Collaborative Research: ACCRETE: An Integrated Study of Continental Growth at a Convergent to Transpressive Plate Margin

合作研究：ACCRETE：板块边缘收敛处大陆生长的综合研究

• 批准号: 9526613
• 负责人: Akhaury Sinha
• 金额: $ 9.37万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526613&HistoricalAwards=false
• 关键词: Collaborative; Research; ACCRETE; Integrated; Study

9526613 Sinha The ACCRETE program is a collaborative endeavor to determine how continents grow by magmatic and terrane accretion, and to investigate the relative roles of these processes. This award is part of a project which involves a three year coordinated geophysical and geological study of mid-Mesozoic to mid-Cenozoic continental growth by accretion. The goal is to develop a four dimensional (X,Y,Z,and time) understanding of accretionary processes along the portion of the northwestern margin of North America underlain by the Coast Mountains orogen, British Columbia and southeastern Alaska. Specifically, the project involves a transect of the orogen close to the British Columbia-Alaska border. A geophysical pilot project along this transect in the summer of 1994 resulted in over 1700 km of new marine MCS (Multi-Channel Seismic), gravity and magnetic data, and common receiver gathers from 60 REFTEK seismometers. Building on the high quality of this geophysical data base, the Principal Investigators propose a group of studies designed to construct a 400 km cross section of the orogen through the entire crust and into the upper mantle. To accomplish this, they must resolve fundamental questions regarding how continental crust is formed during terrane accretion. ***

9526613辛哈共生计划是一项合作努力，旨在确定大陆是如何通过岩浆和地体的吸积作用成长的，并调查这些过程的相关作用。该奖项是一个项目的一部分，该项目涉及一项为期三年的中-中生代-中新生代大陆增长的地球物理和地质协同研究。其目标是对北美西北边缘海岸山脉造山带、不列颠哥伦比亚省和阿拉斯加东南部下方的北美西北边缘部分的吸积过程发展一个四维(X、Y、Z和时间)的理解。具体地说，该项目涉及靠近不列颠哥伦比亚省-阿拉斯加边界的一条造山带样带。1994年夏季，该断面的一项地球物理试验项目产生了1700多公里的新海洋MCS(多道地震)、重磁数据和来自60台REFTEK地震仪的公共接收器道集。在这个高质量的地球物理数据库的基础上，首席调查人员提出了一组旨在构建400公里横截面的造山带穿过整个地壳并进入上地幔的研究。要做到这一点，他们必须解决有关陆壳在地体吸积过程中如何形成的根本问题。***