大兴安岭额尔古纳成矿带特征及金成矿条件探讨

额尔古纳成矿带处于西伯利亚板块东南缘蒙古—兴安造山带内，蒙古—鄂霍茨克断裂与得尔布于断裂之间，包括北部上黑龙江成矿亚区、中部额尔古纳成矿亚区和南部克鲁伦成矿亚区。区内13处岩金矿床(点)均与中生代岩浆活动有关，金矿形成于中生代(晚侏罗世—早白垩世)，金矿床具有北东成带，北西成行的分布特征。成矿物质来源以深源为主，有部分地壳物质的加入；成矿溶液是岩浆热液和大气降水的混合流体；成矿温度为200-300℃，矿床属中低温热液型金矿床。

Discussion on the Fetures of the Eerguna Metallogetic Belt and the Metallogetic Condition of Gold, Daxinganling

The Eerguna metallogetic belt lies on the Xing'an-Mongulia orogetic belt，which is on the South-east border of Siberlia Plate．And refers to the zone between the Mongolian-Okhotsk and Derbugan frature belts．It is composed of Upper Heilongjiang(depression)metallogetic subprovinces and Eerguna(uplift)metallogetic subprovinces and Kerulen(depression and uplift)metallogetic subprevinces．There are 13 rock gold deposits(point)related to Mesozoic magmatic activities，and the gold deposits in this area formed in Mesozoic(J3-K1)．Gold deposits in this area are distributed in beIf with northeast direction and in row with northwest direction．The mineralization materials mainly come from deep resources and a little from upper crust．The ore-forming fluid is the mixture of magmatic water and atmospheric water．The temperature of gold mineralization is 200-300℃．The deposit is a meso-epithermal gold deposit．