The Influence of Surface Processes on Continental Deformation: Extension and Erosion in the Basin and Range

地表过程对大陆变形的影响：盆地和山脉的伸展和侵蚀

基本信息

批准号：
2390201
负责人：
金额：
--
依托单位：
Birkbeck, University of London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2020
资助国家：
英国
起止时间：
2020 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2390201
关键词：
Influence Surface Processes Continental Deformation

项目摘要

During continental deformation, strain is rarely evenly distributed across large regions, or equally partitioned onto discrete structures such as faults. Instead, some areas may host large amounts of strain, deformation and uplift, whilst others are left relatively undeformed. The reasons for this remain poorly understood. The drivers of partitioning of strain can range from rheological differences in the crust, to climate factors that influence erosion. During crustal extension, movement of surficial loads by surface processes can heavily influence the longevity of faults. It is thus possible that surface processes may play a vital role in partitioning strain in extensional domains. The Basin and Range provides an ideal area to study the influence of surface processes on tectonic development, as the region has been subject to ongoing extension since the Miocene and accommodates gradients in climate and different surface processes. This project will combine thermochronology analyses with numerical modelling of physical processes to characterise the strain rate history of the Basin and Range, assessing the extent to which surface processes can be considered drivers of strain release and range tectonic development. The wider utility of this work is that it can help inform seismic risk assessments associated with predicted climate change.

在大陆变形过程中，应变很少均匀地分布在大区域，或者平均分配到离散结构（例如断层）上。取而代之的是，某些区域可能会容纳大量的应变，变形和隆升，而另一些区域则相对不明显。这样做的原因仍然很少。菌株分配的驱动因素范围从地壳中的流变差异到影响侵蚀的气候因素。在地壳延伸过程中，表面过程的表面载荷运动会严重影响断层的寿命。因此，表面过程可能在延长域中分配应变中起着至关重要的作用。盆地和范围为研究表面过程对构造发育的影响提供了理想的领域，因为该地区自中新世以来一直在持续扩展，并在气候和不同的表面过程中适应梯度。该项目将将热量分析与物理过程的数值建模相结合，以表征盆地和范围的应变率历史记录，从而评估可以认为表面过程被认为是应变释放和范围构造发育的驱动因素。这项工作的更广泛效用是，它可以帮助为与预测的气候变化相关的地震风险评估提供信息。