Depositional and Diagenetic Environments of the Triassic and Lower Jurassic Succession of Svalbard

摘要: Abstract Triassic and Lower Jurassic strata are found over large areas of the Svalbard archipelago. Both potential source reservoir rocks occur within this succession, a feature significance for petroleum exploration activities on nearby shelf areas. We will first present revised lithostratigraphical scheme succession then review depositional diagenetic histories major stratigraphic units framework. The entire is dominated by clastic sediments deposited in varying offshore to marginal marine environments relatively stable epicontinental platform. This lay between 45 degrees 60 N temperate climatic zone facies patterns have not been influenced any variation. Thickness variations seen (min. 250 m - max. 1200 m) can be directly related differential downwarping series NNW SSE trending fault lineaments; show similar but more complex pattern. Middle were generally transgressive sequence with intermittent coastal progradation from west. Upper sequences indicate deltaic progradations both west east, while Rhaetoliassic characterised condensed incomplete throughout archipelago; eastern do however most complete remains sedimentation. Diagenetic organic geochemical studies progress results discussed terms our sedimentational models.