Sr and Pb isotopic constraints on ore formation of the copper deposits in bikou-group rocks, Qinling area, China

摘要

Bikou Group comprises spilite and keratophyre, which are lower-grade (greenschist facies) metamorphosed and interbedded by main basic rocks at the bottom and acid rocks on the top. Some copper deposits and ore spots such as Damaoping, Faziba and Yangba have been found inspilite stratum. Because researches have not been well carried out on geology of these ore deposits, some basic problems concerning ore source, characteristics of ore-ofrming fluid and mineralization age, etc, remain unsolved. This paper mainly discusses the mineralization mechanism and mineralization age.