Organic geochemistry of sediment samples from Prydz Bay ...

• Main Authors: Kvenvolden, Keith A, Hostettler, Frances D, Rapp, John B, Frank, Tamara J
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1991
• Subjects: Drilling/drill rig; Leg119; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctica; East Antarctica; Prydz Bay
• Online Access: https://dx.doi.org/10.1594/pangaea.759888; https://doi.pangaea.de/10.1594/PANGAEA.759888

High molecular weight aliphatic hydrocarbons were extracted from sediments at two sites (741 and 742) drilled during Ocean Drilling Program Leg 119 in Prydz Bay, a major embayment on the continental shelf of East Antarctica. The distributions of n-alkanes and triterpenoid and steroid hydrocarbons suggest that the n-alkanes and steranes are mainly of terrestrial origin and that the hydrocarbons are immature to slightly mature in the Lower Cretaceous sediments and immature to mature in the Tertiary sediments. At Site 741, the Lower Cretaceous depositional sequence, which is generally characterized by immature hydrocarbons, is interrupted by sediment having more mature components, suggesting a change of source during part of Early Cretaceous time. At Site 742, the mature geochemical parameters of a Pliocene sample correlate with results reported elsewhere for Site 739. In all but one of the other Tertiary samples, the geochemical parameters indicate intermediate maturity. The Lower Cretaceous and Pliocene ... : Supplement to: Kvenvolden, Keith A; Hostettler, Frances D; Rapp, John B; Frank, Tamara J (1991): Aliphatic hydrocarbons in sediments from Prydz Bay, Antarctica. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 417-424 ...