摘要
小草坝白钨矿床是近年新发现的大型层控型白钨矿床,位于上扬子西缘成矿带,但该带中钨矿床较少,该矿床的研究将为区域上钨矿床的新发现提供有益的借鉴。通过对矿区钻孔、填图、分析测试等数据的综合研究,发现矿床产于岩体外接触带的透辉长英质角岩带内,矿体产状与地层基本一致,主矿体与花岗岩体不是直接接触,具明显的层控特征。初步认为,小草坝钨矿床是在中-上三叠统侏倭组具有较高的初始钨丰度的基础上,后经燕山期岩浆活动的叠加改造作用下成矿的,其成因属于沉积-改造型层控白钨矿床。
Xiaocaoba tungsten deposit is a large tungsten deposit newly discovered in recent years,It is located in the western rim of the Yangzi plate,but there are few tungsten deposits in this belt. The study of this deposit will provide useful reference for the new discovery of regional tungsten deposits.Through the comprehensive research on the data of drilling,mapping,analysis and testing in the mining area,it is found that the deposit occurs in diopside-felsic-hornstone belt in the outer contact zone of the rock mass,the occurrence of the ore body is basically the same as that of the stratum. The main ore body is not in direct contact with the granite body and has obvious stratabound characteristics.The mineralization is on the basis of the high initial tungsten abundance of the middle-upper Triassic Jurassic,and the formation of thermal events in the later period,especially the superimposition and transformation of the Yanshanian magmatism. The reason of this is the sedimentary-modified layer-controlled scheelite bed.
作者
宋立强
宋仲科
燕长海
戴中强
SONG Liqiang;SONG Zhongke;YAN Changhai;DAI Zhongqiang(Henan Institute of Geological Sciences,Zhengzhou 450007;Henan Key Laboratory for Metallogenetic Process of Metal Mineral Resource and Resource Utilization,Zhengzhou 450007;Team No.1,Henan Bureau of Coal Geology,Zhengzhou 450007;Henan Institute of Geological Survey,Zhengzhou 450007;China Titanium Chemical Group Co.Ltd,Luanchuan 471500)
出处
《矿产勘查》
2020年第5期944-953,共10页
Mineral Exploration
关键词
白钨矿床
层控
沉积-改造
小草坝
四川
Tungsten deposit
Stratabound
Sedimentary reformation
Xiaocaoba
Sichuan Province
