Geochemical Characteristics and Zircon Dating of Blasto-Gabrro from the South Jinshuikou Area, Eastern Kunlun
详细信息
- 责任者：Ren Junhu (State Key Laboratory of Continental Dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Zhang Kun
- 刊名：Journal of Northwest University
- 出版年：2011
- 卷期：41(1)
- 关键词：变辉长岩 ; metagabbro ; 铀—铅计时 ; U-Pb dating ; 昆仑山 ; Kunlun Mountains
- 页码：p.100-106
- 图表：7 illus., 2 tables, 31 refs.
- 分类号：0802
- issnNo：ISSN1000-274X
- isbnNo：CN61-1072/N
摘要
In this paper, the authors confirm the age of the Rodinia continent breakup in Eastern Kunlun outcrop. By geochemistry and LA-ICP-MS, the formation environment of the blasto-gabbro was distinguished and the age of the zircons from the blasto-gabbro was yielded. The geochemical study of the blasto-gabrro reveals that they are enriched in the large-iron-lithophile elements (LILE), and slightly depleted in LREE and HSFE (such as Nb and Ta), which obviously suggest that the rock formed in rift. Using LA-ICP-MS method of U-Pb age dating, it is the (796±41) Ma (MSWD=0.47) that represents the crystallized age of the blasto-gabrro. The age of the Rodinia continent breakup in Eastern Kunlun outcrop is (796±41) Ma (MSWD=0.47).
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