中国东部陆相断陷盆地双断凹陷类型及特征

以中国东部陆相断陷盆地双断凹陷为研究对象,分别从构造形态和沉积物充填方向2个角度,提出两种类型划分方案.一种分类方案是根据凹陷的构造(剖面)形态、内部结构、边界条件不同,将双断凹陷分为简单双断凹陷和复杂双断凹陷2大类,并对上述两类进一步细分.另一种分类方案是依据沉积物充填方向、发育的沉积体系,将双断凹陷分为短轴单向充填型双断凹陷、短轴双向充填型双断凹陷、复合充填型双断凹陷和长轴充填型双断凹陷4类.并对不同类型的双断凹陷特征进行分析,从而为双断凹陷综合研究和油气勘探提供分类依据和理论指导.

The Types and the characteristics of the double-fault depressions in the continental faulted basins in east China

The double-fault depressions in the continental faulted basins in east China are classified.There are two classification projects.The first is based on the structural configuration,the internal structure,and the boundary condition of the double-fault depressions,and the double-fault depressions are divided into two types of simple double-fault depression and complex double-fault depression.The two types can also further divided.The second is based on the sediment parking direction and depositional system of the double-fault depressions,and the double-fault depressions are divided into four types of minor-axis unilateral sedimentary parking,minor-axis bi-directional sedimentary parking,major-axis unilateral sedimentary parking and tri-directional sedimentary parking.The basic characteristics of the different types of double-fault depressions are analyzed.The two classification projects provide the classification foundation and theoretical guide for the synthetic research and hydrocarbon exploration of the double-fault depressions.