From dome to duplex: Convergent gravitational collapse explains coeval intracratonic doming and nappe tectonics, central Australia
Résumé
In central Australia, an apparently coeval gneiss dome (Entia Dome) developed adjacent to a thrust belt (Arltunga Nappe Complex) within an intracratonic setting. Here we employ a combination of fieldwork, geochronology, and numerical modeling to investigate the structure and tectonic evolution of these features. We present a structural model linking an extensional domain comprising the Entia Dome, across a transitional zone containing the Bruna décollement zone and the Illogwa shear zone, into a contractional zone comprising thrusts and duplexes of the Arltunga Nappe Complex. Supported by numerical modeling, we propose a tectonic model in which the dome and nappe complex formed synchronously because of the convergent gravitational collapse of the 30−40-km-deep Paleozoic Harts Range rift.
Domaines
Tectonique
Fichier principal
Dome_to_Duplex_HAL.pdf (1.3 Mo)
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Supplementary Material.pdf (10.64 Mo)
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