陕川丁家林—太阳坪含金脆-韧性剪切带特征  

Characteristics of brittle-ductile shear zone and gold mineralization on the Dingjialin to Taiyangping deposit,Shaanxi and Sichuan

作　　者：张秀琴[1] 邓建华[2] 董刚[3] 陈勇敢[3] 周遗军[1] 

机构地区：[1]武警黄金技术学校,湖北襄樊441002 [2]湖南省地质矿产勘查开发局,湖南娄底422917 [3]地质大队,湖南娄底422917

出　　处：《黄金地质》2003年第2期15-21,共7页Gold Geology

摘　　要：丁家林—太阳坪脆 韧性剪切带处于扬子地台、秦岭及松潘—甘孜褶皱带的结合部,出露长度大于10km,走向40～50°,以密集的褶曲带、劈理带、石英脉带单独或组合出现为标志。主要经历了2期变形,第1期脆 韧性剪切变形分2个阶段。S1阶段:茂县群地体发生低级变质并形成千枚理S1,分异石英脉q1;S2阶段:分异q2并发生金矿化,形成S2。第2期韧 脆性剪切变形发育韧 脆性断层S3,分异q3,并发育擦痕和阶步及强烈金矿化。晚期韧 脆性剪切作用叠加在早期脆 韧性剪切变形之上。丁家林—太阳坪金矿带的2期内生成矿作用与变形作用同步进行,其控、容矿构造为脆 韧性剪切变形组构。The Dingjialin to Taiyangping brittleductile zone is located in the junction area of the Yangtze platform,Qinling and Songpan　to Ganzi folded area,the exposed length is over 10 km,the trend is about 40～50°.It occurs as single or assemblage of dense folded belt,cleavage belt and quartz vein belt.There are mainly 2 periods of deformations in the zone.The first period is the brittleductile shearing deformation which can be divided into 2 stages, S1 stage:the lowgrade deformation took place in the Maoxian group terrain to form the phyllite S1and differentiate the quartz vein q1;S2 stage:q2 was differentiated,gold mineralization took place and S2 formed.The second period is the ductilebrittle　shearing deformation that developed the ductilebrittle shear fault S3,differentiated q3 and developed scratch and strong mineralization of gold.The late ductilebrittle shearing overprints the early brittleductile shearing.The mineraizations synchronize with the deformations in two periods in the Dingjialin to Taiyangping gold area.The orecontrol structure and host structure of the area belong to brittleductile shearing and deformation fabric.

关 键 词：内生成矿作用 变形作用 金矿带 容矿构造 控矿构造 脆-韧性剪切变形组构 陕西 四川 

分 类 号：P618.51[天文地球—矿床学]