Geological Characteristics and K-Feldspar 40Ar/39Ar Dating of the Miaoling Gold Deposit in Songxian County, Henan Province
详细信息
- 责任者：Zhai Lei (No.1 Geological Surveying Party ; Henan Bureau of Geology and Mineral Exploration and Development ; Luoyang 471023 ; China) ; Ye Huishou
- 刊名：Geological Bulletin of China
- 出版年：2012
- 卷期：31(4)
- 关键词：金矿 ; gold ores ; 氩—氩计时 ; Ar-Ar dating ; 河南 ; Henan Province
- 页码：p.569-576
- 图表：4 illus., 1 table, 26 refs.
- 分类号：1001
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
///The Miaoling gold deposit in Songxian County of Henan Province is located in the Xiong’ershan-Waifangshan area on the south margin of North China Craton. The ore deposit is hosted in the Mesoproterozoic volcanic rocks of Xiong’er Group, along a NS-trending fracture zone. Ore bodies occur in layered and lenticular forms, and ores disseminated and stockwork structure with anhedral fine-grained texture and replacement texture. Hydrothermal alterations of the wall rock include silicification, K-feldspathization, sericitization, pyritization etc. Mineralizations show multi-stage characteristics and the gold deposit is of the fracture zone altered rock type. 40Ar-39Ar plateau age and isochron age of K-feldspar are respectively (121.6±1.2) Ma and (117.0±1.6) Ma, indicating that the ore deposit was formed in Early Cretaceous, identical in age with Qiyugou, Yaogou and other gold deposits in Xiong’ershan area. They therefore may be products of structure-magma-fluid activity in Early Cretaceous.