Kinematic Analysis of Brittle Fault Zones Using Landslide Deposits as Analogues

以滑坡沉积物为类比的脆性断裂带运动学分析

• 批准号: 9218402
• 负责人: Darrel Cowan
• 金额: $ 5.22万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218402&HistoricalAwards=false
• 关键词: Kinematic; Analysis; Brittle; Fault; Zones

Current methods for determining the slip vector or sense of shear for brittle fault zones of any age or seismic capability are largely based on the orientation of striations. Brittle fault zones lacking striations are difficult or impossible to analyze kinematically by these methods. The primary objective of this research is to test the general applicability of a new, symmetry-based method for stereographically and statistically determining the synoptic slip vector in non-striated fault zones. The model will be tested by measuring and analyzing Riedel structures and folds developed in the basal, gouge-filled shear zones of several Cenozoic to Recent landslides or rock avalanches in the southwestern US where the slip vector is known. Results will help validate a new method for determining slip directions in unstriated brittle faults which are common in nature.

当前用于确定任何年龄或地震能力的脆性断层带的滑移矢量或剪切感的方法主要基于条纹的方向。 缺乏条纹的脆性断层带很难或不可能通过这些方法进行运动学分析。 本研究的主要目的是测试一种基于对称性的新方法的普遍适用性，用于立体测量和统计确定非条纹断层带中的天气滑移矢量。 该模型将通过测量和分析 Riedel 结构和褶皱进行测试，这些结构和褶皱是在美国西南部的几个新生代到近期的山体滑坡或岩崩的基底、充满泥沙的剪切带中形成的，其中滑移矢量是已知的。 结果将有助于验证一种确定自然界中常见的无条纹脆性断层滑动方向的新方法。