陆相断陷盆地坡折带成因类型及控砂模式——以南堡凹陷为例

陆相断陷盆地独特的地质结构决定了其发育多种成因类型的坡折带,控制了多种类型的隐蔽圈闭的形成与分布.南堡凹陷多凸多凹,存在断裂坡折带、挠曲坡折带、沉积坡折带和侵蚀坡折带4种成因特征的坡折带类型,其分布受构造与沉积因素的双重影响,归根结底受长期、多期活动的断裂控制;坡折带控制了坡折砂的形成与分布,研究区发育断裂坡折砂、挠曲坡折砂、沉积坡折砂和侵蚀坡折砂4种成因类型的砂体.它们受各成因类型坡折带控制,其有规律的分布构成了陆相断陷盆地坡折带控砂模式.

Genetic type and sandbodies controlled model of the slope break belts in the nonmarine faulted basin——taking Nanpu depression as an example

Individual geological structure of continental fault depression ba-sins controls the forming genetic type of slope break and the formation and distribution of all kinds of subtle traps. There are four kinds of slope break belts called fault slope break belt,warp slope break belt,sedimentary slope break belt and erosional slope break belt in the Napu depression.The distribution of these slope break belts is controlled by both structure and deposition. Fundamentally these slope belts are controlled by the lon...