铜陵舒家店地区志留纪地层中金矿的发现及其意义  

Discovery of Gold Deposit in the Silurian System in Shujiadian,Tongling Ore Cluster Region and its Significance

作　　者：段留安[1,2] 杨晓勇[1] 刘晓明 孙卫东[4] 

机构地区：[1]中国科学技术大学地球和空间科学学院,安徽合肥230026 [2]武警黄金第七支队,山东烟台264004 [3]华东冶金地质勘查局综合地质大队,安徽马鞍山243000 [4]中国科学院广州地球化学研究所矿物学与成矿学重点实验室,广东广州510640

出　　处：《大地构造与成矿学》2013年第2期333-339,共7页Geotectonica et Metallogenia

基　　金：安徽省国土资源科技项目"皖南地区金矿成矿条件与找矿预测研究(2011-K-08)";中国科学院知识创新项目(授权号:KZCX1-YW-15-3);国家自然科学基金项目(批准号:41173057)共同资助

摘　　要：通过对长江中下游成矿带铜陵矿集区舒家店地区的系统考察和研究,在杨冲里一带提出了不同于前人的找矿思路,目前经初步踏勘,在地表暂发现6条含金破碎蚀变带,取得了良好的地质找矿效果。布设13条探槽和1个坑道工程,只有2条探槽未见矿,矿(化)体走向63°～100°,最厚约20余米,金品位最高44.36 g/t,银最高126 g/t,铜最高7.68%,深部探矿工作正在加速施工中,初步估计该金矿资源前景在中型或以上规模。安徽省金矿主要以伴生金或共生金为主,而本次发现的舒家店地区的金矿则是以金为主,局部伴生银、铜、钼及锌矿。该区金矿脉主要产于志留纪地层中,受构造作用控制明显,具有构造蚀变岩型特征,不同于已知铜陵地区铜金矿类型,同时在铜陵地区志留纪地层中发现金矿脉也属首次,因此该矿的发现将进一步丰富该区的成矿理论,对于铜陵矿集区乃至长江中下游成矿带进一步探矿具有重要借鉴和指导意义。Based on systematic investigation of the Silurian strata around Shujiadian in the Tongling ore cluster region,we found a new type of gold mineralization in the Yangchongli ore field. Gold is occurred in the formation of Silurian clastic rocks,underwent strong alteration controlled by regional magmatic and structural activities. Geological prospecting engineering has achieved good effects,and the maximum mineralized vein is more than 20 m thick.Six fracture-alteration zones have been identified at present,the results of chemical compositions show that oreforming element contents in samples from 13 tunnel engineering slots can be up to of 44. 36 g / t( Au),126 g / t( Ag),7. 68%( Cu),respectively. We estimate that the size of this gold deposit can reach medium size by further drilling engineering. According to statistics,the gold deposits in Anhui province are mainly paragenetic types or accompanying types,few of them are independent ore types. Gold ores in Shujiadian are mainly enriched in gold,accompanied with silver,copper,molybdenum and zinc. The newly discovered gold deposit in Silurian System in Anhui province,which is obviously controlled by the regional structures with characteristics of structural-altered rock type mineralization,is much different from the known types of gold ore deposits in the Tongling ore cluster region,presenting new sight in the polymetal ore prospecting in the middle and lower Yangtze metallogenic belt.

关 键 词：铜陵矿集区 舒家店 志留系 蚀变岩型金矿 

分 类 号：P612[天文地球—矿床学]