河南熊耳山北坡西段的变质核杂岩和拆离断层

来源期刊：中南大学学报(自然科学版)1993年第5期

论文作者：高光明 彭恩生 郭宇杰

文章页码：579 - 584

关键词：变质核杂岩; 拆离断层; 伸展构造; 滑脱拆离带; 河南熊耳山

Key words：metamophic core complexes; detachment fault; extention structure; Henan Xionger Mountains

摘    要：河南熊耳山北坡西段的变质核杂岩核部,由太华群深变质岩系组成结晶基底,熊耳群未变质的火山岩系和第三系红层组成盖层。二者之间的滑脱拆离带下拆离盘由韧性变形的糜棱岩组成,具有典型的糜棱岩类岩石的基本特征。上拆离盘以脆性变形为主。盖层中发育了拆离断层特有的铲形断层,局部见同构造的花岗斑岩侵入其中。第三系红层向拆离断层反倾。滑脱拆离断层控制了本区热液矿床的分布,尤其是大型低品位金矿的分布。

Abstract: At the core part of the Xionger Mount.complexes,the crystalline basement is composed of Archacozoic Kata-metamorphic gneiss.The cover rocks,however,are composed of the non-metamorphic Xionger Volcanic rock system trod Tertiary red sedimentary formation.The lower part of detachment fault between the basement and the cover rocks is composed of mylonite and ultramylonite.The upper part is composed of cataclasite.The typical twedgedshaped faults of the detacbment fault are distributed in the cover rock and there exists syn-tectonic intrusive granite in some sites of the faults.The Tertiary red sedimentory formation antidips to the detachment fault. The distributiom of the hydrothermal ore deposits,especially large-scale low-gradedgold deposits in this area,is controlled by the detachment fault.