3D Structural Growth and Tectonic Geomorphology of Active Fault-Bend Folds

活动断层弯曲褶皱的 3D 构造生长和构造地貌

• 批准号: 9614675
• 负责人: Karl Mueller
• 金额: $ 15.81万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614675&HistoricalAwards=false
• 关键词: 3D; Structural; Growth; Tectonic; Geomorphology

9614675 Mueller Two important deterrents limit our understanding of shallow crustal deformation as well as its relationship to active seismicity. They are the lack of knowledge of the time frame of earthquake events, and the role of faulting that is totally subsurface, that is , faults that never break through to the surface. This project will examine folds that form above unexposed (blind) faults in southern California by studying 1 landforms on hills that are produced by active folding, 2 young surficial deposits, and 3 subsurface structure using data from oil wells. Geomorphic structures that may be related to seismic deformation will be dated by isotopic methods, and then compared to historic and extrapolated earthquake frequency patterns. Together these results are expected to be useful in evaluating the potential relationships among several types of land forms, and seismicity on blind structures.

两个重要的阻碍因素限制了我们对浅层地壳变形及其与活跃地震活动的关系的理解。它们是缺乏对地震事件时间框架的了解，以及完全在地下的断层的作用，即从未突破到地面的断层。该项目将研究南加州未暴露（盲）断层上形成的褶皱，通过使用油井数据研究1个由活动褶皱产生的山丘地貌，2个年轻的地表沉积物和3个地下结构。可能与地震变形有关的地貌结构将通过同位素方法确定年代，然后与历史和外推的地震频率模式进行比较。预计这些结果将有助于评估几种地形类型与盲构造地震活动性之间的潜在关系。