Late Cenozoic and Active Uplift of a Restraining Bend along a Continental Transform -- the Dead Sea Fault in Lebanon

摘要黎巴嫩抑制弯（Lebanese restraint Bend， LRB）构成了死海左侧断裂系统（DSFS）的一段200公里长，因此是该大陆转换系统的一个重要部分。尽管DSFS的构造突出，但直到过去十年，该板块边界的北部500公里（包括LRB）一直是相对较少的实地新构造研究的主题。几乎所有以前的研究，包括PI的研究，都集中在该地区的走滑构造上；然而，隆升是新构造图景的重要组成部分。要解决的关键科学问题包括黎巴嫩山脉发生了多少次不同的抬升，以及这些抬升与DSFS沿线不同构造时期的时间如何对应？这有助于解决非洲-阿拉伯板块边界是否随时间迁移的问题。其他问题涉及到现在和过去隆升的空间分布，以及继承晶体结构（例如，中生代Palmyride裂谷系统或新特提斯被动边缘）对LRB运动学的可能影响。本工作旨在评估记录晚新生代和LRB活动隆升的可行性。

ABSTRACTThe Lebanese Restraining Bend (LRB) constitutes a 200-km long section of the left lateral Dead Sea fault system (DSFS), and, hence, represents a significant segment of thiscontinental transforms system. Despite the tectonic prominence of the DSFS, the northern 500 km of this plate boundary (including the LRB) have, until the past decade, been the subject of relatively few field-based, neotectonic studies. Almost all previous studies, including research by the PI, have focused on the strike-slip tectonics of the region; yet, the uplift is a significant component of the neotectonic picture.Key scientific questions to be addressed include how many distinct episodes of uplifthave occurred in the Lebanese mountains, and how do these correspond with the timing of different tectonic episodes along the DSFS? This can help address the question of whether the African-Arabian plate boundary has migrated over time. Other issues pertain to the spatial distribution of present and past uplift, as well as the possible influence of inherited crystal structures (e.g., the Mesozoic Palmyride rift system or the Neo-Tethyan passive margin) on the kinematics of the LRB.This proposed work would assess the feasibility of documenting Late Cenozoic and activeuplift of the LRB.