湖南江东湾金锑矿床地质特征

江东湾金锑矿床位于雪峰山弧形成矿带西南缘，赋存在两条NE向区域性断裂挟持的上升复背斜的次级构造破碎带中，对其矿床成矿地质特征、控矿因素及成矿模式等方面分析，认为成矿物质具有多源性，成矿作用具有多阶段性，控矿构造具有多型式.

METALLOGENIC GEOLOGY OF JIANGDONGWAN GOLD ANTIMONY DEPOSIT IN HUNAN PROVINCE

The Jiangdongwan gold antimony deposit,located in the southwestern section of the Xuefengshan arcuate metallogenic belt,is contained in the secondary fracture zone of an anticlinorium,which is bounded and uplifted by two NE trending regional faults.Strata and structures control the deposit,which belongs to sedimentary mixed hydrothermal filling and metasomatic type.The ore forming substances is derived from the mixture of sedimentary rocks with hot brine water,metamorphic water and magmatic water.The Mobin formation of Gaojian group is the ore hosting horizon and source bed,which is consisted of silt slate,sericite slate and metamorphic fine sandstone or siltstone rich in pyroclastic substances.The silt slate and metamorphic fine sandstone/siltstone are relatively fragile and tend to produce fissures,thus they can supply with reservoir spaces.While the sericite slate is more plastic with less fissure,so that it is easy to form a seal environment for mineralization.The contents of ore forming elements in the strata respectively are:Au 200×10-9,Sb 10×10-6 and As 200×10-6.The studies on the metallogenic geology,ore controlling factors and mineralization model of the deposit show a multi sourced ore forming material,multistage mineralizing process and multi type of controlling structures.