Nederbragt, Alexandra J; Thurow, Juergen W (2001): Sediment color variation in laminated Holocene sediments of ODP Site 178-1098. PANGAEA, https://doi.org/10.1594/PANGAEA.735289, Supplement to: Nederbragt, AJ; Thurow, JW (2001): Sediment color variation and annual accumulation rates in laminated Holocene sediments, Site 1098, Palmer Deep. In: Barker, PF; Camerlenghi, A; Acton, GD; Ramsay, ATS (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 178, 1-20, https://doi.org/10.2973/odp.proc.sr.178.209.2001
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Continuous sediment color records with a resolution of one measurement per millimeter were generated for Site 1098 (Palmer Deep, Antarctic Peninsula) from digital images of the core surfaces to test if the laminated intervals at this site will allow for analysis of high-frequency climate variability in the Circum-Antarctic. Long-term variation in color values correlates with gamma-ray attenuation bulk density. Darker colors are found in laminated intervals with lower bulk density, high biogenic silica, and high total organic carbon content. Darker color values result from the addition of dark laminae to background sediments that show little variation in color. The thicknesses of dark and light laminae were measured in the top 25 meters composite depth to determine the temporal resolution of the laminae. The alternation between dark, biogenic-rich laminae and background sediment essentially represents an annual cycle, but the sediment is not consistently varved. The modal thickness of light laminae is close to the long-term average annual accumulation rate, and results indicate that approximately half of the dark/light couplets in distinctly laminated intervals represent a single year. Missing biogenic laminae are interpreted to represent reduced primary productivity during cold years with delayed breakup of the sea-ice cover.
Median Latitude: -64.861940 * Median Longitude: -64.207887 * South-bound Latitude: -64.862060 * West-bound Longitude: -64.208000 * North-bound Latitude: -64.861830 * East-bound Longitude: -64.207810
Date/Time Start: 1996-03-12T15:30:00 * Date/Time End: 1998-03-13T00:00:00
178-1098A * Latitude: -64.862060 * Longitude: -64.207850 * Date/Time Start: 1996-03-12T15:30:00 * Date/Time End: 1998-03-12T23:15:00 * Elevation: -1012.0 m * Penetration: 45.9 m * Recovery: 45.78 m * Location: Drake Passage * Campaign: Leg178 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 7 cores; 45.9 m cored; 0 m drilled; 99.7 % recovery
178-1098B * Latitude: -64.861930 * Longitude: -64.208000 * Date/Time: 1998-03-13T00:00:00 * Elevation: -1010.6 m * Penetration: 43 m * Recovery: 44.66 m * Location: Drake Passage * Campaign: Leg178 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 43 m cored; 0 m drilled; 103.9 % recovery
178-1098C * Latitude: -64.861830 * Longitude: -64.207810 * Date/Time: 1998-03-13T00:00:00 * Elevation: -1010.4 m * Penetration: 46.7 m * Recovery: 46.3 m * Location: Drake Passage * Campaign: Leg178 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 46.7 m cored; 0 m drilled; 99.1 % recovery
Datasets listed in this publication series
- Nederbragt, AJ; Thurow, JW (2001): (Table T1) Digital image color data of ODP Hole 178-1098A. https://doi.org/10.1594/PANGAEA.131155
- Nederbragt, AJ; Thurow, JW (2001): (Table T2) Digital image color data of ODP Hole 178-1098B. https://doi.org/10.1594/PANGAEA.131153
- Nederbragt, AJ; Thurow, JW (2001): (Table T3) Digital image color data of ODP Hole 178-1098C. https://doi.org/10.1594/PANGAEA.131154