Geochronology of layered mafic intrusions from the Pan–Xi area in the Emeishan large igneous province, SW China

被引：12

作者：

Hong Zhong

Wei-Guang Zhu

机构：

[1] Chinese Academy of Sciences,State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry

来源：

Mineralium Deposita | 2006年 / 41卷

关键词：

Geochronology; Layered intrusions; Emeishan large igneous province; Ni–Cu–PGE mineralization; China;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Panzhihua–Xichang (Pan-Xi) area hosts mafic/ultramafic intrusions, which are part of the Permian Emeishan large igneous province. Some of these intrusions host giant Fe–Ti–V deposits and minor Ni–Cu–PGE mineralization. In the present study, zircon U–Pb ages of 259.3±1.3 and 260.7±0.8 Ma have been obtained from the giant Fe–Ti–V ore-bearing Hongge and the unmineralized Binggu intrusions, respectively, by isotope dilution thermal ionization mass spectrometry method. In combination with the ages of other ore-bearing intrusions, this age shows that these mafic/ultramafic intrusions were emplaced at ca. 260 Ma. The Hongge and Binggu intrusions cut the lower part of the rapidly deposited Emeishan flood basalt sequence but no further into the upper volcanic sequence in the Pan-Xi area. Thus, emplacement and mineralization of the mafic/ultramafic intrusions were almost contemporaneous with the eruption of the Emeishan flood basalts during a relatively short time span.

引用

页码：599 / 606

页数：7

共 121 条

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