沉积与特提斯地质2011，Vol.31Issue(1)：94-99,6.
甘肃天水夏家坪金矿地质特征
Geology and controls on the Xiajiaping gold deposits in Tianshui, Gansu
摘要
Abstract
The present paper deals with the geological background, geological characteristics and ore-controlling factors of the Xiajiaping gold deposits in Tianshui, Gansu. The Xiajiaping gold deposits is hosted in the Au-Ag-Cu-Fe-Pb-Zn metallogenic belt in the eastern part of the western Qinling reversed "S"-type arcuate structures, and controlled by the meta-clastic rocks and carbonate formation in the Lower Palaeozoic Liziyuan Group sedimentaryvolcanic rock series, and associated secondary brittle and brittle-ductile fracture zones. Spatially, the ore bodies tend to occur in strip-shaped and lenticular forms characteristic of expansion, contraction, branching, combination and discontinuity. The host rocks consist of meta-sandstone, meta-mudstone, cataclastic quartz veins and silicified breccias. The ore types are dominated by tectonically altered rocks, locally with quartz vein type and oxidized ores near the surface. In addition, the Ag, Pb and Zn mineralization are also well-developed, indicating a polymetallic sulfide type. The alteration and mineralization generally become weak and simple from the mineralization center outwards. The wall-rock alteration exhibits the zoning patterns. The mineralization can be classified into two main stages: early Au mineralization and late Ag, Pb and Zn mineralization.关键词
西秦岭/夏家坪金矿/反"S"弧形构造/地质特征Key words
western Qinling/ Xiajiaping gold deposit/ reversed "S -type arcuate structure/ geology分类
天文与地球科学引用本文复制引用
牛浩斌,丁俊,范文玉,廖震文,杨波..甘肃天水夏家坪金矿地质特征[J].沉积与特提斯地质,2011,31(1):94-99,6.基金项目
成都地质矿产研究所"甘肃天水夏家坪金矿勘查评价" （）
