摘要
粤西金矿床分为构造蚀变岩型、石英脉型和变质岩型。赋金地层主要为云开群上亚群和寒武系八村群,它们具有较高的含金丰度,可作为本区金的矿源层。在区域变质或混合岩化作用下,矿源层中的金可能发生活化、转移并在局部富集。海西 印支期花岗岩有继承变质岩、混合岩的特征,分异演化程度不高,这对金成矿有利。
Gold deposits in the west Guangdong province are divided into altered cataclasite, quartz vein and metamorphic types. The Upper sub-group of Yunkai group and Bacun group may be the ore source beds which are characterized by higher Au abundance. Regional metamorphism or migmatization could play role in gold remobilization from the source bed and concentration at some localities. Hercynian-lndosinian granites are characteric of inheritble metamorphic rock and migmatite with less differentiation evolution. Such characteristics are favorable for Au ore formation.
出处
《地质找矿论丛》
CAS
CSCD
2004年第1期24-29,共6页
Contributions to Geology and Mineral Resources Research
关键词
粤西金矿床
地球化学
矿源层
岩浆岩
变质作用
Au deposits in west Guangdong Province
geochemistry
ore source bed
magmatite
metamorphism
