澜沧县大黑山铅锌多金属矿矿石特征及矿床成因

Ore Characteristics and Genesis of the Daheishan Pb-Zn Polymetallic Deposit in Lancang,Yunnan

云南省澜沧县黑山矿区位于三江成矿带南段,处于昌宁-孟连裂谷南段,成矿背景优越。通过地质详查工作,大黑山矿区发现铅锌矿体3条,矿石矿物主要有氧化铅、氧化锌、闪锌矿、方铅矿、金、银黄铁矿、黄铜矿、软锰矿、褐铁矿等,脉石矿物主要有石英、方解石、富锰方解石等。矿石结构主要为它形粒状结构,次为交代残余结构、充填交代结构、交代星状结构、它形填隙结构,矿石构造为角砾状构造、浸染状构造、脉状构造。通过对大黑山矿床地质特征研究,成因为中低温岩浆热液矿床。

The Daheishan Pb-Zn polymetallic deposit consists of 3 Pb-Zn orebodies.Its ore is composed of ore minerals such as lead oxides,zinc oxides,sphalerite,galena,native gold and native silver,pyrite,chalcopyrite,pyrolusite,limonite and gangue minerals such as quartz,calcite,manganese-rich calcite.The ore has xenomorphic granular texture,metasomatic relict texture and infilling-metasomatic texture,brecciated structure,disseminated structure and vein structure.The deposit should be a meso-low temperature magmatic hydrothermal deposit.