New Understanding of the Source of Ore-Forming Material and Fluid in the Shanggong Gold Deposit, East Qinling
详细信息
- 责任者：Hu Xinlu (Faculty of Earth Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; He Mouchun
- 刊名：Acta Geologica Sinica
- 出版年：2012
- 卷期：87(1)
- 关键词：金矿 ; gold ores ; 成矿物质来源 ; source of ore material ; 秦岭 ; Qinling Mountains
- 页码：p.91-100
- 图表：illus., 5 tables, 35 refs.
- 分类号：1001
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
The Shanggong gold deposit is typical of tectonic altered rock type gold deposit occurring in the Xiongér terrane,southern margin of the North China Craton.The isotopic data about this deposit were systematically analyzed and comprehensively summarized,and some new understanding about the source of ore-forming material and ore-forming fluid were achieved.The D-O-C isotopic system shows that the ore-forming fluid derived neither from the Yanshanian magmatic-hydrothermal solution nor from devolatilization of the Taihua,Guandaokou and Luanchuan groups,but from mantle or mantle-derived magma,and it evolved to meteoric water with development of mineralization.The S-Pb-Sr isotope ratios imply a mixing origin of the materials from crust and mantle,with the mantle and Taihua Group likely contributing partial metallogenic materials.In the Indochina period,the collision of the Yangtze and North China plates may result in the strong interaction between the crust and upper mantle,and drive the deep seated fluid to migrate upward.It is under this tectonic background that the Shanggong gold deposit formed.