辽北－吉南地区太古宙花岗岩－绿岩带地质地球化学  

GEOLOGY AND GEOCHEMISTRY OF ARCHEAN GRANITE-GREENSTONE BELTS IN NORTHERN LIAONING PROVINCE AND SOUTHERN JILIN PROVINCE

作　　者：李俊建[1] 沈保丰[1] 李双保[1] 毛德宝[1] 骆辉[1] 金文山[1] 

机构地区：[1]地质矿产部天津地质矿产研究所

出　　处：《地球化学》1996年第5期458-467,共10页Geochimica

基　　金："八五"国家重点黄金科技攻关项目

摘　　要：辽北－吉南地区是我国典型太古宙花岗岩－绿岩带出露区之一。根据其地质地球化学特征，本区绿岩带可划分为清原型和夹皮沟型，其形成的古构造环境分别为与现代岛弧的大陆边缘活动带和弧后盆地或大陆边缘裂谷相类似的裂谷型构造环境。与绿岩带有关的花岗质岩石可划分为三类：即片麻状花岗质杂岩体、花岗闪长岩和英云闪长岩底辟岩基以及钾质花岗岩。花岗岩－绿岩带的形成时代为２．５－２．９Ｇａ。The region between northern Liaoning Province and southern Jilin Province is one of the typical Archean granite-greenstone belts. In view of their geological and geochemical characteristics, the greenstone belts may be divided into two types, i, e.,Qingyuan type and Jiapigou type. The greenstone belts were formed possibly in a rift-type palaeo-tectonic setting, which is similar to that of the modern island arc-continental margin mobile zone or back arc basin. The granioid rocks associated with greenstone belts may be grouped into three associations: gneissic granitoid complex,granitoid diapri batholith and kaligranite. The granite-greenstone belts were formed at 2.5-2.9Ga.

关 键 词：花岗岩 绿岩带 太古宙 地质年代学 地球化学 

分 类 号：P588.121[天文地球—岩石学] P588.1[天文地球—地质学]