渤南洼陷沙四段陆源碎屑与碳酸盐混合沉积特征与模式

Mixed Sedimentary Characteristics and Mode of Terrigenous Clastics and Carbonate in Es_4 of Bonan Depression

讨论了渤南洼陷沙河街组沙四段陆源碎屑与碳酸盐的混合沉积成因 ,按混合方式和沉积背景将研究区混合沉积划分为扇三角洲型、辫状河三角洲型、近岸水下扇型、湖泊型 4种类型 ,并详细叙述了其特征和分布 ,认为构造作用、气候和物源是控制混合沉积的主要因素。在此基础上 。

The mixed sedimentary genesis of Es_4 terrigenous clastics and carbonates in Bonan Depression is discussed. According to the mixed modes and sedimentary background, the mixed sediments in the studied area are divided into fan deltaic deposit, braid river deltaic deposit, inshore-subsea fan deposit and lacustrine deposit. Their characteristics and distribution are discussed in detail, it is considered that the climate and sources are the main factors controlling the mixed sediments. On the basis stated above, the mixed sedimentary modes of Es_4 terrigenous clastics and carbonates is established.