安徽省嘉山管店—全椒龙王尖断裂的厘定和构造岩透射电镜分析及地质意义  

Verification of the Guandian-Longwangjian Fault and TEM Analysis of Mylonites and Its Geological Significance

作　　者：黄德志 邱瑞龙[2] 刘德良[1] 杨晓勇[1] 徐祥[2] 

机构地区：[1]中国科学技术大学地球与空间科学系,合肥230026 [2]安徽省地质科学研究所,合肥230001

出　　处：《地质论评》2000年第1期58-63,T001,共6页Geological Review

基　　金：安徽省地质矿产局重点找矿项目;国家"九五"重点科技攻关项目 (95110)

摘　　要：嘉山管店—全椒龙王尖断裂表现为多条蚀变剪切带,镜下碎斑旋转变形明显,为“б”型,发育石英布丁构造。构造岩透射电镜分析结果进一步证实了该断裂的存在并具深断裂的特征。糜棱岩形成的差应力和应变速率及运动指向与郯庐断裂带内的糜棱岩相近。分析表明这条断裂是郯庐断裂带派生断裂,其形成与郯庐断裂左行平移有关。它控制燕山期花岗岩产出空间,指示郯庐断裂带左行平移可能发生在印支晚期。深断裂的属性使其成为金矿重要的区域控矿构造。The result of TEM analysis of mylonites of the Guandian-Longwangjian fault has verified the existence of this fault and revealed its deep-fault features. The differential stress, strain rate and direction of the movement of the fault during the formation of the mylonites are close to those of the Tan-Lu fault system. The formation of the fault is closely related to the sinistral-slip of the Tan-Lu fault. The deep-fault characters of this fault make it an important regional ore-control structure for gold deposits in the area. The occurrence of the Yanshanian granites indicates that the main sinistral strike-slip movement of the Tan-Lu fault system probably took place during the late Indosinian epoch.

关 键 词：管店--龙王尖 断裂 糜棱岩 透射电镜 郯庐断裂带 

分 类 号：P542.3[天文地球—构造地质学] P588.332[天文地球—地质学]