Collaborative Research: Neotectonics across an active Oblique-Divergent Plate Margin, Southwestern Gulf of California

合作研究：加利福尼亚湾西南部活跃的斜发散板块边缘的新构造运动

• 批准号: 0505348
• 负责人: Paul Umhoefer
• 金额: --
• 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: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0505348&HistoricalAwards=false
• 关键词: Collaborative; Research; Neotectonics; across; active

The proposed research will quantify the partitioning of strain between the southern Baja California continental margin and the Gulf of California seafloor spreading system through a comprehensive survey of active fault locations and slip rates at 10 to 100,000 year time scales. It builds on the experience of the PIs in the region. The focus of study is a segment of the rift margin at La Paz Bay. Several approaches will be employed, including neotectonic mapping, onshore and offshore structural mapping, paleoseismology and geodesy. The goals are to determine to what extent is the plate margin strike-slip partitioned; why does the degree of partitioning change along strike along the margin and how has faulting changed over time? The project is a part of MARGINS "rupture of continental lithosphere" initiative. Work will be in collaboration with Mexican scientists and will contribute toward the understanding of earthquake hazards in the area.

拟议的研究将通过对10至10万年时间尺度上的活动断层位置和滑动速率的全面调查，量化下加利福尼亚州南部大陆边缘和加利福尼亚州海湾海底扩张系统之间的应变分配。它建立在该区域私人投资机构的经验基础上。研究的重点是拉巴斯海湾的一段裂谷边缘。将采用几种方法，包括新构造制图、陆上和近海构造制图、古地震学和大地测量学。目标是确定板块边缘走滑的分割程度；为什么分割程度沿边缘沿走向变化，断层随着时间的推移而变化？该项目是边缘“大陆岩石圈破裂”倡议的一部分。这项工作将与墨西哥科学家合作，并将有助于了解该地区的地震危险。