摘要
安康—石泉北部金成矿带位于南秦岭早古生代裂谷盆地次级单元牛山—赤岩地垒,南北两侧分别以安康断裂和麻坪河断裂为界,典型金矿床有羊坪湾、黄龙、鹿鸣等。早古生代裂谷盆地以发育黑色岩系为特征,普遍沉积碎屑岩—碳酸盐岩夹火山岩,特别是浅变质志留系砂泥质岩和印支—燕山期脆韧性剪切带控制着金矿床的形成,前者提供金矿源层,后者促使含金热液运移富集成矿。该地区是金矿成矿带有利区段。
Gold ore mineralized zone of the Northern Ankang-Shiquan is located in the Niushan- Chiyan horst of the secondary unit in the Early Paleozoic rift basins of southern Qinling Mountains. The gold ore zone is bounded by Ankang Fault at the south and Mapinghe Fault at the north, contai- ning several gold mines such as Yangpingwan, Huanglong and Luming. The Early Paleozoic rift ba- sin is characterized by black rock series and wide distribution of sedimentary elastic rocks and car- bonate rocks with volcanic rocks. Gold deposits are subject to epimetamorphic pelitic-arenaceous rocks of the Silurian System and brittle-ductile shearing zones formed in the Indosinian-Yanshanian Phases, in which the former is the source bed of gold and the later formed channels for ore migration by thermal liquid. Based on analysis of gold metallogenic conditions, this area is propitious for gold mineralization with very possible for ore prospecting.
出处
《陕西地质》
2013年第2期47-52,共6页
Geology of Shaanxi
基金
中国地质调查局<1:25万南江市幅(I48C004004)
安康市幅(I49C004001)区域地质调查(修测)>项目(编号:1212010510406)
关键词
安康—石泉北部
金矿成矿
黑色岩系
脆韧性剪切带
Northern Ankang-Shiquan
gold mineralization
black rock series
brittle-ductile shear zone
