Collaborative Research: Wide Angle Reflection and Potential Field Modeling of the Eastern Tennessee Seismic Zone

合作研究：田纳西州东部地震带的广角反射和位场建模

• 批准号: 9628813
• 负责人: Christine Powell
• 金额: $ 2.9万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628813&HistoricalAwards=false
• 关键词: Collaborative; Research; Wide; Angle; Reflection

9628813 Powell This research involves seismic and potential-field investigations to improve resolution of seismogenic crustal features in basement rocks below the Paleozoic thrust sheets in eastern Tennessee. The Eastern Tennessee Seismic Zone (ETSZ) is a pronounced zone of earthquake activity in a region 300 by 50 km with earthquake hypocenters extending from 5 to 25 km in depth. The zone produces the second highest release of seismic strain energy east of the Rocky Mountains and is unique in that it is associated with regional-scale potential-field (gravity and magnetic) anomalies. Seismic recording of quarry blasts will be done to test the feasibility of this technique for the study of crustal structure. Concurrently, analysis and inversion of existing potential field data will be done. Seismic and potential-field data analysis will be integrated to provide a better understanding of structures responsible for earthquakes within the region and outline the best approach for further efforts. This research is a component of the National Earthquake Hazard Reduction Program. ***

9628813鲍威尔这项研究涉及地震和位场调查，以提高田纳西州东部古生代逆冲断块下方基岩中孕震地壳特征的分辨率。田纳西东部地震带(ETSZ)是一个明显的地震活动区，该地区的地震面积为300×50公里，地震震源深度从5到25公里。该带产生落基山脉以东第二高的地震应变能释放，其独特之处在于它与区域规模的位场(重力和磁力)异常有关。将对采石场爆破进行地震记录，以验证该技术用于地壳结构研究的可行性。同时，还将对现有位场数据进行分析和反演。将综合进行地震和位场数据分析，以便更好地了解该区域内造成地震的构造，并勾勒出进一步努力的最佳办法。这项研究是国家减少地震灾害计划的一部分。***