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

• 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

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赫恩这个美洲计划奖将支持拉斯克鲁塞斯的新墨西哥州州立大学的托马斯赫恩博士和加拿大魁北克蒙特利尔理工学院的玛丽安马雷沙尔博士之间的研究合作。 他们建议沿着Lithoprobe Abitibi-Grenville地质断面部署一个被动源地震阵列，以补充地震反射剖面和大地电磁数据。 本研究的一个主要目的是检验地幔地震各向异性和地幔结构在该地区有关的元古代和太古代造山幕的假设。 该网站是一个合乎逻辑的地方，以测试这种假设，既因为可用的Lithoprobe数据，因为横断面位于加拿大盾的一部分，经历了重大的元古代和太古代变形。 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。 虽然Lithoprobe项目的重点是利用勘探技术调查地壳，但IRIS将提供其PASCAL便携式地震阵列，该阵列更适合调查上地幔结构。 加拿大小组将专注于旅行时间数据的分析，而美国小组将主要从事剪切波数据的分析。 ***