Bulk geochemical and Rock-Eval data of sediment core IKU-7430/10-U-01 (Table 1)

• Main Authors: Langrock, Uwe, Stein, Ruediger, Lipinski, Marcus, Brumsack, Hans-Jürgen
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: AWI_Paleo; Calcium carbonate; Calculated; Carbon; organic; total; Carbon/Nitrogen ratio; Carbon/sulfur ratio; Carbon dioxide yield; S3 per unit sediment mass; DEPTH; sediment/rock; DRILL; Drilling/drill rig; Element analyser CHN; LECO; Element analyser CHN-O Rapid; Heraeus; Hydrocarbon yield; S1 per unit sediment mass; S2 per unit sediment mass; Hydrogen index; mass HC; per unit mass total organic carbon; IKU-7430/10-U-01; Nitrogen; Oxygen index; mass CO2; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Pyrolysis temperature maximum; Rock eval pyrolysis (Behar et al.; 2001); Sulfur; Barents Sea; Hekkingen; Berichte zur Polar- und Meeresforschung; Reports on Polar and Marine Research
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.143840; https://doi.org/10.1594/PANGAEA.143840

The late Volgian (early "Boreal" Berriasian) sapropels of the Hekkingen Formation of the central Barents Sea show total organic carbon (TOC) contents from 3 to 36 wt%. The relationship between TOC content and sedimentation rate (SR), and the high Mo/Al ratios indicate deposition under oxygen-free bottom-water conditions, and suggest that preservation under anoxic conditions has largely contributed to the high accumulation of organic carbon. Hydrogen index values obtained from Rock-Eval pyrolysis are exceptionally high, and the organic matter is characterized by well-preserved type II kerogen. However, the occurrence of spores, freshwater algae, coal fragments, and charred land-plant remains strongly suggests proximity to land. Short-term oscillations, probably reflecting Milankovitch-type cyclicity, are superimposed on the long-term trend of constantly changing depositional conditions during most of the late Volgian. Progressively smaller amounts of terrestrial organic matter and larger amounts of marine organic matter upwards in the core section may have been caused by a continuous sea-level rise.