黑龙江省三江盆地绥滨坳陷沉降史分析  

TECTONIC SUBSIDENCE HISTORY OF THE SUIBIN DEPRESSION,SANJIANG BASIN IN HEILONGJIANG PROVINCE

作　　者：武国忠[1] 刘安[2] 郭翔燕[1] 吴世敏[1] 

机构地区：[1]中国科学院边缘海地质重点实验室 [2]中山大学地质系,广东广州510275

出　　处：《大地构造与成矿学》2007年第4期412-417,共6页Geotectonica et Metallogenia

基　　金：中石化委托项目DBKT2004YJ018

摘　　要：三江盆地绥滨坳陷现有4口钻井的一维正、反演构造沉降模拟结果表明,绥滨坳陷显示出张裂盆地的特征,表现为120Ma之前张裂阶段和之后的裂后热沉降阶段。张裂阶段沉降速率大约为80.37m/Ma,沉降量达1300m,拉张因子大约为1.16。热沉降阶段的沉降速率降到了6.6m/Ma,沉降量也只有200m左右。Based on the sedimentary lithological associations and paleogeographic data from four drilling wells in the Suibin depression of the Sanjiang basin, this paper applies 1-D backstripping and forward modeling methods to cal- culate the tectonic subsidence and stretch factor of the basin. The results show that the Suibin depression have typi- cal extensional features and could be divided into two extensional stages： the rifting stage prior to 120 Ma and the subsequent thermal subsidence stage. The tectonic subsidence rate is about 80.37m/Ma and stretch factor is 1.16 in the earlier rifting stage, while the thermal subsidence rate is only 6.6m/Ma with a subsidence of about 200 m in the later stage.

关 键 词：绥滨坳陷 拉张因子 沉降史分析 

分 类 号：P542[天文地球—构造地质学] TE121[天文地球—地质学]