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: 0519158
• 负责人: Kelin Whipple
• 金额: $ 23.11万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-15 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0519158&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.

这项研究是在圣加布里埃尔山脉（San Gabriel Mountains）进行的为期三年的合作研究工作，以系统地研究山坡和渠道的反应，以提高从土壤融合，蠕变和ravel山的山坡到岩石，落基岩，底石，山地滑坡山地的岩石上升率提高。 公开的数据和初步地形分析以及河流沉积物中宇宙基因10BE的测量结果表明，（1）侵蚀率在整个范围内从0.1到1 km/ma的整个范围内变化，（2）碎屑coseogenic 10be是该景观的有效侵蚀结果。 在圣加布里埃尔山脉（San Gabriel Mountains）中，具有相对统一的岩性和气候条件（具有已知的地形降雨模式）的侵蚀率的系统变化为回答景观进化中的几个关键问题提供了前所未有的机会。将测试六个针对进一步发展对构造和地形之间关系的定量理解至关重要的可检验的假设，并确定了一组特定的野外地点和方法，该假设应对这些假设进行确定的测试以及对基本过程的量化。这项工作的更广泛的影响涵盖了用于促进研究范围的五个一般NSF标准。从根本上讲，该项目符合我们的主要教育目标：将现场研究整合到不同受众的教育中，进一步了解他们对地面表面过程的理解，并有助于弥合理论与应用以及科学和政策之间的差距。