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Citation:
Müller, C (2015): Sedimentology on two profiles from eastern Fram Strait. doi:10.1594/PANGAEA.844930,
Supplement to: Müller, Claudia (1995): Spätquartäre Sedimentationsprozesse in der östlichen Framstrasse. Diploma Thesis, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven & Fachbereich Geowissenschaften, Westfälische Wilhelms-Universität zu Münster, 84 pp, hdl:10013/epic.32119.d001
Abstract:
Detailed sedimentological and geochemical analyses were performed on sediments taken from two gravity cores (PS2118-2 and PS2121-4) and one surface sample (PS2121-2) from the eastern Fram Strait at 79°N to get informations about the paleoclimatic and paleoceanographic conditions through the last 35.000 years. The analyses comprise sand/silt/clay distribution, content of ice rafted debris, clay mineralogy, and measurements of carbonate, organic carbon, and nitrogen. The stratigraphy is based on oxygen isotope stages, 14C-dating, and correlation with other sediment cores from the eastern Fram Strait. The sediments from core PS2118-2 represent the time interval from middle isotope stage 3 to recent. The results can be summarized as follows: (1) During isotope stage 3 the Eastspitsbergen Current transports sediment-loaded icebergs in a seasonally open Fram Strait (SPIELHAGEN 1991). Because of a high content of smectite the source of these icebergs probably is Franz Josef Land. At the end of stage 3 HEBBELN (1991) supposes an influence of Atlantic water masses which might be connected with a maximum carbonate content. (2) At the beginning of isotope stage 2, a high content of ice-rafted debris as well as a high content of terrigenous organic carbon were recorded. This verifies the extension of the glaciers of Spitsbergen onto the continental shelf (HEBBELN 1991) and a maximum growth of the Barents Sea Icesheet (ELVERH01 et al., in press). During the last glacial maximum the high content of carbonate resulted from high aboundances of detrital fragments (limestone and dolomite) probably derived from Spitsbergen. The retreat of the glaciers at the end of stage 2 causes an increase in the content of ice rafted debris. At about 15.000 years B.P. a district melt-water signal appears and indicates the onset of deglaciation. This transition from the last glacial maximum to the recent interglacial (Termination I) is documented in decreasing values of d18O. (3) At least since the beginning of isotope stage 1 the inflow of warmer Atlantic water becomes important.
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Coverage:
Median Latitude: 79.025917 * Median Longitude: 9.363347 * South-bound Latitude: 79.024167 * West-bound Longitude: 6.616500 * North-bound Latitude: 79.026500 * East-bound Longitude: 10.749333
Date/Time Start: 1991-07-03T23:16:00 * Date/Time End: 1991-07-05T18:29:00
Event(s):
PS2118-2 (PS19/079) * * Latitude: 79.026500 * Longitude: 6.616500 * Date/Time: 1991-07-03T23:16:00 * Elevation: -1306.0 m * Penetration: 9 m * Recovery: 6.32 m * Location: Svalbard * * Campaign: ARK-VIII/2 (PS19 EPOS II) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) (SL) * * Comment: Lot 13m
PS2121-2 (PS19/082) * * Latitude: 79.024167 * Longitude: 10.715833 * Date/Time: 1991-07-05T15:43:00 * Elevation: -337.0 m * Penetration: 0.39 m * Recovery: 0.39 m * Location: Svalbard * * Campaign: ARK-VIII/2 (PS19 EPOS II) * * Basis: Polarstern * * Device: Giant box corer (GKG) *
PS2121-4 (PS19/082) * * Latitude: 79.026500 * Longitude: 10.749333 * Date/Time: 1991-07-05T18:29:00 * Elevation: -339.0 m * Penetration: 8 m * Recovery: 6.23 m * Location: Svalbard * * Campaign: ARK-VIII/2 (PS19 EPOS II) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) (SL) * * Comment: Lot 13m
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