Publication Date:
2017-04-04
Description:
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.
Description:
Published
Description:
463-475
Description:
3.2. Tettonica attiva
Description:
3.3. Geodinamica e struttura dell'interno della Terra
Description:
4.5. Studi sul degassamento naturale e sui gas petroliferi
Description:
open
Keywords:
Abiogenic hydrocarbons
;
Nonlithostatic overpressures
;
Origin of hydrocarbons
;
Earth’s expansion and
;
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
;
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics
;
04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
book chapter
Permalink
