Home Journals Articles Updates About
CN
image
收藏切换
Pochengshan Granodiorite：the Product of Early Paleozoic Ocean Basin Subduction in the Beishanbei North Belt
收藏切换
Huaitao WANG1, 2, 3, Lei XU1, 2, 3, *, Shibo TUO1, 2, 3, Shengjiang LIU1, 2, 3, Haifeng ZHANG1, 2, 3, Wenyi TANG4
Northwestern Geology | 2026, 59(3) : 143 - 155
Less
收藏切换
Northwestern Geology | 2026, 59(3): 143-155
Pochengshan Granodiorite：the Product of Early Paleozoic Ocean Basin Subduction in the Beishanbei North Belt
Full
Huaitao WANG1, 2, 3, Lei XU1, 2, 3, *, Shibo TUO1, 2, 3, Shengjiang LIU1, 2, 3, Haifeng ZHANG1, 2, 3, Wenyi TANG4
Affiliations
  • 1Geoscience big data engineering research center of Gansu province, Lanzhou 730000, Gansu, China
  • 2Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China
  • 3Key Laboratory of Mineral Exploration, Gansu Province, Lanzhou 730000, Gansu, China
  • 4Chengdu University of Technology, Chengdu 610059, Sichuan, China
Published: 2026-06-20 doi: 10.12401/j.nwg.2025081
Outline
收藏切换

The Mazongshan arc is an important component of the Beishan orogenic belt, and its widely distributed Early Paleozoic intrusive rocks are of great significance for studying the early Paleozoic tectonic and magmatic evolution in the Beishan area. This study conducted petrological, geochemical, and zircon U-Pb geochronological studies on the Pochengshan granodiorite in the Mazongshan arc. The LA-ICP MS zircon U-Pb age is 451.4 ± 1.9 Ma (MSWD=1.2), indicating an early Late Ordovician period. The rock has high SiO2 (62.25-69.6%), Al2O3 (14.34-14.68%), Na2O+K2O (6.07-6.44%), and is a high potassium calcium alkaline, quasi aluminous granite. The distribution curve of rare earth elements shows a gentle right tilt, with light rare earth elements slightly enriched, enriched in large ion lithophilic elements (such as Rb, Ba, Th, K), and depleted in high field strength elements (such as Nb, Ta, Sr, P, Ti). The geochemical characteristics indicate that the Pochengshan granodiorite is a product of partial melting of the newly formed lower crust under the influence of mantle derived magma intrusion in a subduction environment, and the magma source area has been subjected to the alteration of subduction zone fluids and the addition of mantle derived components. It is a response to the northward subduction of the early Late Ordovician in the ancient ocean represented by the Hongliuhe Niujuanzi Xichangjing ophiolite.

Late Ordovician  /  granodiorite  /  zircon U-Pb dating  /  subduction  /  Pochengshan  /  Beishanbei north belt
王怀涛, 徐磊, 脱世博, 刘胜江, 张海峰, 唐文轶. 破城山花岗闪长岩：北山北带早古生代洋盆俯冲作用的产物. 西北地质, 2026 , 59 (3) : 143 -155 . DOI: 10.12401/j.nwg.2025081
Huaitao WANG, Lei XU, Shibo TUO, Shengjiang LIU, Haifeng ZHANG, Wenyi TANG. Pochengshan Granodiorite：the Product of Early Paleozoic Ocean Basin Subduction in the Beishanbei North Belt[J]. Northwestern Geology, 2026 , 59 (3) : 143 -155 . DOI: 10.12401/j.nwg.2025081
Appendix
Less
Year 2026 volume 59 Issue 3
133
64
Cite this Article
BibTeX
Article Info
doi: 10.12401/j.nwg.2025081
  • Receive Date：2024-04-08
  • Online Date：2026-09-16
  • Published：2026-06-20
Article Data
Affiliations
History
  • Received：2024-04-08
  • Revised：2025-05-20
  • Accepted：2025-05-20
Affiliations
    1Geoscience big data engineering research center of Gansu province, Lanzhou 730000, Gansu, China
    2Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China
    3Key Laboratory of Mineral Exploration, Gansu Province, Lanzhou 730000, Gansu, China
    4Chengdu University of Technology, Chengdu 610059, Sichuan, China
References
Share
https://castjournals.cast.org.cn/joweb/xbdz/EN/10.12401/j.nwg.2025081
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12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
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House