Organic Carbon characterization from Hudson Bay sediments, determined by Rock Eval Pyrolysis
Ship: CCGS Amundsen CA
Principal Investigator: Feiyue Wang
Start Date: 27-09-2005
End Date: 27-10-2005
Citation: Hare, A.A., Kuzyk, Z.A., Macdonald, R.W., Sanei, H., Barber, D., Stern, G.A., Wang, F. 2014. Characterization of Sedimentary Organic Matter in Recent Marine Sediments from Hudson Bay, Canada, by Rock Eval Pyrolysis. Organic Geochemistry 68: 52-60.
Abstract: Sediment from Hudson Bay was collected with boxcores deployed from the CCGS Amundsen. The boxcores were immediately sectioned at 1 cm (top 10 cm), 2 cm (10 cm to 20 cm depth), or 5 cm (depth > 20 cm) intervals, and aliquoted for a variety of analyses. Sediment samples were then frozen (-20 Celsius) while onboard for approximately 1 month, followed by freeze-drying at the Freshwater Institute, Department of Fisheries and Oceans, Winnipeg, MB, Canada. Freeze-dried sediment was stored at room temperature in the dark. Rock Eval pyrolysis of freeze dried sediment samples was performed at the Geological Survey of Canada using a Rock Eval 6 pyrolysis. The purpose of this project was to evaluate the utility of information provided by Rock Eval analysis of recent marine sediments to characterize the sources and state of preservation of modern sedimentary organic matter. This type of characterization will permit improved interpretations of modern sedimentary organic matter from analyses by Rock Eval pyrolysis by validating interpretations based on kerogen (a mixture of organic chemical compounds that make up a portion of the organic matter in sedimentary rocks) characteristics, and by identifying ambiguous data characteristics that can be resolved through the use of companion elementary analyses.