【作者】 张维宸；

【导师】 颜丹平；

【作者基本信息】 中国地质大学（北京） ， 构造地质学， 2009， 硕士

【摘要】 四川盆地是龙门山以东、齐跃山以西、大巴山以南、大娄山以北的地区。它在构造上属于上扬子板块的一部分。面积约为25×104km~2。本文在大量总结前人研究成果的基础上,对四川盆地中新生代构造演化和构造作用过程进行了研究。结合航磁、重力资料、地震资料和DEM资料、ESR测年资料以及其他相应的地质资料和野外地质调查资料,对四川盆地的基底构造、地层结构等进行了研究。运用电磁反演资料、遥感资料、GPS监测资料、钻井资料(龙深1井)和穿越龙门山地区地质剖面等方法,对龙门山冲断带的构造演化史进行了剖析。运用构造层序和构造沉积资料,对川西前陆盆地的形成、演化过程进行了分析,认为川西盆地演化的动力学环境:拉张环境(Z—P)→过渡环境(T—J)→挤压环境(K—现今)。基于川中隆起区基底相对坚硬,整个海相构造层形变微弱,地层纵、横向连续性好,川中隆起区在多旋回构造改造过程中只被为数不多的断层所切割,以发育低-微幅度褶皱构造样式为特点,盆地盖层浅部(即上古生界以上地层)主要发育相对宽缓的箱状褶皱构造的构造格架及构造作用过程进行研究。对川东隔挡式褶皱带的研究,先研究隔挡式褶皱带,进而分析了滑脱带(层)问题。盆山体系的研究是石油和天然气等能源、大地构造理论与模式以及其它地质理论发展的关键,论文最后运用盆山耦合理论对四川盆地的中新生代构造形变史和构造作用过程进行了总结归纳。总之,论文始终围绕着四川盆地中新生代构造作用这个中心而展开论述的,通过对盆地宏观和微观构造演化阶段的研究,以及对部分构造作用过程的模拟,目的是揭示四川盆地在印支期-燕山期-喜山期的一系列的改造和复杂变形。更多还原

【Abstract】 Sichuan basin, which is about 250,000 square km, is in the east of Longmenshan, in the west of Qiyueshan, in the south of Dabashan and in the north of Daloushan. Tectonically speaking, it belongs to Yangtze plate.On the basis of previous studies, this article concentrates on the structural evolution in Mesozoic and Cenozoic as well as the process of tectonism in Sichuan basin. The basement and stratigraphic structure were studied in this paper by the aeromagnetic and gravity data、seismic data and DEM data、ESR age data. Electromagnetic data、remote sensing data、GPS monitoring data、drilling data and geological section were used in the research of the structural evolution of longmenshan. By the analysis of the formation and structural evolution of Sichuan basin, the dynamic environment of the evolution of Sichuan basin is: extensional (Z-P) to transition (T-J) to extrusion (K-Present). The basement of the central Sichuan basin is relatively hard; the deformation of the entire marine layers is weak; the horizontal and vertical continuity of layers is very good. The central area of Sichuan basin which is characterized by the low-micro range of fold structural style, was cut by seldom faults during the multi-cycle reconstruction. There are many box-folds in the superficial cover layer, this article concentrates on the process of tectonism, and then the slip zone. The key to the studies of oil and gas resources, tectonic theories and model and other theories is the research about the basin- mountain system. At the end of the article, the basin-mountain coupling theory was used to summarize the structural deformation and tectonism in the Mesozoic and Cenozoic of Sichuan basin. In a word, the focus of this article is the tectonism in the Mesozoic and Cenozoic of Sichuan basin, by the study of macro and micro structural evolution stage and the modeling of some tectonism, the reconstruction and the deformation in indosinian-yanshan-himalayan stage of Sichuan basin is clear to see.更多还原