摘要
讨论了中国西北地区陆内前陆盆地的主要鉴别标志 :(1)不对称山前坳陷的构造几何形态 ;(2 )先缓后陡的两段式沉降曲线 ;(3)反沉积旋回上部磨拉石堆积、强烈构造运动和层内递进型构造角度不整合类型。
In this paper, identifiable criteria can be summarized as follows: (1) structural geometry of asymmetric mountain front depression, which is typical of the intracontinental for land basins; (2) subsidence curve of the intercontinental foreland basins consists of two sections which are different from extensional fault depressions, the first section is a gentle curve of total subsidence and tectonic subsidence; the second section shows a very steep curve;(3) molasses sediments in the upper part of reverse sedimentary cycle and offlap, intense tectonic movement and intraformational progressive tectonic angular unconformity.It is concluded that comprehensive analysis of multiple criteria for identifying intercontinental foreland is very necessary.
出处
《现代地质》
CAS
CSCD
2004年第2期151-156,共6页
Geoscience
关键词
陆内前陆盆地
不对称山前坳陷
反旋回
构造运动
沉降曲线
intracontinental foreland basin
asymmetrical mountain front depression
reverse cycle
tectonic movement
subsidence curve
