Collaborative Research on the Crustal Evolution of the Bering Shelf-Chukchi Sea Region

9317142自从板块构造出现以来，地球科学家越来越强调大陆地壳在地体增生和岩浆弧发育过程中侧向生长的重要性。北美的科迪勒拉造山带是这种地壳生长的主要例子之一，该带的阿拉斯加部分被认为几乎完全是由地体吸积过程建造的。这项研究将进行一项雄心勃勃的地质和地球物理横断面，横跨位于北极白令-楚科奇地区的科迪勒兰造山带最北部，位于阿拉斯加大陆和俄罗斯之间。研究的主要目的是使我们更深入地了解科迪勒式造山带下地壳的产生、演化和改造的细节，使我们更好地了解地壳深部和浅部的构造和岩石学过程之间的耦合，并帮助我们确定地壳和板块构造尺度上的过程之间的一般联系。该项目是斯坦福大学(Miller And Klemperer)、赖斯(Wright)、加州大学圣巴巴拉分校(Gans)和华盛顿西部(Engebretson)的研究人员共同努力的结果。该项目还涉及美国地质调查局太平洋海洋地质分部(Scholl，Childs)、阿拉斯加地质学(Grantz，Moore)和地震学(Brocher)分部的科学家，以及来自哈巴罗夫斯克(B.Natal‘in)、雅库茨克(L.Parfenov)和马加丹(M.Gelman)的三位俄罗斯著名科学家。***

9317142 Gans Since the advent of plate tectonics, earth scientists have increasingly emphasized the importance of the lateral growth of continental crust by the processes of terrane accretion and magmatic arc development. The Cordilleran orogen of North America is one of the prime examples of such crustal growth, and the Alaskan portion of this belt is considered to have been constructed almost entirely by the process of terrane accretion. This study will undertake an ambitious geological and geophysical transect across the northernmost portion of the Cordilleran orogen in the Bering-Chukchi region of the Arctic, between mainland Alaska and Russia. The main goals of the research are to provide us with greater insight into the details of the creation, evolution and modification of the crust beneath Cordilleran-style oroginic belts, to give us a better understanding of the coupling between tectonic and petrologic processes at deep and shallow crustal levels, and to help us determine the general links between processes at the scale of the crust and those at the plate tectonic scale. The project is a collaborative effort by researchers at Stanford (Miller and Klemperer), Rice (Wright), UC Santa Barbara (Gans), and Western Washington (Engebretson). The project also involves scientists from the USGS Branches of Pacific Marine Geology (Scholl, Childs), of Alaskan Geology (Grantz, Moore), and of Seismology (Brocher), and three well-known Russian scientists from Khabarovsk (B. Natal'in), Yakutsk (L. Parfenov) and Magadan (M. Gelman). ***