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在西南极洲附近,从 Ross 海东部直到 Weddell 海,对这一片冰雪覆盖的大洋和制图学了解甚少的区域,已通过包括 ERS-1大地测量和波形数据等的卫星测高方法,获得了高解象的重力场。这一重力场展现了该区整个构造的结构,如代表由早期(65～83 Ma 前)太平洋-南极海底扩张而留下的断裂带的重力构造线,这一扩张将 Camp-bell 高原和新西兰大陆从西南极洲分离出来。这些构造线制约了板块运动的历史,证实了下述假设:南极洲分属两个性质不同的板块。它们的分离是在大约6Ma 前由于 Amundsen 海中拉伸的 Bellingshausen 板块边缘的活动造成的。
Near the West Antarctica, from the eastern part of the Ross Sea up to the sea of Weddell, little is known about this snow-covered ocean and cartography, which has been achieved by satellite altimetry methods including ERS-1 geodesy and waveform data Resolution of the gravity field. This gravitational field shows the structure of the whole tectonic structure in this area, such as the gravity tectonic line representing the fault zone left by the expansion of the early (65-83 Ma) Pacific-Antarctic seabed, which expands the Camp-bell plateau and New Zealand The mainland is separated from the West Antarctica. These structural lines constrain the history of plate movement and confirm the hypothesis that Antarctica belongs to two plates of different nature. Their separation was caused by activities around the edge of the Bellingshausen plate in the Amundsen sea stretching about 6 Ma.