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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Organic Sedimentation in Warnbro Sound, Western Australia
Maurice A. Carrigy
ABSTRACT
Warnbro Sound is a small marine embayment of restricted circulation. The lithofacies consist of calcareous sands and silts, derived from pelagic foraminifera, clastic molluskan debris, etc., but with no terrigenous material. The sedimentary cycle is thus self-generating. Organic carbon and total nitrogen measurements have been correlated with bathymetry and sediment particle size, to show that the fine material corresponds to the depths (up to 10 fathoms), where hydrogen sulphide is observed and high organic carbon and nitrogen are concentrated. Thus an organic reserve is being developed within a partly barred basin, the barrier to which is a porous calcarenite and sand bar (5 fathoms) which would act as a logical reservoir for any potential petroleum development.
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