摘要
通过对黑龙江金厂金矿床和河北蔡家营铅-锌-银矿床的对比研究,发现斑岩中包裹体的演化和成分特征反映了成矿流体的演化、成矿能力和矿床成因,对这类矿床的找矿评价也具有一定的参考价值。金厂金矿床中代表岩浆演化各个阶段的包裹体类型完全,且包裹体富含盐类、成矿物质和挥发组分,表明该区岩浆结晶分异作用完善、具有较强的成矿能力,能形成斑岩型矿床。而河北蔡家营铅-锌-银矿床,斑岩中只有硅酸盐玻璃包裹体和后期盐水溶液包裹体,反映该岩浆分异演化程度不高、分异作用极不完善。含盐度较高而且大量挥发组分的存在可能是后期热液活化萃取围岩成矿物质的重要因素。
Basing on the contrast studies on Jinchang gold deposit in Heilongjiang Province and Caijiaying Pb-Zn-Ag deposit in Hebei Province, the evolution and the component characteristics types of fluid inclusions in porphyry intrusions reflect evolution of ore- forming fluid, metallogenic potential and genesis. These results have some referenced value on the exploration and estimate of these deposits. The studies of fluid inclusions in Jinchang gold deposit which reflect each phase of magma evolution are complete, and the fluid inclusions are abundant in salt, metal mineral and volatiles which indicate that magma in this district have advantage on metallogenic potential and can form porphyry deposits. In the porphyry intrusion of Caijiaying Pb-Zn-Ag deposit in Hebei Province, there are only silica glass inclusions and saline aqueous inclusions of late phase which reflect that the degree of magma fractional crystallization is low. The inclusions are high in salinity and abundance volatiles are the important factor on activation and extraction of metallogenic matter by late hydrothermal fluid from wall rocks.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第9期2011-2016,共6页
Acta Petrologica Sinica
基金
国家自然科学基金项目(40573033和40143021)资助
关键词
包裹体
岩浆演化
结晶分异
金厂
Inclusion
Magma evolution
Fractional crystallization
Jinchang
