摘要
马曲砂金矿位于西藏东部昌都地区 ,地处著名的三江成矿区 ,阿尔卑斯 -喜马拉雅巨型造山带东段弧形转弯处。根据砂金矿床的地质特征 ,重砂矿物组合以及主要重砂矿物特征 ,认为该矿床是近源型砂金矿 ,其形成与位于砂金矿南的各贡弄斑岩型铜金矿床有关。砂金聚集于河漫滩地貌单元含泥砂砾层的下部 ,砂金矿体的大小、品位和稳定性明显受河谷河漫滩形状的控制。
The Maqu placer gold deposit is located in the Qamdo district of the Eastern Tibet. It lies in the famous “Sanjiang” metallogenic belt — the eastern part of the Alps Hymalayan orogenic zone. On the basis of the study of the geological characteristics of a placer gold deposit, and the heavy sand mineral composition as well as the major heavy mineral characteristics. The deposit is thought to be a proximal placer gold deposit and related to the Gegonglong porphyry copper gold deposit located in the south of the placer gold deposit. The placer gold concentrated in the lower part of the mud bearing sandy gravel of the overflow land. The dimensions , grades and stability of the ore bodies are obviously controlled by the shape of the overflow land in the river vally.
出处
《成都理工学院学报》
CSCD
2000年第3期328-330,共3页
Journal of Chengdu University of Technology
关键词
马曲
砂金矿床
地质特征
富集规律
Maqu
placer gold deposit
geologic characteristic
rules of concentration
