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Journal articles on the topic 'Structural South Australia Gawler Ranges'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Campbell, E. M., and C. R. Twidale. "The gawler ranges, South Australia: an unusual volcanic massif." Australian Geographer 22, no. 1 (May 1991): 24–33. http://dx.doi.org/10.1080/00049189108703018.

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TIMMS, BRIAN V., and PETER HUDSON. "The brine shrimps (Artemia and Parartemia) of South Australia, including descriptions of four new species of Parartemia (Crustacea: Anostraca: Artemiina)." Zootaxa 2248, no. 1 (October 6, 2009): 47–68. http://dx.doi.org/10.11646/zootaxa.2248.1.2.

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The Australian endemic brine shrimp Parartemia is more speciose than the literature suggests, with eight described species, four new ones added here from South Australia and many undescribed species elsewhere in Australia. P. acidiphila n. sp. occurs in acidic salinas on Eyre Peninsula, in the Gawler Ranges in South Australia and also in the Esperance hinterland, Western Australia, while P. auriciforma n. sp., P. triquetra n. sp. and P. yarleensis n. sp. occur in remote episodic salinas in western South Australia. Introduced Artemia franciscana and A. parthenogenetica are limited to present and defunct salt works; reports of Artemia beyond salt works in South Australia are enigmatic.

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Greenslade, PJM. "Environment and Competition as Determinants of Local Geographical-Distribution of 5 Meat Ants, Iridomyrmex-Purpureus and Allied Species (Hymenoptera, Formicidae)." Australian Journal of Zoology 35, no. 3 (1987): 259. http://dx.doi.org/10.1071/zo9870259.

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The distributions of five species of meat ants [Iridomyrmex purpureus S.S. (P), 'yellow species' (Y), viridiaeneus (V), 'small purple species' (SP), 'blue species' (B)] were investigated in the Gawler Ranges and Eyre Peninsula of South Australia, in relation to climate, soils and vegetation. P occurred mainly in two areas of relatively high total and/or summer rainfall that were predicted a priori, and Y was limited to sandy alkaline yellow duplex soils. V, SP and B are all found in the arid Gawler Ranges and, in this order, form a sequence of increasing penetration into areas of higher rainfall on Eyre Peninsula. It is proposed that a north-to-south gradient of increasing rainfall is accompanied by a gradient of increasing diversity (species richness) of local ant faunas. By analogy with the distribution of meat ant species across habitats differing in the diversity of their ant faunas in the Gawler Ranges, it is suggested that southern limits to the ranges of V and SP are determined by intensification of diffuse competition from increasingly diverse ant communities. Within their ranges, however, the relative frequencies of SP and B depend on simple asymmetrical competition between meat ant species. Diffuse competition at the periphery of a species' range is discussed briefly as selective pressure towards evolutionary change or stasis.

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Twidale, Charles Rowland. "Evolution of an ancient cratonic upland, the Gawler Ranges of inland South Australia." Géomorphologie : relief, processus, environnement 26, no. 1 (May 1, 2020): 35–54. http://dx.doi.org/10.4000/geomorphologie.14036.

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Swinbourne, Michael, David Taggart, Alyce Swinbourne, and Bertram Ostendorf. "Southern hairy-nosed wombats (Lasiorhinus latifrons) in the Gawler Ranges region of South Australia: population growth from 1988 to 2016." Australian Mammalogy 41, no. 1 (2019): 112. http://dx.doi.org/10.1071/am17051.

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The southern hairy-nosed wombat (Lasiorhinus latifrons) is the faunal emblem of South Australia. It is also considered to be an agricultural pest, as its burrowing activities can cause significant damage to agricultural land and infrastructure. Unfortunately, much of our knowledge of this species’ population dynamics is limited and/or out of date. The aim of this study was to estimate the distribution and abundance of southern hairy-nosed wombats in the Gawler Ranges region of South Australia, and to identify any changes since the last survey in 1988. Using a combination of satellite imagery and a ground survey conducted in May 2016, we mapped the distribution of wombat warrens in the region and counted and measured all warrens within 1000 randomly selected 1-km2 cells. We estimate the current wombat population in the Gawler Ranges to be 240095 (149051–311595), an increase from 14373 in 1988. This population growth is most likely linked to a long-term decline in the European rabbit population following the release of RHVD in the 1990s. In 2016 the IUCN upgraded the conservation status of southern hairy-nosed wombats from ‘Least Concern’ to ‘Near Threatened’. Our findings suggest that this may not have been warranted.

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Baldwin, S. L., I. McDougall, and G. E. Williams. "K/Ar and40Ar/39Ar analyses of meltrock from the Acraman impact structure, Gawler Ranges, South Australia." Australian Journal of Earth Sciences 38, no. 3 (July 1991): 291–98. http://dx.doi.org/10.1080/08120099108727973.

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Pankhurst, M. J., B. F. Schaefer, P. G. Betts, N. Phillips, and M. Hand. "A mesoproterozoic continental flood rhyolite province, the Gawler Ranges, Australia: the end member example of the Large Igneous Province clan." Solid Earth Discussions 2, no. 2 (September 9, 2010): 251–74. http://dx.doi.org/10.5194/sed-2-251-2010.

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Abstract. Rhyolite and dacite lavas of the Mesoproterozoic upper Gawler Range Volcanics (GRV) (>30 000 km3 preserved), South Australia, represent the remnants of one of the most voluminous felsic magmatic events preserved on Earth. Geophysical interpretation suggests eruption from a central cluster of feeder vents which supplied large-scale lobate flows >100 km in length. Pigeonite inversion thermometers indicate eruption temperatures of 950–1100 °C. The lavas are A-type in composition (e.g. high Ga/Al ratios) and characterised by elevated primary halogen concentrations (~1600 ppm Fluorine, ~400 ppm Chlorine). These depolymerised the magma such that temperature-composition-volatile non-Arrhenian melt viscosity modelling suggests they had viscosities of <3.5 log η (Pa s). These physicochemical properties have led to the emplacement of a Large Rhyolite Province, which has affinities in emplacement style to Large Basaltic Provinces. The low viscosity of these felsic magmas has produced a unique igneous system on a scale which is either not present or poorly preserved elsewhere on the planet. The Gawler Range Volcanic Province represents the erupted portion of the felsic end member of the family of voluminous, rapidly emplaced terrestrial magmatic provinces.

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Pankhurst, M. J., B. F. Schaefer, P. G. Betts, N. Phillips, and M. Hand. "A Mesoproterozoic continental flood rhyolite province, the Gawler Ranges, Australia: the end member example of the Large Igneous Province clan." Solid Earth 2, no. 1 (March 31, 2011): 25–33. http://dx.doi.org/10.5194/se-2-25-2011.

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Abstract. Rhyolite and dacite lavas of the Mesoproterozoic upper Gawler Range Volcanics (GRV) (>30 000 km3 preserved), South Australia, represent the remnants of one of the most voluminous felsic magmatic events preserved on Earth. Geophysical interpretation suggests eruption from a central cluster of feeder vents which supplied large-scale lobate flows >100 km in length. Pigeonite inversion thermometers indicate eruption temperatures of 950–1100 °C. The lavas are A-type in composition (e.g. high Ga/Al ratios) and characterised by elevated primary halogen concentrations (~1600 ppm fluorine, ~400 ppm chlorine). These depolymerised the magma such that temperature-composition-volatile non-Arrhenian melt viscosity modelling suggests they had viscosities of <3.5 log η (Pa s). These physicochemical properties have led to the emplacement of a Large Rhyolite Province, which has affinities in emplacement style to Large Basaltic Provinces. The low viscosity of these felsic magmas has produced a unique igneous system on a scale which is either not present or poorly preserved elsewhere on the planet. The Gawler Range Volcanic Province represents the erupted portion of the felsic end member of the family of voluminous, rapidly emplaced terrestrial magmatic provinces.

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Williams, Nicholas J., Mark P. Fischer, and David P. Canova. "Structural evolution and deformation near a tertiary salt weld, Willouran Ranges, south Australia." Marine and Petroleum Geology 102 (April 2019): 305–20. http://dx.doi.org/10.1016/j.marpetgeo.2018.12.035.

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Lubiniecki, D. C., R. C. King, S. P. Holford, M. A. Bunch, S. B. Hore, and S. M. Hill. "Cenozoic structural evolution of the Mount Lofty Ranges and Flinders Ranges, South Australia, constrained by analysis of deformation bands." Australian Journal of Earth Sciences 67, no. 8 (February 9, 2020): 1097–115. http://dx.doi.org/10.1080/08120099.2019.1695227.

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Gloyn-Jones, Jonathan Nicholas, Ian James Basson, Ben Stoch, Corné Koegelenberg, and Michael-John McCall. "Integration of Stress–Strain Maps in Mineral Systems Targeting for IOCG Mineralisation within the Mt. Woods Inlier, Gawler Craton, South Australia." Minerals 12, no. 6 (May 31, 2022): 699. http://dx.doi.org/10.3390/min12060699.

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The application of finite element analysis is used to simulate the relative distribution and magnitude of stress–strain conditions during a geologically brief, NNW-SSE-oriented, extensional event (1595 Ma to 1590 Ma), co-incident with IOCG-hydrothermal fluid flow and mineralisation across the Mt Woods Inlier, Gawler Craton, South Australia. Differential stress and shear strain maps across the modelled terrane highlight regions that were predisposed to strain localization, extensional failure and fluid throughput during the simulated mineralisation event. These maps are integrated with other datasets and interpretation layers, one of which is a proposed structural–geometrical relationship apparent in many world-class IOCG deposits, including Prominent Hill, Olympic Dam, Sossego, Salobo, Cristalino and Candelaria. These deposits occur at steeply plunging, pipe-like intersections of conjugate extensional systems of faults, shears and/or contacts, wherein the obtuse angle may have been bisected by the maximum principal extensional axis (viz., σ3) during mineralisation. Several other layers are also used for the generation of targets, such as distance from major shear zones, favourable host lithologies, and proximity to tectonostratigraphic contacts of markedly contrasting competency. The result is an integrated target index or heat map for IOCG prospectively across the Mt. Woods Inlier.

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Paul, E., T. Flöttmann, and M. Sandiford. "Structural geometry and controls on basement‐involved deformation in the northern Flinders Ranges, Adelaide Fold Belt, South Australia." Australian Journal of Earth Sciences 46, no. 3 (June 1999): 343–54. http://dx.doi.org/10.1046/j.1440-0952.1999.00711.x.

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Laflamme, Marc, James G. Gehling, and Mary L. Droser. "Deconstructing an Ediacaran frond: three-dimensional preservation of Arborea from Ediacara, South Australia." Journal of Paleontology 92, no. 3 (March 14, 2018): 323–35. http://dx.doi.org/10.1017/jpa.2017.128.

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AbstractExquisitely preserved three-dimensional examples of the classic Ediacaran (late Neoproterozoic; 570–541 Ma) frond Charniodiscus arboreus Jenkins and Gehling, 1978 (herein referred to as Arborea arborea Glaessner in Glaessner and Daily, 1959) are reported from the Ediacara Member, Rawnsley Quartzite of South Australia, and allow for a detailed reinterpretation of its functional morphology and taxonomy. New specimens cast in three dimensions within sandy event beds showcase detailed branching morphology that highlights possible internal features that are strikingly different from rangeomorph and erniettomorph fronds. Combined with dozens of well-preserved two-dimensional impressions from the Flinders Ranges of South Australia, morphological variations within the traditional Arborea morphotype are interpreted as representing various stages of external molding. In rare cases, taphomorphs (morphological variants attributable to preservation) represent composite molding of internal features consisting of structural supports or anchoring sites for branching structures. Each primary branch consists of a central primary branching stalk from which emerge several oval secondary branches, which likely correspond to similar structures found in rare two-dimensional specimens. Considering this new evidence, previous synonymies within the Arboreomorpha are no longer justified, and we suggest that the taxonomy of the group be revised.

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Gannaway Dalton, C. Evelyn, Katherine A. Giles, Mark G. Rowan, Richard P. Langford, Thomas E. Hearon, and J. Carl Fiduk. "Sedimentologic, stratigraphic, and structural evolution of minibasins and a megaflap formed during passive salt diapirism: The Neoproterozoic Witchelina diapir, Willouran Ranges, South Australia." Journal of Sedimentary Research 90, no. 2 (February 20, 2020): 165–99. http://dx.doi.org/10.2110/jsr.2020.9.

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ABSTRACT This study documents the growth of a megaflap along the flank of a passive salt diapir as a result of the long-lived interaction between sedimentation and halokinetic deformation. Megaflaps are nearly vertical to overturned, deep minibasin stratal panels that extend multiple kilometers up steep flanks of salt diapirs or equivalent welds. Recent interest has been sparked by well penetrations of unidentified megaflaps that typically result in economic failure, but their formation is also fundamental to understanding the early history of salt basins. This study represents one of the first systematic characterizations of an exposed megaflap with regards to sub-seismic sedimentologic, stratigraphic, and structural details. The Witchelina diapir is an exposed Neoproterozoic primary passive salt diapir in the eastern Willouran Ranges of South Australia. Flanking minibasin strata of the Top Mount Sandstone, Willawalpa Formation, and Witchelina Quartzite, exposed as an oblique cross section, record the early history of passive diapirism in the Willouran Trough, including a halokinetically drape-folded megaflap. Witchelina diapir offers a unique opportunity to investigate sedimentologic responses to the initiation and evolution of passive salt movement. Using field mapping, stratigraphic sections, petrographic analyses, correlation diagrams, and a quantitative restoration, we document depositional facies, thickness trends, and stratal geometries to interpret depositional environments, sequence stratigraphy, and halokinetic evolution of the Witchelina diapir and flanking minibasins. Top Mount, Willawalpa, and Witchelina strata were deposited in barrier-bar-complex to tidal-flat environments, but temporal and spatial variations in sedimentation and stratigraphic patterns were strongly influenced from the earliest stages by the passively rising Witchelina diapir on both regional (basinwide) and local minibasin scales. The salt-margin geometry was depositionally modified by an early erosional sequence boundary that exposed the Witchelina diapir and formed a salt shoulder, above which strata that eventually became the megaflap were subsequently deposited. This shift in the diapir margin and progressive migration of the depocenter began halokinetic rotation of flanking minibasin strata into a megaflap geometry, documenting a new concept in the understanding of deposition and deformation during passive diapirism in salt basins.

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Caruso, A. S., K. D. Clarke, C. J. Tiddy, and M. M. Lewis. "Airborne hyperspectral characterisation of hydrothermal alteration in a regolith-dominated terrain, southern Gawler Ranges, South Australia." Australian Journal of Earth Sciences, October 18, 2020, 1–19. http://dx.doi.org/10.1080/08120099.2020.1826122.

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Smith, Deane A., Mark R. Lethbridge, Benjamin L. Allen, and Rose L. Andrew. "Inferring inter-colony movement within metapopulations of yellow-footed rock-wallabies using estimates of kinship." Conservation Genetics, January 27, 2023. http://dx.doi.org/10.1007/s10592-022-01498-8.

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AbstractUnderstanding the exchange of individuals between wildlife populations, particularly those with naturally fragmented habitats, is important for the effective management of these species. This is of particular consequence when the species is of conservation concern, and isolated populations may be lost due to pressures from predation or competition, or catastrophic events such as wildfire. Here we demonstrate the use kinship and population structure analysis to show potential recent movement between colonies in metapopulations of yellow-footed rock-wallaby (Petrogale xanthopus Gray 1854) at two sites in the Grey Range of Queensland, and at four sites in the Gawler Ranges of South Australia. These colonies are also compared to a single colony from the Flinders Ranges, a connected landscape of rock-wallaby habitat. Using reduced representation next-generation sequencing, we acquired and filtered a set of ~ 17,000 single-nucleotide polymorphisms to examine population genetic variation, structure and relationships within populations, and also identify putative migrants. Initial STRUCTURE analysis re-confirmed each population should be considered separately. Tests of population genetic variation identify several colonies appearing to be experiencing genetic erosion, also with low calculated effective population sizes (Ne = 4.5–36.6). Pairwise comparisons of individual relatedness (relatedness coeffiecients; r) implied several contemporary movement events between colonies within both the Gawler and Grey Ranges (r > 0.125), which was then affirmed with tests for putative first generation migrants. These results are of particular note in South Australia, where threat abatement (management of key predators and competitors) may facilitate dispersion. Additionally, in Queensland, colonies are separated by anthropogenic barriers: predator exclusion fencing designed to exclude dingoes (Canis familiaris) from grazing land, which may hinder dispersal. This work highlights the usefulness of population genetics to inform management outcomes in wildlife, in this case, highlighting the need for threatened species management at the landscape level.

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Hill, E. J., A. Fabris, Y. Uvarova, and C. Tiddy. "Improving geological logging of drill holes using geochemical data and data analytics for mineral exploration in the Gawler Ranges, South Australia." Australian Journal of Earth Sciences, September 27, 2021, 1–27. http://dx.doi.org/10.1080/08120099.2021.1971763.

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