Rb-Sr Dating of Sphalerites from the Lengshuikeng Ag-Pb-Zn Deposit, Jiangxi, and Its Geological Significances
详细信息
- 责任者：Xu Yigan (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Wu Ganguo
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(5)
- 关键词：银矿 ; silver ores ; 铅锌矿床 ; lead-zinc deposit ; 铷—锶计时 ; Rb-Sr dating ; 江西 ; Jiangxi Province
- 页码：p.621-633
- 图表：illus., 2 tables, 127 refs.
- 分类号：1001
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
The Lengshuikeng ore field in Jiangxi Province is one of the most important Ag-Pb-Zn deposits in northern Wuyi Mountains , China.It ’ s a typical porphyry Ag-Pb-Zn deposit in the world , as well as volcanic sedimentary-hydrothermal reworked deposit are quite unique and rare , and therefore worthy of detailed research.Mineralization age from 40 Ar / 39 Ar age of sericite is consistent with the emplacement age of 162～155 Ma from the ore-bearing porphyry , indicating that the deposit formed on early stage of mineralization age.Rb-Sr dating of sphalerite yielded an isochron age of 126.9±7.1Ma , which represents the late stage of mineralization age.Formation of the large and super-large deposits in the Lengshuikeng ore field constrain is not only restricted by the tectonic regime transformation of the intracontinental setting in Eastern China , but also affected by long-term and multiple stage mineralizations.
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