The Northwest Atlantic Mid-Ocean Channel of the Labrador Sea. IV. Petrography and provenance of the sediments
作者： Sung Kwun Chough , Reinhard Hesse , Jens Müller
DOI: 10.1139/E87-071
关键词: Basalt 、 Oceanography 、 Paleozoic 、 Geology 、 Abyssal plain 、 Terrigenous sediment 、 Paleontology 、 Canyon 、 Petrography 、 Provenance 、 Structural basin
摘要: The Northwest Atlantic Mid-Ocean Channel (NAMOC) of the Labrador Sea is associated with a 500 m thick sequence well-bedded turbidites along axis and Newfoundland basins extends onto western Sohm Abyssal Plain. specific source areas these terrigenous on shelves landmasses surrounding were not known hitherto because morphological connections in head region NAMOC canyons slope are masked by young ice-rafted bottom-current-transported sediments.Petrographic analysis channel sands gravels suggests dominant Canadian for segment north confluence Imarssuak (IMOC) based predominance lower Paleozoic detrital carbonates. IMOC provides sediment from sources around West Reykjanes Basin, i.e., east coast Greenland Iceland; however, source-specific minerals or rock fragments Tertiary alkali basalts southwest Greenla...
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