摘要
南岭中生代成锡花岗岩系花岗质岩浆多期或多阶段侵位和结晶的产物。空间上往往集中成群成带分布,构成多个复式岩基,明显受华夏和扬子两大地块接合部NE向深大断裂及NW向隐伏深大断裂的控制;中生代成锡花岗岩主要侵位于燕山期,成矿作用主要有两期,一是早期矽卡岩化导致锡的初步富集,二是晚期岩浆热液叠加形成了工业锡矿床。锡成矿作用与燕山期伸展背景下的大规模花岗岩浆活动密切相关。
Tin-mineralized granitoids are widespread in Nanling region and were crystallized from granitic magma of different crustal evolutional periods or stages. Spatially,the granitoids usually distribute in groups or belts and constitute several batholiths controlled by NE-striking deep-seated faults and NW-striking concealed deep-seated faults along the conjunct belt of the Cathay and Yangtze massif. The Mesozoic tin-mineralized granitoids in Nanling region mainly intruded during the Yanshanian period,and related mineralization endured early stage of skarnization which resulted in primary enrichment of tin and late stage of hydrothermal superimposed mineralization which play a key part in forming tin deposits of industrial value. Study shows that tin mineralization in the Nanling region is closely related to large scale granitic magmatism in a extensional setting during the Yanshanian period.
出处
《华南地质与矿产》
CAS
2005年第2期12-21,共10页
Geology and Mineral Resources of South China
基金
中国地质调查局国土资源大调查项目(121201033090).
关键词
燕山期花岗岩
锡矿床
成矿规律
南岭
Yanshanian granitoid
tin deposit
metallogenetic regularity
Nanling
