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

合作研究：累积：板块边缘收敛处大陆生长的综合研究

• 批准号: 9527395
• 负责人: Maria Crawford
• 金额: $ 24.96万
• 依托单位: Bryn Mawr College
• 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 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9527395&HistoricalAwards=false
• 关键词: Collaborative; Research; Accrete; Integrated; Study

9527395 Crawford 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. ***

9527395 Crawford ACCRETE 计划是一项合作项目，旨在确定大陆如何通过岩浆和地体增生而生长，并研究这些过程的相对作用。 该奖项是一个项目的一部分，该项目涉及对中生代至中新生代大陆增生的三年协调地球物理和地质研究。 目标是对沿着海岸山脉造山带、不列颠哥伦比亚省和阿拉斯加东南部的北美西北边缘部分的增生过程进行四维（X、Y、Z 和时间）理解。 具体来说，该项目涉及靠近不列颠哥伦比亚省和阿拉斯加边境的造山带横断面。 1994 年夏天，沿着该横断面的地球物理试点项目产生了超过 1700 公里的新海洋 MCS（多道地震）、重力和磁力数据，以及来自 60 个 REFTEK 地震仪的通用接收器数据。 在此高质量的地球物理数据库的基础上，首席研究员提出了一组研究，旨在构建穿过整个地壳并进入上地幔的 400 公里造山带横截面。 为了实现这一目标，他们必须解决有关大陆地壳在地体增生过程中如何形成的基本问题。 ***