Continental drilling through the shallow Alpine fault, New Zealand

穿过新西兰阿尔卑斯浅断层的大陆钻探

• 批准号: 195285818
• 负责人: Professor Dr. Achim Kopf
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 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 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/195285818?language=en
• 关键词: Continental; drilling; through; shallow; Alpine

Gouge from seismogenic fault zones provide key information associated with earthquake mechanisms and were/are the focus of various ICDP initiatives. Most recently, the Alpine Fault, New Zealand, was subject to a pre-proposal to ICDP, which was followed by a workshop in March 2009, so that we now propose a low-budget pilot drill hole (300 m depth) to set the stage for future deep ICDP drilling through the fault in early 2011. The hole will be adjacent to a 300-m hole already funded by UK and NZ and would provide (i) extra core material for mineralogical-petrological studies of the fault zone and wall rock composition, (ii) whole round cores for geotechnical testing under seismogenic conditions (up to 200 MPa normal stress and 200°C), and (iii) an option for future long-term instrumentation and in situ monitoring. The approach will help to assess what has to be expected in the deep ICDP hole, whether the Alpine Fault gouge material is capable of generating large magnitude earthquakes, and what processes govern fault zone mineralogical alteration. In short, this low-cost drill hole will maximise the pilot study outcome and provide German researchers immediate access to this challenging ICDP deep drilling effort.

孕震断层带的断层泥提供了与地震机制相关的关键信息，并且是各种ICDP倡议的重点。最近，新西兰阿尔卑斯断层受到ICDP的预先建议，随后于2009年3月举行了一次研讨会，因此我们现在提出了一个低预算的试验钻孔（300米深），为2011年初通过断层的未来ICDP深钻奠定基础。该钻孔将与英国和新西兰已经资助的300米钻孔相邻，并将提供（i）断层带和围岩成分矿物岩石学研究的额外岩心材料，（ii）在孕震条件下（高达200 MPa正应力和200°C）进行岩土工程测试的完整圆形岩心，以及（iii）未来长期仪器和现场监测的选择。这种方法将有助于评估ICDP深孔中的预期，阿尔卑斯断层泥材料是否能够产生大规模地震，以及断层带矿物蚀变的过程。简而言之，这种低成本钻孔将最大限度地提高试点研究成果，并为德国研究人员提供立即进入这一具有挑战性的ICDP深钻工作的机会。