摘要
本文在论述七宝山铜金多属矿床地质特征的基础上 ,从地层、构造、岩浆岩等方面系统阐述了成矿地质条件 ,从硫同位素铅同位素及包体地球化学等方面入手探讨了成矿物质来源 ,矿床硫同位素范围窄 ,δ34 S=( 1.8～ 5.6)× 10 -3 ,硫同位素组成以重硫型为主 ,接近陨石硫同位素组成。铅同位素 2 0 6Pb/ 2 0 4 Pb=18.2 91,2 0 7Pb/ 2 0 4 Pb=15.617,2 0 8Pb/ 2 0 4 Pb=38.642 ,为幔源铅。流体包裹体成分反映出成矿热液为岩浆热液 ,矿床成因为地洼区内多位一体的岩浆高中温交代—热液矿床。
Based on the geological features of the Qibaoshan Cu polymetal deposit, the paper discusses systematically the mineralization conditions including the stratigraphy, structure and igneous rocks. Sources of minerogenetic material are analysed with respect to sulfur and lead isotopes and fluid inclusion composition. Range of the sulfur isotope δ 34 S‰ is narrow δ 34 S= (1.87～5.6)×10 -3 and is close to aerolite sulfur composition, 206 Pb/ 204 Pb= 18.291, 207 Pb/ 204 Pb=15.617, 208 Pb/ 204 Pb=38.642. It is suggested that this deposit is a high middle temperature hydrothermal deposit in a diwa region.
出处
《大地构造与成矿学》
EI
CAS
CSCD
2000年第4期365-370,共6页
Geotectonica et Metallogenia
基金
国家自然科学基金资助(编号 49772152)
