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.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2007年第4期412-417,共6页
Geotectonica et Metallogenia
基金
中石化委托项目DBKT2004YJ018
关键词
绥滨坳陷
拉张因子
沉降史分析
Suibin depression
stretch factor
subsidence analysis
backstripping
forward modeling