二密铜金矿控矿条件及靶区(矿体)预测  

Ore-controlling conditions and target (orebody) forecasting in Ermi cooper-gold deposit

作　　者：王建新[1] 臧兴运[1] 赵利刚[1] 谢海东[1] 任东辉[2] 

机构地区：[1]吉林大学地球科学学院 [2]吉林大学应用技术学院

出　　处：《黄金》2008年第2期9-13,共5页Gold

摘　　要：研究表明二密铜金矿主要控矿因素为松顶山复式火山机构。火山机构中心为闪长质次火山岩侵入,闪长质岩体边缘接触带附近发育寄生火山口(次一级),并充填晚期花岗质次火山小岩株,构成破火山机构环状构造(内环)。各矿段主要铜矿体即集中于花岗质岩体内及其附近,总体分布和方向又受接触带构造控制。该文结合区域成矿规律,通过成岩成矿关系研究表明,本矿床除铜矿外,还具有金的找矿前景。在此基础上,结合区内地球物理、地球化学特征,研究区共圈出Ⅰ级找矿靶区2处,Ⅱ级找矿靶区3处。It＇s sure that the main ore-controlling condition of the orebodies in Ermi copper-gold deposit is Songdingshan multiple volcanic apparatus by investigation. The multiple volcanic .apparatus＇ center locates in Songdingshan, controlled by the East-West and South-North trend cross structure. The center was intruded by early subvolcanic rock （diorite） ; subordinate volcanoes formed in the diorite contact belt, which were filled with late stage diorite subvolcanic laccoliths and formed the volcanic apparatus＇ circularity structure （inside circularity）. The main copper ore bodies concentrate in the gTanite-porphyries and its neighborhood, the distribution and direction of copper ore bodies are controlled by the contact belt. Combining with the regional metallogenic rule, researches show that there is not only copper but also gold mineralization prospect in the deposit. According to the geophysics and geochemistry exploration result, two Class Ⅰ and one Class Ⅱ prospecting targets are put forward.

关 键 词：复式火山机构 控矿条件 靶区预测 二密铜金矿床 

分 类 号：P618.51[天文地球—矿床学]