甘肃省两当县大店沟金矿地质特征与找矿预测
Geological characteristics and prospecting prediction of Dadiangou Gold Deposit in Liangdang County,Gansu Province
艾忠林 1金孝文 2李伟良 3钱建利2
作者信息
- 1. 甘肃中金黄金矿业有限责任公司,甘肃 陇南 742400
- 2. 中国地质调查局西安矿产资源调查中心,陕西 西安 710100
- 3. 西北有色勘测工程有限责任公司,陕西 西安 710038
- 折叠
摘要
甘肃省两当县大店沟金矿处于北秦岭的构造带西缘,位于西秦岭成矿带柴家庄—吊坝子金多金属成矿亚带中.本文详细分析了大店沟金矿床地质特征、矿床成因、找矿标志及找矿前景.研究认为:大店沟金矿床主要赋存于震旦—奥陶系丹凤群木其滩组第二岩性段及第三岩性段,含矿岩性主要为绢云绿泥石英片岩,矿区严格受区域性韧性剪切带控制;大店沟金矿床断裂构造极其发育,其中北东向韧性剪切带与成矿关系密切,为成矿流体运移、沉淀提供了良好的空间,控制着矿体的产出状态;大店沟金矿处于韧脆性转换部位,深部成矿空间较大,矿床南西深部是后续找矿重点区域.
Abstract
The Dadiangou Gold Deposit in Liangdang County,Gansu Province,is situated on the west margin of the North Qinling tectonic belt,within the Chaijiazhuang-Diaobazi gold polymetallic metallogenic sub-belt of the West Qinling metallogenic belt.This paper provided a detailed analysis of geological characteristics,genesis,prospecting indicators and prospecting prospect of the Dadiangou Gold Deposit.The results showed that the Dadiangou Gold Deposit mainly occurs within the second and third lithologic sections of the Muqitan Formation,Danfeng Group,Sinian-Ordovician.The ore-bearing lithology primarily consists of sericulite-chlorite-quartz-schist,with the mining area being strictly controlled by regional ductile shear zone.The fault structure of Dadiangou Gold Deposit is highly developed,and the NE-trending ductile shear zone has a close relationship with mineralization,providing favorable conditions for ore-forming fluid migration and precipitation,and controlling the output state of the ore body.The Dadiangou Gold Deposit is located in the brittle-brittle transition zone,and has significant deep metallogenic potential.Therefore,the deep southwest area of the deposit is identified as a key area in future prospecting.
关键词
大店沟金矿/地质特征/找矿标志/找矿预测Key words
Dadiangou Gold Deposit/geological characteristics/prospecting indicator/prospecting prediction引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据