Tectonic Development of the Eastern Officer Basin, Central Australia

Hoskins, David; Lemon, Nicholas M.

doi:10.1071/eg995395

Cited by 16 publications

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“…Sedimentological and thermochronologic data suggest that the Petermann Orogen began around 570 Ma and continued until about 530 Ma (Maboko et al 1992;Walter & Gorter 1994;Hoskins & Lemon 1995;Walter et al 1995;Lindsay & Leven 1996;Camacho et al 1997). However, in the southern Amadeus Basin sequences older than 570 Ma thicken toward the orogen (Wells et al 1970;Hand & Sandiford 1999), suggesting that loading may have begun prior to 570 Ma, and that the orogeny may have lasted more than 40 Ma.…”

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Tectonic feedback, intraplate orogeny and the geochemical structure of the crust: a central Australian perspective

Sandiford

Hand

McLaren

2001

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The geological record of intraplate deformation in central Australia implies that past tectonic activity (basin formation, deformation and erosion) has modulated the response of the lithosphere during subsequent tectonic activity. In particular, there is a correspondence between the localization of deformation during intraplate orogeny and the presence of thick sedimentary successions in the preserved remnants of a formerly widespread intracratonic basin. This behaviour can be understood as a kind of 'tectonic feedback', effected by the longterm thermal and mechanical consequences of changes in the distribution of heat producing elements induced by earlier tectonism. From a geochemical point of view, one of the most dramatic effects of intraplate orogeny in central Australia has been the exposure, in the cores of the orogens, of deep crustal rocks largely depleted in the heat producing elements. The geochemical structuring of the crust associated with the erosion of the heat-producing upper crust resulted in long-term cooling of the deep crust and upper mantle with associated lithospheric strengthening. This is illustrated here by mapping the consequences of deformation and associated tectonic responses onto the h-q c plane, where h is the characteristic length-scale for heat production distribution, and q c is the total crustal heat production.

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Tectonic feedback, intraplate orogeny and the geochemical structure of the crust: a central Australian perspective

Sandiford

Hand

McLaren

2001

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“…Hoskins & Lemon 1995;Moussavi-Harami & Gravestock 1995). Each stage represents subsidence and accumulation of sediments during a major tectonic event.…”

Section: Geological Settingmentioning

confidence: 99%

“…The second model suggests that the Petermann Orogeny was a relatively short-lived event, spanning c. 580-540 Ma (e.g. Hoskins & Lemon 1995;Lindsay & Leven 1996;Camacho & McDougall 2000).…”

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“…Hoskins & Lemon 1995;Moussavi-Harami & Gravestock 1995). Geochemical and Nd isotope analyses of sedimentary rocks within the Officer Basin should determine the time at which the erosion of the Musgrave Block began to dominate the basin input, signifying initial unroofing of the Musgrave Block during the Petermann Orogeny.…”

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confidence: 99%

“…1, Walter et al 1995). The Centralian Superbasin was subsequently dissected into a southern fragment (Officer Basin), and a northern fragment (incorporating the Amadeus, Georgina and Ngalia Basins) during the Petermann Orogeny (Hoskins & Lemon 1995;Moussavi-Harami & Gravestock 1995;Walter et al 1995;Lindsay & Leven 1996). The exhumed Musgrave Block forms the northern margin of the Officer Basin.…”

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Nd isotopic and geochemical constraints on provenance of sedimentary rocks in the eastern Officer Basin, Australia: implications for the duration of the intracratonic Petermann Orogeny

Wade

Hand

Barovich

2005

JGS

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Sm-Nd isotopic and geochemical data from Neoproterozoic to Cambrian sedimentary rocks in the intracratonic eastern Officer Basin in central Australia highlight the evolving provenance roles of the basement complexes that underlie and bound the basin. Initial E Nd values of around À12 for the basal units indicate that both were largely derived from the late Archaean to Mesoproterozoic Gawler Craton, which bounds the basin to the south. At c. 720 Ma an influx of juvenile, glacially derived sediment indicates partial uplift of the Mesoproterozoic Musgrave Block along the basin's northern margin, in a regime interpreted to be broadly extensional. At around 600 Ma, synchronous with the development of a foreland architecture, there was a large influx of Musgrave Block-derived sediments. This is interpreted to mark the onset of the intracratonic Petermann Orogeny, which was a long-lived event or series of events, spanning more than 70 Ma. Subsequent to c. 600 Ma, the Nd isotopic composition of sequences within the Officer Basin indicates an increasing contribution from the Gawler Craton despite up to 45 km of denudation of part of the Musgrave Block. This suggests that the majority of sediment derived from the Petermann Orogen bypassed the eastern Officer Basin for much of the history of the Petermann Orogeny.

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Ni-Co enrichment and High-Tech metals geochemistry in the Wingellina Ni-Co oxide-type laterite deposit (Western Australia)

Putzolu

Boni

Mondillo

et al. 2019

Journal of Geochemical Exploration

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Tectonic Development of the Eastern Officer Basin, Central Australia

Cited by 16 publications

References 1 publication

Tectonic feedback, intraplate orogeny and the geochemical structure of the crust: a central Australian perspective

Tectonic feedback, intraplate orogeny and the geochemical structure of the crust: a central Australian perspective

Nd isotopic and geochemical constraints on provenance of sedimentary rocks in the eastern Officer Basin, Australia: implications for the duration of the intracratonic Petermann Orogeny

Ni-Co enrichment and High-Tech metals geochemistry in the Wingellina Ni-Co oxide-type laterite deposit (Western Australia)

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