Article(id=1307087565471903842, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307087507837964779, articleNumber=null, orderNo=null, doi=10.12401/j.nwg.2025077, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1686585600000, receivedDateStr=2023-06-13, revisedDate=1745251200000, revisedDateStr=2025-04-22, acceptedDate=1747152000000, acceptedDateStr=2025-05-14, onlineDate=1789563560121, onlineDateStr=2026-09-16, pubDate=1781884800000, pubDateStr=2026-06-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789563560121, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789563560121, creator=13701087609, updateTime=1789563560121, updator=13701087609, issue=Issue{id=1307087507837964779, tenantId=1146029695717560320, journalId=1306274195778404443, year='2026', volume='59', issue='3', pageStart='1', pageEnd='376', issueExtLink='null', onlineDate='null', pubDate='1781884800000', pubDateStr='2026-06-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789563546379, creator='13701087609', updateTime=1789616219263, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307308434005709553, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307087507837964779, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307308434005709554, tenantId=1146029695717560320, journalId=1306274195778404443, issueId=1307087507837964779, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=165, endPage=181, ext={EN=ArticleExt(id=1307087565643870307, articleId=1307087565471903842, tenantId=1146029695717560320, journalId=1306274195778404443, language=EN, title=Chronology, Geochemical Characteristics and Rock Genesis of Shahongshan Pluton in Beishan Area, Gansu Provice, columnId=null, journalTitle=Northwestern Geology, columnName=null, runingTitle=null, highlight=null, articleAbstract=

The Shahongshan pluton is located at the junction of Gansu Province and Inner Mongolia, which is at the intersection of the North China plate, the Tarim plate and the Kazakhstan plate. In addition, the tectonic magmatic activity is widely distributed. In this paper, the LA-ICP-MS zircon U-Pb dating, petrology, major and trace element analysis were carried out on the rocks of Shahongshan pluton, including granite porphyry and syenogranite, in order to unravel the regional intrusion age, rock genesis and the tectonic evolution of the Beishan orogenic belt. LA-ICP-MS Zircon U-Pb dating show that the weighted average age of the granite porphyry and syenogranite was (294.7±4.0) Ma, and (284.2±4.0) Ma, respectively, indicating that they formed in Early Permian. Petrological geochemical analyses show that granites of the Shahongshan pluton belong to calcium-alkaline to high potassium-calcium alkaline rock series, which are characterized by high silicon (74.79%~76.28%), alkali-rich (6.01%~8.30%), and aluminous (A/CNK=1.40~1.89). The total amount of rare earth elements was high, with enrichment in the light rare earth element (LREE; average 251.60×10−6) and depletion in the heavy rare earth element (HREE; average 45.52×10−6). The standardization curve of chondrite meteorite was significantly right-tilted, the LREE/HREE ratios of 5.35~5.68 and LaN/YbN values of 7.93~9.81, indicating a remarkable fractionation of light and heavy rare earths elements. The samples had obvious negative Eu anomalies. Trace elements are relatively enriched with large ionic lipophilic elements Rb, strong incompatible elements Th, U and high field strength elements Zr and Hf, and significant losses are lost to high field strength elements Ba, Nb, Ti and P. In combination with the regional geological background, The A-type granite, represented by the flesh red granite porphyry, was formed in an extensional environment and has specific petrological, mineralogical and geochemical characteristics. Its magma source is mainly crust-derived material, and may be mixed with a small amount of mantle-derived material. The I-type granites, represented by the flesh red syenogranite, may be related to the crystallization differentiation of mantle-derived magma, the partial melting of metamorphic igneous rocks in the lower crust, or the remelting of crust sediments modified by mantle-derived magma. The formation of the Shahongshan pluton is related to the post-collisional tensile environment and local compressive stress in the Early Permian, and has undergone complex processes of magma ascent, separation and crystallization, assimilation and contamination, and mixing. It is concluded that the tectonic background of Shahongshan pluton is the post-collisional plate rift valley environment.

, authors=Jiawei LI1, Weidong TANG1, Tianhang LIU1, Hanwen YANG1, Jialiang XIAO2, Qiang LI1, Yuan PAN1, authorsList=Jiawei LI, Weidong TANG, Tianhang LIU, Hanwen YANG, Jialiang XIAO, Qiang LI, Yuan PAN, authorCompany=null, correspAuthors=null, 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=1307087567187374194, articleId=1307087565471903842, tenantId=1146029695717560320, journalId=1306274195778404443, language=CN, title=甘肃北山地区沙红山岩体年代学、地球化学特征及岩石成因, columnId=1307087508710380014, journalTitle=西北地质, columnName=中亚成矿域关键矿产研究进展, runingTitle=null, highlight=null, articleAbstract=

甘肃沙红山岩体位于甘蒙交界处,大地构造位置处于华北板块、塔里木板块和哈萨克斯坦板块的交汇地带,构造岩浆活动分布广泛。笔者对沙红山岩体中肉红色花岗斑岩和正长花岗岩开展了LA-ICP-MS锆石U-Pb定年、岩石学和主微量元素分析,分析岩石侵位时代和成因,探讨北山造山带构造演化的历程。沙红山岩体中肉红色花岗斑岩LA-ICP-MS锆石U-Pb加权平均年龄为(294.7±4.0)Ma,肉红色正长花岗岩的加权平均年龄为(284.2±4.0)Ma,为早二叠世。岩石地球化学分析表明,沙红山岩体为钙碱性–高钾钙碱性岩石系列,具高硅(74.79%~76.28%),富碱(6.01%~8.30%)和过铝质(A/CNK=1.40~1.89)特征。稀土元素总量较高,轻稀土总量(平均为251.60×10−6)明显高于重稀土总量(平均为45.52×10−6);球粒陨石标准化曲线明显右倾,轻重稀土比为LREE/HREE=5.35~5.68,LaN/YbN值为7.93~9.81,轻重稀土分馏较为明显;样品的具有明显的Eu负异常。微量元素相对富集大离子亲石元素Rb和强不相容元素Th、U及高场强元素Zr、Hf,显著亏损高场强元素Ba、Nb、Ti、P。结合区域地质背景认为,A型花岗岩以肉红色花岗斑岩为代表,形成于伸展环境,具有特定的岩石学、矿物学和地球化学特征,其岩浆来源主要是壳源物质,可能混有少量幔源物质。I型花岗岩以肉红色正长花岗岩为代表,其成因可能与幔源岩浆的结晶分异、下地壳变质火成岩的部分熔融或幔源岩浆改造的地壳沉积物重熔有关。沙红山岩体的形成与早二叠世的后碰撞拉伸环境及局部挤压应力有关,经历了复杂的岩浆上升、分离结晶、同化混染和混合作用过程。因此,笔者认为沙红山岩体形成的构造背景为后碰撞板内裂谷环境。

, authors=李嘉伟1, 唐卫东1, 刘天航1, 杨瀚文1, 肖佳亮2, 李强1, 潘元1, authorsList=李嘉伟, 唐卫东, 刘天航, 杨瀚文, 肖佳亮, 李强, 潘元, authorCompany=null, correspAuthors=null, authorNote=

李嘉伟(1992−),男,工程师,从事矿产资源调查评价。E−mail:

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李嘉伟(1992−),男,工程师,从事矿产资源调查评价。E−mail:

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李嘉伟(1992−),男,工程师,从事矿产资源调查评价。E−mail:

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Contributions to Mineralogy and Petrology, 1987, 95(4): 407−419., articleTitle=A-type granites: geochemical characteristics, discrimination and petrogenesis, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1307087567439032435, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, xref=1, ext=[AuthorCompanyExt(id=1307087567447421044, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, companyId=1307087567439032435, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1Xi'an Center of Mineral Resources Survey, China Geological Survey, Xi'an 710054, Shaanxi, China), AuthorCompanyExt(id=1307087567460003957, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, companyId=1307087567439032435, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1中国地质调查局西安矿产资源调查中心,陕西 西安 710054)]), AuthorCompany(id=1307087567539695734, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, xref=2, ext=[AuthorCompanyExt(id=1307087567564861559, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, companyId=1307087567539695734, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2School of Earth Science and Rosources, China University of Geosciences (Beijing), Beijing 100083, China), AuthorCompanyExt(id=1307087567577444472, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, companyId=1307087567539695734, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2中国地质大学(北京) 地球科学与资源学院,北京 100083)])], figs=[ArticleFig(id=1307087574237999268, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.1, caption=Geological background map of Shahongshan pluton, figureFileSmall=RRJkGvWMqBLfH+7DQVZyyg==, figureFileBig=9kphzqbpwpvkI1w6sHeazA==, tableContent=null), ArticleFig(id=1307087574317691045, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图1, caption=沙红山区域地质背景图, figureFileSmall=RRJkGvWMqBLfH+7DQVZyyg==, figureFileBig=9kphzqbpwpvkI1w6sHeazA==, tableContent=null), ArticleFig(id=1307087574510629030, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.2, caption=Field outcrop and microscopic photographs of Shahongshan pluton, figureFileSmall=DvwXHbbmaquIPLfSReQdGQ==, figureFileBig=vAjNrpomCjQiNR7gL8o1Ow==, tableContent=null), ArticleFig(id=1307087574573543591, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图2, caption=沙红山岩体野外露头及镜下照片

a. 肉红色花岗斑岩野外露头,野外风化颜色为灰黑色;b. 肉红色花岗斑岩手标本;c. 镜下照片主要有钾长石、斜长石、黑云母的斑晶,基质主要为石英、斜长石等长英质矿物;d. 肉红色正长花岗岩野外露头;e. 肉红色正长花岗岩手标本;f. 镜下照片可见钾长石、斜长石、石英和黑云母等主要矿物;所有显微照片均为正交偏光下;Qtz. 石英;Kfs. 钾长石;Pl. 斜长石;Bi. 黑云母

, figureFileSmall=DvwXHbbmaquIPLfSReQdGQ==, figureFileBig=vAjNrpomCjQiNR7gL8o1Ow==, tableContent=null), ArticleFig(id=1307087574644846760, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.3, caption=(a, b) Zircon CL image of Shahongshan rock mass and (c, d) zircon U-Pb age harmonic diagram, figureFileSmall=dwmXoOT6zLDCORAcemzDzA==, figureFileBig=qwH6Qk2WPi9Wv5Qv4n9i0g==, tableContent=null), ArticleFig(id=1307087574720344233, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图3, caption=沙红山岩体的锆石CL图像(a、b)和锆石U-Pb年龄谐和图(c、d), figureFileSmall=dwmXoOT6zLDCORAcemzDzA==, figureFileBig=qwH6Qk2WPi9Wv5Qv4n9i0g==, tableContent=null), ArticleFig(id=1307087574795841706, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.4, caption=(a) Illustration of Shahongshan pluton TAS, (b) diagram of A/CNK-A/NK, (c) K2O-SiO2 diagram of subbasic volcanic rock classification, (d) illustration of classification of mafic granite, figureFileSmall=EE2LSvPesIX3XUYNW08K+g==, figureFileBig=BIiSlA7jc+BQOgjs2RDDqA==, tableContent=null), ArticleFig(id=1307087574879727787, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图4, caption=沙红山岩体TAS图解(a,据Middlemost,1994)、A/CNK-A/NK图解(b,据Maniar et al.,1989)、亚碱性火山岩分类K2O-SiO2图解(c,据Peccerillo et al., 1976)、镁铁质花岗岩分类图解(d,据Frost et al.,2001), figureFileSmall=EE2LSvPesIX3XUYNW08K+g==, figureFileBig=BIiSlA7jc+BQOgjs2RDDqA==, tableContent=null), ArticleFig(id=1307087574967808172, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.5, caption=(a) Standardized diagram of rare earth elements of Shahongshan pluton, and (b) standardized map of trace element, figureFileSmall=nYp6ZtKFzWTyTz73+d7gPQ==, figureFileBig=XjmtKv0leReashX+7I34XA==, tableContent=null), ArticleFig(id=1307087575039111341, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图5, caption=沙红山岩体微量元素原始地幔标准化图(a,据Taylor et al., 1985)、球类陨石标准化稀土元素配分曲线(b,据Sun et al., 1989), figureFileSmall=nYp6ZtKFzWTyTz73+d7gPQ==, figureFileBig=XjmtKv0leReashX+7I34XA==, tableContent=null), ArticleFig(id=1307087575106220206, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.6, caption=Classification diagram of granite of Shahongshan pluton, figureFileSmall=bySGcggkVX5FEOgqbQTTpw==, figureFileBig=eb2X3CXENZdAji06/iImQQ==, tableContent=null), ArticleFig(id=1307087575169134767, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图6, caption=沙红山岩体花岗岩分类图解(底图据Eby, 1990, 1992), figureFileSmall=bySGcggkVX5FEOgqbQTTpw==, figureFileBig=eb2X3CXENZdAji06/iImQQ==, tableContent=null), ArticleFig(id=1307087575240437936, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Fig.7, caption=Illustration of the tectonic environment of Shahongshan pluton, figureFileSmall=DusG13Hpj5ZcxRNXNKFmbA==, figureFileBig=Jy9ZqU19SfeYigneefPCUQ==, tableContent=null), ArticleFig(id=1307087575324324017, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=图7, caption=沙红山岩体构造环境判别图解(据Pearce et al., 1984)

syn-COLG. 同碰撞型;VAG. 火山弧型;WPG. 板内型;ORG. 洋中脊型;post-COLG. 后碰撞型

, figureFileSmall=DusG13Hpj5ZcxRNXNKFmbA==, figureFileBig=Jy9ZqU19SfeYigneefPCUQ==, tableContent=null), ArticleFig(id=1307087575420793010, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Tab.1, caption=

Shahongshan red granite porphyry LA-ICP MS Zircon U-Pb age test results

, figureFileSmall=null, figureFileBig=null, tableContent=
测点含量(10−6)Th/U同位素原子比率同位素年龄(Ma)
ThU207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ
113SH030881060.840.05600.002220.360.013330.04700.00091450.185.42313.89.93296.05.59
114SH03156800.710.05570.002350.360.014130.04690.00093441.090.86311.910.55295.25.71
117SH0341531580.960.05760.001700.350.009370.04460.00080512.964.01307.37.03281.04.94
119SH036911580.580.05480.001640.350.009360.04600.00082402.864.99302.37.06289.65.08
123SH0371051730.610.05290.001640.330.009340.04560.00082322.968.87291.57.12287.75.08
124SH0381411570.900.05400.001800.340.010510.04630.00086371.773.18300.97.93291.95.28
125SH03928460.610.05700.002740.370.016690.04690.00099491.2103.17318.512.38295.36.08
126SH040641030.620.05490.001930.340.011140.04560.00086407.976.21300.88.41287.15.30
127SH04157760.760.05420.002230.350.013470.04680.00092379.989.4304.910.13295.15.67
128SH0421151350.850.05540.001760.350.010130.04610.00085426.268.96305.97.61290.25.22
129SH0431442350.610.05580.001630.380.010070.04990.00090445.763.39330.57.39314.25.51
130SH0441011610.630.05360.001730.360.010460.04810.00088355.770.98309.07.83302.75.42
131SH04568720.950.05320.002080.350.012820.04810.00093338.585.96306.99.62302.65.74
132SH04639630.620.05210.002220.330.013370.04630.00090289.294.52291.910.18292.05.57
134SH0481001570.630.05510.001760.360.010380.04670.00086416.569.37308.87.77294.45.27
140SH049761070.710.05410.001990.350.012040.04740.00091374.780.37307.79.03298.35.59
141SH0501472320.630.05500.001670.370.010060.04820.00088411.165.69316.77.48303.55.41
), ArticleFig(id=1307087575504679091, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=表1, caption=

沙红山肉红色花岗斑岩LA-ICP MS锆石U-Pb年龄测试结果

, figureFileSmall=null, figureFileBig=null, tableContent=
测点含量(10−6)Th/U同位素原子比率同位素年龄(Ma)
ThU207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ
113SH030881060.840.05600.002220.360.013330.04700.00091450.185.42313.89.93296.05.59
114SH03156800.710.05570.002350.360.014130.04690.00093441.090.86311.910.55295.25.71
117SH0341531580.960.05760.001700.350.009370.04460.00080512.964.01307.37.03281.04.94
119SH036911580.580.05480.001640.350.009360.04600.00082402.864.99302.37.06289.65.08
123SH0371051730.610.05290.001640.330.009340.04560.00082322.968.87291.57.12287.75.08
124SH0381411570.900.05400.001800.340.010510.04630.00086371.773.18300.97.93291.95.28
125SH03928460.610.05700.002740.370.016690.04690.00099491.2103.17318.512.38295.36.08
126SH040641030.620.05490.001930.340.011140.04560.00086407.976.21300.88.41287.15.30
127SH04157760.760.05420.002230.350.013470.04680.00092379.989.4304.910.13295.15.67
128SH0421151350.850.05540.001760.350.010130.04610.00085426.268.96305.97.61290.25.22
129SH0431442350.610.05580.001630.380.010070.04990.00090445.763.39330.57.39314.25.51
130SH0441011610.630.05360.001730.360.010460.04810.00088355.770.98309.07.83302.75.42
131SH04568720.950.05320.002080.350.012820.04810.00093338.585.96306.99.62302.65.74
132SH04639630.620.05210.002220.330.013370.04630.00090289.294.52291.910.18292.05.57
134SH0481001570.630.05510.001760.360.010380.04670.00086416.569.37308.87.77294.45.27
140SH049761070.710.05410.001990.350.012040.04740.00091374.780.37307.79.03298.35.59
141SH0501472320.630.05500.001670.370.010060.04820.00088411.165.69316.77.48303.55.41
), ArticleFig(id=1307087575580176564, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Tab.2, caption=

Shahongshan flesh red regular granite LA-ICP MS Zircon U-Pb age test results

, figureFileSmall=null, figureFileBig=null, tableContent=
测点含量(10−6)Th/U同位素原子比率同位素年龄(Ma)
ThU207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ
006SH0014285280.810.05580.001310.370.007760.04850.00086443.551.1322.05.74305.35.27
008SH0034215450.770.05220.001240.320.006890.04520.00080293.953.5285.75.28284.74.94
010SH0056606111.080.05330.001260.330.006930.04510.00080339.952.5290.75.29284.64.93
011SH0064957040.700.05190.001250.320.006850.04470.00079281.854.0281.95.27281.94.90
012SH0072123210.660.05470.001390.340.007660.04460.00080400.155.1294.65.82281.54.95
014SH0092374150.570.05480.001360.340.007490.04460.00080403.254.3294.75.69281.24.92
016SH0114045450.740.05280.001270.330.007130.04580.00081320.353.6292.05.43288.45.02
017SH0123905260.740.05360.001320.340.007420.04550.00081355.554.7294.75.64287.15.02
022SH0146257350.850.05240.001210.320.006490.04380.00077304.851.7279.25.01276.24.78
024SH0163825400.710.05190.001310.320.007340.04500.00081282.556.8283.95.64284.05.00
026SH0185496530.840.05320.001240.320.006610.04330.00077335.552.2279.85.09273.24.75
027SH0194325730.750.05180.001240.320.006800.04450.00079274.653.9280.15.24280.74.90
028SH0202904480.650.05200.001260.320.007020.04500.00080283.254.6283.85.39283.84.96
029SH021761460.520.05100.001430.340.008630.04790.00088238.663.5294.56.56301.65.41
031SH0235376230.860.05670.001340.340.007220.04390.00078477.151.7299.45.46277.04.83
032SH0248318321.000.05170.001190.320.006540.04470.00079273.652.0281.05.04281.94.89
036SH0257608160.930.05190.001230.330.006920.04540.00081281.353.5285.95.30286.55.00
), ArticleFig(id=1307087575659868341, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=表2, caption=

沙红山肉红色正长花岗岩LA-ICP MS锆石U-Pb年龄测试结果

, figureFileSmall=null, figureFileBig=null, tableContent=
测点含量(10−6)Th/U同位素原子比率同位素年龄(Ma)
ThU207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ207Pb/206Pb1σ207Pb/235U1σ206Pb/238U1σ
006SH0014285280.810.05580.001310.370.007760.04850.00086443.551.1322.05.74305.35.27
008SH0034215450.770.05220.001240.320.006890.04520.00080293.953.5285.75.28284.74.94
010SH0056606111.080.05330.001260.330.006930.04510.00080339.952.5290.75.29284.64.93
011SH0064957040.700.05190.001250.320.006850.04470.00079281.854.0281.95.27281.94.90
012SH0072123210.660.05470.001390.340.007660.04460.00080400.155.1294.65.82281.54.95
014SH0092374150.570.05480.001360.340.007490.04460.00080403.254.3294.75.69281.24.92
016SH0114045450.740.05280.001270.330.007130.04580.00081320.353.6292.05.43288.45.02
017SH0123905260.740.05360.001320.340.007420.04550.00081355.554.7294.75.64287.15.02
022SH0146257350.850.05240.001210.320.006490.04380.00077304.851.7279.25.01276.24.78
024SH0163825400.710.05190.001310.320.007340.04500.00081282.556.8283.95.64284.05.00
026SH0185496530.840.05320.001240.320.006610.04330.00077335.552.2279.85.09273.24.75
027SH0194325730.750.05180.001240.320.006800.04450.00079274.653.9280.15.24280.74.90
028SH0202904480.650.05200.001260.320.007020.04500.00080283.254.6283.85.39283.84.96
029SH021761460.520.05100.001430.340.008630.04790.00088238.663.5294.56.56301.65.41
031SH0235376230.860.05670.001340.340.007220.04390.00078477.151.7299.45.46277.04.83
032SH0248318321.000.05170.001190.320.006540.04470.00079273.652.0281.05.04281.94.89
036SH0257608160.930.05190.001230.330.006920.04540.00081281.353.5285.95.30286.55.00
), ArticleFig(id=1307087575743754422, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Tab.3, caption=

Major element (%) of Shahongshan pluton

, figureFileSmall=null, figureFileBig=null, tableContent=
岩性花岗斑岩正长花岗岩
样品编号SHS01SHS02SHS03SHS04SHS05SHS06SHS07SHS08SHS09SHS10
SiO275.3375.4075.8974.7975.5575.7075.1576.2875.4675.74
Al2O312.1612.1311.9012.1512.5312.4312.3012.4112.4812.47
Fe2O32.552.502.911.981.972.012.191.952.452.00
FeO2.292.252.621.781.771.801.971.762.211.80
CaO0.600.590.291.050.990.460.640.370.430.41
MgO0.150.140.120.170.180.160.300.180.190.18
K2O5.175.226.015.334.665.044.954.975.015.02
Na2O2.822.680.002.292.713.203.093.153.233.27
BaO0.010.020.020.020.010.050.050.050.050.05
P2O50.020.020.020.020.020.020.020.020.020.02
TiO20.170.170.170.170.160.140.150.150.150.15
MnO0.040.040.020.030.040.030.030.030.030.03
LOI0.810.902.221.671.050.610.920.320.390.54
K2O/Na2O1.831.950.002.331.721.581.601.581.551.53
A/CNK1.421.431.891.401.501.431.421.461.441.43
A/NK1.521.541.981.601.701.511.531.531.511.50
), ArticleFig(id=1307087575823446199, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=表3, caption=

沙红山岩体主量元素(%)分析结果统计表

, figureFileSmall=null, figureFileBig=null, tableContent=
岩性花岗斑岩正长花岗岩
样品编号SHS01SHS02SHS03SHS04SHS05SHS06SHS07SHS08SHS09SHS10
SiO275.3375.4075.8974.7975.5575.7075.1576.2875.4675.74
Al2O312.1612.1311.9012.1512.5312.4312.3012.4112.4812.47
Fe2O32.552.502.911.981.972.012.191.952.452.00
FeO2.292.252.621.781.771.801.971.762.211.80
CaO0.600.590.291.050.990.460.640.370.430.41
MgO0.150.140.120.170.180.160.300.180.190.18
K2O5.175.226.015.334.665.044.954.975.015.02
Na2O2.822.680.002.292.713.203.093.153.233.27
BaO0.010.020.020.020.010.050.050.050.050.05
P2O50.020.020.020.020.020.020.020.020.020.02
TiO20.170.170.170.170.160.140.150.150.150.15
MnO0.040.040.020.030.040.030.030.030.030.03
LOI0.810.902.221.671.050.610.920.320.390.54
K2O/Na2O1.831.950.002.331.721.581.601.581.551.53
A/CNK1.421.431.891.401.501.431.421.461.441.43
A/NK1.521.541.981.601.701.511.531.531.511.50
), ArticleFig(id=1307087575911526584, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=EN, label=Tab.4, caption=

Trace element (10–6) of Shahongshan pluton

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岩性花岗斑岩正长花岗岩
野外编号SHS01SHS02SHS03SHS04SHS05SHS06SHS07SHS08SHS09SHS10
Hf9.439.578.399.579.564.844.725.165.195.11
Ta1.441.521.301.471.510.921.000.990.970.99
W10.89.807.557.598.395.466.326.836.105.72
U2.492.493.352.472.452.091.901.832.011.87
Bi0.510.421.100.370.420.110.230.320.120.095
Th20.420.519.620.320.121.520.620.220.420.4
K42896433194991344257387114186841097412984161841690
Ti101099810141028936867900882881906
P96.381.887.1102.598.7102.698.893.3108.7102.3
Ba83.2146.9147.2178.8125.4473.8459.0457.2488.4451.2
F517607546764327351315397321296
Sn6.846.686.296.786.658.726.348.207.465.19
Cr6.925.355.324.536.907.455.732.877.104.73
Li9.6010.426.29.916.3510.513.910.413.79.76
Be1.881.961.662.452.162.242.082.122.122.29
V6.692.997.375.334.085.426.165.327.395.57
Co1.471.460.901.041.201.221.531.381.501.36
Ni1.811.871.721.711.571.741.751.441.831.47
Ga23.724.521.024.224.017.017.517.117.417.4
Rb192200230216183204217206208213
Sr18.719.919.320.119.630.130.229.933.029.1
Y64.369.160.166.068.231.134.431.433.231.9
Zr369363324375368181173188199189
Nb22.123.120.323.022.910.210.811.210.810.4
Cs3.673.543.563.703.491.982.382.002.101.77
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沙红山岩体微量元素(10–6)分析结果统计表

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岩性花岗斑岩正长花岗岩
野外编号SHS01SHS02SHS03SHS04SHS05SHS06SHS07SHS08SHS09SHS10
Hf9.439.578.399.579.564.844.725.165.195.11
Ta1.441.521.301.471.510.921.000.990.970.99
W10.89.807.557.598.395.466.326.836.105.72
U2.492.493.352.472.452.091.901.832.011.87
Bi0.510.421.100.370.420.110.230.320.120.095
Th20.420.519.620.320.121.520.620.220.420.4
K42896433194991344257387114186841097412984161841690
Ti101099810141028936867900882881906
P96.381.887.1102.598.7102.698.893.3108.7102.3
Ba83.2146.9147.2178.8125.4473.8459.0457.2488.4451.2
F517607546764327351315397321296
Sn6.846.686.296.786.658.726.348.207.465.19
Cr6.925.355.324.536.907.455.732.877.104.73
Li9.6010.426.29.916.3510.513.910.413.79.76
Be1.881.961.662.452.162.242.082.122.122.29
V6.692.997.375.334.085.426.165.327.395.57
Co1.471.460.901.041.201.221.531.381.501.36
Ni1.811.871.721.711.571.741.751.441.831.47
Ga23.724.521.024.224.017.017.517.117.417.4
Rb192200230216183204217206208213
Sr18.719.919.320.119.630.130.229.933.029.1
Y64.369.160.166.068.231.134.431.433.231.9
Zr369363324375368181173188199189
Nb22.123.120.323.022.910.210.811.210.810.4
Cs3.673.543.563.703.491.982.382.002.101.77
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Rare earth elements (10–6) of Shahongshan pluton

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岩性花岗斑岩正长花岗岩
样品编号SHS01SHS02SHS03SHS04SHS05SHS06SHS07SHS08SHS09SHS10
La80.287.377.783.279.837.643.040.440.841.7
Ce16117815617016777.289.384.584.187.4
Pr17.719.317.118.217.87.728.758.298.258.48
Nd70.776.868.373.271.029.333.431.831.532.2
Sm13.815.013.314.314.25.836.386.316.086.24
Eu0.370.380.340.370.360.540.570.570.580.58
Gd14.215.313.714.614.56.126.706.626.476.48
Tb2.092.241.982.172.150.951.021.001.001.00
Dy12.113.011.312.612.85.726.185.996.026.00
Ho2.392.582.262.482.541.171.261.201.231.21
Er7.107.626.597.357.483.603.893.603.723.69
Tm0.971.060.911.011.040.530.570.520.540.54
Yb6.196.645.686.356.593.403.663.363.543.58
Lu0.941.010.870.970.990.530.560.510.540.55
∑REE389.75426.23376.03406.80398.25180.21205.24194.67194.37199.65
LREE329.60361.40319.10344.60335.60151.82174.45164.99164.65169.78
HREE60.1564.8356.9362.2062.6528.3930.7929.6829.7229.87
), ArticleFig(id=1307087576142213307, tenantId=1146029695717560320, journalId=1306274195778404443, articleId=1307087565471903842, language=CN, label=表5, caption=

沙红山岩体稀土元素(10–6)分析结果统计表

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岩性花岗斑岩正长花岗岩
样品编号SHS01SHS02SHS03SHS04SHS05SHS06SHS07SHS08SHS09SHS10
La80.287.377.783.279.837.643.040.440.841.7
Ce16117815617016777.289.384.584.187.4
Pr17.719.317.118.217.87.728.758.298.258.48
Nd70.776.868.373.271.029.333.431.831.532.2
Sm13.815.013.314.314.25.836.386.316.086.24
Eu0.370.380.340.370.360.540.570.570.580.58
Gd14.215.313.714.614.56.126.706.626.476.48
Tb2.092.241.982.172.150.951.021.001.001.00
Dy12.113.011.312.612.85.726.185.996.026.00
Ho2.392.582.262.482.541.171.261.201.231.21
Er7.107.626.597.357.483.603.893.603.723.69
Tm0.971.060.911.011.040.530.570.520.540.54
Yb6.196.645.686.356.593.403.663.363.543.58
Lu0.941.010.870.970.990.530.560.510.540.55
∑REE389.75426.23376.03406.80398.25180.21205.24194.67194.37199.65
LREE329.60361.40319.10344.60335.60151.82174.45164.99164.65169.78
HREE60.1564.8356.9362.2062.6528.3930.7929.6829.7229.87
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甘肃北山地区沙红山岩体年代学、地球化学特征及岩石成因
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李嘉伟 1 , 唐卫东 1 , 刘天航 1 , 杨瀚文 1 , 肖佳亮 2 , 李强 1 , 潘元 1
西北地质 | 中亚成矿域关键矿产研究进展 2026,59(3): 165-181
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西北地质 |中亚成矿域关键矿产研究进展 2026 , 59 (3) : 165 -181
甘肃北山地区沙红山岩体年代学、地球化学特征及岩石成因
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李嘉伟(1992−),男,工程师,从事矿产资源调查评价。E−mail:

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李嘉伟1 , 唐卫东1, 刘天航1, 杨瀚文1, 肖佳亮2, 李强1, 潘元1
作者信息
  • 1中国地质调查局西安矿产资源调查中心,陕西 西安 710054
  • 2中国地质大学(北京) 地球科学与资源学院,北京 100083
作者简介:

李嘉伟(1992−),男,工程师,从事矿产资源调查评价。E−mail:

Chronology, Geochemical Characteristics and Rock Genesis of Shahongshan Pluton in Beishan Area, Gansu Provice
Jiawei LI1 , Weidong TANG1, Tianhang LIU1, Hanwen YANG1, Jialiang XIAO2, Qiang LI1, Yuan PAN1
Affiliations
  • 1Xi'an Center of Mineral Resources Survey, China Geological Survey, Xi'an 710054, Shaanxi, China
  • 2School of Earth Science and Rosources, China University of Geosciences (Beijing), Beijing 100083, China
出版时间: 2026-06-20 doi: 10.12401/j.nwg.2025077
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甘肃沙红山岩体位于甘蒙交界处,大地构造位置处于华北板块、塔里木板块和哈萨克斯坦板块的交汇地带,构造岩浆活动分布广泛。笔者对沙红山岩体中肉红色花岗斑岩和正长花岗岩开展了LA-ICP-MS锆石U-Pb定年、岩石学和主微量元素分析,分析岩石侵位时代和成因,探讨北山造山带构造演化的历程。沙红山岩体中肉红色花岗斑岩LA-ICP-MS锆石U-Pb加权平均年龄为(294.7±4.0)Ma,肉红色正长花岗岩的加权平均年龄为(284.2±4.0)Ma,为早二叠世。岩石地球化学分析表明,沙红山岩体为钙碱性–高钾钙碱性岩石系列,具高硅(74.79%~76.28%),富碱(6.01%~8.30%)和过铝质(A/CNK=1.40~1.89)特征。稀土元素总量较高,轻稀土总量(平均为251.60×10−6)明显高于重稀土总量(平均为45.52×10−6);球粒陨石标准化曲线明显右倾,轻重稀土比为LREE/HREE=5.35~5.68,LaN/YbN值为7.93~9.81,轻重稀土分馏较为明显;样品的具有明显的Eu负异常。微量元素相对富集大离子亲石元素Rb和强不相容元素Th、U及高场强元素Zr、Hf,显著亏损高场强元素Ba、Nb、Ti、P。结合区域地质背景认为,A型花岗岩以肉红色花岗斑岩为代表,形成于伸展环境,具有特定的岩石学、矿物学和地球化学特征,其岩浆来源主要是壳源物质,可能混有少量幔源物质。I型花岗岩以肉红色正长花岗岩为代表,其成因可能与幔源岩浆的结晶分异、下地壳变质火成岩的部分熔融或幔源岩浆改造的地壳沉积物重熔有关。沙红山岩体的形成与早二叠世的后碰撞拉伸环境及局部挤压应力有关,经历了复杂的岩浆上升、分离结晶、同化混染和混合作用过程。因此,笔者认为沙红山岩体形成的构造背景为后碰撞板内裂谷环境。

甘肃北山地区  /  沙红山岩体  /  U-Pb锆石定年  /  岩石地球化学

The Shahongshan pluton is located at the junction of Gansu Province and Inner Mongolia, which is at the intersection of the North China plate, the Tarim plate and the Kazakhstan plate. In addition, the tectonic magmatic activity is widely distributed. In this paper, the LA-ICP-MS zircon U-Pb dating, petrology, major and trace element analysis were carried out on the rocks of Shahongshan pluton, including granite porphyry and syenogranite, in order to unravel the regional intrusion age, rock genesis and the tectonic evolution of the Beishan orogenic belt. LA-ICP-MS Zircon U-Pb dating show that the weighted average age of the granite porphyry and syenogranite was (294.7±4.0) Ma, and (284.2±4.0) Ma, respectively, indicating that they formed in Early Permian. Petrological geochemical analyses show that granites of the Shahongshan pluton belong to calcium-alkaline to high potassium-calcium alkaline rock series, which are characterized by high silicon (74.79%~76.28%), alkali-rich (6.01%~8.30%), and aluminous (A/CNK=1.40~1.89). The total amount of rare earth elements was high, with enrichment in the light rare earth element (LREE; average 251.60×10−6) and depletion in the heavy rare earth element (HREE; average 45.52×10−6). The standardization curve of chondrite meteorite was significantly right-tilted, the LREE/HREE ratios of 5.35~5.68 and LaN/YbN values of 7.93~9.81, indicating a remarkable fractionation of light and heavy rare earths elements. The samples had obvious negative Eu anomalies. Trace elements are relatively enriched with large ionic lipophilic elements Rb, strong incompatible elements Th, U and high field strength elements Zr and Hf, and significant losses are lost to high field strength elements Ba, Nb, Ti and P. In combination with the regional geological background, The A-type granite, represented by the flesh red granite porphyry, was formed in an extensional environment and has specific petrological, mineralogical and geochemical characteristics. Its magma source is mainly crust-derived material, and may be mixed with a small amount of mantle-derived material. The I-type granites, represented by the flesh red syenogranite, may be related to the crystallization differentiation of mantle-derived magma, the partial melting of metamorphic igneous rocks in the lower crust, or the remelting of crust sediments modified by mantle-derived magma. The formation of the Shahongshan pluton is related to the post-collisional tensile environment and local compressive stress in the Early Permian, and has undergone complex processes of magma ascent, separation and crystallization, assimilation and contamination, and mixing. It is concluded that the tectonic background of Shahongshan pluton is the post-collisional plate rift valley environment.

Gansu Beishan area  /  Shahongshan pluton  /  U-Pb zircon dating  /  petrogeochemistry
李嘉伟, 唐卫东, 刘天航, 杨瀚文, 肖佳亮, 李强, 潘元. 甘肃北山地区沙红山岩体年代学、地球化学特征及岩石成因. 西北地质, 2026 , 59 (3) : 165 -181 . DOI: 10.12401/j.nwg.2025077
Jiawei LI, Weidong TANG, Tianhang LIU, Hanwen YANG, Jialiang XIAO, Qiang LI, Yuan PAN. Chronology, Geochemical Characteristics and Rock Genesis of Shahongshan Pluton in Beishan Area, Gansu Provice[J]. Northwestern Geology, 2026 , 59 (3) : 165 -181 . DOI: 10.12401/j.nwg.2025077
北山地区地处西伯利亚板块、哈萨克斯坦板块和塔里木板块交汇处。寒武纪来,历经了两次主要的俯冲–碰撞造山作用,多期次构造–岩浆演化旋回(左国朝等,1990)。
花岗岩浆的形成和演化能够制约壳幔物质相互作用关系,包含着岩石圈演化的重要信息,直接影响着花岗岩的成因类型以及成分的多样性。研究花岗岩对地球科学研究来说具有重要的实际意义,不同类型的花岗岩,岩石矿物组合反映了不同的构造环境和大地动力学背景,相关手段的研究能够进一步认识到不同花岗岩的起源和演化(王涛,2000;吴福元等,2007;徐夕生等,2020)。
自20世纪90年代以来,覆盖北山地区的地质科研工作相继展开。不同时期、不同学者研究的侧重点有所不同,所取得的成果无疑对提高本区的地质研究程度起着推进作用。1991年,内蒙古自治区地质矿产局组织编写并出版了《内蒙古自治区区域地质志》及系列图件;1996年,内蒙古自治区地质矿产局组织编写并出版了《内蒙古自治区岩石地层》;1999~2001年,由中国地质科学院矿产资源研究所聂风军等完成“蒙甘新相邻(北山)地区综合找矿预测和评价”专题。2001年,邵和明等完成“内蒙古自治区主要成矿区(带)和成矿系列”等专题研究;2002~2004年,甘肃省地质调查院、中国地质调查局西安地质调查中心、内蒙古自治区地质调查院分别对北山地区进行“甘新蒙北山构造–成矿地质构造环境以及与周边成矿带成矿地质条件对比研究”“北山成矿带找矿重大问题研究”“内蒙古自治区北山成矿远景区找矿方向和选区研究”等专题研究。上述历史研究工作从不同的角度对北山地区成矿环境、成矿地质条件、成矿规律、找矿方向及影响地质的重大问题进行了论述,是提高本区综合研究程度的重要理论依据。
北山地区花岗岩出露面积大,岩浆活动记录和已知的同位素年龄范围从太古宙至中新生代可分为前寒武纪,早古生代,晚古生代和中新生代等4个时期的构造–岩浆事件,北山地区晚古生代岩浆活动十分频繁,尤其以石炭纪—二叠纪火山岩最为常见,前人研究多集中在该期玄武质火山岩是否来自地幔柱、后碰撞伸展环境与地幔柱作用相互关系、火山作用与成矿等方面(校培喜等,2010;郑荣国等,2012;王国强等,2015;田健等,2020;丁书宏,2021)。北山地区泥盆纪和石炭纪花岗岩类的研究程度较高,而二叠纪花岗岩类的研究比较薄弱,从而对北山地区晚古生代构造岩浆演化缺乏完整的认识,对红柳井–东疙瘩井–月牙山–沙红山一带大规模产出的花岗质侵入杂岩体野外产状、形成时代及与区内产出的铜、铁、金、锑、萤石等矿化关系等认识基本处于空白状态。
本次工作以北山地区的沙红山岩体花岗斑岩、正长花岗岩为研究对象, 通过U-Pb锆石测年、岩石地球化学主微量分析测试, 探讨该岩体的侵位时代及岩石成因等, 为研究北山地区早二叠世岩浆活动提供新的依据。笔者初步厘清了区内花岗岩的产状及规模,识别并查明了区内岩体与各类矿化的关系,系统采集月牙山一带产出的花岗岩体样品,对沙红山岩体进行岩相学、岩石地球化学、锆石U-Pb年代学分析,探讨其岩石成因、源区及构造背景,揭示北山造山带中北部构造演化过程,进一步深化北山造山带岩体深部动力学机制的认识,并指导在该区进行矿产资源勘查具有重要的意义。
北山造山带隶属中亚造山带中段南缘,地处塔里木、华北、西伯利亚和哈萨克斯坦板块的交汇部位(图1a;陈阳阳等,2024;王必任等,2024)。其西侧以星星峡断裂与东天山构造带相隔,东被巴丹吉林沙漠所覆盖,南邻敦煌地块,接蒙古增生造山带。研究区位于北山地区中南部,大地构造位置处于北山弧盆系与敦煌陆块之间部位,北部为哈萨克斯坦板块,南测为敦煌陆块。北山造山带是一条具复杂构造演化的多旋回复合造山带,经历了多期次的板块裂解–俯冲–碰撞–拼合的构造运动(龚全胜等,2003;杨合群等,2006;袁禹,2019;查显锋等,2024)。
研究区出露地层以古生界和新生界为主,元古界为次(图1b),元古界地层仅出露于西南部和北东部,新生界普遍发育。石炭系为海相火山岩碎屑岩沉积,火山喷发岩以蕴藏锑、金、铁、铜等矿化为特征,Sb、Au、As、Cu、Pb、Ag等元素含量克拉克值相对较高,矿种类型多样、成因复杂,是重要的锑金矿含矿地层。早白垩世赤金堡组以湖泊相碎屑沉积岩为主,气候趋于干燥环境,形成了菱铁矿。研究区侵入岩较发育,北山地区花岗岩类岩石分布广泛,主要发育不同时期的花岗岩,以志留纪、二叠纪和三叠纪侵入岩为主,其中志留纪侵入岩与阿木乌苏金矿点成矿关系密切(江思宏等,2006)。三叠纪沙红山侵入岩与沙红山萤石矿点成矿关系极为密切。区内构造较发育,褶皱较发育。断裂构造有不同层次、不同期次、不同性质的韧性、脆韧性断层、脆性断层。
侵入岩多沿构造带呈带状分布于五道明水、月牙山、黑石山、沙红山、北卧虎山、多头山等一带。侵入岩空间上总体呈带状展布,时间上跳跃式延续,从古元古代至三叠纪均有出露,显示明显的旋回性和多期次性(修群业,1999;袁禹,2019)。岩石类型复杂,从中基性–中酸性均有产出,以志留纪、二叠纪、三叠纪岩体为代表。志留纪侵入岩与阿木乌苏金矿点成矿关系密切。三叠纪沙红山侵入岩与沙红山萤石矿点成矿关系极为密切。
北山地区由于受构造、岩浆、热液活动的叠加影响,形成有中酸性侵入岩接触蚀变带、韧性剪切变形带及与密切相关的铁、铜、镍、钨、钼、铅、锌等金属矿产,以及萤石、煤矿及白云石、石灰石等沉积矿产。区域上已发现各类矿床和矿(化)点达数十余处,而调查区已发现各类矿床、矿(化)点十余处,包括铜、铁、金、锑、萤石等(陈耀等,2023;杨镇熙等,2023;刘诚等,2024)。研究区内加里东期、华力西期、印支期花岗岩与古元古代北山群、早古生代公婆泉组、晚古生代红柳园组和干泉组一段接触带普遍发育有角岩化、硅化、绿泥石化、绢云母化、碳酸盐化等。其中加里东晚期,在阿木乌苏一带,由于造山运动,形成志留纪弧后盆地相火山岩和志留纪侵入岩,并形成了一系列重要的铜锑金矿床(点)。北山群、公婆泉组火山岩和志留纪侵入岩,为区内主要的赋矿地质体。华力西期中期,岩浆活动频繁,形成干泉组火山岩,并形成沉积型铁矿床,而在华力西晚期形成沉积型锰矿床和构造蚀变岩型金矿化点。印支晚期,构造活动频繁、岩浆活动加剧,形成了沙红山侵入岩及低温热液型萤石矿点。因此,研究区经历不同机制、不同期次的岩浆活变质作用–构造作用的演化。
本次工作对北山地区沙红山岩体花岗斑岩和正长花岗岩进行了样品采集,其中岩石全分析、微量元素2组,共10件,锆石U-Pb年龄样2件,尽量采集的是风化、蚀变程度低的新鲜岩石,避开脉体及外来包体。采样地理坐标分别为N 40°50′49″,E 99°43′21″;N 40°51′01″,E 99°42′21″。
锆石样品制靶及透射光、反射光、阴极(CL)图像采集均在河北省廊坊诚信地质服务有限公司完成。LA-ICP-MS 锆石U-Pb 同位素测试在中国地质调查局西安地质调查中心实验室完成。激光剥蚀系统为Geolas Pro准分子固体进样系统,ICP-MS设备为Agilent 7700x等离子体质谱仪。测试过程中,激光束斑直径为32 μm,频率为6 Hz,能量密度6 J/cm2,采用He作为载气,Ar气作为补偿气,以美国国家标准参考物质NIST610作为测定微量元素含量的外标,标准锆石91500(206Pb/238U=1065 Ma)作为定年外标(王涛,2000;徐夕生等,2020),标准锆石Plešovice作为监控样品(Sláma et al.,2008)。样品分析过程中,每测定5个样品点测定两次标准锆石91500,每个样品的信号采集时间共100 s,其中前20 s作为背景信号采集时间,样品信号采集时间50 s。岩石试样经锆石单矿物挑选、制备样品靶之后,拍摄阴极发光图像、透射光图像和反射光图像,选取分析点位;用激光剥蚀等离子体质谱仪原位分析锆石微区的铀铅比值(206Pb/238U、207Pb/235U和207Pb/206Pb);应用Glitter计算程序计算锆石的表面年龄及标准偏差,并对测试过程中产生的元素分馏和质量歧视进行校正;测试完成后,采用软件ICPMSDataCal(Liu et al.,2010)对测试数据进行后期处理,加权平均U-Pb年龄和谐和图使用ISOPLOT4.0软件计算得出。
样品均采自未遭受矿化蚀变的肉红色花岗斑岩和正长花岗岩,岩石整体新鲜。样品在中国地质调查局西安矿产资源调查中心实验室进行了主微量及稀土元素分析,主量元素采用PW4400X射线荧光光谱仪测定,微量和稀土元素采用X SeriesII等离子体质谱仪测定,分析精度优于5%。利用酸溶法制备样品的微量元素溶液,利用等离子体质谱法(ICP-MS)分析样品溶液,采用的仪器为美国产ThermoFisher X Series Ⅱ型四极杆等离子体质谱仪,当微量元素含量大于10×10−6时,分析精度优于5%;当含量小于10×10−6时,分析精度优于10%。在测试过程中,利用平行样和标样对测试过程进行监控和检验,以保证数据的准确性与可靠性。
沙红山岩体主体分布于月牙山以东沙红山一带,由花岗斑岩体、正长花岗岩体和二长花岗岩体3个侵入岩体组成,侵入岩体与围岩晚石炭世干泉组呈侵入接触关系,小面积侵入于下二叠统双堡塘组中;卧虎山西岩株主要侵入于蓟县系平头山组中,局部与下二叠统双堡塘组为侵入接触关系。总体呈近EW向展布,基岩裸露较好,地形起伏轻缓。
肉红色花岗斑岩呈斑状结构,基质具显微粒状结构,块状构造。矿物成分为斑晶与基质两部分组成,斑晶包括斜长石(10%)、钾长石(15%)、石英(3%),基质为长英质(64%)、黑云母(8%)。斑晶斜长石,为宽板状,板状,粒径小于5.0 mm,发生较微弱的绢云母化、黏土化、帘石化蚀变,双晶细密,为酸性斜长石。钾长石斑晶为他形晶粒状,为正长石和条纹长石、微斜长石,条纹长石具条纹结构,微斜长石具格子双晶,见不同程度的高岭土化,粒径小于4.0 mm。石英斑晶为他形晶粒状,波状消光明显,具不同程度的熔蚀港湾,粒径小于2.0 mm。斑晶不均匀分布在基质中。基质为长英质,为显微粒状集合体,矿物粒径基本上小于0.2 mm,光性明显,基本上能清晰分辨颗粒界限,基质矿物晶形细小,杂乱分布,以钾长石为主,斜长石和石英次之,少量黑云母(图2b、图2c)。
肉红色正长花岗岩分布于沙红山西侧,呈不规则状侵入于干泉组中,岩体边部具角岩化和烘烤现象,岩体穿插于地层中。岩性为正长花岗岩:肉红色,具文象结构,细–中粒结构,主要矿物为钾长石、斜长石、石英和黑云母。钾长石:肉红色,自形–半自形结构,含量为50%~55%,粒度为2~4 mm。斜长石:灰白色,大小为1~3 mm,含量为10%~15%。石英:无色,他形粒状,含量为20%~25%。暗色矿物为黑云母,具绿泥石化,片状,大小为1~3 mm,含量为5%~6%(图2e、图2f)。
笔者对沙红山岩体出露的肉红色花岗斑岩和正长花岗岩进行了锆石U-Pb定年和锆石阴极发光(CL)拍照。
肉红色花岗斑岩的锆石为无色透明或浅黄色,锆石形态完整,结晶良好,大小为60~180 μm,阴极发光中震荡环带清晰,具有典型的岩浆锆石特征,Th/U值为0.65~1.08,指示典型岩浆锆石成因。分析测试数据(表1)均分布于谐和曲线上或其附近,17个测点的206Pb/238U表面分布年龄为281.0~314.2 Ma,206Pb/238U加权平均年龄为(294.7±4.0)Ma(n=17,MSWD=3.0),该年龄代表肉红色花岗斑岩的结晶年龄(图3c),表明其形成于早二叠世。
肉红色正长花岗岩的锆石大部分呈呈无色透明状, 外形多为半自形–自形柱状或粒状, 晶形完好,长为50~140 μm,Th/U值为0.58~0.96,指示典型岩浆锆石成因。17个测点的206Pb/238U表面分布年龄为273.2~305.3 Ma(表2),206Pb/238U加权平均年龄为(284.2±4.0)Ma(n=17,MSWD=2.5),该年龄代表肉红色正长花岗岩的结晶年龄(图3d),表明其形成于早二叠世。
研究区样品的SiO2含量较高(74.79%~76.28%),K2O和Na2O含量较高,K2O含量为4.66%~6.01%,平均值为5.14;Na2O为2.29%~3.2%;K2O+Na2O为6.01%~8.30%,平均值为7.78%,全碱含量偏高;K2O/Na2O为1.53~2.33(平均为1.74),钾质含量明显高于钠质含量,属钙碱性–高钾钙碱性系列(表3,图4a、图4c);Al2O3含量为11.90%~12.53%;CaO含量为0.29%~1.05%,铝饱和指数A/CNK值为1.40~1.89,平均值为1.48;A/NK值为1.50~1.98,平均值为1.59,为过铝质系列(表3,图4b)。TAS图解中,样品均落于花岗岩区域(图4a)。主量元素显示,岩石具有高Fe、低Mg特征(图4d)。
沙红山岩体在原始地幔标准化蛛网图解中(表4,图5a),样品相对富集大离子亲石元素Rb和强不相容元素Th、U及高场强元素Zr、Hf、Sm等,显著亏损高场强元素Ba、Ta、Nb、Ti、P等,与造山带弧岩浆作用形成的钙碱性系列岩石特征相似。沙红山岩体中样品的稀土总量偏低,变化较小(180.21×10−6~426.23×10−6),轻稀土总量平均为251.60×10−6(表5),明显高于重稀土总量(平均值为45.52×10−6)。球粒陨石标准化曲线(图5b)明显右倾(轻重稀土比为5.35~5.68),LaN/YbN值为7.93~9.81,平均值为8.82。轻重稀土分馏较为明显;样品的具有明显的Eu负异常。
肉红色花岗斑岩中稀土含量比肉红色正长花岗岩高,而Eu含量更低。肉红色花岗斑岩中的Hf、Ta、U、Bi、F、Y、Zr、Nb、的含量明显高于正长花岗岩,Ba、Sr含量花岗斑岩比正长花岗岩明显要低。
在球粒陨石标准化的稀土配分模式图上显示样品稀土元素分布呈右倾式,轻稀土斜率大于重稀土曲线斜率,说明轻稀土分馏程度高于重稀土。其中曲线于Eu处呈沟谷状,存在明显的负Eu异常,反映岩浆源区斜长石的分离结晶作用强烈。
本次研究采用LA-ICP-MS方法分别获得沙红山岩体的肉红色花岗斑岩、正长花岗岩的锆石U-Pb年龄为(294.7±4.0)Ma和(284.2±4.0)Ma。前人在研究区也开展过一些年代学测试,根据锆石U-Pb法测定北卧虎山的正长花岗岩成岩年龄为(289.8±2.7)Ma,黑石山东正长花岗岩成岩年龄为(284.8±3.9)Ma,时代均为早二叠世。测定的年龄与本次研究所获取的年龄数据基本吻合。因此,本次LA-ICP-MS方法测定的年龄代表了沙红山岩体的形成时代。
在晚石炭世末期,哈萨克斯坦板块与塔里木板块通过弧–弧碰撞,引发了造山运动,结束了红石山–百合山–蓬勃山大洋及板块的演化格局。随后,调查区在早二叠世进入了板内演化阶段,形成了板内裂谷,并经历了后造山期的构造活动,这些活动自北向南逐渐显现。
本次研究使用LA-ICP-MS方法测定了沙红山岩体的肉红色花岗斑岩和正长花岗岩的锆石U-Pb年龄分别为(294.7±4.0)Ma和(284.2±4.0)Ma,与之前的研究结果基本吻合,表明沙红山岩体的形成时代为早二叠世。月牙山和卧虎山岩体的锆石U-Pb同位素测年样品也显示出早二叠世的年龄,分别为(287.3±4.6)Ma和(283.8±2.7)Ma(根据《内蒙古自治区阿拉善盟乱石山北等4幅1∶5万区域矿产地质调查报告》)。
花岗岩的形成和演化记录了大陆地壳形成、生长和再造的重要信息。活动大陆边缘陆壳的形成与演化涉及大陆的侧向增生和垂向增生和分异,其标志是伴随着大量花岗岩的形成,而陆内环境下的大陆再造也可以产生大量的花岗岩(Raimondo et al.,2010)。I-S-M-A分类方案是当前地学界最主流的花岗岩分类方案,不同类型的花岗岩具有特定的岩相学与岩石地球化学特征(Chappell et al.,1974,1991;Whalen et al.,1987;King et al.,2001)。其中A型花岗岩自提出以来就一直是地质学家热议的话题,从定义、成因、特征到构造环境意义受到广泛的关注与讨论。传统意义上的A型花岗岩被定义为“3A”,即贫水的(anhydrous)、碱性的(alkaline)、非造山的(anorogenic)(Loiselle et al.,1979)。随着研究的深入,这些观点在渐渐地过时,定义已经有了很大的变化。A型花岗岩作为一种形成于伸展环境下特殊的岩石,有着显著的岩石学、矿物学和地球化学特征,对构造环境有着重要的指示意义。早期研究一般认为,I型花岗岩由壳内变质中基性火成岩部分熔融而来(Chappell et al.,1974)。I型花岗岩I型花岗岩源岩主要是未经地表风化的火成岩,一般是基性程度较高的火成岩、变质火成岩等,显然会继承火成岩的一些性质特征,从地球化学特征上看,I型花岗岩中Na含量比较高,A/CNK(铝饱和指数)<1.1(杨合群等,2009;朱弟成等,2009;吴庆,2014;张辉等,2015)。
根据岩石的10000*Ga/Al、Nb、Ce等参数可以有效区分A型花岗岩,样品中肉红色花岗斑岩10000*Ga/Al平均值为3.64,Zr含量平均值为360×10−6,Ce含量平均值为166×10−6,数据全部高于A型花岗岩下限值(10000*Ga/Al=2.6,Zr=250×10−6,Ce=148×10−6)(Whalen et al.,1987)。肉红色正长花岗岩10000*Ga/Al平均值为2.63,Zr含量平均值为186×10−6,Ce含量平均值为85×10−6,Zr、Ce的含量低于A型花岗岩下限值。在SiO2-Nb图解和SiO2-Ce图解上,花岗斑岩和正长花岗岩分别落于A型、I型花岗岩区域;在10000*Ga/Al-Zr图解、10000*Ga/Al-Ce、10000*Ga/Al-Nb图解中(图6),肉红色花岗斑岩样品落入A型花岗岩区域,肉红色正长花岗岩落入I型花岗岩区域和A型花岗岩的分界线上。因此判定肉红色花岗斑岩和正长花岗岩的分别是A型花岗岩和I型花岗岩。
前文提到沙红山岩体的肉红色花岗斑岩为A型花岗岩。花岗质岩石主要来源于地壳岩石的部分熔融(吴福元等,2007),幔源岩浆和壳源岩浆的Nb/Ta值分别为17.5和11~12,肉红色花岗斑岩的的Nb/Ta值为15.17~15.65,平均值为15.39,稍高于壳源岩浆的Nb/Ta值。笔者认为肉红色花岗斑岩的花岗质岩浆来源主要是壳源物质,岩浆形成过程中可能有少量的幔源物质混入。
沙红山岩体的正长花岗岩属于I型花岗岩,I型花岗岩的成因一般主流观点有以下3个:①幔源岩浆侵位发生大范围的结晶分异和同化混染作用产生的岩浆形成I型花岗岩(Chappell et al.,1974,1991),这个模式形成的I型花岗岩具有较为宽泛的成分变化范围,并且通常与一系列同源的堆晶岩等中基性岩石密切共生;②由下地壳变质火成岩部分熔融形成,可能会有地幔物质的参与(Kemp et al.,2007);③由幔源岩浆改造的地壳沉积物重熔而成,此过程形成的I型花岗岩多具有成分不均一的锆石Hf同位素(Collins et al.,2008)。
研究区在早二叠世,进入后碰撞拉伸环境,但造山作用尚未结束,局部存在挤压应力。部分脆弱的岩石圈过早地发生拆沉作用,引起地幔底辟上升部分熔融而形成玄武岩浆,这种原始岩浆在上升过程中引起下地壳基性火成岩的熔融,熔融体上升侵位,经过强烈的分离结晶。随后,玄武岩浆底侵作用又导致下地壳物质及上地壳物质的部分熔融,在岩浆上升过程中可能发生不同程度的调整作用,包括分离结晶作用、同化混染作用及混合作用,最终形成沙红山岩体中的肉红色正长花岗岩。
在元古代经历了漫长的地质演化之后,调查区及其邻近地区的陆壳逐渐成熟。进入古生代,北山地区迎来了陆块裂解和陆内裂谷发展演化的重要阶段。
在早古生代,北山地区受到塔里木东北缘板块活动的影响,开始了新一轮的裂解过程。在凤凰山幅图幅北部的古硐井地区,寒武纪时期沉积了一套由碳泥质岩、碳酸盐岩和含磷碎屑岩组成的建造。到了早奥陶世,裂解规模进一步扩大,部分地区在加里东晚期出现了洋盆型的沉积建造。早志留世早期,阿木乌苏地区主要处于拉张环境,这期间形成了工作区南西部的早古生代中酸性侵入岩,这些侵入岩侵入了北山群。随后,随着区域应力由拉张转变为相对挤压,早古生代中晚期的裂陷海盆开始收缩,形成了以玄武岩为主的岛弧相公婆泉组,以及浅海相的碎屑岩和火山碎屑岩沉积建造。志留纪末期,加里东运动的发生导致早古生代的裂解海槽受到挤压而闭合,地层经历了浅变质和弱变形。与此同时,在调查区北东部的多头山一带,形成了总体属于挤压–地壳重熔型的花岗岩。晚古生代,特别是石炭纪—二叠纪,调查区进入了构造岩浆作用的活跃期。石炭纪开始,新的大规模拉张导致北山陆内裂谷自东向西扩展,影响了调查区,使其卷入裂谷构造活动。早石炭世,随着拉张作用的持续,在旱山地块和敦煌地块之间发育了规模较大的区域性断裂,主要沉积区位于黑石山一带。晚石炭世晚期,区域应力由拉张转为挤压,裂谷海盆收缩,海水变浅,火山活动加剧。华力西中期构造运动导致石炭纪裂谷海盆闭合,表现为浅变质和强变形特征,同时发生了区域低温动力热流变质,局部形成了变质沉积型铁矿。进入二叠纪早期,区域应力再次转为拉张,调查区及相邻地区出现新的拉张裂解,虽然裂解范围较小,强度不大,但伴随着裂解作用,沙红山、月牙山、黑石山和北卧虎山等地发生了岩浆活动。二叠纪早期沉积区位于红柳井、凤凰山一带,沉积了一套浅海相细碎屑岩建造。中二叠世末期,华力西晚期构造运动导致二叠纪裂谷彻底关闭,地层褶皱回返造山,结束了海相沉积历史。调查区发育了一系列逆冲断层和褶皱,地层发生了低绿片岩相变质。强烈的收缩挤压作用导致地壳下部物质局部熔融,形成了中酸性岩浆,并在构造薄弱地带多次侵位,形成了、月牙山、黑石山、北卧虎山、阿木乌苏等中酸性侵入岩和辉长岩基性侵入岩,以及一系列近EW向、NW向的基性岩脉。至此,北山地区完成了盆山转化,调查区及相邻地区的地形地貌和地质构造格局基本形成。
构造背景、形成时代和主微量元素特征的综合分析表明,沙红山岩体的岩石成因与以下因素密切相关。北山地区在晚石炭世末至早二叠世期间,经历了哈萨克斯坦板块和塔里木板块的弧–弧碰撞,导致了碰撞造山作用,结束了大洋及板块的演化格局,并进入了板内裂谷阶段。这一碰撞造山事件与古亚洲洋的闭合有关,发生在二叠纪—早三叠世,随后进入后造山环境。北山地区的构造活动与北侧汇聚岛弧边界大致平行,表明该地区的岩浆活动与区域构造线展布方向一致,是同一构造活动的产物。LA-ICP-MS方法测定的沙红山岩体的锆石U-Pb年龄为(294.7±4.0)Ma和(284.2±4.0)Ma,表明其形成时代为早二叠世,与区域构造演化阶段相符。
在主微量元素特征上,沙红山岩体的花岗斑岩和正长花岗岩具有高SiO2、K2O和Na2O含量,属于钙碱性-高钾钙碱性系列,过铝质系列,显示出高铁低镁的特征。微量元素和稀土元素特征表明,岩石相对富集大离子亲石元素和强不相容元素,亏损高场强元素,这与造山带弧岩浆作用形成的钙碱性系列岩石特征相似。稀土元素总量偏低,轻重稀土分馏明显,具有明显的Eu负异常,这反映了岩浆源区斜长石的分离结晶作用。
综合判断分析,沙红山岩体的岩石成因与晚石炭世至早二叠世的弧–弧碰撞造山作用密切相关,这一过程导致了岩浆的上升和侵入。岩体的主微量元素特征表明,其源区可能经历了斜长石的分离结晶作用,形成了具有特定地球化学特征的岩石。沙红山岩体的形成是古亚洲洋闭合过程中的一个重要地质事件,其岩石成因反映了区域构造演化与岩浆活动的相互作用。因此,沙红山岩体的岩石成因可以解释为在古亚洲洋闭合背景下,由板块碰撞造山作用引发的岩浆活动所形成的结果。
结合区域上来看,研究区内发育多期的岩浆活动,并不是孤立的岩浆事件,通过近年来的不断研究,越来越多的证据表明北山地区与古亚洲洋闭合有关的造山作用发生在二叠纪—早三叠世,于中—晚三叠世进入后造山环境,这是基于北山造山带西段大区域范围缺失三叠纪的沉积记录或局部发育磨拉石建造所反映强烈隆升作用提出的(左国朝等,1990;袁禹,2019;李敏等,2019)。北山西侧相邻的中南天山地区发现三叠纪的高压一超高压榴辉岩,而在东侧相邻的内蒙古地区发育三叠纪的同碰撞花岗岩。北山地区上二叠统为陆相火山岩(如方山口组)和陆源碎屑岩建造,如红岩井组具残留盆地建造特征,说明该地区初始碰撞可能发生于早二叠世末(李敏等,2019;赵鹏彬等,2019)。这些证据表明,北山地区最终碰撞造山作用应大体发生在晚古生代晚期,并有可能持续到早中生代初。北卧虎山正长花岗岩体、黑石山东二长–正长花岗岩体与区域构造线展布方向一致,同时也与北侧汇聚岛弧边界大致平行,其成岩时代大致相近,符合构造活动的规律(修群业,1999)。这印证了沙红山岩体正长花岗岩和花岗斑岩经历了同一时期的造山运动和古亚洲洋的闭合过程,在时空上是属于同一时代的产物。
甘肃北山地区古生代主要经历3个构造演化阶段:①长城纪蓟县纪为古陆裂解及洋盆扩张阶段;②志留纪泥盆纪为板块俯冲及碰撞造山阶段;③石炭纪二叠纪为陆内裂谷阶段(左国朝等,1990;杨合群等,2006;袁禹,2019)。北山造山带南缘区域岩浆活动强烈,侵入岩极为发育,以加里东期中酸性、华力西期中酸性侵入岩、印支期酸性侵入岩为主,构成小岩基或岩株(杨合群等,2009;王二腾等,2022)。根据岩体侵入地层的时代、同位素测年资料、岩体的空间展布及穿插关系、变质变形等特征。研究区区域上北侧在晚石炭世末哈萨克斯坦板块和塔里木板块以弧一弧碰撞的方式发生碰撞造山,结束了红石山–百合山–蓬勃山大洋及板块演化格局,早二叠世进入板内演化阶段,主要形成板内裂谷环境(王廷印等,1993;杨建国等,2012)。受此次碰撞造山的远程效应影响,区内由北向南经历了后造山期构造活动(王廷印等,1993)。
为了判别沙红山岩体的构造环境,笔者利用Rb-Y+Nb,Ta-Yb,Rb-Yb+Ta,Nb-Y等构造判别图(图7),所有判别图落入至同碰撞火山弧花岗岩和板内花岗岩区域。结合区域构造演化。研究发现,沙红山岩体整体表现为亏损高场强元素Ba、Ta、Nb、Ti、P等,与造山带弧岩浆作用形成的钙碱性系列岩石特征相似,岩体具有显著的Nb、Ta亏损,指示其壳源的性质。沙红山岩体稀土总量偏低,变化范围较小,轻稀土总量明显高于重稀土总量,球粒陨石标准化曲线明显右倾,LaN/YbN值为7.93~9.81,平均值为8.82。轻重稀土分馏较为明显;样品具有明显的Eu负异常。目前越来越多的证据表明,北山地区发生在二叠纪—早三叠世的造山作用和古亚洲洋闭合联系紧密。综合判断认为古亚洲洋在早二叠世的构造演化阶段应该属于俯冲–碰撞环境。在晚石炭世调查区碰撞挤压造山,至晚石炭世末,主要造山阶段结束,早二叠世早期,区内进入后碰撞拉伸环境,但造山作用尚未结束,局部存在短暂的挤压应力。沙红山岩体具有很低的Sr与高Yb特征,这指示地壳减薄即拉伸的地壳环境,与石炭纪至晚二叠世之前处于板内裂谷环境观点一致。综上所述,笔者认为沙红山岩体形成于板内构造环境。
(1)沙红山岩体具有肉红色花岗斑岩和肉红色正长花岗岩两种岩性的花岗质岩石。锆石U-Pb同位素研究表明,两种岩性的锆石U-Pb年龄加权平均值分别为(294.7±4.0)Ma、(284.2±4.0)Ma,表示沙红山岩体属于早二叠世岩浆活动的产物。
(2)沙红山花岗岩体属于钙碱性–高钾钙碱性系列的花岗质岩石,肉红色花岗斑岩具A型花岗岩特征,肉红色正长花岗岩具有I型花岗岩特征,岩浆源区指示花岗岩的源区主要为下地壳,可能有少量的幔源物质混入。
(3)构造环境判别显示该岩体形成于拉伸及地壳减薄的板内裂谷环境,形成于早二叠世后碰撞伸展环境,为北山南带于早二叠世晚期进入后碰撞裂谷阶段提供了依据。

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doi: 10.12401/j.nwg.2025077
  • 接收时间:2023-06-13
  • 首发时间:2026-09-16
  • 出版时间:2026-06-20
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  • 收稿日期:2023-06-13
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    1中国地质调查局西安矿产资源调查中心,陕西 西安 710054
    2中国地质大学(北京) 地球科学与资源学院,北京 100083
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2种不同金属材料的力学参数
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species
占总种数比例
Percentage of
total species (%)
属
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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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