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	Provedor de dados ArchiMer (2) Autor Arz, H. W. (1) Bahr, A. (1) Diekmann, Bernhard (1) Frederichs, Thomas (1) Gersonde, Rainer (1) Haug, G. H. (1) Kasten, Sabine (1) Korff, Lucia (1) Kuhn, Gerhard (1) Kwiecien, O. (1) Lamy, F. (1) Roehl, U. (1) Von Dobeneck, Tilo (1) Wulf, S. (1) Mais... Palavra-chave Tephra layers (2) Abyssal sediments (1) Calibration (1) Carbon trapping (1) Deglaciation (1) History (1) Magnetite dissolution (1) Mediterranean abyssal sediments (1) Mid-Pleistocene transition (1) Minoan eruption (1) Northwest Pacific Ocean (1) Radiocarbon (1) Resolution (1) Santorini (1) Variability (1) Mais... Tipo do documento Text (2) Ano 2016 (1) 2008 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Estimated reservoir ages of the Black Sea since the last glacial ArchiMer Kwiecien, O.; Arz, H. W.; Lamy, F.; Wulf, S.; Bahr, A.; Roehl, U.; Haug, G. H.. Accelerator mass spectrometry (AMS) radiocarbon dating of ostracod and gastropod shells from the southwestern Black Sea cores combined with tephrochronology provides the basis for studying reservoir age changes in the late-glacial Black Sea. The comparison of our data with records from the northwestern Black Sea shows that an apparent reservoir age of similar to 1450 C-14 yr found in the glacial is characteristic of a homogenized water column. This apparent reservoir age is most likely due to the hardwater effect. Though data indicate that a reservoir age of similar to 1450 C-14 yr may have persisted until the Bolling-Allerod warm period, a comparison with the GISP2 ice-core record suggests a gradual reduction of the reservoir age to similar to 1000 C-14... Tipo: Text Palavras-chave: Mediterranean abyssal sediments; Minoan eruption; Tephra layers; Radiocarbon; Santorini; Deglaciation; History; Variability; Calibration; Resolution. Ano: 2008 URL: https://archimer.ifremer.fr/doc/00209/31990/30430.pdf Cyclic magnetite dissolution in Pleistocene sediments of the abyssal northwest Pacific Ocean: Evidence for glacial oxygen depletion and carbon trapping ArchiMer 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 Registros recuperados: 2 Primeira ... 1 ... Última

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