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
