Emplaced and Metallogenetic Times of Tongchang Diorities , Southern Shaanxi
详细信息
- 责任者：Wang Wei (Key Laboratory of Orogenic Belt and Crustal Evolution ; MOE ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Liu Shuwen
- 刊名：Acta Scientiarum Naturalium Universitatis Pekinensis
- 出版年：2011
- 卷期：47(1)
- 关键词：铀—铅计时 ; U-Pb dating ; 铜矿 ; copper ores ; 成矿期 ; metallogenic period ; 陕西 ; Shaanxi Province
- 页码：p.91-102
- 图表：7 illus., 2 tables, 25 refs.
- 分类号：0801
- issnNo：ISSN0479-8023
- isbnNo：CN11-2442/N
摘要
Tongchang dioritic pluton in Southern Shaanxi Province is located in the tectonic domain of the Mianxian-Lueyang-Yangpingguan triangle block, northern margin of Yangzi Craton, and consists mainly of diorite, quartzdiorite and granodiorite. Zircon grains separated from these rocks are dated using LA-ICPMS and SHRIMP U-Pb isotopic methods. The results indicate three intrusive stages of the Tongchang dioritic pluton, and early diorite emplaced at (879±7) Ma; middle quartz diorite at (848±5) Ma to (840±7) Ma, with copper ore-bearing albitite emplaced at (834±7) Ma, which is consistent with the crystallization age of quartz diorite within error range, and the last granodiorite at (824±5) Ma.
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