SHRIMP U-Pb zircon age of the Jinbaoshan ultramafic intrusion, Yunnan Province, SW China |
| |
Authors: | Yan Tao YanSheng Ma LaiCheng Miao and FeiLin Zhu |
| |
Institution: | (1) State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;(2) Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China;(3) Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China |
| |
Abstract: | SHRIMP U-Pb zircon dating gives ages of 260.6± 3.5 Ma and 260.7± 5.6 Ma for serpentinised wehrlite and plag-hornblendite in
the Jinbaoshan ultramafic intrusion, respectively. The results indicate that the Jinbaoshan intrusion was emplaced at ca.260
Ma and contemporaneous with the Emeishan continental flood basalts (ECFB), similar to other mafic-ultramafic intrusions of
the Emeishan large igneous province (LIP). The new ages provide a geochronological constraint on the origin of the Jinbaoshan
ultramafic intrusion. It confirms that the Jinbaoshan ultramafic intrusion belongs to the Emeishan LIP that formed at ca.
260 Ma.
Supported by Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX2-YW-111), National Natural Science
Foundation of China (Grant Nos. 40573020 and 40773033) and National Basic Research Program of China (Grant No. 2007CB411408) |
| |
Keywords: | zircon SHRIMP U-Pb age ultramafic intrusion Emeishan LIP Ni-Cu-PGE deposit |
本文献已被 SpringerLink 等数据库收录! |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |
|