RUI: Geomorphology and Erosion of Extensional Mountain Blocks

RUI：伸展山块的地貌和侵蚀

• 批准号: 9317181
• 负责人: David Harbor
• 金额: $ 6.42万
• 依托单位: Washington and Lee University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317181&HistoricalAwards=false
• 关键词: RUI; Geomorphology; Erosion; Extensional; Mountain

9317181 Harbor Geomorphic response to extensional uplift is a matter of concern to the geomorphologist, geophysicist, and sedimentologist, but has received little quantitative study. The area south of Yellowstone in the transition between the Basin and Range and Middle Rocky Mountains of Wyoming is dotted by extensional uplifts that exhibit a varying degree of structural offset and erosional dissection. the types of geomorphic processes and rates of erosion in several of these ranges will be studied in order to provide new data on redistribution of mass in the presence of major tectonic relief. The field area will also be numerically described in terms of relief and the dimensions/characteristics of drainage basins and stream segments, in part from DEM models of topography. Selected areas within these mountainous uplifts will also be mapped according to geomorphic process and studied in detail for rate of erosion. Using deposits that have accumulated on datable surfaces and incision or aggradation of streams over the last 103 to 104 years, the rate of processes on "competing" geomorphic components of mountain uplifts will be quantified. Deposits slated for study include pluvial lake deltas, debris fans, and valley fills behind landslide dams and moraines. All of these data will be used together to discover, if possible, the important predictors of denudation rate, such as relief or drainage area. Conceptual models of geomorphic processes will be evaluated against these data and also against descriptions of processes. Of particular interest is the change in rate of drainage basin erosion with time and increasing offset.

9317181港口对伸展隆起的地貌反应是地貌学家，地球物理学家和沉积学家的关注问题，但很少进行定量研究。 黄石公园以南的盆地和山脉和怀俄明州中部落基山脉之间的过渡中的区域被延伸的隆起点缀，这些伸展隆起表现出不同程度的结构偏移和侵蚀性的解剖。 将研究其中几个范围中的地貌过程和侵蚀速率的类型，以便在存在重大构造缓解的情况下提供有关质量重新分布的新数据。 田间区域也将以数值描述，以及排水盆地和流段的尺寸/特征，部分是由DE​​M的地形模型描述的。 这些山区隆起中的选定区域也将根据地貌过程进行映射，并详细研究侵蚀速度。 使用在过去103至104年中积累在数据表面上的沉积物，切口或流的切口，将量化“竞争”的“竞争”地貌成分的过程速率。 用于研究的矿床包括pluvial湖三角洲，碎片风扇和山谷水坝和山地后面的山谷。 所有这些数据将一起使用，以便在可能的情况下发现剥离率的重要预测指标，例如释放或排水区域。 地貌过程的概念模型将根据这些数据进行评估，并针对过程的描述进行评估。 特别有趣的是，随着时间的推移和偏移的增加，排水盆地侵蚀率的变化变化。