Seismic site characterization - Alpine Fault drilling project

地震现场表征 - 高山断层钻探项目

基本信息

批准号：
194282287
负责人：
Professor Dr. Stefan Buske
金额：
--
依托单位：
Institut für Geophysik und Geoinformatik
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/194282287?language=en
关键词：
Seismic site characterization Alpine Fault

项目摘要

The Alpine Fault (South Island, New Zealand) is one of the largest active fault zones on earth. It ruptures every 200-400 years in a magnitude ~7.9 earthquake, and is thought to have last ruptured in AD 1717, which implies a significant geohazard potential. In addition to its seismic hazard, the Alpine Fault constitutes an internationally significant natural laboratory for research into how active plate-bounding continental faults work and, in particular, the nature of earthquake generation. The "Deep Fault Drilling Project - Alpine Fault (DFDP-AF) proposes to drill, sample, and monitor the Alpine Fault at depth, to take advantage of excellent surface exposures and the relatively shallow depths of geological transitions, and hence to better understand fundamental processes of rock deformation, seismogenesis (earthquake initiation and rupture), and earthquake deformation. Key to the viability of this planned drilling operation is an improved knowledge of the detailed geometry and structure of the Alpine Fault, especially at the depths which the proposed drilling operation might target. We propose to process existing and newly acquired active and passive seismic data sets to determine the geometry and structure of the Alpine Fault system. The principal results will be high-resolution images of the fault zone structure at depth, which will serve primarily as a seismic site characterization study for the detailed selection of the DFDP-AF drill site as well as for a better understanding of the tectonic and geodynamic setting. Subsequently the results can also be used by other researchers for reliable assessment of the related geohazard, providing an important basis for most of the associated DFDP-AF research groups.

高山断层（新西兰南岛）是地球上最大的活动断层区之一。它每200 - 400年破裂，幅度为7.9次地震，被认为最后一次破裂在1717年，这意味着地质灾害的巨大潜力。除了其地震危险外，高山断层还构成了国际上重要的自然实验室，用于研究围绕板块的大陆断层，尤其是地震产生的性质。 “深层故障钻探项目-Alpine断层（DFDP -AF）提议在深度钻孔，采样和监测高山故障，以利用出色的表面暴露和相对较浅的地质过渡深度，从而更好地理解基本岩石变形的过程，地震发生（地震起始和破裂）和地震变形的过程。可能是我们的目标。作为详细选择DFDP-AF钻头位点的地震场所表征研究，以及更好地了解构造和地球动力学环境。随后，其他研究人员也可以使用这些结果来可靠地评估相关的地质扎华，这为大多数相关的DFDP-AF研究小组提供了重要的基础。