西藏邦铺钼铜多金属矿床钼铜成矿元素迁移、沉淀机制分析  

Study on Mo,Cu migration and precipitation mechanism of Bangpu Mo-Cu Polymetallic Deposit,Tibet

作　　者：周雄[1] 温春齐[2] 周玉[1,2] 费光春[2] 张贻[1] 温泉[2] 岳相元[1] 

机构地区：[1]中国地质科学院矿产综合利用研究所,成都610041 [2]成都理工大学地球科学学院,成都610059

出　　处：《有色金属（矿山部分）》2013年第6期19-22,28,共5页NONFERROUS METALS(Mining Section）

基　　金：国土资源部公益性行业科研专项项目(201011013);"十一五"国家科技支撑计划项目(2006BAB01A04)

摘　　要：对西藏邦铺钼铜多金属矿床成矿元素的沉淀、迁移机制进行了探讨。研究结果表明,HMoO-4、Cu(H2S)(HS)2-是钼、铜在热液中的主要存在形式。受温度、压力降低、pH值增大、两种流体混合机流体沸腾等多种因素的影响,导致成矿流体中成矿元素Mo、Cu的络合物的溶解度降低,并伴随围岩蚀变,硫化物按相应的条件沉淀在相应的蚀变带中,从而形成了目前的矿床类型和规模。研究结果可以为进一步找矿提供参考。In this paper, the migration and precipitation mechanism of the ore-forming elements from Bangpu Polymetallic Deposit is discussed. It＇s found that the leading existence form of molybdenum and copper are HMoO4 and Cu（Hz S）（HS）z- in hydrothermal fluid. With the influence of the decline of temperature and pressure, the in- crease of pH value, as well as two kinds of [luid mixing and boiling, the solubility of Mo, Cu complexes in the ore- forming fluid is reduced, which is accompanied with wall rock alteration. Sulfide precipitated in the corresponding alteration zone, which formed the type and scale of this deposit. Meanwhile, this study also provides an indication for further prospecting.

关 键 词：迁移形式 沉淀机制 成矿元素 钼铜多金属矿床 西藏邦铺 

分 类 号：P618.4[天文地球—矿床学]