基于钻井和地震数据恢复福山凹陷古地貌  

Restoration of Paleogeomorphology in Fushan Sag Based on Drilling and Seismic Data

作　　者：李媛 丁文秀 林松 LI Yuan;DING Wenxiu;LIN Song(Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA,Wuhan 430071,China;Hubei Key Laboratory of Earthquake Early Warning,Wuhan 430071,China;Wuhan Institute of Earthquake Engineering Co Ltd,Wuhan 430071,China)

机构地区：[1]中国地震局地震大地测量重点实验室,武汉市430071 [2]地震预警湖北省重点实验室,武汉市430071 [3]武汉地震工程研究院有限公司,武汉市430071

出　　处：《大地测量与地球动力学》2021年第9期945-948,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41472084);中国地震局社会公益研究项目(IS201626261)。

摘　　要：采用层序地层学古地貌恢复方法,通过计算盆地沉降量恢复北部湾盆地福山凹陷古近系流沙港组3个关键界面的原始古地貌形态。模拟结果显示,福山凹陷古近纪时期地貌沟谷纵横发育,凹陷分割性很强;垂向上,从Els3段到Els1段,古地貌起伏明显呈幕式变化,东西部凹陷呈现出不同的沉降特点和构造格局。We use the sequence stratigraphy paleogeomorphology restoration method to restore the original paleogeomorphology of the three key interfaces of the paleogene Liushagang formation in Fushan sag of Beibuwan basin by calculating the basin subsidence.The simulation results show that the geomorphic gullies are developed vertically and horizontally,and the depressions are highly segmented.In the vertical direction,from Els3 to Els1 period,the paleogeomorphic undulation is obviously episodic,and the eastern and western depressions presents distinctive subsidence characteristics and structural patterns.

关 键 词：古地貌恢复 层序地层学 沉降史 北部湾盆地 

分 类 号：P315[天文地球—地震学] P531[天文地球—固体地球物理学]