Tectonic Evolution of the Antarctic Sector of the Pacific Margin II: Mesozoic and Paleozoic Development of Eastern Marie Byrd Land

西南极的构造演化及其与东南极的关系是南极大陆最基本的构造问题。它与全球板块相互作用、南大洋古环流、古环境和古生物地理有关，对大陆本身的发展也是至关重要的。美国-联合王国的西南极构造项目(1983-1988年)揭示了威德尔海区域的构造演化。该奖项支持美国-新西兰-英国三方1990-93年在马里伯德岛的研究计划，以完成我们对太平洋盆地南缘构造演化的理解。它将涉及实地和实验室调查，旨在阐明玛丽·伯德陆壳地块的结构和演化及其与其他西南极地壳地块、东南极克拉通、新西兰和太平洋盆地的关系。这项研究是美国对该计划的主要贡献，涉及构造、古地磁、岩石学和地质年代学调查，特别是与玛丽·伯德土地的前新生代发展有关的调查。

The tectonic evolution of West Antarctica and its relationship to East Antarctica is the most fundamental tectonic problem of the Antarctic continent. It bears on global plate interaction, paleocirculation in the Southern Ocean, paleoenvironment, and paleobiogeography as well as being critical to the development of the continent itself. The joint United States-United Kingdom West Antarctic Tectonics Project (1983-88) has shed considerable light in the tectonic evolution of the Weddell Sea region. This award supports a new tripartite United States-New Zealand- United Kingdom program of the study in Marie Byrd Land for the years 1990-93 to complete our understanding of the tectonic evolution of the southern rim of the Pacific Ocean basin. It will involve field and laboratory investigations designed to elucidate the structure and evolution of Marie Byrd Land crustal block and its relationship to other West Antarctic crustal block, the East Antarctic craton, New Zealand and the Pacific Ocean basin. This study is the major U.S. contribution to the program and involves structural, paleomagnetic, petrologic, and geochronologic investigations bearing particularly on the pre-Cenozoic development of Marie Byrd Land.