四川越西县约火山硫铁矿地质特征及矿床成因

THE GEOLOGICAL FEATURE AND GENSIS OF YUEHUOSHAN PYRITE DEPOSIT IN YUEXI,SICHUAN

四川越西县约火山硫铁矿,矿体呈层状、似层状赋存于震旦系灯影组一段(Z€d^(1))硅质白云岩夹硅质岩的层间破碎带中,矿体与围岩界线较为明显。成矿物质来源于火山碎屑岩和碳酸盐岩之间的古风化壳,在后期热液的交代过程中,矿物质富集并形成可供开发的工业矿体。该硫铁矿成因类型为热液充填交代型硫铁矿.

The orebody of Yuehoushan pyrite deposit inYuexi,Sichuan is bedded,stratoid in the interlayer fracture zone of Sinian Dengying Formation Member 1(Z∈d^(1))siliceous dolomitite with intercalation of silicalite.The boundary line between orebody and wall rock is clear..The metallohgenesis material is originated from the paleo-weathering crust between volcanic clastic rock and carbonate rock.In the later hydrothermal metasomatism,the ore material is concentrated and the commercial orebody is formed.It is a hydrothermal filling metasomatic pyrite deposit in genesis.