川西石棉地区含金剪切带的地球化学标志及矿物组合

GEOCHEMICAL CHARACTERISTICS AND MINERAL ASSEMBLAGE OF AURIFEROUS SHEAR ZONE IN SHIMIAN AREA, WESTERN SICHUAN

在扬子地台西缘的石棉地区 ,含金剪切带发育 ,并表现出明显的垂直分带特征 :由下而上依次为基底次级含金韧性剪切带→基底与盖层之间的含金滑脱韧性剪切带→盖层次级含金韧 -脆性剪切带 ,而各剪切带的特征各异 :地球化学标志 (由下而上 ;下同 )Pb、Zn→Te、As→Sb、As、S ;主要成矿元素Au、Pb(Zn)→Au→Au、Ag、Cu ;矿石中最常见矿物黄铁矿→黄铁矿→黝铜矿和黄铁矿。

The Shimian region at the western margin of the Yangtze platform is characterized by auriferous shear zones. It expresses notable vertical zoning characteristics. From small auriferous ductile shear zone in the basement→auriferous slip ductile shear zone between the basement and cover→small auriferous ductile\|brittle shear zone in the cover: geochemical characteristics from Pb, Zn→Te, As→Sb, As, S; major metallogenic elements from Au, Pb(Zn)→Au→Au, Ag, Cu; frequentmost minerals from pyrite→pyrite→kupferfahlerz and pyrite in ores.\;