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现代地质 ›› 2004, Vol. 18 ›› Issue (2): 151-156.

• 构造与盆地分析 • 上一篇    下一篇

中国西北地区陆内前陆盆地的鉴别标志

陈发景1,汪新文2   

  1. 1中国地质大学 能源地质系,北京100083;2中国地质大学 地球科学与资源学院,北京100083
  • 收稿日期:2004-01-05 修回日期:2004-02-25 出版日期:2004-02-20 发布日期:2004-02-20
  • 作者简介:陈发景,男,教授,博士生导师,1927年出生,石油地质学专业,主要从事含油气盆地的分析研究工作。

IDENTIFIABLE CRETERIA OF INTRACONTINENTAL FORELAND BASINS lN NORTHEASTERN CHINA

CHEN Fa-jing,WANG Xin-wen   

  1. China University of Geosciences,Beijing 100083,China
  • Received:2004-01-05 Revised:2004-02-25 Online:2004-02-20 Published:2004-02-20

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旨类型。认为在鉴别陆内前陆盆地中必须进行多项标志的综合分析。

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

Abstract:

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 exterlsional 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 unconfofmity. It is concluded that comprehensive analysis of multiple criteria for identifying intercontinental foreland is very necessary.

Key words: intracontinental foreland basin, asymmetrical mountain front depression, reverse cycle, tectonic
movement,
subsidence curve

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