Zircon SHRIMP U-Pb Dating and Neoproterozoic Metamorphism of Kangding and Yuanmou Intrusive Complexes,Sichuan and Yunnan

To clarify the relationship of the metamorphic intrusions along the west margin of the Yangtze craton and their metamorphic history after crystallization, the petrochemical and trace element geochemical characters, zircon SHRIMP U-Pb dating, and the chemical compositions of coexisting hornblendes an...

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Bibliographic Details
Published in:Journal of earth science (Wuhan, China) China), 2009-12, Vol.20 (6), p.897-908
Main Author: 李大鹏 陈岳龙 罗照华 赵俊香
Format: Article
Language:English
Subjects:
Biogeosciences
Crystallization
Earth and Environmental Science
Earth science
Earth Sciences
Geochemistry
Geology
Geotechnical Engineering & Applied Earth Sciences
Igneous rocks
Metamorphic rocks
Metamorphism
Pb
Petrochemicals
Trace elements
云南
元谋
变质岩
四川
康定地区
新元古代
锆石SHRIMP
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Summary:To clarify the relationship of the metamorphic intrusions along the west margin of the Yangtze craton and their metamorphic history after crystallization, the petrochemical and trace element geochemical characters, zircon SHRIMP U-Pb dating, and the chemical compositions of coexisting hornblendes and plagioclases from Neoproterozoic metamorphic intrusions in Kangding （康定）, Sichuan （四川） Province, and Yuanmou （元谋）, Yunnan （云南） Province, were studied. Combined with the former published data, it is indicated that the Kangding granitic plutons and Yuanmou complex in the west margin of the Yangtze craton generally formed at the same period. Metamorphic event at ~700 Ma existed extensively, at least covering from Kangding area in Sichuan to the Eshan （峨山） area in Central Yunnan. Moreover, amphibolite facies may represent the peak regional metamorphic condition.
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-009-0076-2