Pilot Study of the Tjornes Fracture Zone on Northern Iceland's Insular Margin Using High-Resolution, Multibeam Bathymetry, Seismic Reflection and Side-Scan Sonar

利用高分辨率、多波束测深、地震反射和侧扫声纳对冰岛北部岛缘 Tjornes 断裂带进行初步研究

• 批准号: 0114357
• 负责人: Robert Detrick
• 金额: $ 8.37万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0114357&HistoricalAwards=false
• 关键词: Pilot; Study; Tjornes; Fracture; Zone

The project is a pilot study of the Tjornes fracture zone offshore northern Iceland with the goal of demonstrating the feasibility of mapping Holocene faulting and volcanic activity in the tectonically complex fracture zone system. The project will use a SUBSCAN chirp sonar system and a high-resolution multicchannel seismic acquisition system, together with conventional bathymetric mapping. Specific objectives are to determine the current location and history of strike-slip movement along the offshore portion of the fracture system, to estimate the amount of extension of the Eyjafjardarall graben over the past 1-2 Ma, and to examine how the north-south graben structures terminate near the fracture zone. If successful, a joint Iceland-US investigation of the Tjornes fracture zone and other portions of Iceland's insular shelf are planned. The overaching goal of this research is to define strain partitioning in the Tjornes fracture zone in order to reconstruct the onshore-offshore deformation history of the region.

该项目是冰岛北部近海Tjornes断裂带的试点研究，目的是证明在构造复杂的断裂带系统中绘制全新世断裂和火山活动地图的可行性。该项目将使用SUBSCAN啁啾声纳系统和高分辨率多通道地震采集系统，以及传统的水深测绘。具体目标是确定断裂系统离岸部分走滑运动的当前位置和历史，估计过去1-2 Ma Eyjafjardarall地堑的伸展量，并研究南北地堑构造如何在断裂带附近终止。如果成功，冰岛和美国将联合对Tjornes断裂带和冰岛岛架的其他部分进行调查。本研究的首要目标是确定Tjornes断裂带的应变分配，以重建该地区的陆-海变形历史。