砂质扇三角洲沉积过程实验研究  

Experimental Study of Sandy-fan-delta Sedimentary Process

作　　者：张春生[1] 刘忠保[1] 施冬[1] 张吉来[2] 王德玉[2] 朱广社[2] 马永宁[2] 

机构地区：[1]江汉石油学院地球科学系,湖北荆州434023 [2]长庆油田分公司第三采油厂,宁夏银川750006

出　　处：《江汉石油学院学报》2003年第2期1-3,共3页Journal of Jianghan Petroleum Institute

基　　金：国家自然科学基金(40272057D0206)

摘　　要：沉积模拟实验表明,砂质扇三角洲侵蚀-沉积过程从扇三角洲平原开始,经历了直河道沉积、侵蚀-河口坝形成、滑塌-分流点向上迁移、砂坝生长-辫状河道废弃-形成新朵体的过程。基准面变化对扇三角洲影响明显:基准面上升,扇三角洲沉积厚度增加,但平面形态及展布范围变化较小;基准面下降,展布范围增大,并出现新的扇三角洲朵体。Sedimentary simulation experiment shows that the encroached-sedimentary process of sandy-fan-delta starts from fan-delta plane,which experiences straight channel, forming of encroached-debouch bar .upper transferring of slum-ping-shunting point, sandy bar growing, braided channel abandoned and forming new lobes. It is obvious that the change of base level would influence the fan-delta: when the base level rises, sedimentary thickness of the fan -delta increases, but the plane configuration and range of distribution have less changing. When the base level descends, range of distribution increases and new fan-delta lobes appear.

关 键 词：冲积扇 三角洲 碎屑沉积 沉积模式 模拟试验 基准面 

分 类 号：P512.2[天文地球—地质学]