Collaborative Research: Natural Seismicity Investigation of Active Continental Breakup in the Western Woodlark Basin

合作研究：西部伍德拉克盆地活动大陆裂解的自然地震活动调查

• 批准号: 9730824
• 负责人: John Mutter
• 金额: $ 34.97万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9730824&HistoricalAwards=false
• 关键词: Collaborative; Research; Natural; Seismicity; Investigation

Funds are being provided to study the seismicity of an active continental breakup in the western Woodlark Basin, offshore Papua New Guinea. Low-angle normal detachment is a fundamental process in passive margin evolution but conflicts with basic Andersonian tenet of frictional slip on faults. 24 to 35 degree low-angle slip planes are known in the continental crust of the Woodlark Basin and provides an opportunity to test the ideas of low-angle seismicity. A marine-land passive seismic experiment will be undertaken, focused on a region of high-localized strain. Seafloor instruments will be arraayed to record microseismicity and PASSCAL instruments will be deployed on surrounding islands to record regional seismicity. ODP driling will provide additional constraints on faulting.

正在提供资金，研究巴布亚新几内亚近海伍德拉克盆地西部大陆断裂活动的地震活动。 低角度正拆离作用是被动陆缘演化的基本过程，但与安德森关于断层摩擦滑动的基本原理相矛盾。 在伍德拉克盆地的大陆地壳中已知有24至35度的低角度滑动面，这为测试低角度地震活动性的想法提供了机会。 将进行一项海洋-陆地被动地震试验，重点放在局部应变高的区域。 海底仪器将被排列以记录微震活动，PASSCAL仪器将被部署在周围岛屿以记录区域地震活动。 ODP钻探将提供对断层的额外限制。