合肥盆地中新生代三维埋藏史分析  

3-D Burial History Analysis of Hefei Basin since Mesozoic

作　　者：王利[1] 周祖翼[1] 朱毅杰[1] 

机构地区：[1]同济大学海洋地质国家重点实验室,上海200092

出　　处：《高校地质学报》2007年第1期105-111,共7页Geological Journal of China Universities

基　　金：国家自然科学基金项目(批准号:40321603;40572075)资助

摘　　要：在合肥盆地地震资料的基础上,求得现今盆地内部中新生代各个地层的厚度分布。并通过回剥技术模拟盆地埋藏史,获得合肥盆地中生代以来三维演化历史。结果显示中生代以来,合肥盆地沉积地层最厚超过万米,中上侏罗统为主要沉积地层;三维埋藏史揭示合肥盆地的中新生代沉积演化历史受大别造山带和郯庐断裂带的共同控制,盆地沉积中心的迁移与大别造山带和郯庐断裂的活动密切相关。The Hefei basin, located at the south boundary of North-China Block, is a large-scale terrestrial basin formed during Mesozoic and Cenozoic period. The sedimentary features and tectonic evolution of Hefei basin were mainly controlled by Dabieshan orogenic belt and the Tan-Lu fault zone. Based on the seismic and borehole data, 3-D burial history analysis is carried out on Meso-Cenozoic strata of Hefei basin following the principle of backstripping. The overall thickness of Mesozoic and Cenozoic strata is more than 10 km in the Hefei basin, with Middle to Upper Jurassic strata constituting its major part. The analysis also shows that Hefei basin experienced 3 major tectonic erosion events since the Mesozoic. The location and migration history of the deposition center of different strata in the basin demonstrates that the deposition history of Hefei basin was jointly controlled by the Dabieshan orogenic belt and the adjacent Tan-Lu fault zone. While Dabieshan orogenic belt played the dominant role in the Jurassic and Cenozoic, the large-scale strike-slip movement of Tan-Lu fault zone was the most important controlling factor in the Cretaceous.

关 键 词：合肥盆地 埋藏史 大别造山带 郯庐断裂 

分 类 号：P618.13[天文地球—矿床学]