High Resolution Imaging of the Geometry and Seismic Properties of the Karadere-Duzce Branch of the North Anotolian Fault at Depth

北安诺托利亚断层 Karadere-Duzce 分支深度几何结构和地震特性的高分辨率成像

• 批准号: 0003401
• 负责人: Yehuda Ben-Zion
• 金额: $ 20.5万
• 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: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003401&HistoricalAwards=false
• 关键词: Resolution; Imaging; Geometry; Seismic; Properties

Abstract for proposal EAR0003401 (PH # 41x)Title: High Resolution Imaging of the Geometry and Seismic Properties of the Karadere-Duzce Branch of the North Anatolian Fault at DepthPI's: Y. Ben-Zion and D. Okaya, University of Southern CaliforniaThis research will conduct a comprehensive high resolution imaging of the Karadere-Duzce branch of the North Anatolia Fault, using near-fault seismic data collected along and around the Karadere-Duzce rupture zone during the 5.5 months following the Mw7.4 August 17, 1999, earthquake by a RAMP PASSCAL seismic network. The study area straddles the structurally important eastern and western ends of the August 17 and November 12, 1999, M 7+ ruptures. Research will include analysis, interpretation, and integration of information from the following categories of studies: (1) regional imaging using earthquake travel time tomography; (2) several possible seismic signatures of damaged fault zone material at depth including anisotropy, non-linear wave propagation, and fault zone trapped and head waves effects; and (3) high-resolution hypocenter locations of recorded seismicity. Goals of the research are: 1) providing high resolution imaging of width, continuity, and seismic properties of the fault zone at depth; and 2) establishing correlations between (a) lithology and fault offsets at the surface, (b) space-time patterns of large earthquake ruptures, (c) microseismicity patterns at depth, and (d) properties of damaged fault zone rock at depth as imaged by various seismic signals. Results of the research will contribute to a better understanding of properties and mechanics of major transform plate-boundary fault zones. The developed integrated methodology will be useful for applications to other fault systems.

提议EAR 0003401（ph＃41X）标题：北安纳托利亚北部北部北部故障的Karadere-duzce分支的几何形状和地震特性的高分辨率成像的摘要：在1999年8月17日MW7.4之后的5.5个月内，沿着坡道密封地震网络地震发生的5.5个月，在Karadere-Duzce破裂区域沿线及其周围收集。研究区域跨越了1999年8月17日和11月12日的结构上重要的东部和西端，M 7+破裂。研究将包括分析，解释和整合以下研究类别的信息：（1）使用地震旅行时间断层扫描的区域成像； （2）深度损坏的断层区材料的几个可能的地震特征，包括各向异性，非线性波传播以及被困的断层区和头部波效应； （3）记录的地震性的高分辨率低分子位置。研究的目标是：1）在深度处提供高宽度，连续性和地震特性的高分辨率成像； 2）建立（a）（a）在表面上的岩性和断层偏移之间的相关性，（b）大地震破裂的时空模式，（c）深度处的微吸引性模式，以及（d）（d）（d）受损的岩石在深度上受损的故障区域的特性，这些岩石是由各种地震信号成像的。该研究的结果将有助于更好地理解主要变换板边界断层区域的特性和力学。开发的集成方法将对其他故障系统的应用有用。