Chemical composition of rocks and minerals from the Weddell Sea

Studied samples represent bedrock occurrences rather than products of transportation by floating ice. Two regions were distinguished: the East Antarctic margin (submarine Maud Ridge) characterized by intensive destruction and oceanization of the continental crust, and the northwestern part of the Weddell Sea (Powell Basin), where spreading processes are superimposed on the weakly destructed continental crust. Volcanic rocks of the Maud Ridge derive from an enriched mantle source. […]

研究样本代表基岩露头，而非浮冰搬运的产物。研究区分出两个区域：其一为东南极边缘（海底莫德海脊），以大陆地壳的强烈破坏与洋壳化为特征；其二为威德尔海西北部（鲍威尔盆地），此处扩张作用叠加于弱破坏的大陆地壳之上。莫德海脊的火山岩源自富集地幔源区。[…]