Organic carbon concentrations in ODP Hole 105-645E

• Main Authors: ten Haven, H Lo, Rullkötter, Jürgen
• Format: Dataset
• Language: English
• Published: PANGAEA 1989
• Subjects: 105-645E; AGE; Baffin Bay; Carbon; organic; total; DEPTH; sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Epoch; Joides Resolution; Leg105; Lithologic unit/sequence; Ocean Drilling Program; ODP; Sample code/label; Baffin
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.744823; https://doi.org/10.1594/PANGAEA.744823

The aliphatic hydrocarbon fractions of eight early Miocene to Pliocene sediment samples from Hole 645E (Baffin Bay; ODP Leg 105) were investigated by gas chromatography and gas chromatography/mass spectrometry. Long, straight-chain alkanes of terrigenous origin are often present as major compounds. Other terrigenous biological markers include three oleanenes with a double bond at positions 12, 13(18), or 18, and taraxer-14-ene. Urs-12-ene is identified tentatively. In the three deepest samples, 17a(H), 18a(H), and 210(H)-28, 30-bisnorhopane is the most abundant compound. Several new compounds were detected, some of which are tentatively identified. The identification and possible significance of 23-norlupane, three A/B-ring nuclear demethylated (or A-nor-) oleanenes, and an A/B-ring nuclear demethylated (or A-nor-) urs-12-ene are discussed. The authors postulate that taraxer-14-ene isomerizes to olean-12-ene with increasing burial depth.