摘要
本区金矿化产于太古界结晶基底之上的中元古界熊耳群陆相火山岩中。成矿断裂集中分布在 4条带上 ,断裂构造具多期活动特征 ,存在两类不同的变形。韧性变形在宏观上表现为强片理化带 ,显微构造十分发育 ;脆性变形具张性特征 ,与矿化关系密切。本文对这两类变形的产物———糜棱岩和同生石英脉的显微构造、地球化学特征和形成机制。
Gold mineralization in the study area is hosted in continental volcanic rocks of Middle Proterozoic, Xionger Group overlying the Archean crystalline basement.Ore-hosting faults are concentrated in four tectonic zones and characterized by multistage activities.There exist two kinds of deformation in the fault zones. Ductile deformation macroscopically is expressed as intense schistosity zones and microstructures are well developed.Brittle deformation shows tensional character and is closely related with gold mineralization.This paper expounds results of the detailed study of the products of the two kinds of deformation--mylonite and syngenetic quartz vein in aspects of microstructures,geochemical characteristics,the formation mechanism,as well as the gold-bearing characteristics of fault zones.
出处
《铀矿地质》
CAS
CSCD
2002年第2期89-96,共8页
Uranium Geology
关键词
含金断裂带
韧脆性变形
显微构造
同生石英脉
断裂构造
糜棱岩
形成机制
金矿化
gold-bearing fault zones
ductile and brittle deformation
microstructure
syngenetic quartz vein
northern slope of Xionger Mountain
