摘要
从江县南加花岗岩类包括似斑状花岗岩及二长花岗斑岩。本文论述了它们的地质地球化学特征 ,并对其形成的构造环境及与成矿作用的关系进行了初步的分析。 ( 1)似斑状花岗岩类具S型花岗岩的特点 ,这可能形成于先封闭“弧后盆地碰撞带” ;( 2 )二长花岗斑岩既具有Ⅰ型花岗岩的某些特点 ,也有S型花岗岩的一些特点 ,可能属碰撞后形成的钙碱性岩石 ;( 3)似斑状花岗岩类与钨锡矿化关系密切 。
Nanjia granitic rocks in Congjiang county have similar porphyritic granite and monzonitic granophyre. The following this paper presents their geology and geochemistry, and initially analyses the relationship between the forming structural surroundings and metallogenesis: 1) Similar porphyritic granite formed in early intact 'collision belt of solitary basin' possess the characteristic of S_type granite; 2) monzonitic granophyre possess either I_type granite or S_type granite in certain characteristic, and belong to calc_alkaline rocks; 3) Similar porphyritic granitic rocks have strongly relationship with W_Sn mineralization, and monzonitic granophyre is related to Cu mineralization.[WT5HZ]
出处
《贵州地质》
2000年第3期160-165,175,共7页
Guizhou Geology
关键词
花岗岩类
地质
地球化学
构造环境
成矿作用
granitic rocks
geology
geochemistry
structural surroundings
metallogenesis
Guizhou
