 058±723.46−13.4Cruz et al., 2016;Medeiros et al.,2017
Mariana花岗岩1 944±143.45−10Cruz et al., 2016
Espirito Santo花岗岩2 023±263.05−11.1Cruz et al., 2016
Gameleira花岗岩1 947±542.6−8.8Cruz et al., 2016
Campo do Meio花岗岩2 012±4−−Cruz et al., 2016
Pirip花岗岩1 871±180−−Cruz et al., 2016
), ArticleFig(id=1307086110128103846, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=表1, caption=

研究区内主要岩石单元年代学数据

, figureFileSmall=null, figureFileBig=null, tableContent=
岩组名称岩石类型锆石U−Pb年龄(Ma)Nd模式年龄(Ga)εNd(t)参考文献
Sete Voltas花岗片麻岩3 394±223.7−1~−3Santos Pinto et al., 2012
英云闪长岩3 403±5−−Santos Pinto et al., 2012
花岗闪长岩3 243±263.75−3.1Santos Pinto et al., 2012
Boa Vista花岗片麻岩3 353±53.5~3.2−Santos Pinto et al., 2012;Medeiros et al.,2017
Bernada花岗闪长岩3 386±93.5~3.33.7Santos Pinto et al., 2012;Medeiros et al.,2017
Aracatu奥长花岗岩3 325±16−−0.7Santos Pinto et al., 2012
Lagoa do Morro花岗闪长岩3 184±63.6~3.3−Medeiros et al.,2017
Serra do Eixo二长花岗岩3 158±103.290.2Santos Pinto et al., 2012
碱性花岗岩2 524±14~2 656±103.28−3Santos Pinto et al., 2012
Lagoa da Macambira花岗岩3 146±243.34−1.5Santos Pinto et al., 2012
Caraguatai正长岩2 696±53.22~3.5−4~−5.8Santos Pinto et al., 2012
Veredinha二长花岗岩2 113±11−−Cruz et al., 2016
Ibitiara花岗闪长岩2 103±8−−沈莽庭等,2020
Lagoa das Almas花岗闪长岩2 114±24−−Cruz et al., 2016
Humaita花岗闪长岩2 140±92.76−4Cruz et al., 2016
Rio do Paulo花岗岩2 324±62.73−Cruz et al., 2016;Medeiros et al.,2017
Jussiape I花岗岩2 122±2.2−−Cruz et al., 2016
Belo Campo花岗闪长岩2 049±233.28−15.4Cruz et al., 2016
Boquira黑云二长花岗岩2 041±23−−Cruz et al., 2016
Cacule花岗岩2 019±32−−Cruz et al., 2016
Jussiape II正长花岗岩2 052±443.25−10Cruz et al., 2016
Serra da Franga二长花岗岩2 039±22−−Cruz et al., 2016
Iguatemi花岗岩2 058±723.46−13.4Cruz et al., 2016;Medeiros et al.,2017
Mariana花岗岩1 944±143.45−10Cruz et al., 2016
Espirito Santo花岗岩2 023±263.05−11.1Cruz et al., 2016
Gameleira花岗岩1 947±542.6−8.8Cruz et al., 2016
Campo do Meio花岗岩2 012±4−−Cruz et al., 2016
Pirip花岗岩1 871±180−−Cruz et al., 2016
), ArticleFig(id=1307086110245544359, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Tab.2, caption=

Result of zircon U−Pb isotope analyses of Jussiape monzogranite

, figureFileSmall=null, figureFileBig=null, tableContent=
点号含量(10−6)Th/U同位素比值 年龄(Ma)
UTh206Pb/238U1σ207Pb/235U1σ207Pb/206Pb1σ 207Pb/206Pb1σ
12331680.720.298 80.004 26.788 90.112 70.164 80.002 12 50522
23181510.480.394 90.005 310.666 80.188 70.195 90.002 32 79319
36672100.310.327 80.003 27.341 30.094 60.162 40.001 82 48119
45622230.400.444 60.005 112.381 00.175 90.202 00.002 22 84218
53322110.640.401 00.005 211.176 30.187 90.202 10.002 32 84419
6370700.190.343 50.004 08.884 70.146 40.187 60.002 22 72120
74103040.740.382 20.003 910.275 20.134 00.195 00.002 22 78518
83131290.410.419 30.005 411.470 60.194 30.198 40.002 32 81319
94181100.260.333 30.004 78.597 20.177 70.187 10.002 42 71721
106623770.570.360 40.004 99.478 60.219 10.190 70.002 62 74822
11633990.160.363 60.003 89.178 20.122 10.183 10.002 02 68118
12137700.510.607 50.008 220.224 80.269 30.241 50.003 03 13019
137471870.250.337 80.003 57.691 10.105 00.165 10.001 92 50919
141321040.790.624 60.007 320.897 20.280 50.242 60.002 73 13718
152261040.460.482 80.006 014.069 10.232 10.211 30.002 42 91619
16149830.560.528 40.007 316.298 20.266 60.223 70.002 53 00718
172821350.480.431 70.005 012.006 10.165 80.201 70.002 32 84018
186265880.940.075 20.000 70.590 10.007 60.056 90.000 648925
193811230.320.350 30.004 08.516 00.122 80.176 30.002 02 61919
20247870.350.372 20.005 210.261 90.174 80.200 00.002 32 82618
212923121.070.482 60.006 514.871 90.243 30.223 50.002 53 00618
226823980.580.302 00.003 16.520 30.090 20.156 60.001 82 41919
233683110.840.432 80.004 912.133 30.195 10.203 30.002 42 85319
245522090.380.375 40.004 09.476 10.133 50.183 10.002 12 68119
252061000.490.474 60.009 013.592 60.288 90.207 70.002 32 88818
2682931.130.376 40.007 19.920 80.239 50.191 20.002 72 75223
271601641.030.565 50.006 317.658 30.244 80.226 50.002 53 02718
281681280.760.627 10.007 520.973 60.299 90.242 60.002 73 13718
291121341.190.545 10.005 417.391 70.225 00.231 40.002 63 06218
30671502.240.526 30.006 916.006 20.247 60.220 60.002 52 98518
315683870.680.425 10.004 49.836 50.139 70.167 80.002 02 53620
322911590.550.467 40.006 712.895 10.243 30.200 10.002 42 82719
33127114551.140.057 80.000 60.879 80.012 50.110 40.001 31 80621
34520970.190.362 10.003 78.835 60.123 10.177 00.002 02 62519
3510242080.200.312 80.003 26.931 60.091 80.160 70.001 82 46319
362821050.370.474 20.007 113.280 30.249 30.203 10.002 32 85119
37217970.450.533 40.006 516.409 60.253 20.223 10.002 53 00318
386791760.260.344 20.003 98.255 60.125 70.174 00.002 02 59619
394962330.470.432 60.005 312.096 70.208 00.202 80.002 42 84919
404472380.530.395 70.004 010.839 40.149 10.198 70.002 32 81519
416078041.320.317 70.003 87.433 30.107 80.169 70.001 92 55519
423501610.460.361 80.003 99.443 60.130 40.189 30.002 22 73619
43109810.740.510 40.008 115.454 00.342 30.219 60.002 82 97820
4442300.720.605 80.008 819.766 60.318 00.236 60.002 83 09819
451431751.230.568 50.005 918.470 80.243 40.235 60.002 63 09118
464402830.640.348 70.004 18.586 30.133 60.178 60.002 12 64019
475323720.700.370 40.004 29.493 10.137 80.185 90.002 12 70618
486062550.420.334 10.003 97.810 10.126 70.169 60.002 02 55320
493182820.890.491 90.005 414.793 70.212 70.218 10.002 52 96718
506302580.410.354 40.004 98.856 30.159 00.181 20.002 12 66419
516061390.230.330 20.005 37.613 40.173 90.167 20.002 1 2 53021
), ArticleFig(id=1307086110350401960, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=表2, caption=

Jussiape二长花岗岩锆石U−Pb同位素测年数据

, figureFileSmall=null, figureFileBig=null, tableContent=
点号含量(10−6)Th/U同位素比值 年龄(Ma)
UTh206Pb/238U1σ207Pb/235U1σ207Pb/206Pb1σ 207Pb/206Pb1σ
12331680.720.298 80.004 26.788 90.112 70.164 80.002 12 50522
23181510.480.394 90.005 310.666 80.188 70.195 90.002 32 79319
36672100.310.327 80.003 27.341 30.094 60.162 40.001 82 48119
45622230.400.444 60.005 112.381 00.175 90.202 00.002 22 84218
53322110.640.401 00.005 211.176 30.187 90.202 10.002 32 84419
6370700.190.343 50.004 08.884 70.146 40.187 60.002 22 72120
74103040.740.382 20.003 910.275 20.134 00.195 00.002 22 78518
83131290.410.419 30.005 411.470 60.194 30.198 40.002 32 81319
94181100.260.333 30.004 78.597 20.177 70.187 10.002 42 71721
106623770.570.360 40.004 99.478 60.219 10.190 70.002 62 74822
11633990.160.363 60.003 89.178 20.122 10.183 10.002 02 68118
12137700.510.607 50.008 220.224 80.269 30.241 50.003 03 13019
137471870.250.337 80.003 57.691 10.105 00.165 10.001 92 50919
141321040.790.624 60.007 320.897 20.280 50.242 60.002 73 13718
152261040.460.482 80.006 014.069 10.232 10.211 30.002 42 91619
16149830.560.528 40.007 316.298 20.266 60.223 70.002 53 00718
172821350.480.431 70.005 012.006 10.165 80.201 70.002 32 84018
186265880.940.075 20.000 70.590 10.007 60.056 90.000 648925
193811230.320.350 30.004 08.516 00.122 80.176 30.002 02 61919
20247870.350.372 20.005 210.261 90.174 80.200 00.002 32 82618
212923121.070.482 60.006 514.871 90.243 30.223 50.002 53 00618
226823980.580.302 00.003 16.520 30.090 20.156 60.001 82 41919
233683110.840.432 80.004 912.133 30.195 10.203 30.002 42 85319
245522090.380.375 40.004 09.476 10.133 50.183 10.002 12 68119
252061000.490.474 60.009 013.592 60.288 90.207 70.002 32 88818
2682931.130.376 40.007 19.920 80.239 50.191 20.002 72 75223
271601641.030.565 50.006 317.658 30.244 80.226 50.002 53 02718
281681280.760.627 10.007 520.973 60.299 90.242 60.002 73 13718
291121341.190.545 10.005 417.391 70.225 00.231 40.002 63 06218
30671502.240.526 30.006 916.006 20.247 60.220 60.002 52 98518
315683870.680.425 10.004 49.836 50.139 70.167 80.002 02 53620
322911590.550.467 40.006 712.895 10.243 30.200 10.002 42 82719
33127114551.140.057 80.000 60.879 80.012 50.110 40.001 31 80621
34520970.190.362 10.003 78.835 60.123 10.177 00.002 02 62519
3510242080.200.312 80.003 26.931 60.091 80.160 70.001 82 46319
362821050.370.474 20.007 113.280 30.249 30.203 10.002 32 85119
37217970.450.533 40.006 516.409 60.253 20.223 10.002 53 00318
386791760.260.344 20.003 98.255 60.125 70.174 00.002 02 59619
394962330.470.432 60.005 312.096 70.208 00.202 80.002 42 84919
404472380.530.395 70.004 010.839 40.149 10.198 70.002 32 81519
416078041.320.317 70.003 87.433 30.107 80.169 70.001 92 55519
423501610.460.361 80.003 99.443 60.130 40.189 30.002 22 73619
43109810.740.510 40.008 115.454 00.342 30.219 60.002 82 97820
4442300.720.605 80.008 819.766 60.318 00.236 60.002 83 09819
451431751.230.568 50.005 918.470 80.243 40.235 60.002 63 09118
464402830.640.348 70.004 18.586 30.133 60.178 60.002 12 64019
475323720.700.370 40.004 29.493 10.137 80.185 90.002 12 70618
486062550.420.334 10.003 97.810 10.126 70.169 60.002 02 55320
493182820.890.491 90.005 414.793 70.212 70.218 10.002 52 96718
506302580.410.354 40.004 98.856 30.159 00.181 20.002 12 66419
516061390.230.330 20.005 37.613 40.173 90.167 20.002 1 2 53021
), ArticleFig(id=1307086110459453865, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Tab.3, caption=

Result of zircon Lu−Hf isotope analyses of Jussiape monzogranite

, figureFileSmall=null, figureFileBig=null, tableContent=
点号年龄(Ma)176Yb/177Hf2σ176Lu/177Hf2σ176Hf/177Hf2σεHf(0)εHf(t)TDM1(Ma)TDM2(Ma)
12 5050.052 7130.000 2740.001 9280.000 0060.280 8380.000 025−68.38−15.513 4293 946
22 7930.031 6480.000 3720.001 2070.000 0130.280 7970.000 021−69.84−9.353 4213 791
32 4810.032 4900.000 2030.001 1730.000 0070.280 8070.000 020−69.49−15.883 4043 950
42 8420.029 7820.000 5200.001 0380.000 0160.280 7870.000 019−70.20−8.273 4193 764
52 8440.029 7470.000 6970.001 1460.000 0270.280 8030.000 020−69.62−7.863 4073 740
62 7210.055 1580.000 3540.002 1160.000 0150.280 8610.000 019−67.58−10.363 4153 798
72 7850.024 6090.000 3110.000 8920.000 0100.280 7800.000 016−70.45−9.543 4163 797
82 8130.036 8190.000 3350.001 3750.000 0110.280 8290.000 019−68.71−8.073 3923 730
92 7170.024 4660.000 1850.000 9020.000 0060.280 7740.000 019−70.66−11.313 4253 852
102 7480.047 1850.000 2300.001 7450.000 0120.280 8460.000 018−68.12−9.613 4033 773
112 6810.036 9110.000 4520.001 2960.000 0200.280 7890.000 016−70.12−12.283 4393 883
123 1300.024 4880.000 4510.000 9180.000 0160.280 7980.000 018−69.82−1.133 3943 554
132 5090.035 8300.001 3110.001 2800.000 0460.280 8170.000 017−69.15−15.103 4013 924
143 1370.022 6310.000 6400.000 7920.000 0210.280 8020.000 016−69.66−0.533 3773 523
152 9160.030 0590.000 2630.001 1160.000 0090.280 8430.000 017−68.22−4.783 3513 609
163 0070.028 5400.000 7190.001 0350.000 0270.280 7900.000 017−70.08−4.423 4153 658
172 8400.024 2720.000 1010.000 8620.000 0040.280 7850.000 013−70.28−8.053 4073 749
192 6190.026 6640.000 4280.000 9510.000 0150.280 8080.000 017−69.45−12.383 3833 842
202 8260.028 1480.000 4960.000 9720.000 0130.280 7870.000 016−70.21−8.523 4143 767
213 0060.038 4950.000 6040.001 3970.000 0280.280 8140.000 019−69.24−4.343 4153 652
222 4190.044 7840.000 8910.001 6620.000 0350.280 8000.000 022−69.74−18.313 4584 050
232 8530.030 4430.000 6230.001 1750.000 0180.280 7410.000 026−71.81−9.923 4933 871
242 6810.028 6590.000 4490.001 0200.000 0160.280 7390.000 021−71.88−13.553 4823 960
252 8880.039 8800.001 1050.001 5170.000 0430.280 7730.000 019−70.69−8.683 4813 823
262 7520.054 5450.000 4280.001 9180.000 0140.280 7870.000 018−70.21−11.963 5003 918
273 0270.025 1090.000 4630.000 9750.000 0170.280 7850.000 028−70.28−4.043 4173 651
283 1370.040 8650.000 2440.001 5930.000 0070.280 8190.000 015−69.06−1.653 4253 591
293 0620.028 4890.002 0670.001 1140.000 0830.280 8010.000 026−69.69−2.973 4073 612
302 9850.024 1110.000 5930.000 9540.000 0230.280 7470.000 023−71.61−6.303 4663 754
322 8270.043 8240.000 3820.001 5380.000 0130.280 7810.000 020−70.42−9.803 4733 845
342 6250.032 9610.000 2140.001 2030.000 0060.280 8230.000 015−68.94−12.183 3863 835
352 4630.030 6920.000 6310.001 0980.000 0230.280 7890.000 015−70.11−16.783 4213 991
362 8510.031 8020.000 2350.001 1220.000 0090.280 8070.000 016−69.49−7.513 4003 725
373 0030.027 6630.000 9510.000 9750.000 0280.280 8090.000 015−69.41−3.713 3843 612
382 5960.027 1590.000 2440.000 9890.000 0100.280 8090.000 015−69.40−12.903 3853 857
392 8490.048 2530.000 6020.001 8240.000 0230.280 8030.000 031−69.65−9.103 4693 819
402 8150.034 9810.000 5310.001 3040.000 0170.280 7960.000 025−69.87−9.053 4313 791
412 5550.030 8290.000 9690.001 1380.000 0340.280 7320.000 025−72.13−16.843 5024 063
422 7360.032 7520.000 4010.001 2700.000 0160.280 8260.000 021−68.81−9.693 3873 769
432 9780.032 8390.000 8520.001 2670.000 0290.280 7660.000 035−70.96−6.443 4693 757
443 0980.023 9410.000 1330.000 9400.000 0050.280 7120.000 038−72.86−4.973 5123 760
453 0910.030 4660.000 1890.001 0910.000 0100.280 8010.000 015−69.71−2.283 4063 593
462 6400.043 3070.000 2460.001 6220.000 0070.280 7770.000 023−70.56−14.233 4863 970
472 7060.027 2330.000 2410.000 9690.000 0060.280 8300.000 015−68.68−9.673 3563 745
482 5530.037 4560.000 7110.001 3810.000 0220.280 7920.000 018−70.01−15.163 4433 961
492 9670.038 3940.000 8350.001 4230.000 0300.280 7720.000 024−70.75−6.793 4753 770
502 6640.034 7260.000 6040.001 2920.000 0210.280 7780.000 022−70.51−13.043 4543 917
512 5300.034 3570.000 3440.001 2220.000 0110.280 7990.000 015−69.78−15.173 4203 944
), ArticleFig(id=1307086110568505770, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=表3, caption=

Jussiape二长花岗岩锆石Lu−Hf同位素分析结果

, figureFileSmall=null, figureFileBig=null, tableContent=
点号年龄(Ma)176Yb/177Hf2σ176Lu/177Hf2σ176Hf/177Hf2σεHf(0)εHf(t)TDM1(Ma)TDM2(Ma)
12 5050.052 7130.000 2740.001 9280.000 0060.280 8380.000 025−68.38−15.513 4293 946
22 7930.031 6480.000 3720.001 2070.000 0130.280 7970.000 021−69.84−9.353 4213 791
32 4810.032 4900.000 2030.001 1730.000 0070.280 8070.000 020−69.49−15.883 4043 950
42 8420.029 7820.000 5200.001 0380.000 0160.280 7870.000 019−70.20−8.273 4193 764
52 8440.029 7470.000 6970.001 1460.000 0270.280 8030.000 020−69.62−7.863 4073 740
62 7210.055 1580.000 3540.002 1160.000 0150.280 8610.000 019−67.58−10.363 4153 798
72 7850.024 6090.000 3110.000 8920.000 0100.280 7800.000 016−70.45−9.543 4163 797
82 8130.036 8190.000 3350.001 3750.000 0110.280 8290.000 019−68.71−8.073 3923 730
92 7170.024 4660.000 1850.000 9020.000 0060.280 7740.000 019−70.66−11.313 4253 852
102 7480.047 1850.000 2300.001 7450.000 0120.280 8460.000 018−68.12−9.613 4033 773
112 6810.036 9110.000 4520.001 2960.000 0200.280 7890.000 016−70.12−12.283 4393 883
123 1300.024 4880.000 4510.000 9180.000 0160.280 7980.000 018−69.82−1.133 3943 554
132 5090.035 8300.001 3110.001 2800.000 0460.280 8170.000 017−69.15−15.103 4013 924
143 1370.022 6310.000 6400.000 7920.000 0210.280 8020.000 016−69.66−0.533 3773 523
152 9160.030 0590.000 2630.001 1160.000 0090.280 8430.000 017−68.22−4.783 3513 609
163 0070.028 5400.000 7190.001 0350.000 0270.280 7900.000 017−70.08−4.423 4153 658
172 8400.024 2720.000 1010.000 8620.000 0040.280 7850.000 013−70.28−8.053 4073 749
192 6190.026 6640.000 4280.000 9510.000 0150.280 8080.000 017−69.45−12.383 3833 842
202 8260.028 1480.000 4960.000 9720.000 0130.280 7870.000 016−70.21−8.523 4143 767
213 0060.038 4950.000 6040.001 3970.000 0280.280 8140.000 019−69.24−4.343 4153 652
222 4190.044 7840.000 8910.001 6620.000 0350.280 8000.000 022−69.74−18.313 4584 050
232 8530.030 4430.000 6230.001 1750.000 0180.280 7410.000 026−71.81−9.923 4933 871
242 6810.028 6590.000 4490.001 0200.000 0160.280 7390.000 021−71.88−13.553 4823 960
252 8880.039 8800.001 1050.001 5170.000 0430.280 7730.000 019−70.69−8.683 4813 823
262 7520.054 5450.000 4280.001 9180.000 0140.280 7870.000 018−70.21−11.963 5003 918
273 0270.025 1090.000 4630.000 9750.000 0170.280 7850.000 028−70.28−4.043 4173 651
283 1370.040 8650.000 2440.001 5930.000 0070.280 8190.000 015−69.06−1.653 4253 591
293 0620.028 4890.002 0670.001 1140.000 0830.280 8010.000 026−69.69−2.973 4073 612
302 9850.024 1110.000 5930.000 9540.000 0230.280 7470.000 023−71.61−6.303 4663 754
322 8270.043 8240.000 3820.001 5380.000 0130.280 7810.000 020−70.42−9.803 4733 845
342 6250.032 9610.000 2140.001 2030.000 0060.280 8230.000 015−68.94−12.183 3863 835
352 4630.030 6920.000 6310.001 0980.000 0230.280 7890.000 015−70.11−16.783 4213 991
362 8510.031 8020.000 2350.001 1220.000 0090.280 8070.000 016−69.49−7.513 4003 725
373 0030.027 6630.000 9510.000 9750.000 0280.280 8090.000 015−69.41−3.713 3843 612
382 5960.027 1590.000 2440.000 9890.000 0100.280 8090.000 015−69.40−12.903 3853 857
392 8490.048 2530.000 6020.001 8240.000 0230.280 8030.000 031−69.65−9.103 4693 819
402 8150.034 9810.000 5310.001 3040.000 0170.280 7960.000 025−69.87−9.053 4313 791
412 5550.030 8290.000 9690.001 1380.000 0340.280 7320.000 025−72.13−16.843 5024 063
422 7360.032 7520.000 4010.001 2700.000 0160.280 8260.000 021−68.81−9.693 3873 769
432 9780.032 8390.000 8520.001 2670.000 0290.280 7660.000 035−70.96−6.443 4693 757
443 0980.023 9410.000 1330.000 9400.000 0050.280 7120.000 038−72.86−4.973 5123 760
453 0910.030 4660.000 1890.001 0910.000 0100.280 8010.000 015−69.71−2.283 4063 593
462 6400.043 3070.000 2460.001 6220.000 0070.280 7770.000 023−70.56−14.233 4863 970
472 7060.027 2330.000 2410.000 9690.000 0060.280 8300.000 015−68.68−9.673 3563 745
482 5530.037 4560.000 7110.001 3810.000 0220.280 7920.000 018−70.01−15.163 4433 961
492 9670.038 3940.000 8350.001 4230.000 0300.280 7720.000 024−70.75−6.793 4753 770
502 6640.034 7260.000 6040.001 2920.000 0210.280 7780.000 022−70.51−13.043 4543 917
512 5300.034 3570.000 3440.001 2220.000 0110.280 7990.000 015−69.78−15.173 4203 944
), ArticleFig(id=1307086110656586155, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Tab.4, caption=

Major trace (%) and rare earth elements (10−6) contents of Jussiape monzogranite

, figureFileSmall=null, figureFileBig=null, tableContent=
类目4200-YQ14200-YQ24200-YQ3 类目4200-YQ14200-YQ24200-YQ3
SiO272.2372.572.39BaO0.030.040.04
TiO20.250.240.24SO30.010.01<0.01
Al2O315.0214.6815.09SrO0.040.050.06
Fe2O32.031.912.06Cr2O3<0.01<0.010.01
MnO0.050.070.04灼失0.890.770.7
MgO0.620.520.73总量100.0399.38100.1
CaO1.641.681.53TFeO1.831.721.85
Na2O5.665.295.35TFeO+MgO2.452.242.58
K2O1.471.541.78TFeO/MgO2.953.312.53
P2O50.090.080.08K2O/Na2O0.260.290.33
K1.161.221.41Ni32.62.7
Ti0.1520.1450.148Pb12.212.512.5
P390380370Rb11911989.4
Ba336403360Re<0.002<0.002<0.002
Be5.045.872.06Sc2.82.82.6
Bi0.040.050.04Se<1<1<1
Cd<0.020.030.02Sr397484523
Co2.83.72.9Ta0.730.610.4
Cr191118Te<0.05<0.05<0.05
Cs2.912.883.38Th10.58.469.52
Ga21.921.621.3Tl0.820.80.7
Ge0.280.370.24U14.0554.42.22
Hf5.45.25.4V191414
In0.0220.0180.016Y59.660.99.4
Nb8.45.95.9Zr218201209
La12819745.5Er4.244.940.84
Ce10113594Tm0.510.60.12
Pr16.729.18.52Yb2.823.090.77
Nd61.110329.4Lu0.370.410.12
Sm8.513.753.45La/Yb45.3963.7559.09
Eu1.832.820.78∑REE346.89518.30187.70
Gd10.4513.752.18LREE317.13480.67181.65
Tb1.361.870.27HREE29.7637.636.05
Dy8.3810.951.45LREE/HREE10.6612.7730.02
Ho1.632.020.3     
), ArticleFig(id=1307086110748860844, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=表4, caption=

Jussiape二长花岗岩主量(%)、微量和稀土元素(10−6)分析结果

, figureFileSmall=null, figureFileBig=null, tableContent=
类目4200-YQ14200-YQ24200-YQ3 类目4200-YQ14200-YQ24200-YQ3
SiO272.2372.572.39BaO0.030.040.04
TiO20.250.240.24SO30.010.01<0.01
Al2O315.0214.6815.09SrO0.040.050.06
Fe2O32.031.912.06Cr2O3<0.01<0.010.01
MnO0.050.070.04灼失0.890.770.7
MgO0.620.520.73总量100.0399.38100.1
CaO1.641.681.53TFeO1.831.721.85
Na2O5.665.295.35TFeO+MgO2.452.242.58
K2O1.471.541.78TFeO/MgO2.953.312.53
P2O50.090.080.08K2O/Na2O0.260.290.33
K1.161.221.41Ni32.62.7
Ti0.1520.1450.148Pb12.212.512.5
P390380370Rb11911989.4
Ba336403360Re<0.002<0.002<0.002
Be5.045.872.06Sc2.82.82.6
Bi0.040.050.04Se<1<1<1
Cd<0.020.030.02Sr397484523
Co2.83.72.9Ta0.730.610.4
Cr191118Te<0.05<0.05<0.05
Cs2.912.883.38Th10.58.469.52
Ga21.921.621.3Tl0.820.80.7
Ge0.280.370.24U14.0554.42.22
Hf5.45.25.4V191414
In0.0220.0180.016Y59.660.99.4
Nb8.45.95.9Zr218201209
La12819745.5Er4.244.940.84
Ce10113594Tm0.510.60.12
Pr16.729.18.52Yb2.823.090.77
Nd61.110329.4Lu0.370.410.12
Sm8.513.753.45La/Yb45.3963.7559.09
Eu1.832.820.78∑REE346.89518.30187.70
Gd10.4513.752.18LREE317.13480.67181.65
Tb1.361.870.27HREE29.7637.636.05
Dy8.3810.951.45LREE/HREE10.6612.7730.02
Ho1.632.020.3     
), ArticleFig(id=1307086110857912749, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=EN, label=Tab.5, caption=

Representative analyses and main magmatic criteria for Jussiape monzogranite and Serra do Eixo Unit

, figureFileSmall=null, figureFileBig=null, tableContent=
岩石特征Jussiape二长花岗岩Serra do Eixo二长花岗岩Serra do Eixo碱性花岗岩
锆石U-Pb年龄(Ma)3 1083 1582 524~2 656
Sm-Nd模式年龄(Ga)−3.293.28
εNd(t)−0.2−3
Lu−Hf模式年龄(Ma)3 351~3 512(一阶),
3 523~4 063(二阶)
−−
εHf(t)−18.31~−0.53−−
SiO272.3772.174
TiO20.240.220.39
Al2O314.9315.611.9
Fe2O3224.7
MnO0.050.030.05
MgO0.620.50.3
CaO1.622.21.1
Na2O5.435.22.4
K2O1.62.15.1
P2O50.080.060.07
灼失0.780.70.57
总量99.9101100
K2O/Na2O0.30.42.12
La123.570115
Ce110136255
Pr18.114−
Nd64.519100
Sm8.66.218
Eu1.81.52.3
Gd8.84.716
Tb1.170.5−
Dy6.92.218
Ho1.30.43.5
Er3.30.99.3
Tm0.40.1−
Yb2.20.87.4
Lu0.30.10.9
∑REE350.87256.4545.4
LREE326.5246.7490.3
HREE24.379.755.1
LREE/HREE13.425.48.9
), ArticleFig(id=1307086110933410222, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307086099994665298, language=CN, label=表5, caption=

Jussiape二长花岗岩与Serra do Eixo杂岩地质特征对比

, figureFileSmall=null, figureFileBig=null, tableContent=
岩石特征Jussiape二长花岗岩Serra do Eixo二长花岗岩Serra do Eixo碱性花岗岩
锆石U-Pb年龄(Ma)3 1083 1582 524~2 656
Sm-Nd模式年龄(Ga)−3.293.28
εNd(t)−0.2−3
Lu−Hf模式年龄(Ma)3 351~3 512(一阶),
3 523~4 063(二阶)
−−
εHf(t)−18.31~−0.53−−
SiO272.3772.174
TiO20.240.220.39
Al2O314.9315.611.9
Fe2O3224.7
MnO0.050.030.05
MgO0.620.50.3
CaO1.622.21.1
Na2O5.435.22.4
K2O1.62.15.1
P2O50.080.060.07
灼失0.780.70.57
总量99.9101100
K2O/Na2O0.30.42.12
La123.570115
Ce110136255
Pr18.114−
Nd64.519100
Sm8.66.218
Eu1.81.52.3
Gd8.84.716
Tb1.170.5−
Dy6.92.218
Ho1.30.43.5
Er3.30.99.3
Tm0.40.1−
Yb2.20.87.4
Lu0.30.10.9
∑REE350.87256.4545.4
LREE326.5246.7490.3
HREE24.379.755.1
LREE/HREE13.425.48.9
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巴西圣弗朗西斯科克拉通Gaviao地块Jussiape杂岩中太古代二长花岗岩的识别及其地质意义
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隰弯弯 , 王天刚 * , 赵宇浩 * , 沈莽庭 , 孙建东 , 徐鸣 , 姚春彦
西北地质 | 境外地质矿产调查研究 2026,59(4): 214-230
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西北地质 |境外地质矿产调查研究 2026 , 59 (4) : 214 -230
巴西圣弗朗西斯科克拉通Gaviao地块Jussiape杂岩中太古代二长花岗岩的识别及其地质意义
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隰弯弯 , 王天刚* , 赵宇浩* , 沈莽庭, 孙建东, 徐鸣, 姚春彦
作者信息
  • 中国地质调查局南京地质调查中心,江苏 南京 210016
通讯作者:
王天刚(1983−),男,博士,正高级工程师,从事区域成矿规律研究。E−mail:。
赵宇浩(1989−),男,博士,高级工程师,从事矿产地质调查工作。E−mail:。
作者简介:

隰弯弯(1986−),男,高级工程师,从事矿产勘查工作。E−mail:

Identification and Its Geological Significance of Mesoarchean Monzogranite in the Jussiape Complex of the Gaviao Block, Sao Francisco Craton, Brazil
Wanwan XI , Tiangang WANG* , Yuhao ZHAO* , Mangting SHEN, Jiandong SUN, Ming XU, Chunyan YAO
Affiliations
  • Nanjing Center of China Geological Survey, Nanjing 210016, Jiangsu,China
出版时间: 2026-08-20 doi: 10.12401/j.nwg.2025137
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Jussiape杂岩是巴西圣弗朗西斯科克拉通Gaviao地块内古元古代重要的岩浆岩单元,被认为由Jussiape Ⅰ花岗岩(2 121 Ma)和Jussiape Ⅱ正长花岗岩(2 052 Ma)构成。为了进一步厘清Jussiape杂岩的侵入时代、查明其岩体特征和对区域岩浆活动、构造背景及成矿的指示意义,笔者对Jussiape花岗岩开展了岩石学、锆石U−Pb同位素年代学和Lu−Hf同位素研究,在Jussiape Ⅰ花岗岩内识别出了一组中太古代的二长花岗岩侵入岩,其锆石U−Pb同位素年龄为(3 108±22) Ma。SiO2含量为72.23%~72.50%,Al2O3含量为14.68%~15.09%,TiO2含量约为0.24%,Na2O含量为5.29%~5.66%,K2O含量小于2%,K2O/Na2O均值为0.29,TFeO+MgO均值为2.42%;具有较为明显的Nb、Ta、P、Ti、Sr负异常,Ni、Cr等相容元素含量很低,Hf−Rb−Ta图解显示其为碰撞大地构造背景下的花岗岩;稀土元素配分曲线为较为平缓的右倾斜型,轻稀土富集,La/Yb值大于15,具Ce、Eu负异常。εHf(t)值为−18.31~−0.53,二阶段模式年龄TDM2为3 523~4 063 Ma。这些地质特征指示Jussiape中太古代的二长花岗岩源于古老地壳物质循环再造,其成岩受区域Barra do Mendes−Joao Correa线状构造控制,是对中太古代Gaviao地块南部西侧岩浆弧活动的响应,与区域中太古代短暂存在的自西向东的俯冲、碰撞造山大地构造背景一致。Barra do Mendes−Joao Correa线状构造在古元古代持续活动,控制或影响了Jussiape Ⅰ花岗岩、Jussiape Ⅱ正长花岗岩和Ibitiara花岗闪长岩的侵位和展布,构成了区内重要的构造−岩浆−成矿带,具有IOCG型矿床(铁氧化物铜−金矿床)成矿潜力,是Gaviao地块内该类型矿床勘查突破的关键区带。

Gaviao地块  /  Jussiape杂岩  /  中太古代  /  Lu−Hf同位素  /  IOCG型矿床

The Jussiape Complex developed in Gaviao Block of Sao Francisco Craton is composed by Jussiape Ⅰ granite and Jussiape Ⅱ syenogranite with intrusion ages of 2 121 Ma and 2 052 Ma respectively. In order to determination the intrusive age and petrological characteristics of the Jussiape Complex, and discuss the significance to regional magmatic activity, tectonic setting, and mineralization,petrology,zircon U−Pb isotope chronology, and Lu−Hf isotope studies of the jussiape granite are carried out. Finally, a group of mesoarchean monzogranite intrusions with zircon U−Pb isotopic age of (3108±22) Ma were identified in the jussiape Ⅰ granite. Petrogeochemical date show that, the samples SiO2 content is 72.23%–72.50%, Al2O3 content is 14.68%–15.09%, TiO2 content is 0.24%, Na2O content ranges from 5.29%–5.26%,K2O content is less than 2% with K2O/Na2O value is 0.29, the average value of TFeO+MgO is 2.42%. The samples exhibit depletion in Nb, Ta, P, Ti, Sr, and compatible elements such as Ni and Cr, the Hf−Rb−Ta diagram shows a collision tectonic granite feature; The rare earth element distribution curve shows a relatively gentle right tilt type and the La/Yb ratio is greater than 15, with enrichment of LREE and negative Ce andEu anomalies. Lu−Hf isotope analysis show that the εHf (t) value range from −18.31 to −0.53 and the value of TDM2 is 3 523–4 063 Ma,indicating that the Jussiape monzogranite originated from the recycling of ancient crustal materials and controlled by the Barra do Mendes−Joao Correa lineament which is responding to the magmatic arc activity in the west of the southern part of the Gaviao Block.It is consistent with the subduction and collisional orogeny tectonic background that briefly existed in the southern part of the Gaviao Block during the Mesoarchean. The Barra do Mendes−Joao Correa lineament reactivated during the period of 2.1–1.9 Ga, forming a series of granite bodies such as Jussiape Ⅰ granite,Jussiape Ⅱ syenogranite and Ibitiara granodiorite that spread in a NNW direction.It is the most important structral−magmatic−metallogenetic belt in the region and has potential for IOCG-type deposits.

Gaviao block  /  Jussiape granite  /  Mesoarchean  /  Lu−Hf isotope  /  IOCG-type deposit
隰弯弯, 王天刚, 赵宇浩, 沈莽庭, 孙建东, 徐鸣, 姚春彦. 巴西圣弗朗西斯科克拉通Gaviao地块Jussiape杂岩中太古代二长花岗岩的识别及其地质意义. 西北地质, 2026 , 59 (4) : 214 -230 . DOI: 10.12401/j.nwg.2025137
Wanwan XI, Tiangang WANG, Yuhao ZHAO, Mangting SHEN, Jiandong SUN, Ming XU, Chunyan YAO. Identification and Its Geological Significance of Mesoarchean Monzogranite in the Jussiape Complex of the Gaviao Block, Sao Francisco Craton, Brazil[J]. Northwestern Geology, 2026 , 59 (4) : 214 -230 . DOI: 10.12401/j.nwg.2025137
南美巴西圣弗朗西斯科克拉通(Sao Francisco Craton)由太古代陆核增生、拼贴形成,其主要形成演化阶段为古太古代至古元古代(Marinho et al.,1992;Noce,1995;Teixeira et al.,1996;Bastos,1998)。Gaviao地块位于圣弗朗西斯科克拉通北部,是克拉通内太古代基底出露面积最大的陆块,也是南美最古老的陆块之一,因此成为研究南美板块原始地壳演化的关键区域(Bastos Lealet al.,1998;Barbosa et al.,2004;Santos Pinto et al.,2012)。
在中国和巴西地质学家联合野外调查中,发现Gaviao地块内Jussiape杂岩是区内重要的火成岩岩组,由Jussiape Ⅰ花岗岩和Jussiape Ⅱ正长花岗岩构成,该杂岩体内后期岩浆活动较为强烈,常见大面积出露的中、基性岩脉,接触带可见绿帘石化和铁锰质矿化。由于区内的金、铁等矿产的形成和分布与该岩浆活动关系密切,因此,对Jussiape杂岩的研究至关重要。笔者通过岩石学、锆石LA−ICP−MS U−Pb定年和Lu−Hf同位素研究,揭示了Jussiape杂岩的侵入时代及岩体特征,为Gaviao地块中太古代—古元古代的地质演化过程提供了年代学、地球化学、同位素等的约束。
巴西圣弗朗西斯科克拉通最早由Almeida(1967,1977)提出,克拉通内古老岩石的锆石U−Pb同位素年龄通常为3.6~1.8 Ga (Barbosa et al.,2004,2013;Santos Pinto et al.,2012,Medeiros et al.,2017),岩石中还发现有大于4.0 Ga 锆石颗粒(Paquette et al.,2015),说明冥古宙可能已存在具一定面积和厚度的岩壳(沈莽庭等,2020)。巴伊亚州的圣弗朗西斯科克拉通基底主要由4个构造单元组成(图1),主要出露在巴伊亚州东部,分别为Itabuna–Salvador–Curaca褶皱构造带、Serrinha地块、Jequie地块和Gaviao地块。这4个构造单元在古元古代的造山活动(2.1~2.0 Ga)中相互碰撞、拼贴,导致了区域地壳的加厚和广泛的高级区域变质作用(Barbosa et al.,2002,2004;Delgado et al.,2003;Santos Pinto et al.,2012)。
Gaviao地块位于Itabuna–Salvador–Curaca褶皱构造带和Jequie地块西侧,呈不规则状南北纵贯巴伊亚州,主要由奥长花岗岩–英云闪长岩–花岗闪长岩(TTG)组合、片麻岩、角闪岩、角闪岩相的英云闪长质和花岗闪长质正片麻岩组成,地块内包含一些南美洲最古老的岩石,年龄为3.6~2.8 Ga(Medeiros et al.,2017),圣弗朗西斯科克拉通内目前发现的一颗最古老的锆石即位于该地块南部(4 096 Ma;Paquette et al.,2015)。本次研究的Jussiape杂岩位于Gaviao地块南部。区内岩石单元主要为:克拉通陆核以古太古代灰色片麻岩、混合岩和TTG岩组(Sete Voltas、Boa Vista、Bernada和Aracatu等)为主;中太古代、新太古代及古元古代花岗岩类侵入其中;新太古代变质火山沉积层序主要分布在陆核东西边缘;区域北侧和西侧覆盖中元古代以来的硅质碎屑岩、碳酸盐岩等沉积盖层(图2)。区内岩石单元年龄主要分为4个时期:古太古代TTG岩组集中在3.4~3.2 Ga,中太古代、新太古代及古元古代花岗岩类主要集中在3.2~3.1 Ga、2.8~2.5 Ga及2.1~1.9 Ga(Santos Pinto et al.,2012;Cruz et al.,2016;Medeiros et al.,2017;Campos et al.,2021;表1,图2)。
Gaviao地块是圣弗朗西斯科克拉通最重要的矿产分布区块之一,地块内矿床成矿时代跨度较大,从古太古代一直持续至早古生代。矿种类型较多,主要有金矿、铬铁矿、铅锌矿、锰矿、铜矿、铁矿、铁钛钒矿、镍矿、铀矿、磷矿、金刚石矿、祖母绿矿、菱镁矿–滑石矿等。地块内成矿作用大致可以分为4期:①太古宙锌–铜–菱镁–滑石–铅锌–铁–锰–钒钛铁成矿作用,这些矿床的成矿作用都发生在圣弗朗西斯科克拉通形成以前;②古元古代金–铬铁–镍–祖母绿成矿作用,这个时期形成的矿床主要有金矿、铬铁矿、镍矿和祖母绿矿,主要矿床形成时代集中在2.2~1.9 Ga,与圣弗朗西斯科克拉通各地块碰撞拼贴构造背景一致,该时期目前已知的金矿床多为造山带型金矿;③中新元古代铀–磷–金刚石成矿作用;④新元古代至早古生代锰–金刚石–金成矿作用,该时期浅成低温热液型金矿床(点)较为普遍(徐鸣等,2017;Campos et al.,2021)。
Jussiape杂岩位于Gaviao地块南部Umburanas-Brumado-Aracatu地区,由Jussiape Ⅰ花岗岩和Jussiape Ⅱ正长花岗岩构成(图2),和其NW的Ibitiara花岗岩是Gaviao地块内代表性同期(2.1~1.9 Ga)花岗岩单元(Cruz et al.,2016;Campos et al.,2021)。杂岩东侧和北侧为中新元古代未变形变质的砂岩盖层,南侧和西侧分别为Gaviao地块的片麻岩、Umburanas花岗岩和Caraguatai正长岩(图2)。Jussiape杂岩周边区域分布许多铜、金矿床( 点) ,并见有次生水晶矿、金刚石砂矿和重晶石矿( 化) 点分布(沈莽庭等,2020)。
本次野外观测的Jussiape岩体露头位于NW端Jussiape Ⅰ花岗岩内,长超过1 km,主要沿河谷及两侧路壁分布,其岩性特征与南部及中部明显不同(斜长石含量明显增多)。样品手标本弱风化,呈深灰–灰白色,结合镜下观察显示岩石为中粗粒半自形粒状结构,块状构造。矿物成分主要为斜长石、钾长石、石英等。斜长石约为40%,钾长石约为20%,均呈自形–半自形板片状、宽板状,长约为2~5 mm,钾长石粒径一般稍大于斜长石。石英含量为25%,呈不规则粒状,粒径多为1~3 mm,石英颗粒均发生碎裂重结晶,表现为形态、粒度各不相同的微、细粒石英集合体。长石边部、裂纹中也多已绢云母化,表现为细小的绢云母集合体,暗色矿物主要为黑云母,呈微细鳞片状,暗色矿物分布具有定向性(图3),定名为二长花岗岩。
为了进一步揭示Jussiape二长花岗岩侵入时代及地球化学特征,对其进行了同位素测年、地球化学分析(锆石测年和Lu−Hf同位素分析样品编号为4200;地球化学样品编号为4200-YQ1,4200-YQ2和4200-YQ3;采样坐标为W −41°33′47.71″,N 13°21′27.75″)
样品锆石的分选、制靶和锆石阴极发光(CL)照相在河北省诚信地质服务有限公司完成。锆石U−Pb 年龄测试在中国地质调查局天津地质调查中心实验室完成,测试仪器为激光剥蚀多接收器电感耦合等离子体质谱仪(LA−MC−ICP MS)。采用中国地质大学刘勇胜博士研发的ICPMSDataCal程序(Liu et al.,2010)和Ludwig(2003)的Isoplot 程序进行数据处理,采用204Pb 校正法或者Anderson(2002)的方法对普通铅进行校正。
锆石Lu–Hf同位素分析在南京大学内生金属矿床成矿机制研究国家重点实验室完成,测试点对应锆石测年分析点。模式年龄的计算以球粒陨石176Hf/177Hf=0.282 772,176Lu/177Hf=0.033 2(Blichert Toft et al.,1997),亏损地幔Hf 模式年龄(TDM1)采用176Hf/177Hf=0.283 25,176Lu/177Hf=0.038 4 计算(Griffin et al.,2000)。εHf(t) 计算采用的176Lu的衰变常数为1.867×10−11a−1(Soderlund et al.,2004),二阶段Hf模式年龄(TDM2)采用平均大陆壳176/177Hf=0.015计算(Griffin et al.,2002),计算有关公式参见吴福元等(2007)。
本次采集的Jussiape二长花岗岩3件样品(4200-YQ1、4200-YQ2、4200-YQ3)在广州澳实分析检测有限公司进行全岩、主微量元素分析测试。
Jussiape二长花岗岩的锆石晶体具一定程度的碎裂,部分晶体形态较好,呈短柱状,长宽比多2∶1左右,一般不超过3∶1,CL图像可见清晰的岩浆振荡环带(图4)。锆石CL图像整体偏暗,稍亮着U、Th含量相对较低,锆石U、Th含量变化范围分别为42×10−6~1 271×10−6和30×10−6~1 455×10−6,U、Th含量变化范围较大(表2)。Th/U值为0.16~2.24,平均为0.62,结合其锆石较好的岩浆环带(何俊等, 2024),显示其为岩浆成因(谢应波等,2024;胡运行等,2025)。
将测得的测年数据利用Isoplot 3.75绘制锆石年龄谐和曲线,数据点18、31和33明显偏离谐和曲线和不一致线,因此将这3个数据予以剔除。剩余的48个数据除少数几个沿着谐和曲线外,大多数偏离谐和曲线,但呈直线排列,拟合形成不一致线,表明该样品的锆石在形成之后遭受了区域变质或热液作用,导致铅丢失;48个数据点拟合的不一致线与谐和曲线的上交点表示锆石形成时的年龄(陈岳龙等,2004;王一丁,2022),其值为(3 108±22) Ma(图4),代表了Jussiape二长花岗岩的形成年龄,为中太古代侵入的岩体。
笔者对Jussiape二长花岗岩51颗锆石进行了原位Lu−Hf 同位素分析,对应U−Pb同位素分析数据剔除18、31和33号异常数据点。锆石的176Hf/177Hf为0.280 712~0.280 861,平均为0.280 795,对应的εHf(t)值为–18.31~–0.53,平均为−9.37,单阶段模式年龄TDM1集中在3 351~3 512 Ma,二阶段模式年龄TDM2集中在3 523~4 063 Ma(表3)。在εHf(t) −t图解中(图5),Jussiape花岗岩落在3.5~4.0 Ga大陆地壳演化线间,位于球粒陨石演化线之下。
Jussiape二长花岗岩3件样品(4200-YQ1、4200-YQ2、4200-YQ3)主微量分析结果(表4)显示,SiO2含量为72.23%~72.50%,Al2O3含量为14.68%~15.09%,K2O含量为1.47%~1.78%,Na2O含量为5.29%~5.66%,K2O/Na2O平均值为0.29。在K2O−SiO2图解(图6a)中,Jussiape二长花岗岩落入中钾钙碱性系列区域。
Jussiape二长花岗岩微量元素中具有较为明显的Nb、Ta、P、Ti、Sr负异常(图7),Ni、Cr等相容元素含量很低(Ni:2.6×10−6~3×10−6,Cr:11×10−6~19×10−6),在Hf−Rb−Ta图解中靠近“碰撞大地构造背景花岗岩”(图6b)。Jussiape二长花岗岩稀土元素总量为187.7×10−6~518.3×10−6,轻重稀土比值LREE/HREE为10.66~30.02,La/Yb值45.39~63.75。在稀土元素球粒陨石标准化配分曲线中(图7),Jussiape二长花岗岩表现为较为平缓的右倾斜型,具有一定的Ce、Eu负异常。
Jussiape杂岩在区域侵入岩单元中研究程度相对较高,前人进行过1∶25000比例尺的地质调查工作,识别出Jussiape Ⅰ花岗岩(锆石U−Pb年龄为2 121 Ma)和Jussiape Ⅱ正长花岗岩(锆石U−Pb年龄为2 052 Ma)两组岩体(Guimaraes et al.,2005;Cruz et al.,2016;表1,图2)。本次研究的Jussiape二长花岗岩的锆石U−Pb同位素测年结果与此前划归的古元古代的两组侵入岩的侵入时代有较大的差异。据文中测年数据,Jussiape二长花岗岩为中太古代时期侵入岩(3 108 Ma)。Jussiape二长花岗岩与南部出露的Serra do Eixo杂岩(由不同时代的二长花岗岩和碱性花岗岩组成;表1,图2)中的二长花岗岩(锆石U−Pb年龄3 158 Ma)同属3.2~3.1 Ga期间侵入的钙碱性花岗质岩体,具有十分相似的主量元素组成,其主量、稀土元素含量及分馏特征等多介于Serra do Eixo二长花岗岩和Serra do Eixo碱性花岗岩之间(Santos Pinto et al.,1998,2012;Barbosa et al.,2002;表1、表5,图2)。
Serra do Eixo二长花岗岩Sm−Nd模式年龄为3.29 Ga,εNd(t)值为0.2,Serra do Eixo碱性花岗岩Sm−Nd模式年龄为3.28 Ga,εNd(t)值为−3。Santos Pinto et al.(2012)研究发现,Serra do Eixo二长花岗岩岩浆来源于古老地壳部分熔融(古太古宙灰色片麻岩部分熔融)或新生地壳熔融混染(含石榴子石角闪岩部分熔融与古老地壳物质混染),Serra do Eixo碱性花岗岩岩浆则来源于古老地壳部分熔融(早期Serra do Eixo花岗片麻岩部分熔融)。Medeiros et al.(2017)年进一步对Gaviao地块南部中太古代岩体进行了综合研究,认为Gaviao地块南部区域东侧岩体Sm−Nd模式年龄多3.69~3.34(如Lagoa do Morro花岗闪长岩;表1,图2),相应的εNd(t)值为−1.5~−5.6,指示了区域古太古代基底在中太古代的循环再造,而Gaviao地块南部区域西侧岩体,以Santa Izabel杂岩(图1)为代表,Sm−Nd模式年龄为3.3~3.1 Ga(锆石U−Pb年龄为3.1~2.9 Ga),相应的εNd(t)值(−1.4、−1.3和0.3)指示了岩浆源区短暂的地壳居留时间和新生地壳熔融混染的特征,而其他εNd(t)值(−4.7)则指示了古老地壳物质的加入。
Jussiape二长花岗岩176Lu/177Hf值除6号测点为0.002 116,其余值均低于0.002,说明锆石在岩体形成之后的演化过程中有较少的放射成因的Hf积累,因此可以用锆石176Lu/177Hf值解释岩体形成时的成因信息。其Hf同位素处在亏损地幔和4.0 Ga地壳演化线之间,位于球粒陨石Hf同位素演化线之下(图5),一、二阶段的Hf模式年龄分别为3 351~3 512 Ma和3 523~4 063 Ma,老于其成岩年龄3 108 Ma,εHf(t)值均为负值(–18.31~–0.53),表明Jussiape二长花岗岩源区以地壳Hf同位素为主导(郑永飞等,2007;彭璇等,2022; 王志强等,2024)。结合Santos Pinto et al.(2012)和Medeiros et al.(2017)的研究成果,认为其岩浆应来源于区域古太古代基底(灰色片麻岩等)循环再造,也可能有更古老的冥古宙残片加入(Paquette et al.,2015;沈莽庭等,2020)。最大的εHf(t)值(−0.53)对应3 377 Ma(锆石颗粒年龄3 137 Ma;表3)一阶模式年龄,参考区域Serra do Eixo二长花岗岩和Santa Izabel杂岩岩浆源区特征(Santos Pinto et al.,2012;Medeiros et al.,2017)认为,Jussiape二长花岗岩源区岩浆可能未经历或经历了极低程度的新生地壳熔融混染。
Gaviao地块陆核主要形成于古太古代,在研究区内以Sete Voltas、Boa Vista、Bernada和Aracatu等TTG单元为代表(图2),其岩石年龄为3.4~3.2 Ga(表1),源自拉斑玄武岩的部分熔融,残留相为含石榴子石的角闪岩或榴辉岩(Bastos Leal et al.,1998)。
Gaviao地块在中太古代继续增生,岩浆活动以新生(镁铁质)地壳熔融混染和古太古代地壳的循环再造为主(图8),研究区内主要岩石单元为Lagoa do Morro、Serra do Eixo和Lagoa da Macambira等(表1,图2)。Medeiros et al.(2017)认为,Gaviao地块南部中太古代新生地壳熔融混染作用主要发生在地块西侧边缘,以Santa Izabel杂岩为典型代表(图1)。因此,Arcanjo et al.,(2005)首次提出Santa Izabel杂岩侵位于一个中太古代自西向东俯冲的岩浆弧中。Medeiros et al.(2017)的研究肯定了这条岩浆弧的存在(3.2~2.9 Ga),并认为Santa Izabel杂岩(结晶年龄为3 091~3 136 Ma),Porteirinha TTG杂岩中变质锆石的年龄(3 146 Ma),Santa Izabel杂岩东侧古太古代岩石单元在中太古代的局部变质重结晶(Sete Voltas和Lagoa do Morro正片麻岩)等显示了该时期存在一个短暂的向东的俯冲、碰撞造山和变质作用(Arcanjo et al.,2005;Medeiros et al.,2017),一条存在于Gaviao地块南部东西两侧的构造活动带也被提出,该构造活动带在西侧呈近SN向穿过Santa Izabel杂岩,在东侧则呈SSE(NNW)向沿Jussiape杂岩东边缘展布(Cruz et al.,2016;Medeiros et al.,2017;图1),在东侧区域,该构造带被命名为Barra do Mendes−Joao Correa线状构造(LBJ)(Campos et al.,2021;图2)。Jussiape二长花岗岩(3 108 Ma)时代与Santa Izabel杂岩一致,Hf−Rb−Ta图解显示其为碰撞大地构造背景下花岗岩,指示了Gaviao地块南部东侧区域对该东向俯冲、碰撞造山活动的直接响应,表明Barra do Mendes−Joao Correa线状构造可能自中太古代即开始活动,为Gaviao地块南部西侧中太古代岩浆弧活动的次级构造,控制或影响了区域岩浆活动。
Gaviao地块地壳在新太古代期间逐渐趋稳,该阶段岩浆活动主要集中在2.8~2.5 Ga(图8),研究区内分布以Caraguatai正长岩和Serra do Eixo碱性花岗岩为代表的非造山岩浆活动单元(Cruz et al.,2012;Santos Pinto et al.,2012;表1,图2)。
古元古代中期,在圣弗朗西斯科克拉通(构造演化时间为2.17~1.90 Ga)与刚果克拉通(构造演化时间为2.15~2.04 Ga)碰撞拼贴的构造背景下,Gaviao地块与其东侧的Jequie地块在2.09 Ga左右碰撞拼贴,导致了区域发生地壳增厚、强烈的变形变质、广泛的壳源岩浆活动及混合岩化等一系列岩浆构造事件(Barbosa et al.,2004)。2 380~2 120 Ma,Jequie地块即相对Gaviao地块开始了西向汇聚运动,导致Gaviao地块南部东边缘发生西向洋壳俯冲;西巴伊亚岩浆弧在地块南部东侧形成并开始活动,Rio do Paulo花岗岩(2 324 Ma)即为该岩浆弧早期活动产物(Cruz et al.,2016;表1,图8)。随着汇聚、碰撞的演化,该岩浆弧控制Gaviao地块南部形成了众多2.1~1.9 Ga花岗岩单元(表1,图2)。
Barra do Mendes−Joao Correa线状构造(LBJ)在西巴伊亚岩浆弧演化期间继续活动,控制了Jussiape Ⅰ花岗岩和Jussiape Ⅱ正长花岗岩的侵位和展布(Santos Pinto et al.,1998,2012;Barbosa et al.,2002,2004,2013;Cruz et al.,2016;Silva et al.,2016)。Jussiape Ⅰ花岗岩(2 122 Ma)和其NNW的Ibitiara岩体(2 103 Ma)均属碰撞前壳源花岗岩单元,二者侵入时代相近,展布方向与Barra do Mendes−Joao Correa线状构造一致(Cruz et al.,2016;沈莽庭等,2020),可能均受Barra do Mendes−Joao Correa线状构造的控制或影响。
Barra do Mendes−Joao Correa线状构造自中太古代开始活动,到古元古代仍为区内重要的构造−岩浆活动带,自中太古代到古元古代,该线状构造经历了长期,多期次的构造、岩浆活动和深部物质循环、混染,为成矿物质聚集提供了有利条件。Gaviao地块内目前发现的第一个IOCG型矿床(铁氧化物铜−金矿床)Lavra Velha小型矿床即位于Ibitiara花岗岩体内,其成矿时代约为2.1 Ga,与区域上古元古代的金成矿期一致(徐鸣等,2017;Campos et al.,2021),该矿床也可能是目前圣弗朗西斯科克拉通内第一个确定的IOCG型矿床,具有非常重要的勘查指示意义。IOCG型矿床通常与区域大规模的交代作用相关,区域上很可能还存在其他尚未发现的同类型矿床,表明圣弗朗西斯科克拉通在古元古代也具有IOCG型矿床的成矿潜力(Campos et al.,2021)。因此,以Jussiape杂岩为代表的这条NNW向构造带构成了Gaviao地块内重要的构造−岩浆−成矿带,首次显示出IOCG型矿床成矿潜力。继续开展Ibitiara花岗岩成矿研究及调查,关注Jussiape Ⅰ花岗岩IOCG型矿床成矿潜力并深入开展研究和调查工作,可能是Gaviao地块内乃至圣弗朗西斯科克拉通内该类型矿床实现勘查突破的有效途径。
(1)Jussiape杂岩包含中太古代侵位的Jussiape二长花岗岩,其锆石LA−ICP MS U−Pb年龄为(3 108±22) Ma,源于古老地壳的循环再造,受Barra do Mendes−Joao Correa线状构造控制,是对中太古代Gaviao地块南部西侧岩浆弧活动的响应,与区域中太古代短暂存在的自西向东的俯冲、碰撞造山大地构造背景一致。
(2)Barra do Mendes−Joao Correa线状构造在古元古代持续活动,构成了区内重要的构造−岩浆−成矿带,首次显示出IOCG型矿床成矿潜力,建议关注Jussiape Ⅰ花岗岩IOCG型矿床成矿潜力并深入开展研究和调查工作。

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doi: 10.12401/j.nwg.2025137
  • 接收时间:2025-04-21
  • 首发时间:2026-09-16
  • 出版时间:2026-08-20
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  • 收稿日期:2025-04-21
  • 修回日期:2025-11-15
  • 录用日期:2025-11-15
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    中国地质调查局南京地质调查中心,江苏 南京 210016

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王天刚(1983−),男,博士,正高级工程师,从事区域成矿规律研究。E−mail:。
赵宇浩(1989−),男,博士,高级工程师,从事矿产地质调查工作。E−mail:。
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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