Abstract
An organic geochemical study of a homogeneous shale sequence of Mesozoic age at Agardhfjellet, Spitsbergen, in the Svalbard archipelago is reported. Analyses on the soluble extracts were undertaken together with visual kerogen and vitrinite reflectance analyses to estimate the maturity of the organic matter. The sequence is found to be in the “Oil Window”. Rock-Eval pyrolysis indicated that most of the Cretaceous samples contain type III kerogen, whereas the Jurassic samples contain mainly type II kerogen. A high production index for hydrocarbons was found for most of the samples. The variation in quantity and quality of the soluble extracts, with respect to changes in maturity, is discussed together with the effect that weathering might have had on some of the results.
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