史115浊积扇的展布规律及其控制要素

针对目前浊积扇的沉积模式主要借鉴Walker扇模式存在一些不足之处，没有考虑外部因素，如海平面升降变化、构造作用等对浊积扇的控制和影响作用。以东营拗陷中西部的史115浊积扇为例，分析了构造作用、湖平面升降、沉积物供给、古地貌等要素对浊积扇的发育的控制作用。研究发现：构造作用、湖平面变化控制了可容空间的产生，沉积物供给导致可容空间减少，从而控制了浊积扇的发育；浊积扇的展布也受到沉积时古地貌的重要影响，各种要素的综合作用控制了浊积扇的形成与展布。对构造运动频繁的陆相断陷盆地的浊积扇研究具有参考价值。

DISTRIBUTION AND CONTROL FACTORS OF TURBIDITE FAN IN THE SHI 115 BLOCK

The existing sedimentary model of turbidity fan comes from Walker fan model, which has some deflects without considering such external factors as sea level fluctuation, tectonic setting. Taking Shi115 turbidity fan in midwest area of Dongying depression as example, the control of the factors to the development of turbidity fan, which are tectonic movement, sea level fluctuation, sediments supply and pale geomorphology is analyzed. Research shows that tectonic movement and lacustrine level fluctuation control the formation of sedimentary space, and the sediments supply results in the decrease of sedimentary space, so as to control the development of turbidity fan. The distribution of turbidity fan is severely impacted by pale geomorphology existed in the time of sedimentation, the integration of the factors controls the formation and distribution of turbidity fan.