摘要
济阳坳陷下第三系沉积时构造运动以断陷为主要特征 ,在其陡岸形成了以近物源、重力流为主的沉积体系 ,不同的陡岸类型控制了沉积体系的发育与展布。本文在研究济阳坳陷的陡岸沉积特征的基础上归纳提出了断蚀陡岸沉积模式。
The tectonic movement of Jiyang Sub basin in Early Tertiary is mainly characterized by faulting depressing. The depositional system,which were dominated by proximal gravity flow,is developed along the steep slope of Jiyang Sub basin, and it's development and distribution are controlled by the types of steep slopes. In this paper, based on the depositional characteristics, depositional models of steep slope sedimentation are concluded as 3 types steep slope on the depositional eroded fault,slope model interim steep slope and continuous steep slope. The common depositional characteristics on steep slopes are that the nearshore subaqueous fan is widely developed and it's developed degree has close relation to the fault throw and active time. The depositional types on steep slopes are controlled by the activities and developing characteristics of faults, and different depositional types have developed in different deposition systems and vertical evolution successions. The evolution law of deposition on steep slope is that: alluvial fan→fan delta→delta, nearshore subaqueous fan→sublacustrine fan.
出处
《沉积学报》
CAS
CSCD
北大核心
2001年第2期219-223,共5页
Acta Sedimentologica Sinica
