西藏马攸木金矿床金银互化物的赋存状态

OCCURRENCE OF Au-Ag COMPOUNDS IN THE MAYOUMU GOLD DEPOSIT,TIBET

马攸木金矿床是西藏近年发现的首例规模较大、矿石品位富、金成色高的岩金矿床。作者通过对马攸木金矿床矿石组构、矿石共生组合及矿物特征研究发现,金银互化物主要有自然金、含银自然金、银金矿、自然银。载金矿物为黝铜矿、针铁矿、脆硫锑铅矿及石英;金银互化物的赋存形式主要为包裹体金、裂隙金及粒间金。金银互化物的形成、富集与热液成矿作用及表生风化作用关系密切。

Mayoumu gold deposit is the first magmatic gold ore deposit in Tibet with larger scale, rich grade and high quality. According to ore texture, ore para - generation and mineral characters, Au - Ag compounds include native gold, electrum and native silver. Gold - bearing minerals are tetrahedrite, goethite, jamesonite and quartz. Occurrence of Au - Ag compounds are mainly inclusion, fracture and intergranular gold. The formation of Au -Ag compound is related with hydrothermal mineralization and weathering effect.