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; 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 HEARN这项美洲计划奖将支持新墨西哥州立大学的Thomas Hearn博士与加拿大魁北克蒙特利尔Ecole Polytechnique的Marianne Mareschal博士之间的研究合作。 他们建议沿着岩石螺旋桨abitibi-grenville地质样带部署一个被动源地震阵列，以补充地震反射曲线和磁磁数据。 这项研究的主要目的是检验以下假设：该区域的地幔地震各向异性和地幔结构都与proterorogic和Grendean造山学发作有关。 该站点是检验这种假设的逻辑场所，这既是因为可用的岩石螺旋桨数据，又是因为该横断面位于加拿大盾牌的一部分上，而加拿大盾牌经历了主要的proterorogic和Archean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，并结合了美国综合研究机构（IRIS）提供的独特功能。 尽管岩石杆螺旋桨项目的重点是使用勘探技术研究地壳，但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。 加拿大集团将重点关注旅行时间数据的分析，而美国组将主要与剪切波数据分析。 ***