昌图县下二台岩群的构造-岩层分析  

ANALYSIS ON THE TECTONO-STRATA OF XIAERTAI ROCK GROUP IN CHANGTU COUNTY HU

作　　者：胡晋伟 李东涛 周勇 孙乾友 

机构地区：[1]辽宁省地质矿产勘查局第九地质大队,辽宁铁岭112000

出　　处：《辽宁地质》2000年第4期271-279,共9页

摘　　要：下二台岩群 ,系下二台地区的奥陶纪变质岩系，遭受强烈的韧－脆性变形的改造，并在后期叠加了热接触变质及动力变质作用。经原岩恢复可将下二台岩群分为三个岩组：盘岭岩组，黄顶子岩组及烧锅屯岩组，其原岩建造分别为火山岩建造、碳酸盐岩建造及碎屑岩建造。下二台岩群具有三种不同变形相的递进演化规律，相应形成三种构造群落：顺层固态流变构造群落、弹塑性弯曲构造群落、断裂构造群落。下二台岩群地层层序从构造层次角度推断自下而上应为盘岭岩组、黄顶子岩组、烧锅屯岩组。Xiaertai rock group,a set of metamorphic rock system in Xiaertai area,has experienced strong ductilebrittle deformation and then thermal contact metamorphism and dynamometamorphism in the late stage.Through protolith reconstruction,Xiaertai rock group can be divided into 3 petrofabrics:Panling petrofabric(subdivided into 4 rock members),Huangdingzi petrofabric and Shaoguotun petrofabric,which the protolith formation respectively are volcanic rock formation,carbonate rock formation and clastic rock formation. In Xiaertai rock group,there exist 3 different deformation facies of progressive evolution regulation,corresponding 3 structural groups:bedding solid state flowage structural group,elasticplastic curved structural group and faulting structural group.Frow the view of structural sequence,the stratigraphic sequence of Xiaertai rock group from lower to upper is Panling,Huangdingzi and Shaoguotun petrofabrics

关 键 词：岩群 构造群落 地层层序 原岩建造 演化 变质岩 

分 类 号：P588.33[天文地球—岩石学]