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层序成因初步分析表明,陆相断陷盆地的层序形成机制不是海(湖)平面变化,而是幕式构造沉降作用。二级构造旋回控制层序的发育,三级、四级旋回分别是准层序组;大多数准层序形成的主导控制因素、构造沉降新增沉积空间与同期供给或充填盆地的沉积物体积之间的对比关系,决定了准层序、准层序组和体系域的类型和特征。作为划分陆相断陷盆地各级层序的主要界面,如不整合面、沉积间断面等,其形成与构造作用有关。层序成因分析同时还揭示陆相断陷盆地的湖平面变化与海平面变化不同步及没有可比性。
The preliminary analysis of the genesis of the sequence shows that the sequence formation mechanism of the continental rift basin is not the sea-lake plane change but the subsidence of the curtain structure. The development of second-order tectono-gyrato-control sequences is the quasi-sequence group. The dominant controlling factors of most quasi-sequence formation, the newly deposited space of tectonic subsidence and the sediment volume of the same period of supply or filling basin The relationship between the two determines the types and characteristics of quasi-sequence, quasi-sequence group and system domain. As the main interface that divides the sequences at all levels in the continental rift basin, such as unconformity, sedimentary facies and so on, the formation and tectonism are related. The sequence analysis also reveals that the lake level variation in the continental rift basin is not synchronous with the sea level change and is not comparable.