青海黄矿山北石墨矿成矿地质背景及找矿前景分析

Analysis of metallogenic geological background and prospecting prospect of the graphiteore in the north of Huangkuangshan,Qinghai province

为了查明黄矿山北石墨矿床的成因类型、找矿标志及找矿前景,文中从黄矿山北石墨矿床区域地质背景、激电异常特征、矿床特征、矿石质量等方面进行了综合分析。结果表明:黄矿山石墨矿床赋矿围岩—金水口岩群大理岩组,其原岩中所含的碳质经过区域变质作用,形成透闪岩型晶质石墨矿石;再经动力变质、接触变质作用,晶质石墨进一步结晶富集形成鳞片状、叶片状晶质石墨矿石。认为黄矿山北地区具有良好的变质热液型石墨矿成矿地质条件,加里东期—印支期侵入岩为石墨矿的再次富集提供了热源,矿床成因类型为区域变质型层控矿床。

In order to find out genetic types of the graphite deposit,prospecting marks and prospect in the north of Huangkuangshan,we analyzed the regional geological background of the graphite ore deposit in the north of Huangkuangshan,the IP anomaly characteristics,deposit characteristics and ore quality. We studied the graphite deposit of ore rock-Jinshuikou group marble group in the Huangkuangshan. The carbonaceous matter contained in the original rock underwent regional metamorphism and formed lithofacific crystal graphite ore. By dynamic metamorphism and contact metamorphism,crystal graphite further enriched and crystallized to form scaly,lamellar crystal graphite ore. We think that the region in the north of Huangkuangshan has a good ore-forming geological condition of metamorphic hydrothermal type graphite ore. Caledonian period-indo-china epoch intrusive rocks provided the heat source for the second enrichment of graphite ore. Genetic type is stratabound deposits of regional metamorphism superimposed type dynamic metamorphism.