Pressure–temperature–time constraints on gneiss dome formation in an intracontinental orogen

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.

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Pressure–temperature–time constraints on gneiss dome formation in an intracontinental orogen

Abstract: The Entia Gneiss Complex represents the mid-crustal core of the intracontinental Alice Springs Orogen. Located in the Harts Range, central Australia, it is characterized by the development of a domal structure including two sub-domes separated by a steeply dipping median high-strain zone.

Cited by 4 publications

References 104 publications

Hydration, melt production and rheological weakening within an intracontinental gneiss dome

Hydration, melt production and rheological weakening within an intracontinental gneiss dome

Early Paleozoic metamorphic P–T–t evolution of the northern Cathaysia Block (SE China): Implications for thermal history and geodynamic setting

From dome to duplex: Convergent gravitational collapse explains coeval intracratonic doming and nappe tectonics, central Australia

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