Continental drilling through the shallow Alpine fault, New Zealand

产震断裂带的断层泥提供了与地震机制相关的关键信息，过去是各种ICDP倡议的重点。最近，新西兰的阿尔卑斯断裂带是ICDP的预提案，随后在2009年3月举行了一个研讨会，因此我们现在提出一个低预算的试点钻孔（300米深），为2011年初通过该断裂带的未来深层ICDP钻井奠定基础。该孔将与英国和新西兰已经资助的一个300米的孔相邻，并将提供(i)用于断裂带和围岩组成的矿物学-岩石学研究的额外岩心材料，（ii）在发震条件下（高达200 MPa的正常应力和200°C）进行岩土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在ICDP深孔中预期会发生什么，高山断层泥物质是否能够产生大震级地震，以及什么过程控制着断裂带的矿物学变化。简而言之，这种低成本的钻孔将使试点研究成果最大化，并为德国研究人员提供了具有挑战性的ICDP深钻工作的直接途径。

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.