吉林省柳河县—安口镇韧性剪切带地质特征  

Geological features of ductile shear zone of Liuhe CountyAnkou Town in Jilin Province

作　　者：关灵芝 毕守业 尹勇前 

机构地区：[1]吉林省地质科学研究所,吉林长春130012 [2]吉林省大布苏国家级自然保护区管理局,吉林乾安131400

出　　处：《吉林地质》2015年第4期14-16,共3页Jilin Geology

摘　　要：韧性剪切变形变质作用是出现在地壳演化的不同历史时期和不同的构造背景下,包括造山带、大陆伸展环境、高压环境、克拉通等环境中都有韧性剪切变形变质发生。本区韧性剪切带是发生在克拉通演化的晚期,出现在柳河地堑与太古界岩层间,它是以韧性剪切为主,带内显微构造极发育,包括组合型变形结构和单矿物变形结构。岩石类型是以糜棱岩和糜棱片岩为主。在富林图解中表现一个压扁形椭球体,这是一条典型的退变质型韧性剪切带,对今后寻找韧性剪切带型金矿有着重要意义。Ductile shear deformation metamorphism occurred in the different historical periods and different tectonic settings, including the orogenic zone, Continental extensional environment, high pressure, craton environment and so on. The ductile shear zone is occurred late stage of the craton evolution, between Liuhe graben and Archean strata, it is dominated by ductile shear, with internal mierostructure developed, including combination deformations structure and monomineral deformation structure. The rock type is mainly mylonite and mylonite schist. In Fullin map display an oblate ellipsoid, which is a typical degeneration type ductile shear zone. That has great significance on searching for ductile shear belt type gold deposit in the future.

关 键 词：韧性剪切带 显微构造 糜棱岩 退变质 寻找金矿 

分 类 号：P542[天文地球—构造地质学]