| 广西佛子冲铅锌r银1成矿带多元素富集特征及矿床成因 |
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| 引用本文：.2002.Discussion on Multi-element Enrichment Characteristics and Genesis of Fulichong Pb Zn (Ag) Metallogenic Belt, Guangxi[J].Mineral Deposits,21(1):74~82 |
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| 基金项目:广西自然科学基金(桂科自0135045)及广西“十百千人才工程”专项基金(编号：99225) |
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| 中文摘要:文章运用元素地球化学研究方法分析了研究区内岩浆岩、含矿岩系、硫化物矿物中元素的分布特征研究认为：佛子冲铅锌矿床中Ag，Se(富集于方铅矿中1和Cd(富集于闪锌矿中)具有较大的综合利用价值，矿床的形成与燕山期火山活动有关，不同类型矿床的成矿物质均为岩浆来源，在矿带东南部火山岩覆盖区有进一步找矿的潜力，花岗斑岩与炭质灰岩或英安质凝灰熔岩的交切处是找矿靶区。 |
| 中文关键词:铅锌矿床, 伴生银矿床, 矿床成因, 元素分布, 佛子冲 |
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| Discussion on Multi-element Enrichment Characteristics and Genesis of Fulichong Pb Zn (Ag) Metallogenic Belt, Guangxi |
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| Abstract:The Fuzichong Pb-Zn ( Ag) Metallogenic belt is a mediu m-large Pb-Zn ( Ag) concentrated area. In addition to Pb and Zn, there are many other ele ments concentrated in the orebodies , such as Cu , Ag , Cd, Se , Ga , In and Au. The multi-ele ment enrichment makes Fuzichong a very valuable metallogenic belt with the function of comprehensive utilization . Silver is not uniformly distributed, varying in the range of ( 53 ~ 104) × 1 0 -6 , with local enrichment . Ag , Cd, Se are very closely related to Pb , Zn in distribution. Ag and Se are mainly dispersed in galena [ Ag ( 293 ~ 2 048) ×10-6 ; Se ( 71 ~ 238) ×10-6],whereas Cd is mainly hosted by sphalerite [ Cd ( 3 900 ~ 6 740) ×10 -6]. Lead and zinc enrich ment is intimately associated with the carborF bearing mudstone, and mineralization is controlled by both the granite-porphyry (fracturesJ and the mudstone . The Pb-Zn deposits in the Fuzichong belt may be of volcanogenic genesis . All the active stages of Yanshanian ( Jl - i) volcanomagma (early stage middle- abyssal granodiorite , middle stage extrusive dacitic tufflava and late stage hypabyssal or sulrvolcanic granite-porphyry) possess the ore-forming conditions. The maximum enrichment of ore-forming elements in the late stage granite-porphyry suggests that there remains a great potential for exploration in the eastern southern part of the Fuzichong belt , where there occur extensive cover of dacitic tufflava and widely exposed granite- porphyry . |
| keywords:Leadzine deposits , associated Ag deposits , genesis , ele ment distribution, Fuzichong belt of Guangxi |
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