延边金苍—红光地区金矿成矿条件与成矿规律

Metallogenic condition and regularity of Jincang-Hongguang gold mineralization district in Yanbian of Jilin,China

金苍—红光地区为延边东部东西向构造火山岩浆岩带中重要的金矿化集中区段。通过调查研究其中九三沟金矿床发现,矿区成矿岩浆岩条件为次火山岩相石英闪长(玢)岩,其中隐爆角砾岩(筒)及外围裂隙中赋存着金矿(化)体;次火山岩(体)受东西向断裂(带)与南北向断裂交汇部位的火山机构中心控制,成为该地区重要的成矿构造条件。成矿次火山岩体(石英闪长岩)在东西向断裂构造带上,自西向东在与南北向断裂交汇部位具有近等间距分布的规律,并与区域化探金异常空间吻合。

Jincang - Hongguang gold mineralization district is an important part of transmeridional magmatic rocks belt controlled by structural volcanic in eastern Yanbian. By investigating and analyzing the Jiusangou gold deposit, the authors realized that, the main rocks related to metallogenic are quartz diorite or diorite-porphyrite, and there occur gold ore-bodies in the cryptoexplosion breccia tubes and the country rock cracks. The sub-volcanic rocks are dominated by volcano organization center which is around the crossing point of the transmeridional fractures （zone） and the meridional fractures, equidistant in transverse direction, and it is the important tectonic condition of mineralization in this area. The sub-volcanic rocks related to metallogenic are developed in the meridional fractures. There exists a rule for the rocks with equal distant each other from west to east, meanwhile it has a coincidence with Au anomalies by information of geophysical and geochemical exploration.