Paleoseismologic Investigation of the North Anatolian Fault, Turkey: Towards a Long Term Record of Patterns of Strain Release in Time and Space

土耳其北安纳托利亚断层的古地震学调查：对时空应变释放模式的长期记录

• 批准号: 9980564
• 负责人: James Dolan
• 金额: $ 27.81万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9980564&HistoricalAwards=false
• 关键词: Paleoseismologic; Investigation; North; Anatolian; Fault

EAR-9980564This project will develop three high-resolution paleoseismologic trench sites on the central and eastern North Anatolian fault (NAF) in northern Turkey. These data will be used to begin construction of a space-time history of seismic moment release along the NAF during the past several thousand years (5 to 10 earthquake cycles). The space-time history will in turn be used to test various competing models of earthquake occurrence, with the ultimate goal of either supporting or rejecting basic claims about the physical mechanisms underlying these patterns. For example, do large earthquakes occur randomly in time, or are they quasi-periodic? Do ruptures tend to initiate and terminate at the same locations time after time? Do large earthquakes cluster in time? As yet, such paleoseismologic data sets exist for only a few faults around the world (e.g., Wahsatch and San Andreas). For scientific and logistical reasons, the NAF is one of the world's best faults on which to undertake such studies. The great length (1500 km), large cumulative slip (90 km), and rapid slip rate (~20 mm/yr) demonstrate that the NAF is comparable to other major continental strike-slip fault systems.

该项目将在土耳其北部的北安纳托利亚断层（NAF）中部和东部开发三个高分辨率的古地震海沟站点。这些数据将用于开始构建过去几千年（5到10个地震周期）沿NAF的地震矩释放的时空历史。时空历史将反过来被用来测试地震发生的各种相互竞争的模型，其最终目标是支持或拒绝关于这些模式背后的物理机制的基本主张。例如，大地震在时间上是随机发生的，还是准周期性的？破裂是否一次又一次地在相同的位置开始和结束？大地震会准时聚集吗？到目前为止，这样的古地震数据集只存在于世界上的几个断层（例如，瓦萨奇和圣安德烈亚斯）。出于科学和后勤方面的原因，NAF是世界上进行此类研究的最佳缺陷之一。大长度（1500 km）、大累计滑动量（90 km）和快速滑动速度（~20 mm/年）表明NAF与其他主要的大陆走滑断裂系统相当。