石油与天然气地质 ›› 2001, Vol. 22 ›› Issue (1): 52-56.doi: 10.11743/ogg20010112

• 油气空间 • 上一篇    下一篇

断陷盆地砂砾岩体的发育特征——以沾化凹陷埕南断裂带下第三系沙三段为例

武恒志   

  1. 胜利石油管理局勘探事业部, 山东东营257200
  • 收稿日期:2000-12-11 出版日期:2001-03-25 发布日期:2012-01-16

DEVELOPMENT CHARACTERISTICS OF SAND-CONGLOMERATE BODIES IN FAULT-DEPRESSED BASINS:TAKE EOGENE SHA-3 MEMBER IN CHENGNAN FAULT BELT AS AN EXAMPLE

Wu Hengzhi   

  1. Exploration Project Department, Shengli Petroleum Administration, Dongying, Shandong
  • Received:2000-12-11 Online:2001-03-25 Published:2012-01-16

PDF (PC)

751

摘要：

沾化凹陷埕南断裂带沙三段中可识别出7个向上变浅的沉积旋回.这些沉积旋回是古水深和湖平面相对升降变化的沉积记录.在分别假定构造持续匀速沉降和气候保持温暖潮湿条件下,从沙三段沉积时的水位相对升降变化四级周期曲线可分解出构造沉降和气候变迁所引起的水位升降变化分量.其中,构造沉降分量远远大于因气候变迁引起的沉降分量.由此不难看出:(1)若断裂活动的旋回周期与气候变化周期同步,则两者对砂砾岩体的发育都有影响,为双重驱动,但断裂活动的贡献更大;(2)若两者不同步,砂砾岩体的形成主要受断裂活动的控制.

关键词: 断陷盆地, 砂砾岩体, 成因模式, 沉积旋回, 气候旋回, 断裂活动

Abstract:

Seven sedimentary cycles could be distinguished in Tertiary Sha-3 member of Chengnan fault belt in Zhanhua Sag which recorded the changes of paleo-water levels.It is constant that the changes of water level caused by tectonic subsidence are bigger than that caused by climate.This suggests that:if faulting cycle and climate variation cycle synchronize perfectly,they are both helpful for the development of sand-conglomerate;if they do not synchronize,the development of sand-conglomerate is mainly controlled by faulting.

Key words: fault-depressed basin, sand-conglomerate body, genetic model, sedimentary cycle, climate cycle, faulting

中图分类号: