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| Titel |
Three-dimensional approach to understanding the relationship between the Plio–Quaternary stress field and tectonic inversion in the Triassic Cuyo Basin, Argentina |
| VerfasserIn |
L. Giambiagi, S. Spagnotto, S. M. Moreiras, G. Gómez, E. Stahlschmidt, J. Mescua |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 2 ; Nr. 6, no. 2 (2015-06-19), S.747-763 |
| Datensatznummer |
250115463
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| Publikation (Nr.) |
 copernicus.org/se-6-747-2015.pdf |
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| Zusammenfassung |
| The Cacheuta sub-basin of the Triassic Cuyo Basin is an example of
rift basin inversion contemporaneous to the advance of the Andean
thrust front, during the Plio–Quaternary. This basin is one of the
most important sedimentary basins in a much larger Triassic
NNW-trending depositional system along the southwestern margin of the
Pangea supercontinent. The amount and structural style of inversion is
provided in this paper by a three-dimensional approach to the
relationship between inversion of rift-related structures and spatial
variations in late Cenozoic stress fields.
The Plio–Quaternary stress field exhibits important N–S variations in
the foreland area of the southern Central Andes, between 33 and
34° S, with a southward gradual change from pure
compression, with σ1 and σ2 being horizontal, to
a strike-slip type stress field, with σ2 being vertical.
We present a 3-D approach for studying the tectonic inversion of the
sub-basin master fault associated with strike-slip–reverse to
strike-slip faulting stress regimes. We suggest that the inversion of
Triassic extensional structures, striking NNW to WNW, occurred during
the Plio–Pleistocene in those areas with strike-slip–reverse to
strike-slip faulting stress regime, while in the reverse faulting
stress regime domain they remain fossilized. Our example demonstrates
the impact of the stress regime on the reactivation pattern along the
faults. |
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