High resolution seismic tomography model of the Slave craton for diamond exploration targeting

用于钻石勘探目标的 Slave 克拉通高分辨率地震层析成像模型

• 批准号: 510223-2017
• 负责人: Audet, Pascal
• 金额: $ 1.64万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640193
• 关键词: resolution; seismic; tomography; model; Slave

Canada is one of the main producers of diamonds, which are a source of wealth for the country. Diamonds areformed at great depths beneath the surface (>150 km). Knowing where to look for diamonds therefore requiresthe ability to characterize the structure of the Earth where they form and get transported upward to the surface.This project aims to provide a three-dimensional seismic velocity model of the subsurface, down to >500 km,in a broad region in northwestern Canada that encompasses large and old parts of the continent, called theSlave Craton. This 3-D model will be obtained by analyzing the distribution of travel times of seismic wavesthat propagate from a source (i.e., any global earthquake) to a network of receivers (seismograph stations). Byanalyzing data for numerous earthquakes and using a large number of stations, our study will yield ahigh-resolution model of the 3-D seismic velocity structure in this region. The results will be used toinvestigate the links between subsurface structure and known diamond-producing regions, in order to find newexploration targets again using the 3-D model. This research will benefit Canada by helping find new diamondtargets and promote an important sector of the Canadian economy.

加拿大是钻石的主要生产国之一，钻石是该国的财富来源。钻石形成于地表以下较深处（>150 公里）。因此，要知道在哪里寻找钻石，就需要能够描述钻石形成和向上输送到地表的地球结构特征。该项目旨在提供加拿大西北部广阔地区地下（深达 500 公里以上）的三维地震速度模型，该地区涵盖了该大陆的大部分古老部分，称为奴隶克拉通。该 3D 模型将通过分析从震源（即任何全球地震）传播到接收器网络（地震台）的地震波传播时间的分布来获得。通过分析大量地震的数据并使用大量台站，我们的研究将产生该地区 3D 地震速度结构的高分辨率模型。结果将用于调查地下结构与已知钻石产区之间的联系，以便再次使用 3D 模型找到新的勘探目标。这项研究将帮助加拿大寻找新的钻石目标并促进加拿大经济的一个重要部门的发展，从而使加拿大受益。