Selective inversion of rift basins in lithospheric-scale analogue experiments
<p>Basin inversion is commonly attributed to the reverse reactivation of basin-bounding normal faults. This association implies that basin uplift and inversion-related structures are mainly controlled by the frictional behaviour of pre-existing faults and associated damage zones. In this study...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-08-01
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| Series: | Solid Earth |
| Online Access: | https://se.copernicus.org/articles/14/909/2023/se-14-909-2023.pdf |
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| author | A. Samsu A. Samsu W. Gorczyk T. C. Schmid P. G. Betts A. R. Cruden E. Morton F. Amirpoorsaeed |
| author_facet | A. Samsu A. Samsu W. Gorczyk T. C. Schmid P. G. Betts A. R. Cruden E. Morton F. Amirpoorsaeed |
| author_sort | A. Samsu |
| collection | DOAJ |
| description | <p>Basin inversion is commonly attributed to the reverse
reactivation of basin-bounding normal faults. This association implies that
basin uplift and inversion-related structures are mainly controlled by the
frictional behaviour of pre-existing faults and associated damage zones. In
this study, we use lithospheric-scale analogue experiments of orthogonal
extension followed by shortening to explore how the flow behaviour of
ductile layers underneath rift basins promote or suppress basin inversion.
Our experiments show that the rheology of the ductile lower crust and
lithospheric mantle, modulated by the imposed bulk strain rate, determine
(1) basin distribution in a wide rift setting and (2) strain accommodation
by fault reactivation and basin uplift during subsequent shortening. When
the ductile layers deform uniformly during extension (i.e. stretching) and
shortening (i.e. thickening), all of the basins are inverted. When
deformation in the ductile layers is localised during extension (i.e.
necking) and shortening (i.e. folding), only some basins – which are
evenly spaced apart – are inverted. We interpret the latter as selective
basin inversion, which may be related to the superposition of crustal-scale
and lithospheric-scale boudinage during the previous basin-forming
extensional phase and/or folding of the ductile layers during shortening.</p> |
| first_indexed | 2024-03-12T12:32:22Z |
| format | Article |
| id | doaj.art-ef5c46ca3ab9450b988e8603f42f6715 |
| institution | Directory Open Access Journal |
| issn | 1869-9510 1869-9529 |
| language | English |
| last_indexed | 2024-03-12T12:32:22Z |
| publishDate | 2023-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Solid Earth |
| spelling | doaj.art-ef5c46ca3ab9450b988e8603f42f67152023-08-29T09:02:49ZengCopernicus PublicationsSolid Earth1869-95101869-95292023-08-011490993610.5194/se-14-909-2023Selective inversion of rift basins in lithospheric-scale analogue experimentsA. Samsu0A. Samsu1W. Gorczyk2T. C. Schmid3P. G. Betts4A. R. Cruden5E. Morton6F. Amirpoorsaeed7Institute of Earth Sciences, University of Lausanne, Lausanne, 1015, SwitzerlandSchool of Earth, Atmosphere and Environment, Monash University, Melbourne, 3800, AustraliaCentre for Exploration Targeting, School of Earth Sciences, University of Western Australia, Perth, 6009, AustraliaInstitute of Geological Sciences, University of Bern, Bern, 3012, SwitzerlandSchool of Earth, Atmosphere and Environment, Monash University, Melbourne, 3800, AustraliaSchool of Earth, Atmosphere and Environment, Monash University, Melbourne, 3800, AustraliaSchool of Earth, Atmosphere and Environment, Monash University, Melbourne, 3800, AustraliaSchool of Earth, Atmosphere and Environment, Monash University, Melbourne, 3800, Australia<p>Basin inversion is commonly attributed to the reverse reactivation of basin-bounding normal faults. This association implies that basin uplift and inversion-related structures are mainly controlled by the frictional behaviour of pre-existing faults and associated damage zones. In this study, we use lithospheric-scale analogue experiments of orthogonal extension followed by shortening to explore how the flow behaviour of ductile layers underneath rift basins promote or suppress basin inversion. Our experiments show that the rheology of the ductile lower crust and lithospheric mantle, modulated by the imposed bulk strain rate, determine (1) basin distribution in a wide rift setting and (2) strain accommodation by fault reactivation and basin uplift during subsequent shortening. When the ductile layers deform uniformly during extension (i.e. stretching) and shortening (i.e. thickening), all of the basins are inverted. When deformation in the ductile layers is localised during extension (i.e. necking) and shortening (i.e. folding), only some basins – which are evenly spaced apart – are inverted. We interpret the latter as selective basin inversion, which may be related to the superposition of crustal-scale and lithospheric-scale boudinage during the previous basin-forming extensional phase and/or folding of the ductile layers during shortening.</p>https://se.copernicus.org/articles/14/909/2023/se-14-909-2023.pdf |
| spellingShingle | A. Samsu A. Samsu W. Gorczyk T. C. Schmid P. G. Betts A. R. Cruden E. Morton F. Amirpoorsaeed Selective inversion of rift basins in lithospheric-scale analogue experiments Solid Earth |
| title | Selective inversion of rift basins in lithospheric-scale analogue experiments |
| title_full | Selective inversion of rift basins in lithospheric-scale analogue experiments |
| title_fullStr | Selective inversion of rift basins in lithospheric-scale analogue experiments |
| title_full_unstemmed | Selective inversion of rift basins in lithospheric-scale analogue experiments |
| title_short | Selective inversion of rift basins in lithospheric-scale analogue experiments |
| title_sort | selective inversion of rift basins in lithospheric scale analogue experiments |
| url | https://se.copernicus.org/articles/14/909/2023/se-14-909-2023.pdf |
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