摘要
辽西地区中生代陆相盆地及盆岭构造发育,可划分为早中印支期(T1,2)、晚印支期—早燕山期(T3-J1)、中燕山期(J2-J3)、晚燕山期(K1)、末燕山期(K2)5个盆地形成时期.一般地,盆地早期多为断陷阶段,晚期为拗陷阶段.盆地长轴方向为北东向或北北东向,受控于该时期的构造格架.山岭(古隆起)及其间宽广低拗的盆地组合形成盆岭构造.盆岭构造为辽西地区中生代构造的一大特色,可分为侏罗纪和白垩纪2个类型的盆岭构造,也反映了中生代地壳多次的裂陷和伸展作用.
The Mesozoic continental basins and basin-range structures are well developed in Western Liaoning Province. The basins were formed in five stages, i.e. Early-Middle Indosinian （T1.2）, Late Indosinian-Early Yanshanian（T3-J1）, Middle Yanshanian （J2-J3）, Late Yanshanian （ K1） and the end of Yanshanian （K2）. Generally, the basins express fault-depression in the early stages, while depression in late stages. The major axes of the basins trend NE or NNE, controlled by the tectonic frameworks then. The mountains （old uplifts） and wide basins in between combined the basin-range structures, which characterize the Mesozoic structure in Western Liaoning. The basin-range structures can be classified into Jurassic and Cretaceous types, showing multiple crust movements of fault-depression and extension during Mesozoic.
出处
《地质与资源》
CAS
2009年第2期81-86,共6页
Geology and Resources
关键词
辽西
中生代
盆地
盆岭构造
裂陷与伸展
basin
basin-range structure
fault-depression and extension
Mesozoic
Western Liaoning
