论文部分内容阅读
库车坳陷下三叠统为三角洲、湖泊沉积。北缘发育的扇三角洲和辫状河三角洲是本区主要的沉积相类型。扇三角洲沉积以突发的灾变事件产生的重力流与牵引流沉积共存为特点。前者以碎屑流成因的块状砾岩为主占主导地位，后者为扇面河道砂体，多呈透镜状分布于重力流沉积物中；辫状河三角洲沉积以正常牵引流尤以河道沉积为主，砂体呈层状，侧积交错层发育。二者自成体系却又相互联系，构成两个密切相关的演化阶段，受控于坳陆边缘断裂活动的强度和延续时间。
The lower Triassic in the Kuqa Depression is a delta and lacustrine sediments. The fan delta and braided river delta developed in the north margin are the main types of sedimentary facies in this area. The fan delta deposits are characterized by the coexistence of gravity flow and traction deposition due to sudden catastrophic events. The former dominated by massive conglomerate of debris flow, the latter is fan-shaped channel sand body, mostly lenticular distribution in gravity flow sediments; braided river delta deposition with normal traction especially river sediments Mainly, the sand body is stratified, lateral plot staggered layer development. The two are interconnected with each other in their own system, forming two closely related evolution stages controlled by the intensity and duration of fault activity along the marginal continental margin.