摘要
庐江县银塘凹地区位于长江中下游铁、铜成矿带中段边缘,滁州—庐江构造岩浆带南段。近年在该地区首次发现了成岩年龄在100 Ma左右的隐伏黑云母花岗岩体,在其接触带发现了钨钼多金属矿(化)体。详细分析了银塘凹矽卡岩型钨钼多金属矿床地质特征及成因,并进行了成矿预测。研究表明:(1)矿体主要分布于黄金凹—小金凹背斜核部,隐伏花岗岩与奥陶系碳酸盐岩的接触带内,受层间裂隙、接触带控制;(2)矿床成矿作用受燕山晚期岩浆活动控制,是我国东部中生代岩浆—构造—成矿系统演化的组成部分,矿床成因类型为与黑云母花岗岩体以及奥陶纪碳酸盐岩有关的接触交代型(矽卡岩型)钨钼多金属矿床;(3)采用矿产资源综合信息评价系统(Mineral resources assessment system,MRAS)进行了成矿预测,并圈定了2处矽卡岩型钨钼多金属矿找矿远景区,即银塘凹矽卡岩型钨钼多金属矿远景区、发火山矽卡岩型钨钼多金属矿远景区,前者矿体在深部及外围仍有一定的延伸,具有较好的找矿潜力。
Yintangwa area in Lujiang County lies at the middle fringe of Fe-Cu metallogenic belt along middle-lower Yangtze River,the southern section of Chuzhou-Lujiang tectonomagmatic belt. In recent years,is the first discovery of Wu-Mo polymetallic deposit in the contact zone of concealed biotite granite at about 100 Ma of the diagenetic age in Yintangwa area. Based on the geological working results of the mining area,the geological characteristics and genesis of Yingtangwa Wu-Mo polymetallic deposit are discussed,and the metallogenic potential of the area is studied. The study results show that：（1）ore-bodies are mainly distributed in the core of Huangjinwa-Xiaojinwa anticline,and the contact belt of concealed granite and Ordovician carbonate rock,they are controlled by interlayer fissure and contact belt;（2）deposit mineralization is controlled by magmatic activity in Late Yanshanian,it is the integral part of Mesozoic magmatic-tectonic-metallogenic system evolution in Eastern China,the deposit genesis is belongs to contact metasomatism（ skarn type） W-Mo polymetallic deposit,that is related to biotite granite and Ordovician carbonate;（3）based on mineral resources assessment system（ MRAS）,two prospecting prospect areas（ Yingtangwa skarn type Wu-Mo polymetallic deposit prospecting perspective area and Fahuoshan skarn type Wu-Mo polymetallic deposit prospecting prospect area） of skarn type Wu-Mo polymetallic deposit are delineated,among them,the ore-bodies in the former prospecting perspective area is still has a certain extension in the deep and periphery of the area.
作者
刘雨
李梦婵
朱梦菡
Liu Yu;Li Mengchan;Zhu Menghan(No.327 Geological Team,Bureau of Geology and Mineral Resources of Anhui Provinc)
出处
《现代矿业》
CAS
2018年第5期136-142,共7页
Modern Mining
基金
安徽省国土资源厅地勘基金项目(编号:2010-2-19)
关键词
钨钼多金属矿
深部找矿
黑云母花岗岩
地质特征
成矿预测
找矿远景区
Wu-Mo polymetallic deposit
Deep prospecting
Biotite granite
Geological characteristics
Metallogenic prediciton
Prospecting perspective
