Age determination, Beryllium analysis, and mineral composition of two sediment cores of the Arctic Ocean covering the past 350 kyr
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| Autores principales: | , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
1997
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| _version_ | 1867169497267306496 |
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| author | Aldahan, Ala Ning, Shi Possnert, Göran Backman, Jan Boström, Kurt |
| author_facet | Aldahan, Ala Ning, Shi Possnert, Göran Backman, Jan Boström, Kurt |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Records of 10Be, 9Be, mineralogy and grain size were obtained from two cores collected by the Polarstern Expedition 1991 in the southern Nansen Basin (PS2213-6) and the Yermak Plateau (PS2208-2). The accumulation of sediments examined started from about 350 kyr (BP), and includes relatively well defined trends of Be isotopes coincident with interglacial/glacial climatic cycles. Sediment accumulation rates (g/cm**2/kyr) were higher during glacial periods and our estimates of 1.0 and 2.5 cm/kyr sedimentation rates during the Holocene agree with other estimates for the southern Nansen Basin and the Yermak Plateau, respectively. The variations in 10Be concentration (atoms/g) and flux (atoms/cm**2/kyr) are inverse to sediment flux, where high 10Be concentration and flux are associated with generally low sedimentation/accumulation rates during interglacial periods. We hypothesize that climate plays an important role in 10Be records from the Arctic sediments, reflecting the intensity and distribution of the ice mass on land and the ocean. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_696118 |
| institution | PANGAEA |
| language | en |
| publishDate | 1997 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age determination, Beryllium analysis, and mineral composition of two sediment cores of the Arctic Ocean covering the past 350 kyr Aldahan, Ala Ning, Shi Possnert, Göran Backman, Jan Boström, Kurt ARK-VIII/3; Giant box corer; Giant piston corer; GKG; GPC; Nansen Basin; Polarstern; PS19/234; PS19/246; PS19 ARCTIC91; PS2208-2; PS2213-2; PS2213-6; Yermak Plateau Records of 10Be, 9Be, mineralogy and grain size were obtained from two cores collected by the Polarstern Expedition 1991 in the southern Nansen Basin (PS2213-6) and the Yermak Plateau (PS2208-2). The accumulation of sediments examined started from about 350 kyr (BP), and includes relatively well defined trends of Be isotopes coincident with interglacial/glacial climatic cycles. Sediment accumulation rates (g/cm**2/kyr) were higher during glacial periods and our estimates of 1.0 and 2.5 cm/kyr sedimentation rates during the Holocene agree with other estimates for the southern Nansen Basin and the Yermak Plateau, respectively. The variations in 10Be concentration (atoms/g) and flux (atoms/cm**2/kyr) are inverse to sediment flux, where high 10Be concentration and flux are associated with generally low sedimentation/accumulation rates during interglacial periods. We hypothesize that climate plays an important role in 10Be records from the Arctic sediments, reflecting the intensity and distribution of the ice mass on land and the ocean. |
| title | Age determination, Beryllium analysis, and mineral composition of two sediment cores of the Arctic Ocean covering the past 350 kyr |
| topic | ARK-VIII/3; Giant box corer; Giant piston corer; GKG; GPC; Nansen Basin; Polarstern; PS19/234; PS19/246; PS19 ARCTIC91; PS2208-2; PS2213-2; PS2213-6; Yermak Plateau |
| url | https://doi.org/10.1594/PANGAEA.696118 |