TheageoftheGaojiacunmafic-ultramaficintrusivecomplexintheYanbianarea,SichuanProvince:GeochronologicalconstraintsbyU-Pbdatingofsinglezircongrainsand40Ar/39Ardatingofhornblende

被引：6

作者：

ZHU Weiguang

DENG Hailin

LIU Bingguang

LI Chaoyang

QIN Yu

LUO Yaonan

LI Zhide

PI Daohui Open Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang China Graduate School Chinese Academy of Sciences Beijing China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China Geological Team Bureau of Metallurgical Geology and Mineral Exploration Panzhihua China Bureau of Geology and Mineral Resources of Sichuan ProvinceChengdu China China University of Geosciences Wuhan China Correspondence should be addressed to Zhu Weiguang ^{[550002
,100039
,100029
,601
,617027
,610081
,430074
]}

机构：

来源：

ChineseScienceBulletin | 2004年 / 10期

关键词：

mafic-ultramafic intrusive complex; geochronology; Gao-Jiacun;

D O I：

暂无

中图分类号：

P597 [同位素地质学与地质年代学];

学科分类号：

070902 ;

摘要：

<正> The Gaojiacun mafic-ultramafic intrusivecomplex in the Yanbian area, Sichuan Province, is a strati-form intrusive body that has undergone intensive magmaticdifferentiation. This intrusive body involves two magmaticaccumulating cycles. Systematic U-Pb dating of single zircongrains and 40Ar/39Ar dating of hornblende were conducted,and the results showed that the age of hornblende gabbro,which was formed at the main phase of intrusion of the Gao-jiacun intrusive complex, is 840±5 Ma, casting doubt on theconcept of "Yanbian Ophiolite". It is believed that the for-mation of the Gaojiacun intrusive complex seems to be re-lated to a super-mantl3 plume underneath the su-per-continent Rodinia. The above research results are helpfulfor us to get a better understanding of the characteristics ofNeoproterozoic tectonic evolution of the Yanbian area inSichuan Province.

引用

页码：1077 / 1085

页数：9

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