Collaborative Research: Tectonics and Topography in the Transverse Ranges: Landscapes Response to Rock Uplift Rate across the Transition from Soil-Mantled to Rocky Slopes

合作研究：横向范围内的构造和地形：从土覆盖到岩石斜坡过渡过程中景观对岩石抬升率的响应

• 批准号: 0724194
• 负责人: Kelin Whipple
• 金额: $ 22.07万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0724194&HistoricalAwards=false
• 关键词: Collaborative; Research; Tectonics; Topography; Transverse

This study is a three-year collaborative research effort in the San Gabriel Mountains to systematically study both hillslope and channel response to increasing rock uplift rate across the critical transition from soil-mantled, creep- and ravel-dominated hillslopes to rocky, bedrock landslide-dominated hillslopes. Published data and preliminary topographic analyses coupled with measurements of cosmogenic 10Be in river sediments demonstrate that (1) erosion rates vary systematically throughout the range from 0.1 to = 1 km/Ma, and (2) detrital cosmogenic 10Be is an effective erosion-rate monitor in this landscape. The systematic west-to-east variation in erosion rate with relatively uniform lithologic and climatic conditions (with a known orographic rainfall pattern) in the San Gabriel Mountains affords an unprecedented opportunity to answer several key questions in landscape evolution. Six specific testable hypotheses that are critical to further development of a quantitative understanding of the relationship between tectonics and topography will be tested, and a specific suite of field sites and methods are identified that should yield definitive tests of these hypotheses as well as quantification of the underlying processes. Broader impacts of this work span the five general NSF criteria used to promote extending the reach of the research. Fundamentally, this project fits into our main educational objective: to integrate field studies into the education of diverse audiences, furthering their understanding of Earth surface processes and helping to bridge the gaps between theory and application as well as science and policy.

这项研究是在圣盖博山脉进行的一项为期三年的合作研究工作，旨在系统地研究山坡和河道对岩石抬升率增加的响应，跨越从土幔、蠕变和崩解为主的山坡到岩石、基岩滑坡的关键过渡。以山坡为主。 已发表的数据和初步地形分析以及河流沉积物中宇宙成因 10Be 的测量表明：(1) 侵蚀速率在 0.1 至 = 1 km/Ma 的范围内系统变化，(2) 碎屑宇宙成因 10Be 是一种有效的侵蚀速率监测器在这风景中。 圣盖博山脉侵蚀率从西到东的系统变化以及相对均匀的岩性和气候条件（具有已知的地形降雨模式）为回答景观演化中的几个关键问题提供了前所未有的机会。将测试六个具体的可测试假设，这些假设对于进一步发展对构造和地形之间关系的定量理解至关重要，并确定一套特定的现场地点和方法，这些地点和方法应该对这些假设进行明确的测试，并对构造和地形之间的关系进行量化。底层流程。这项工作的更广泛影响涵盖了用于促进扩大研究范围的五项 NSF 一般标准。从根本上讲，该项目符合我们的主要教育目标：将实地研究纳入不同受众的教育中，加深他们对地球表面过程的理解，并帮助弥合理论与应用以及科学与政策之间的差距。