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Authors: Scalera, G.*
Editors: Scalera, Giancarlo; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia
Boschi, Enzo; University of Bologna
Cwojdzinski, Stefan; Polish Geological Survey
Title: Biogenic/Abiogenic Hydrocarbons Origin - Possible Role of Tectonically Active Belts
Publisher: Aracne Editrice, Roma
Issue Date: Dec-2012
ISBN: 978-88-548-5693-6
Keywords: Abiogenic hydrocarbons
Nonlithostatic overpressures
Origin of hydrocarbons
Earth’s expansion and
Abstract: The creation of hydrocarbons is linked to tectono-geologic processes and particularly to orogenesis, rifting, overthrusts, erosion, deposition of sediments, deep gas emissions, etc.. Many have claimed the inadequacy of plate tectonics in linearly explain a number of phenomena involved in hydrocarbons generation and geological processes, and many others have defended the synthesis of hydrocarbons starting from inorganic minerals, proposing di erent geochemical processes. In this paper a possible mechanism for production of abiogenic hydrocarbons is proposed, linking it to a previously proposed orogenic isostatic model. While in plate tectonics the cold slab travels in contact with the lithosphere of the continental side, oxidizing materials faced to oxidizing materials, in this model the hightemperature reducing environment of the undepleted mantle rises up and come in contact with the relatively cold oxidizing lithospheric environment. Non-lithostatic overpressures and a number of chemical reactions are then favoured in this sort of tectonic oxidizingreducing pile, leading to a multiple origin of the hydrocarbons. The actual situation along the Italian Apennines orogenic belt seems in accord to the proposed model in which an important role should have the abiogenic hydrocarbons in particular those produced by the tectonic working at the western margin of the Adriatic plate. However, albeit a continuous accumulation of abiogenic hydrocarbons is witnessed by a number of planetary bodies of the Solar system, still no evaluation of the abiogenic/biogenic hydrocarbons rate is possible on our planet.
Appears in Collections:Book chapters
04.04.12. Fluid Geochemistry
04.07.07. Tectonics
04.07.02. Geodynamics

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abs SCALERA petr.pdfContribution to the Section 'Geochemistry, Origin of Ore Deposits and Hydrocarbons'7.1 MBAdobe PDFView/Open

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