Mineral Sands Occurrences in the Murray Basin, SoutheasternAustralia

Roy, Peter S.; Whitehouse, John L. R.; Cowell, Peter J.; Oakes, G.

doi:10.2113/gsecongeo.95.5.1107

Cited by 25 publications

(16 citation statements)

References 18 publications

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“…In the Murray Basin, the Loxton-Parilla Sands cover more than half the basin and consist of regressive shoreface, beach, dune and back-barrier-lagoonal sediments (Roy et al, 2000). The topographic expression of this unit is a series of crescent-shaped ridges which are interpreted to represent the position of successive shorelines (Brown and Stephenson, 1991).…”

Section: Plio-pleistocene Tectonicsmentioning

confidence: 99%

“…The unconformity between Miocene and Pliocene sediments in the SE Australian basins has often been interpreted as being due to a global regression in the late Miocene (e.g. Carter, 1978;Roy et al, 2000). The sea level curve of Haq et al (1988) shows a long period of relatively low sea levels in the late Miocene.…”

Section: Tectonics Versus Eustacymentioning

confidence: 99%

“…In the Latrobe Valley, thick sequences of brown coal have been made economic for power generation through the uplift and erosion of cover sequences in the Neogene. Furthermore, Roy et al (2000) suggested that Neogene growth faulting in the Murray Basin was an important factor in localising heavy mineral deposits within Pliocene barrier systems.…”

Section: Introductionmentioning

confidence: 99%

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Neogene Tectonics in Se Australia: Implications for Petroleum Systems

Dickinson¹,

Wallace²,

Holdgate³

et al. 2001

The APPEA Journal

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The influence of Neogene tectonics in the SE Australian basins has generally been underestimated in the petroleum exploration literature. However, onshore stratigraphic and offshore seismic data indicates that significant deformation and exhumation (up to one km or more) has occurred during the late Tertiary-Quaternary. This tectonism coincides with a change in the dynamics of the Australian plate, beginning at around 12 Ma, resulting in a WNW–ESE compressional regime which has continued to the present day.Significant late Miocene tectonism is indicated by a regional angular unconformity at around the Mio-Pliocene boundary in the onshore and nearshore successions of the SE Australian basins.Evidence of on going Pliocene- Quaternary tectonism is widespread in all of the SE Australian basins. Late Tertiary tectonism has produced structures in the offshore SE Australian basins which have been favourable targets for petroleum accumulation (e.g. Nerita structure, Torquay Sub-basin; Cormorant structure, Bass Basin). In the offshore Gippsland Basin, most of the oil- and gas-bearing structures have grown during Oligocene-Recent time. Some Gippsland Basin structures were largely produced prior to the mid- Miocene, while others have a younger structural history. In areas of intense late Tertiary exhumation and uplift (e.g. proximal to the Otway and Strzelecki Ranges), burial/maturation models of petroleum generation may be significantly affected by Neogene uplift.Many structures produced by late Miocene-Pliocene deformation are dry. These relatively young structures may post-date the major maturation episodes, with the post-structure history of the basins dominated by exhumation and cooling.

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Section: Plio-pleistocene Tectonicsmentioning

confidence: 99%

Section: Tectonics Versus Eustacymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Neogene Tectonics in Se Australia: Implications for Petroleum Systems

Dickinson¹,

Wallace²,

Holdgate³

et al. 2001

The APPEA Journal

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“…Heavy mineral sands, which provide titanium and other industrial minerals, are associated with strand lines of Pliocene beach deposits (Roy et al, 2000). Heavy mineral sands, which provide titanium and other industrial minerals, are associated with strand lines of Pliocene beach deposits (Roy et al, 2000).…”

Section: Murray Basin Australiamentioning

confidence: 99%

9. Magnetic Exploration Methods

Nabighian¹,

Grauch²,

Hansen³

et al. 2010

Geophysics Today

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The magnetic method, perhaps the oldest of geophysical exploration techniques, blossomed after the advent of airborne surveys in World War II. With improvements in instrumentation, navigation, and platform compensation, it is now possible to map the entire crustal section at a variety of scales, from strongly magnetic basement at regional scale to weakly magnetic sedimentary contacts at local scale. Methods of data filtering, display, and interpretation have also advanced, especially with the availability of low-cost, high-performance personal computers and color raster graphics. The magnetic method is the primary explo-ration tool in the search for minerals. In other arenas, the magnetic method has evolved from its sole use for mapping basement structure to include a wide range of new applications, such as locating intrasedimentary faults, defining subtle lithologic contacts, mapping salt domes in weakly magnetic sediments, and better defining targets through 3D inversion. These new applications have increased the method's utility in all realms of exploration -in the search for minerals, oil and gas, geothermal resources, and groundwater, and for a variety of other purposes such as natural hazards assessment, mapping impact structures, and engineering and environmental studies.

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“…13,14 More recently, numerous, relatively coarse grained deposits (90-300 mm) have been discovered in the beach surf zone facies of prograded barriers. 15 These deposits, located mainly in the western, northern and central parts of the basin, provide the current development impetus in the Murray Basin (Fig. 1a).…”

Section: Sample Descriptions Murray Basinmentioning

confidence: 99%

Chemical variability in chrome spinel grains from magnetically fractionated ilmenite concentrates: implications for processing

Pownceby¹,

Fisher-White²

2006

Mineral Processing and Extractive Metallurgy

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Detrital chrome spinels are contaminant grains within ilmenite rich heavy mineral concentrates found along the southeast coastline of Africa and in the Murray Basin region of southeastern Australia. Separation is often difficult because of overlaps of physical properties between the chrome spinels and ilmenite. The presence of even minor levels of chromia in the concentrates will downgrade their market value as potential feedstocks for the production of titania pigment. In the present paper, the chemistry and distribution of chrome spinels in magnetically fractionated ilmenite concentrates from both regions are characterised using electron microprobe imaging and analysis techniques to establish the chemical and mineralogical factors that impact on their separation behaviour. Results show that the South African sample contains two chemically and magnetically distinct chrome spinel groups. The first group is dominated by a strong trend that reflects the mutual substitution between Al 3z and Cr 3z while the second group is characterised by compositions containing abundant Fe 3 O 4 magnetite component. The presence of these two spinel groups means that physical separation from the ilmenite is relatively straightforward using simple roasting and magnetic separation procedures. In comparison, the Murray Basin chrome spinels exhibit broad chemical variation that results in no clear separation based on magnetic response. The broad spread in composition and magnetic susceptibility of the chrome spinels is responsible for the previously observed difficulties in developing successful separation methods.

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Mineral Sands Occurrences in the Murray Basin, SoutheasternAustralia

Cited by 25 publications

References 18 publications

Neogene Tectonics in Se Australia: Implications for Petroleum Systems

Neogene Tectonics in Se Australia: Implications for Petroleum Systems

9. Magnetic Exploration Methods

Chemical variability in chrome spinel grains from magnetically fractionated ilmenite concentrates: implications for processing

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