Reconstruction of the early Proterozoic stratigraphy of the Gawler Craton, South Australia

Parker, A. J.; Lemon, Nicholas M.

doi:10.1080/00167618208729206

Cited by 55 publications

(39 citation statements)

References 12 publications

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“…However, we believe a major feature such as a fracture or shear in the basement must occur here, providing a site for the conducting zone, which may well be caused by strongly saline water within the structure. It probably identifies the western limit of the intense Kimban deformations of the Hutchison Group sediments on eastern Eyre Peninsula (Parker & Lemon 1982) and could be analogous to the Torrens Hinge Zone. On this basis we would expect the conductivity anomaly to swing to the NW in parallel with the major structural trends in the region (see Fig.…”

Section: Discussionmentioning

confidence: 97%

Electrical conductivity anomalies and their relationship with the tectonics of South Australia

White

Polatayko

1985

Geophysical Journal International

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Summary. Geomagnetic variation studies have been conducted in the Gawler Craton and Adelaide Geosyncline of South Australia. The magnetometer stations extend from the coast up to the southern edge of the 1970 array of Gough, McElhinny & Lilley. The coast effect is the dominant feature of the data but use is made of the hypothetical event technique to identify two zones of telluric current concentration. Both of them appear to be associated with linear zones of enhanced electrical conductivity within the crust. The Southern Eyre Peninsula anomaly lies within the Gawler Craton and may identify a major fracture or shear in the upper crust. The conductivity anomaly within the Adelaide Geosyncline appears to be the continuation of the Flinders anomaly discovered by the 1970 array study. It correlates well with the arcuate fold pattern of the Southern Flinders Zone of the Geosyncline and with the local pattern of seismicity. In both anomalies the enhanced conductivity is probably caused by saline waters within fractured crustal rocks.

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Section: Discussionmentioning

confidence: 97%

Electrical conductivity anomalies and their relationship with the tectonics of South Australia

White

Polatayko

1985

Geophysical Journal International

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“…1). Palaeoproterozoic rocks in the northwestern Gawler Craton consist of upper amphibolite-to granulite-facies, felsic-mafic gneisses, and granites such as the 1585 Ma Hiltaba Suite (Parker & Lemon 1982;Rankin et al 1989;Daly et al 1998). The Musgrave Block consists of granulite-facies felsic gneisses, granites, felsic and mafic granulites, and voluminous mafic-ultramafic intrusive rocks (Major & Conor 1993;Glikson et al 1996;Young et al 1998).…”

Section: Source Characterizationmentioning

confidence: 96%

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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“…la). Unconformably overlying the Sleaford Complex is a Palaeoproterozoic sequence of clastic and chemical metasedimentary rocks, the Hutchison Group (Parker & Lemon 1982), which was multiply deformed, metamorphosed and intruded by granites during the Kimban Orogeny. Mortimer et al (1988a) constrained the three major deformational episodes of this orogeny to the period between 1843 ±2 and 1704 ± 14 Ma by dating of pre-Di and post-D 3 granites (see also Parker et al 1985 (3) Throughout the central Gawler Craton, widespread eruption of predominantly felsic volcanic rocks together with emplacement of granite occurred after the Kimban Orogeny.…”

Section: Introductionmentioning

confidence: 99%

A U‐Pb zircon study of the Mesoproterozoic Charleston Granite, Gawler Craton, South Australia

Creaser

Fanning

1993

Australian Journal of Earth Sciences

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Reconstruction of the early Proterozoic stratigraphy of the Gawler Craton, South Australia

Cited by 55 publications

References 12 publications

Electrical conductivity anomalies and their relationship with the tectonics of South Australia

Electrical conductivity anomalies and their relationship with the tectonics of South Australia

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

A U‐Pb zircon study of the Mesoproterozoic Charleston Granite, Gawler Craton, South Australia

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