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Stein, Ruediger; Fahl, Kirsten (2013): Biomarker proxies on ODP Holes 151-912A and 151-912B. PANGAEA,, Supplement to: Stein, R; Fahl, K (2013): Biomarker proxy shows potential for studying the entire Quaternary Arctic sea ice history. Organic Geochemistry, 55, 98-102,

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A novel and promising biomarker proxy for reconstruction of Arctic sea ice conditions was developed and is based on the determination of a highly branched isoprenoid with 25 carbons (IP25). IP25 records have been restricted to the last 150 kyr BP. We present a biomarker record from Ocean Drilling Program (ODP) Site 912, going back to the Pliocene–Pleistocene boundary and indicating that sea ice of variable extent occurred in the Fram Strait/southern Yermak Plateau area at least since about 2.2 Ma. Furthermore, our data support the idea that a combination of IP25 and open water, phytoplankton biomarker data (“PIP25 index”) may give a more reliable and quantitative estimate of past sea ice cover (at least for the study area). The study reveals that the novel IP25/PIP25 biomarker approach has potential for semi-quantitative paleo-sea ice studies covering the entire Quaternary and could motivate further detailed high resolution research on ODP/IODP material using this proxy.
Median Latitude: 79.959050 * Median Longitude: 5.456300 * South-bound Latitude: 79.958900 * West-bound Longitude: 5.456000 * North-bound Latitude: 79.959200 * East-bound Longitude: 5.456600
Date/Time Start: 1993-08-27T13:45:00 * Date/Time End: 1993-08-28T20:17:00
Minimum DEPTH, sediment/rock: 3.000 m * Maximum DEPTH, sediment/rock: 133.100 m
151-912A * Latitude: 79.959200 * Longitude: 5.456000 * Date/Time Start: 1993-08-27T13:45:00 * Date/Time End: 1993-08-28T09:37:00 * Elevation: -1050.0 m * Penetration: 145.4 m * Recovery: 118.37 m * Location: North Greenland Sea * Campaign: Leg151 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 145.4 m cored; 0 m drilled; 81.4 % recovery
151-912B * Latitude: 79.958900 * Longitude: 5.456600 * Date/Time Start: 1993-08-28T09:37:00 * Date/Time End: 1993-08-28T20:17:00 * Elevation: -1049.0 m * Penetration: 40.5 m * Recovery: 41.77 m * Location: North Greenland Sea * Campaign: Leg151 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 40.5 m cored; 0 m drilled; 103.1 % recovery
170 data points

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