摘要：Tectonically controlled topography influences deep-water sedimentary systems. Using 3-D seismic reflection data from the Levant Basin, eastern Mediterranean Sea, we investigate the spatial and temporal evolution of bedforms on a deep-water fan cut by an active normal fault. In the footwall, the fan comprises cyclic steps and antidunes along its axial and external portions, respectively, which we interpret to result from the spatial variation in flow velocity due to the loss of confinement at the canyon mouth. Conversely, in the hanging wall, the seafloor is nearly featureless at seismic scale. Numerical modeling of turbidity currents shows that the fault triggers a hydraulic jump that suppresses the flow velocity downstream, which thus explains the lack of visible bedforms basinward. This study shows that the topography generated by active normal faulting controls the downslope evolution of turbidity currents and the associated bedforms and that seafloor geomorphology can be used to evince syn-tectonic deposition. ? 2021. The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license.

ISSN号：917613

卷、期、页：v 49,n 12,p1495-1500

发表日期：2021-12-01

影响因子：4.768000

期刊分区（SCI为中科院分区）：一区

收录情况：SCIE（科学引文索引网络版）,地学领域高质量科技期刊分级目录（国外T1）,EI（工程索引）

发表期刊名称：Geology

参与作者：Maselli, Vittorio,Micallef, Aaron,Normandeau, Alexandre,Oppo, Davide,Iacopini, David,Green, Andrew

第一作者：葛智渊

论文类型：期刊论文

论文概要：Maselli, Vittorio,Micallef, Aaron,Normandeau, Alexandre,Oppo, Davide,Iacopini, David,Green, Andrew,葛智渊，Active faulting controls bedform development on a deep-water fan，Geology，2021，v 49,n 12,p1495-1500

论文题目：Active faulting controls bedform development on a deep-water fan