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.

提案摘要 EAR0003401 (PH # 41x) 标题：北安纳托利亚断层 Karadere-Duzce 分支深度的几何形状和地震特性的高分辨率成像 PI 的：Y. Ben-Zion 和 D. Okaya，南加州大学这项研究将利用沿着该断层及其周围收集的近断层地震数据，对北安纳托利亚断层的 Karadere-Duzce 分支进行全面的高分辨率成像1999 年 8 月 17 日 Mw7.4 地震后 5.5 个月内的 Karadere-Duzce 破裂带，由 RAMP PASSCAL 地震台网测得。研究区横跨 1999 年 8 月 17 日和 11 月 12 日 M 7+ 断裂的重要构造东端和西端。研究将包括对以下类别研究的信息进行分析、解释和整合：（1）使用地震走时断层扫描进行区域成像； (2) 受损断层带物质在深处的几种可能的地震特征，包括各向异性、非线性波传播以及断层带困波和头波效应； (3) 记录的地震活动的高分辨率震源位置。研究的目标是：1）提供断层带深度的宽度、连续性和地震特性的高分辨率成像； 2) 建立(a)地表岩性和断层偏移量、(b)大地震破裂的时空模式、(c)深度微震活动模式和(d)深度受损断层带岩石特性之间的相关性由各种地震信号成像。研究结果将有助于更好地了解主要转换板块边界断裂带的性质和力学。所开发的集成方法将有助于应用于其他故障系统。