Organic geochemical parameters in sediment samples from the Weddell Sea (Table 2) ...

• Main Authors: Kvenvolden, Keith A, Horstettler, Frances D, Frank, Tamara J
• Format: Dataset
• Language: English
• Published: PANGAEA 1990
• Subjects: Event label; Sample code/label; -; Pristane/Phytane ratio; Ratio; Comment; Drilling/drill rig; DSDP/ODP/IODP sample designation; Leg113; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctica; Dronning Maud Land; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.754376; https://doi.pangaea.de/10.1594/PANGAEA.754376

Heavy hydrocarbons (~C15 + ) are ubiquitous but minor components in sediment from three sites (692, 693, and 694) drilled during Ocean Drilling Program (ODP) Leg 113. This preliminary report is the first to describe the distribution of some of these hydrocarbons in sediment of the Weddell Sea. Samples from Sites 692 and 693, located on a midslope bench along the margin of Dronning Maud Land, span a time interval from Early Cretaceous to Pleistocene. In our samples from the Tertiary portion of the record, having an average organic-carbon content of about 0.2%, n-alkanes are common and are characterized by populations that indicate both marine and terrigenous sources. The alpha beta-hopanes and aaa-steranes are minor components with isomer ratios indicating partial to full maturity. In contrast, our samples from the Cretaceous portion of the record, having an average organic carbon content of about 4%, contain mixtures of hydrocarbons in which n-alkanes are secondary in abundance to the isoprenoid ... : Supplement to: Kvenvolden, Keith A; Horstettler, Frances D; Frank, Tamara J (1990): Hydrocarbons in sediment of the Weddell Sea, Antarctica. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 199-208 ...