辽宁海城地区辽河群底部大型韧性滑脱带的构造演化  

STRUCTURAL EVOLUTION OF DUCTILE DECOLLEMENT ZONEOCCURRED BETWEEN ARCHAEAN GNEISS COMPLEXESAND PROTEROZOIC LIAOHE GROUP IN HAICHENG AREA, EASTERN LIAONING

作　　者：刘永江[1] 李三忠[1] 白立新 

机构地区：[1]长春地质学院地球科学系

出　　处：《长春地质学院学报》1996年第2期166-171,共6页

摘　　要：通过对辽宁海城地区赵家堡子－马风－什司县一带早元古宙辽河群底部地层和变质深成侵入体的详细构造研究，确认了辽河群底部与太古宙之间大型韧性滑脱带的存在。卷入滑脱带的地质体有辽河群底部浪子山岩组和早元古宙变质深成侵入体。滑脱带的构造演化可划分为：①吕梁运动早期沿太古宙与早元古宙接触带部位发生大规模拉伸顺层滑脱变形作用；②拉伸滑脱变形中晚期早元古宙深成侵入体沿滑脱带顺层同构造就位；③吕梁运动晚期滑脱带的收缩变形作用三大阶段。A large-scale ductile decollement zone between Archaean gneiss complexes and Proterozoic Liaobe group has been studied in detail.The zone consists of metasediments of Langzishan formation of lowermost Liaohe group and Proterozoic metaplutons. The structural evolution of the decollement zone is divided into three stages which are(1)regional layer-parallelled extensional ductile deformation in the contact between Archaean gneiss complexes and Proterozoic lowermost Liaohe group during early Luliang movement,(2)syntectonic layer-parallelled emplacement of Proterozoic plutons in the decollement zone during middle or later stage of regional extensional deformation,and (3)regional contract deformation during later Luliang movement.

关 键 词：辽河群 变形作用 构造演化 地层 早元古宙 

分 类 号：P534[天文地球—古生物学与地层学] 542[天文地球—地质学]