THEORETICAL SIMULATION OF EXTENSIONAL BASIN──A CASE STUDY OF THE SONGLIAO BASIN
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摘要: 本文对目前存在的裂谷盆地的两种理论模型进行了模拟,并通过其与实际盆地的观测资料的拟合,来确定盆地的形成机制和演化历史,得到有关盆地演化过程中诸如伸展量、构造沉降量、岩脉侵入量及古热流变化等参数。Abstract: Two kinds of theoretical geodynamic models (the uniform extension model and thenon-uniform extension model)of extensional basins were used to simulate the observed tectonic subsidence of the Songliao Basin to discuss the mechanism of extensional basins. Byfitting it with actual measured data,he genetic mechanism and evolution history of thebasin can be further recognized.Especially,the quantitive parameters of basin evolutionprocess such as extension quantity,tectonic subsidence,paleo-heat-flow,paleotemperatureand vein intrusive amount can be calculated.
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[1] 陈发景.裂谷构造的形成、演化和油气分布(上)、(下).地质科技情报,1984,(3-4) [2] 陈发景.我国含油气盆地的类型、构造演化和油气分布.地球科学,1986,(3) [3] McKenzie D P. Some remarks on the development of sedimentary basins.Earth and planet. Sci. Lett.,1978,40:25-32 [4] Royden L,Keen C E. Rifting proceaes and thermal evolution of the continental margin of eastern Canada determined from subsidence curves,Earth and planetary Science Letters,1983, (51) [5] Keen C E. Thermal history and subsidence of rifted continental margins-evidence from Wells on the Nova Scotian and Labrador Shelves.Can. J. Earth Sci.,1979,16 [6] Hellinger S J and Sclater J G. Some Comments on two layer extension models for the evolution of sedimentary basins,J. Geophs. Res.,1983, 88:8251-8270 -
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