摘要
成矿物质来源是研究矿床成因的关键问题之一，而地质体(地层和岩浆岩)成矿元素的含量高低是探讨成矿物质来源的基础。为了研究白牛厂超大型银多金属矿床主要成矿元素特征，本文系统测定了外围赋矿地层以及矿区花岗岩和花岗斑岩的成矿元素(Ag、Pb、Zn、Sn)含量，结果表明，Pb、Zn主要来源于矿区花岗岩，寒武系及下伏基底地层可能也提供了部分成矿物质，特别是Zn；由于矿区外围赋矿地层的Sn含量远低于Pb、Zn的含量，也远远低于地壳克拉克值，因此推测，Sn主要来源于花岗岩浆；Ag则主要来源于赋矿地层，花岗岩对其进行了后期的改造作用。
Source of mineralizing materials is one of the key questions for genetic study of ore deposit. Content of mineralizing elements in geologic body （stratum and granite） is the base to discuss the source of mineralizing materials. In order to study the characteristics of mineralizing elements in Bainiuchang ore deposit, we systematically measured the aboundances of mineralizing elements （Ag, Pb, Zn and Sn） in the external stratum, internal granite, and granite-porphyry respectively in the Bainiuchang region. The results indicate that Pb, Zn derive mainly from the granite. Cambrian and substratum also provided some mineralizing materials,especially Zn. The content of Sn of the external stratum is far less than the content Pb, Zn of external stratum and crust Clarke value. Thus,it is implyed that Sn derive mainly from granite, and Ag derive mainly from stratum and been modified by late granitic magmatism.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2005年第4期327-332,共6页
Bulletin of Mineralogy, Petrology and Geochemistry
关键词
滇东南
白牛厂
银多金属矿床
成矿物质
southeastern Yunnan
Bainiuchang
Ag polymetallic ore deposits
mineralizing malerial
