江西九岭花岗岩类复式岩基锆石SHRIMP U-Pb年代学

钟玉芳; 马昌前; 佘振兵; 林广春; 续海金; 王人镜; 杨坤光; 刘强

Volume 30 Issue 6

Jun. 2005

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Article Navigation > Earth Science > 2005 > 30(6): 685-691

ZHONG Yu-fang, MA Chang-qian, SHE Zhen-bing, LIN Guang-chun, XU Hai-jin, WANG Ren-jing, YANG Kun-guang, LIU Qiang, 2005. SHRIMP U-Pb Zircon Geochronology of the Jiuling Granitic Complex Batholith in Jiangxi Province. Earth Science, 30(6): 685-691.

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SHRIMP U-Pb Zircon Geochronology of the Jiuling Granitic Complex Batholith in Jiangxi Province

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
3.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

Received Date: 2005-05-15
Publish Date: 2005-11-25

Abstract

Abstract

The Jiuling granitic batholith in Jiangxi Province crops out at the southern margin of the Yangtze block, and it is the largest Neoproterozoic granitoid intrusion in South China. The granitic complex has long been considered to consist of Jinningian granites, Hercynian granites and Yanshanian granites. In this paper, a SHRIMP U-Pb zircon geochronological study on this complex has been performed on the basis of detailed field research. The ²⁰⁶Pb/²³⁸U age of granite thought to be formed in the Neoproterozoic is (828±8) Ma, while the age of one sample from Ganfang granite thought to be formed in the Hercynian is (820±10) Ma, which suggests there is no Hercynian granite in this area. Combined with other new geochronological data, it seems that there is no proof of Caledonian-Hercynian magmatic activity within the Yangtze block, which may infer that there is no Caledonian-Hercynian intrusion in the interior of the Yangtze block. The age of a sample thought to be formed in the Yanshanian is (151.4±2.4) Ma, which confirms previous results. A few inherited zircons record Mesoproterozoic age information, which may represent the ages of the granite source rocks.
- Jiuling granitic complex,
- SHRIMP U-Pb zircon age,
- inherited zircon

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References

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SHRIMP U-Pb Zircon Geochronology of the Jiuling Granitic Complex Batholith in Jiangxi Province

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