U.S.-Canada: A Study of the Abitibi-Grenville Lithosphere by Teleseismic Analyses: Upper Mantle Anisotropy and Heterogeneity

美国-加拿大：通过远震分析对阿比蒂比-格伦维尔岩石圈进行的研究：上地幔各向异性和异质性

基本信息

批准号：
9322499
负责人：
Thomas Hearn
金额：
$ 1.56万
依托单位：
New Mexico State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1994
资助国家：
美国
起止时间：
1994-05-01 至 1998-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9322499&HistoricalAwards=false
关键词：
U.S.Canada Study Abitibi Grenville

项目摘要

29322499 Hearn This Americas Program award will support a research collaboration between Dr. Thomas Hearn of New Mexico State University, Las Cruces and Dr. Marianne Mareschal, Ecole Polytechnique, Montreal, Quebec, Canada. They propose to deploy a passive-source seismic array along the Lithoprobe Abitibi-Grenville Geologic Transect to complement seismic reflection profiles and magnetotelluric data. A primary goal of this study is to test the hypothesis that both mantle seismic anisotropy and mantle structure in the region are related to Proterozoic and Archean orogenic episodes. The site is a logical place to test such hypothesis, both because the available Lithoprobe data and because the transect lies over a portion of the Canadian shield that experienced major Proterozoic and Archean deformation. This project combines the expertise of Lithoprobe, Canada's national, earth science research project, with the unique capabilities provided by the U.S. Incorporated Research Institutions for Seismology (IRIS). While the Lithoprobe project has focused on investigating the crust using exploration techniques, IRIS will provide its PASCAL portable seismic array, which is more suited for investigating upper mantle structure. The Canadian group will focus on the analysis of travel time data, while the U.S. group will work primarily with the analysis of shear-wave data. ***

29322499 赫恩美洲计划奖将支持拉斯克鲁塞斯新墨西哥州立大学的 Thomas Hearn 博士和加拿大魁北克省蒙特利尔综合理工学院的 Marianne Mareschal 博士之间的研究合作。他们建议沿 Lithoprobe Abitibi-Grenville 地质横断面部署被动源地震阵列，以补充地震反射剖面和大地电磁数据。这项研究的主要目标是检验该地区地幔地震各向异性和地幔结构与元古代和太古代造山期有关的假设。该地点是检验这种假设的合乎逻辑的地方，既因为现有的岩石探测数据，又因为该样线位于经历了重大元古代和太古宙变形的加拿大地盾的一部分。该项目结合了加拿大国家地球科学研究项目 Lithoprobe 的专业知识和美国地震学研究机构 (IRIS) 提供的独特能力。 Lithoprobe 项目的重点是利用勘探技术来研究地壳，而 IRIS 将提供其 PASCAL 便携式地震阵列，该阵列更适合研究上地幔结构。加拿大小组将专注于旅行时间数据的分析，而美国小组将主要进行剪切波数据的分析。 ***