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

[9526599克里斯滕森]ACCRETE项目是一项合作项目，旨在确定大陆是如何通过岩浆和地体增生而生长的，并研究这些过程的相关作用。该奖项是一个项目的一部分，该项目涉及为期三年的中中生代至中新生代大陆增生的地球物理和地质协调研究。其目标是建立一个四维（X，Y，Z和时间）的了解，以海岸山脉、不列颠哥伦比亚省和阿拉斯加东南部为基础的北美西北边缘部分的增生过程。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界的造山带的一个样带。1994年夏天，沿着这条样带进行了一个地球物理试验项目，结果获得了超过1700公里的新的海洋多通道地震（MCS），重力和磁数据，以及来自60个REFTEK地震仪的普通接收器。在这个高质量的地球物理数据库的基础上，首席研究人员提出了一组研究，旨在构建一个400公里的造山带横截面，穿过整个地壳，进入上地幔。要做到这一点，他们必须解决有关大陆地壳是如何在地壳增生过程中形成的基本问题。＊＊＊

9526599 Christensen 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. ***