Depositional Models on the Steep Slope of Paleogene,Jiyang Sub-basin
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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、间歇陡岸沉积模式和持续陡岸沉积模式三种主要类型.Abstract: The tectonic movement of Jivang Suh-basin in Earlv TerLiarv is mainly characterized by faulting-depressing. The deposiLional svstem, which were dominated by proximal gravity flow is developed along the steep slope of Jivang Suh-hasin, and its development and distribution are controlled by the types of steep slopes.In Lhis paper based on Lhe depositional characterisLics, depositional models of sleep slope sedimentation are concluded as 3 Lypes-sLeep slope on Lhe depositional eroded faulL, slope model interim steep slope and continuous steep slope.The common deposiLional characteristics on sleep slopes are LhaL Lhe nearshore suhaqueous fan is widely developed and it's developed degree has close relation to the fault throw and active time.The deposltlonal types on stpep siopes ace contcolled by the activities and developlng characheteristics of faultsn and different deposiLional types have developed in different deposition systems and vertical evolution successions.The evolution law of deposition on steep slope is that: alluvial fan→fandelta→delta, nearshore suhaqueous fan→suhlacusLrine fan.
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Key words:
- Jiyang sub-basin /
- faulted-depression /
- depositional models of steep slope /
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