新疆西准噶尔成矿带斑岩型钼矿与斑岩型铜钼矿成矿条件对比分析  

A comparison of metallogenic conditions between porphyry molybdenum deposits and porphyry copper-molybdenum deposits in west Junggar,Xinjiang

作　　者：席晓凤 马珉艺 XI Xiaofeng;MA Minyi(China University of Geosciences(Beijing),Beijing 100083,China;Henan Geological Mining Group Zhonghao Construction Engineering Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]中国地质大学(北京),北京100083 [2]河南地矿集团中昊建设工程有限公司,河南郑州450000

出　　处：《中国矿业》2019年第A02期263-267,271,共6页China Mining Magazine

摘　　要：西准噶尔成矿带为中亚成矿域巴尔喀什成矿带的东延部分,是超大型斑岩型矿床的重要找矿潜力区。本文借助前人的研究成果,分别从矿床赋矿地层、成矿温度压力条件等方面,分析比对了该区苏云河钼矿、包古图铜(钼)矿、宏远钼(铜)矿和吐克吐克铜(钼)矿等4个斑岩型铜钼矿床的成矿条件差异。分析结果表明:该区域已发现的斑岩型钼矿与斑岩型铜钼矿均形成于晚石炭世末-早二叠世初西准噶尔成矿大爆发时期;斑岩型钼矿和斑岩型钼(铜)矿的赋矿岩体呈中酸性,而斑岩型铜(钼)矿的赋矿岩体呈中性;斑岩型钼矿和斑岩型钼(铜)矿的成矿温度较斑岩型铜(钼)矿床要高,且成矿压力和成矿深度也较大;斑岩型铜(钼)矿和斑岩型钼(铜)矿都存在向岩体内部和深部辉钼矿含量明显增加的现象。The west Junggar metallogenic belt is the eastern extension of the Balkhash metallogenic belt in the central Asian metallogenic domain.Based on previous research results,this paper analyzes and compares the metallogenic conditions of four porphyry copper-molybdenum deposits in this area,from the aspects of ore-hosting strata,metallogenic temperature and pressure conditions.The four porphyry copper-molybdenum deposits are Suyunhe molybdenum deposit,Baogutu copper(molybdenum) deposit,Hongyuan molybdenum(copper) deposit and Tuketuke copper(molybdenum) deposit.The porphyry molybdenum deposit and porphyry copper-molybdenum deposit in this region were formed during the great metallogenic explosion of west Junggar in late Carboniferous to early Permian.The host bodies of porphyry molybdenum ore and porphyry molybdenum(copper) ore are intermediate-acidic,while the host bodies of porphyry copper(molybdenum) ore are intermediate.The metallogenic temperature and pressure of porphyry molybdenum ore and porphyry molybdenum(copper) ore are higher than porphyry copper(molybdenum) ore,and the metallogenic depth is deeper than porphyry copper(molybdenum) ore.Both porphyry copper(molybdenum) ore and porphyry molybdenum(copper) ore show that the content of molybdenite is higher as the location is nearer to the center of the rock mass.

关 键 词：西准噶尔成矿带 斑岩型铜钼矿床 成矿条件 

分 类 号：P612[天文地球—矿床学]