摘要
银山银铅锌多金属矿是近几年来在该区域发现的中型以上的银铅锌多金属矿床,为地层-构造-岩浆综合控制型矿床。运用矿区的黄铁矿矿石S、Pb同位素示踪的方法探讨了矿床成矿物质来源。矿区黄铁矿和方铅矿的硫同位素组成δ34S值为-1.5‰~27.9‰,且硫同位素分布直方图中显示3种来源特征,指示成矿物质来源可能为海水、地层或岩浆。Pb同位素组成μ(^(238)U/^(204)Pb)值特征、Zartman构造模式、Δγ-Δβ成因分类研究表明,矿区矿石铅为幔-壳混源,指示物源主要来自于中生代岩浆热液,而非海底热液沉积物。综合表明银山银铅锌多金属矿床是中生代岩浆热液型矿床。
The Yinshan Ag-Pb-Zn polymetallic ore deposit is a recently-discovered and above, medium-sized deposit in Chun＇an, Zhejiang Province. This deposit is strictly controlled by the regional stratum-structure- magma. This paper attempts to discuss the sources of ore-forming materials by using the methods of sulfur and lead isotopic tracing. The study shows that the composition δ^34S in pyrite and galena has a range of --1.5%0--27.9%0 and apparently has three sources in the frequency histogram of the sulfur isotopic compo- sition, indicating that the ore-forming materials should be sourced from sea, strataand magma. The char- acteristics of t~ （^238 U/^204 Pb）, Zartman diagrams and Δγ-Δβ Aft diagram suggest that the lead has mixing sources of crust and mantle, suggesting that the sources of ore-forming are mainly from the Mesozoic mag- matic hydrotherm rather than seafloor hydrothermal sedimemts. Generally, Yinshan Ag-Pb-Zn polymetal- lie ore deposit is a Mesozoic magmatic hydrothermal deposit.
出处
《地质科技情报》
CAS
CSCD
北大核心
2017年第2期186-193,共8页
Geological Science and Technology Information
基金
公益性行业科研专项(201211013)
浙江省科技厅重大专项(2010C03004)
国家实验室开放基金项目(NRE1301)
关键词
银山
硫铅同位素
成矿物质
Yinshan
sulfur and lead isotopes
sources of ore-forming materials
