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

该项目是对冰岛北部近海Tjornes断裂带的初步研究，目的是论证在构造复杂的断裂带系统中绘制全新世断层和火山活动图的可行性。该项目将使用次扫描线性调频声纳系统和高分辨率多通道地震采集系统，以及常规的水深测绘。具体目标是确定沿断裂系统近海部分的走滑运动的当前位置和历史，估计过去1-2 Ma艾雅法尔达尔地块的延伸量，并研究南北地块构造如何在断裂带附近终止。如果成功，冰岛和美国计划对Tjornes断裂带和冰岛岛架的其他部分进行联合调查。这项研究的目的是确定Tjornes断裂带的应变分配，以重建该地区的陆上-近海变形历史。

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.