Chemistry of organic matter of glacial and Cretaceous sediments from the Prydz Bay ...

• Main Authors: McDonald, Thomas J, Kennicutt, Mahlon C, Rafalska, Janina K, Fox, Richard G
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1991
• Subjects: Drilling/drill rig; Leg119; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctic; Antarctica; Prydz Bay
• Online Access: https://dx.doi.org/10.1594/pangaea.758521; https://doi.pangaea.de/10.1594/PANGAEA.758521

Organic matter in Miocene glacial sediments in Hole 739C on the Antarctic Shelf represents erosional recycled continental material. Various indications of maturity in bulk organic matter, kerogens, and extracts imply that an exposed section of mature organic carbon-rich material was present during the Miocene. Based on biomarker, n-alkane, and kerogen analysis, a massive diamictite of early Eocene/Oligocene age at Hole 739C contains immature organic matter. Visual and pyrolysis analyses of the kerogens suggest a predominance of terrestrial organic matter in all samples from Hole 739C. A reversal of thermal maturities, i.e., more-mature overlying less-mature sections, may be related to redeposition generated from glacial erosion.Siliciclastic fluviatile sediments of Lower Cretaceous age from Hole 741A were analyzed. The organic matter from this hole contains immature aliphatic and aromatic biomarkers as well as a suite of odd carbon number-dominated nalkanes. Visual examination and pyrolysis analysis of the ... : Supplement to: McDonald, Thomas J; Kennicutt, Mahlon C; Rafalska, Janina K; Fox, Richard G (1991): Source and maturity of organic matter in glacial and cretaceous sediments from Prydz Bay, Antarctica, Holes 739C and 741A. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 401-405 ...