安徽省金矿成矿地质背景、主攻矿床类型及找矿区划

Geologic Setting of Metallization, Main Type of Ore Deposit and Regionalism of Prospecting of Gold Deposit in Anhui Province

安徽省地处华北板块、扬子板块和大别造山带3个Ⅰ级构造单元的接合部位,活动历史长,地质作用复杂多样,不同区域金属成矿差异巨大。按照成矿大地构造背景不同,将安徽省境内的金矿划分为皖北蚌埠、大别山、长江中下游和江南古陆东段等金成矿区带。阐述了各个成矿区带成矿地质背景、主攻矿床类型。根据各个金成矿区带成矿地质特征,水系沉积物地球化学异常,结合重砂信息,利用GIS系统,进一步圈定了不同级别的找矿远景区16处,其中A级7处,B级5处,C级4处。

Anhui Province lies in juncture place of three class I tectonic units as North China plate,Yangtze plate and Dabie orogenic belt.It has long history of movement, complicated and variety geologic process, and great differ- ences between different regions of metallization.Basing on different geotectonic setting,divided the gold metallogic regions of inner Anhui province into four metallogenicbelts, such as Bengbu of north Anhui, Dabieshan, middle and lower Yangtze River and east section of Jiangnan ancient land.It expounds geologic setting of mineralization and main type of ore deposits in metallogenic regions, separately.According to geological characteristics of mineraliza- tion, geochemical anomaly of stream sediment in each gold metallogic region, combining with placer information, using GIS system,circled sixteen prospecting prospective areas in different class,among which seven in Class A, five in Class B and four in Class C.