摘要
渔塘铅锌矿集中区为湘西北最具找矿潜力的铅锌成矿区,赋存于寒武系下统清虚洞组厚大的碳酸盐岩中。矿化带延伸与藻礁浅滩相带一致。矿体具多层性,呈缓倾斜的整合层带状产出。矿石以锌为主,铅锌共生,具有一定分带现象。矿石为微晶状、细晶状及胶状等结构。成矿物质主要来源于藻类及碳酸盐泥对Pb2+、Zn2+离子的吸取。稳定同位素资料表明,本区铅主要为上地壳铅,硫源主要来自碳酸盐岩系的硫酸盐。矿床成因属于沉积成岩矿床类型,兼有成岩后期矿床性质。找矿应主要沿藻礁浅滩相拓展深部第二空间的潜力和矿带东延地带进行,结合构造-地球化学分析,以探查隐伏矿床为主。
The Yutang Pb-Zn deposit shows great potential for ore exploration in western Hunan Province.It occurred in the carbonate rock of Qingxudang Formation of Lower Cambrian,where the extending mineralized belt coincides with the algae reef bank facies zone.The ore bodies are of multi-layers with gentle dipping and conformable beds.They are dominated by Zn and coexisting Pb-Zn,showing zonation to some extent,and microcrystal,finecrystal and gel textures.The ore-forming materials came from Pb2＋ and Zn2＋ ions absorbed by algae and carbonated mud.Stable isotope data indicate that the lead （Pb） of this area is mainly from the upper crust.The sulfur （S） mainly originates from the sulphate of the carbonate rock series.Therefore the deposit genesis is sedimentation-diagenesis type with the nature of post-diagenesis.The further prospecting should be focused along the eastward extending part of the algae reef bank facies belt.And concealed deposits will be the primary target for exploration based on combination of structural and geochemical analyses.
出处
《地质与勘探》
CAS
CSCD
北大核心
2011年第2期251-260,共10页
Geology and Exploration
关键词
沉积相
铅锌矿
矿床特征
成因
渔塘
湖南
sedimentary facies
Pb-Zn deposit
deposit feature
genesis
Yutang
Hunan Province
