Upper Triassic (Rhaetic) Argillaceous Sequences in Northern Italy: Depositional Dynamics and Source Potential
Published:January 01, 1990
Marco Stefani, Mark Burchell, 1990. "Upper Triassic (Rhaetic) Argillaceous Sequences in Northern Italy: Depositional Dynamics and Source Potential", Deposition of Organic Facies, A. Y. Huc
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Upper Triassic (Rhaetic), thick, argillaceous deposits are the source of important Italian hydrocarbon accumulations. This study integrates sedimentology, paleoecology, and both organic and inorganic geochemistry to determine the genesis and source potential of these marine deposits, which are ascribed to two depositional sequences. The first Rhaetic transgression was associated with an interruption of carbonate production and with a strong increase in the preservation of organic carbon. Deposition of these sequences was controlled by interactions between carbonate and terrigenous sediment sources, under the influence of high-frequency eustatic fluctuations. Most of these organic-rich Rhaetic successions are presently overmature and appear to...
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Deposition of Organic Facies
A great variety of organic-bearing sediments are acting as source rocks for the economic accumulations of hydrocarbons trapped in the subsurface. The occurrence of organic-rich intervals; their place in the stratigraphic column, their lateral extent, and the variation in their quality both stratigraphically and laterally are key parameters to be considered if one wants to evaluate the petroleum potential of a sedimentary basin. The purpose of this volume is to present recent advances in organic sedimentology. The 14 papers herein discuss a wide range of aspects of this field of research. The diverse nature of these papers includes modern environments, considered as present-day analogs of source rock formation; numerical modeling of paleoproductivity; and studies related to specific time periods during which organic matter accumulation has been particularly impressive.