RUI: COLLABORATIVE RESEARCH: Active Strain within the Pacific-North America Oblique-Divergent Plate Boundary, Baja California Sur, Mexico

RUI：合作研究：墨西哥南下加利福尼亚州太平洋-北美斜发散板块边界内的活跃应变

• 批准号: 9802792
• 负责人: Paul Umhoefer
• 金额: $ 10.28万
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9802792&HistoricalAwards=false
• 关键词: RUI; COLLABORATIVE; RESEARCH; Active; Strain

9802792 Umhoefer Strain and deformation partitioning at oblique convergent plate margins was proposed twenty-five years ago, and subsequently has been identified in the arcs of many subduction zones. Whether or not deformation is partitioned in divergent plate margins is still an open question, let alone how the deformation might be partitioned. The project will be one of the first to critically explore this question. It focuses on Baja California Sur, in Mexico, as one of the best examples of an oblique divergent plate boundary, with one of the largest obliquities. If this study is successful, it will determine the rates of modern displacement of faults in the region, determine the average rates of displacement for the same structures over the last few million years, and ultimately establish what role the strain partitioning has in these strike-slip displacements.

9802792乌姆霍费尔斜辐合板块边缘的应变和变形分区是25年前提出的，随后在许多俯冲带的弧线中得到了确认。变形是否在发散的板块边缘被分割仍然是一个悬而未决的问题，更不用说变形如何被分割了。该项目将是第一个批判性地探索这个问题的项目之一。它的重点是墨西哥的下加利福尼亚南部，作为倾斜发散板块边界的最佳例子之一，具有最大的倾角之一。如果这项研究成功，它将确定该地区断层的现代位移率，确定过去几百万年来相同构造的平均位移率，并最终确定应变分配在这些走滑位移中所起的作用。