摘要
桐城桐山－庐江大化的飞来峰位于早白垩世杨湾组（Ｋ＿１ｙ）弱变形的紫红色陆相碎屑岩之上，由下古生界的硅化粗晶灰岩，白云质灰岩及硅质岩组成，岩层强烈碎裂。其中伴生的张裂隙及剪切石香肠指示岩层由南东向北西逆冲。这一飞来峰的形成与郊庐断裂南段平移作用产生的次级逆冲有关。是由此产生的推覆体差异剥蚀的结果，这种次级逆冲推覆作用发生在扬子板块前陆褶冲带的变形之后。
The klippe in Tongshan, Tongcheng-Dahua, Lujiang, lying on the early Cretaceous weakly deformed purplish red continental clastic rocks, consists of lower Paleozoic silicated sparry limestone, dolomitic limestone and sili-calite. The strongly fractured layers overthrust from southeast to northwest, which is proved through tensile fractures and boudins in the layers. It is concluded that the formation of the klippe is related to the secondary overthrust caused by thehorrizontal displacement of the south section of Tancheng -Lujiang fault after the deformation of the foreland foldedthrust zone of the Yangtze plate and the klippe results from differential denudation of the nappe.
出处
《安徽地质》
1994年第Z1期141-146,共6页
Geology of Anhui
关键词
郯庐断裂南段
逆冲推覆
飞来峰
桐城-庐江地区
south section of the Tancheng - Lujiang fault, overthrust, klippe, Tongcheng-Lujiang area
