Antarctic Tectonics Evolution: CD-ROM

OPP 9615161劳弗和达尔齐尔摘要南极洲是地球上最孤立的大陆。除了南美地区外，它周围都是活跃扩张的海脊。南极洲是地球上唯一的冰川大陆，因此构成了地球环境中的一个独特元素。其板块边界的构造演化和南极板块内的地貌，控制了冰川开始之前和期间大陆周围和穿过大陆的海道的发展。除了它在当今行星环境中的独特作用和它在古生代和早中生代作为冈瓦拉兰多巨石的经典作用之外，南极洲在过去10亿年里，甚至在整个地球历史上，在全球动力学中发挥了重要作用。由于南极洲被冰覆盖，几乎没有人尝试过编制全大陆的地图。该奖项支持一项制作一套南极数字地质参考图的项目。新的南极板块构造图将包括：来自以前出版的地图、新论文和未出版资料来源的地质数据；陆地和海洋构造数据，包括根据地球卫星卫星重力数据得出的海底结构，以及海底年龄和扩散历史信息。此外，它将以冰下地形为基础。除了构造图外，还将制作一系列以南极洲为中心的重建图，从新元古代早期开始，一直持续到新生代。这些地图将以数字形式放在光盘上，以便其他人很容易复制和使用。数字信息的汇编格式将使今后的数据集能够很容易地添加到数据库中，并使旧数据能够很容易地更新、修改或丢弃。除上述地图外，光盘还将包括更新的冰层厚度和次冰层地形图的数字化版本，以及其他调查人员希望提供的现有数据档案。其他数据，如航空地球物理和古地磁数据，将在所附文本中单独章节，并在光盘上单独归档。将提供约1000份CD和所附文本，以支付邮费和手续费。可以分发更多的副本，以支付复制、邮费和手续费。

OPP 9615161 Lawver and Dalziel Abstract Antarctica is the Earth's most isolated continent. It is surrounded by actively spreading ridges except in the South American sector. Antarctica is the only glaciated continent on the planet, and as such constitutes a unique element in the Earth's environment. The tectonic evolution of its plate boundaries, and of features within the Antarctic plate, controlled development of the seaways around and through the continent prior to and during the onset of glaciation. In addition to its unique role in the present day planetary environment and its classic one as the Okeystone of GondwanalandO during Paleozoic and early Mesozoic times, Antarctica has played an important role in global dynamics over the past 1.0 billion years, and indeed throughout Earth history. Because Antarctica is ice covered, few continent-wide compilation maps have been attempted. This award supports a project to produce a set of digital geologic reference maps of the Antarctic. A new tectonic map of the Antarctic plate will incorporate: geological data, both from previously-published maps, from new papers and from unpublished sources; and terrestrial and marine tectonic data, including seafloor structure derived from Geosat satellite gravity data, and seafloor age and spreading history information. Moreover, it will be based on the sub-ice topography. In addition to a tectonic map, a series of reconstructions centered on Antarctica, starting with the early Neoproterozoic and continuing through to the Cenozoic will be produced. These maps will be presented in digital form on a CD-ROM, so that they can be easily reproduced and used by others. The digital information will be compiled in a format that will allow future data sets to be easily added to the database and to allow old data to be easily updated, modified or discarded. Besides the maps mentioned above, the CD-ROM will include digitized versions of updated ice-thickness and sub-ice top ography maps, and an archive of available data as other investigators wish to contribute. Other data, such as aerogeophysical and paleomagnetic data, would be covered with separate chapters in the accompanying text and separate files on the CD-ROM. About 1000 copies of the CD and accompanying text will be available for the cost of postage and handling. Further copies can be distributed for the cost of reproduction, postage and handling.