A coupled petrological-tectonic model for sedimentary basin evolution: the influence of metamorphic reactions on basin subsidence

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Serval ID
serval:BIB_D45163E35BCF
Type
Article: article from journal or magazin.
Collection
Publications
Title
A coupled petrological-tectonic model for sedimentary basin evolution: the influence of metamorphic reactions on basin subsidence
Journal
Terra Nova
Author(s)
Petrini K., Connolly J.A.D., Podladchikov Y.Y.
ISSN-L
0954-4879
Publication state
Published
Issued date
2001
Peer-reviewed
Oui
Volume
13
Pages
354-359
Language
english
Abstract
The lithosphere is subject to fluctuations in temperature and pressure
during the formation of sedimentary basins. These fluctuations cause
metamorphic reactions that change the density of the lithosphere, which,
in turn, influences basin subsidence. This contribution develops a model
for sedimentary basin formation to assess the importance of this
coupling. The model shows that basin subsidence is significantly
affected by metamorphic densification. Compared to results obtained with
cruder density models, metamorphic densification accelerates subsidence
in the initial post-rifting stages as garnet becomes stable over an
increasing depth interval within the mantle, an effect that amplifies
the crust-mantle density contrast. For models with an extraordinarily
cold lithosphere, uplift is generated as a late stage of basin
evolution. In general, subsidence is not smooth but occurs instead in
small steps reflecting periods of accelerated/decelerated subsidence.
For typical crustal thicknesses, subsidence is controlled largely by
reactions in the mantle, and particularly those determining garnet
stability.
Create date
09/10/2012 19:50
Last modification date
20/08/2019 15:54
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