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Korff, Lucia; Von Dobeneck, Tilo; Frederichs, Thomas; Kasten, Sabine; Kuhn, Gerhard; Gersonde, Rainer; Diekmann, Bernhard. |
The carbonate-free abyss of the North Pacific defies most paleoceanographic proxy methods and hence remains a blank spot in ocean and climate history. Paleomagnetic and rock magnetic, geochemical, and sedimentological methods were combined to date and analyze seven middle to late Pleistocene northwest Pacific sediment cores from water depths of 5100 to 5700m. Besides largely coherent tephra layers, the most striking features of these records are nearly magnetite-free zones corresponding to glacial marine isotope stages (MISs) 22, 12, 10, 8, 6, and 2. Magnetite depletion is correlated with organic carbon and quartz content and anticorrelated with biogenic barite and opal content. Within interglacial sections and mid-Pleistocene transition glacial stages MIS... |
Tipo: Text |
Palavras-chave: Northwest Pacific Ocean; Carbon trapping; Magnetite dissolution; Mid-Pleistocene transition; Tephra layers; Abyssal sediments. |
Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00421/53247/54725.pdf |
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