Shesuo is located in the Shencha County in Tibet, which is a small scale Cu-skarn type multi-metal deposit Based on the detailed field work, microscope observation and rock identification, scanning eletronic microscope, energy spectrum instrument and ICP-MS analyses, characteristics of facieology and mineragraphy of the deposit were examined. The formation of the Shesuo deposit experience five stages: (1) magnetite + cobaltite + Bi + large amount of garnet + less amount of tremolite, genesis temperature up to 800℃; (2) euhedralcorallite (Crl) + molybdenite+ emplectite+ matildite+ aikinite + diopside; (3) wittichenite + Bi-bearing bomite + epidote + uralite + biotite; (4) copper pyrites + bomite + sphaler'te + epidote + chlorite, genesis temperature above 228℃ ; (5) magnetite with low genesis temperature + siderite + hessite + low quartz + flint stone. Main metallic minerals are copper pyrites, bomite, native copper, blue chalcocite, blue malachite, gelenite, sphalerite, molybdenite, native bismuth, wittichenite, emplectite, argentobismutite, emplectite, aikinite, carrollite, pentlandit, cobaltite and arsenojpyrite. The main valuable metal elements are copper, lead, zinc, bismuth and indium, the concentration of these elements up to the lowest level for exploration. Shesuo deposit is a typical bimetasomatism skarn deposit and prospecting work on the genesis of the deposit was poorly carried. This made the comprehensive utilization of these elements and improvement of the economic values possible.%舍索矿床位于西藏申扎县境内,为小型矽卡岩型富铜多金属矿床.本文在大量的野外地质调查、室内岩矿鉴定、扫描电镜与电镜能谱以及ICP-MS分析测试的基础上,查明其岩相学与矿相学特征.舍索矿床形成过程可分为5个阶段:(1)磁铁矿+辉砷钴矿+自然铋+大量石榴石+少量透辉石,形成温度达到800℃；(2)硫铜钴矿+辉钼矿+硫铜铋矿+硫银铋矿+针硫铋铅矿+透辉石；(3)硫铋铜矿+含铋斑铜矿+绿帘石+次闪石+黑云母；(4)黄铜矿+不含铋斑铜矿+闪锌矿+绿帘石+绿泥石,形成温度约228℃;(5)低温磁铁矿+菱铁矿+碲银矿+低温石英+燧石.主要金属矿物为黄铜矿、斑铜矿、自然铜、蓝辉铜矿、蓝铜矿、方铅矿、闪锌矿、辉钼矿、自然铋、硫铋铜矿、硫铜铋矿、硫银铋矿、硫铜(银)铋矿、针硫铋铅矿、硫铜钴矿、镍黄铁矿、辉砷钴矿和含钴斜方砷铁矿.主要的有用金属元素为铜、铅、锌、铋、铟等,它们的含量均达到最低工业品位的要求.该矿床为典型的双交代矽卡岩型矿床,区域上应重视对该类型矿床的找矿评价.
展开▼
