Дисертації з теми "Curnamona Province"
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1
Ellershaw, Angus. "Fluid inclusion, petrographic and sulphur isotope investigations into Luxemburg mineral deposits, Curnamona Province, South Australia /." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09SB/09sbe457.pdf.
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Heimann, Ríos Adriana. "Geochemical keys for the genesis of Proterozoic garnet-rich rocks and minor metasediment-hosted Pb-Zn-Ag mineralization, southern Curnamona Province, Australia." [Ames, Iowa : Iowa State University], 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3244372.
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Kay, B. V. "Testing the uncover paradigm: crustal fluid pathways in the Curnamona Province." Thesis, 2017. http://hdl.handle.net/2440/128253.
Повний текст джерелаАнотація:
This item is only available electronically.In July 2017, scale-reduction was undertaken to improve the bandwidth and resolution of the AusLAMP defined Curnamona Conductor (Robertson et al., 2016) by way of a broadband magnetotelluric profile with site spacing of 2 km, extending from the Erudina Domain across the Mudguard and Quinyambie Domains in the Curnamona Province. A fossil fluid pathway has been identified from the lower mid crustal conductor to the near surface situated near a topographic basement high. The upper crustal conductor has been further delineated beneath the Quinyambie Domain to within 5 km of the surface situated alongside a major crustal feature.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2017
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Clark, Christopher F. P. "Fluid-rock systems in the Southern Curnamona Province Australia/ Christopher F.P. Clark." 2005. http://hdl.handle.net/2440/22329.
Повний текст джерелаАнотація:
"September 2005"Bibliography: pages 109-121.
xii, 121 pages : ill., maps (1 col.), plates, photographs (some col.) ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Thesis (Ph.D.)--University of Adelaide, School of Earth and Environmental Sciences, Discipline of Geology and Geophysics, 2006
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Clark, Christopher Francis Paul. "Fluid-rock systems in the Southern Curnamona Province Australia/ Christopher F.P. Clark." Thesis, 2005. http://hdl.handle.net/2440/22329.
Повний текст джерелаАнотація:
"September 2005"Bibliography: pages 109-121.
xii, 121 pages : ill., maps (1 col.), plates, photographs (some col.) ; 30 cm.
Thesis (Ph.D.)--University of Adelaide, School of Earth and Environmental Sciences, Discipline of Geology and Geophysics, 2006
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Rutherford, Lachlan Stuart. "Developing a tectonic framework for the Southern Curnamona Cu - Au Province : geochemical and radiogenic isotope applications." 2006. http://hdl.handle.net/2440/37818.
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"Two independent geochronological techniques specifically targeting post-kinematic or late-stage growth of kyanite, staurolite and late-stage garnet in the southern Curnamona Province has found that these minerals grew during the Delamerian Orogeny (~530-500 Ma). Prograde metamorphism during the Delamerian Orogeny attained kyanite-staurolite-garnet grade (amphibolite-facies). Previous interpretations of an anticlockwise P-T path for the Olarian Orogeny need revising, as these interpretations have been shown in this study to be based on textural relationships spanning ~1100 million years. This highlights the importance of in situ geochronological techniques in defining robust P-T-t paths for a region." --p. 121 of source document.Thesis (Ph.D.)--School of Earth and Environmental Sciences, 2006.
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Wittwer, P. D. "Geology and geochemistry of regolith carbonate accumulations of the southwestern Curnamona Province, SA: Implications for mineral exploration." Thesis, 2004. http://hdl.handle.net/2440/123526.
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This item is only available electronically.Although regolith carbonate accumulations (RCAs) have been extensively used in mineral exploration programs in the regolith-dominated terrains of the Yilgarn and Gawler Cratons, their use has so far been limited within the Curnamona Province, SA. This study shows how the detailed characterisation of RCAs in the southwestern Curnamona Province enhances their use in mineral exploration programs at the regional to prospect scales. A regional RCA distribution map for the study area shows that RCAs are generally widespread, although certain RCA morphological facies are dominant in different parts of the landscape, and in some areas RCAs are absent or at best a very minor component of the regolith. A dataset of whole rock geochemical assays of RCAs provides the basis of graphical presentations and geochemical maps that highlight the chemical characteristics of RCAs proximal to areas of known Au mineralisation in contrast to more distal samples. Several Au pathfinder elements in RCA assays were found to include As, W, Bi, and Mo, and greatly assist in further anomaly definition when used in conjunction with Au assays. Major element composition (e.g. Ca, Mg, Fe) showed little relationship to local landform setting, however, landscape setting appears to be a more important control on Au assay results both at the regional and prospect scales. Gold distribution in the area was independent of the presence of major elements such as calcium and magnesium. Microprobe analysis showed that Au was rare and invisible at the resolution of the analysis and existed in the calcium carbonate matrix as well as in detrital material. The composition of the underlying rock lithologies was also compared to the whole rock chemistry of the RCAs and showed the possibilities of this technique to aid geological mapping in regolith-dominated terrains and to assist in locating mineralised systems.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2004
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Shearer, A. "The application of ground based and airborne radiometric methods to aid geological mapping in the Olary Province, South Australia." Thesis, 1999. http://hdl.handle.net/2440/112811.
Повний текст джерелаАнотація:
This item is only available electronically.The Late Palaeoproterozoic Olary Domain, in the east of South Australia, has been extensively surveyed using airborne geophysical methods, including 256 channel radiometries. This detailed data set over outcropping areas is potentially a valuable aid to geological mapping. Ground-based radiometric data was obtained along profiles through the eastern Weekeroo Inlier and Ninnerie Hill areas in order to relate radioelement concentrations to lithological units. The Weekeroo Inlier traverse sampled all stratigraphic units present in the Olary Domain. The Ninnerie Hill traverse sampled Early Mesoproterozoic granitoids, migmatites and host metasediments. Two acquisition styles were attempted when collecting the ground-based data, with continuous recording to provide results that better replicate the airborne data than discrete sampling. The discrete sampling method was found to be heavily influenced by single point anomalies and not representative of the lithological average. Relative peaks and troughs on all three channels and total count data correspond well between the ground and airborne data. Correlation between the airborne data and the ground-based data was best for the K channel. For the Th channel the ground-based data was similar to the airborne data in wavelength and amplitude but was bulk shifted below the airborne data. The U channel data from the ground-based data detected the same anomalies as the airborne data but was an order of magnitude higher. The differences between the airborne and ground-based data could be due to errors in the calibration process that was performed for part of this project or due to the time difference in acquisition of the ground based and airborne data. Comparison of ground-based data with the geology of the survey areas revealed that radiometric data can provide useful lithological discrimination. Within the survey area some differences between metasediments, intrusive lithologies, and alteration types are determinable. The radiometric data can successfully differentiate between potasic and sodic granites. The low levels in all three measured radioelement channels can reflect occurrences of amphibolites. The data discriminates between pelites and psammites in that the pelites contain significantly higher levels of K, the difference between levels of Th and U are less extreme but are still discernable. As well as providing a mapping tool on the lithology scale, the interpretation of radiometric data can resolve sub-lithology scale variations.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1999
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Conway, D. J. "A numerical study on the distortion of magnetotelluric data from topography, near-surface conductors and basins." Thesis, 2013. http://hdl.handle.net/2440/100070.
Повний текст джерелаАнотація:
This item is only available electronically.Magnetotelluric (MT) data may be distorted by a variety of structures, including near-surface inhomogeneities, topographic gradients and large conductive bodies. A synthetic study is undertaken to analyse these three factors in the Curnamona Province, South Australia. Firstly, the effect of topography in the northern Flinders Ranges is investigated by the use of forward models. The results show both a galvanic and an inductive distortion concentrated at high topographic gradients. The effect of near-surface conductors is also investigated with forward models, using data from Lake Frome as input. The models show a small area of galvanic distortion around the circumference of the lake, but no regional effect. These results are compared with distortion analyses of real data. Finally, thin-sheet modelling is used to determine the effect of a synthetically calculated conductance using data from the eastern Arrowie Basin. Results from the thin-sheet model show that the Arrowie Basin has the potential to inductively distort MT data on a regional scale. Using this result as motivation, two three-dimensional (3-D) inversions are undertaken on the Geoscience Australia "08GA-C1 MT" line; one incorporating the Arrowie Basin as a prior model and the other starting from a homogeneous half-space. The results of these inversions are overlain with interpretations from seismic data collected along the same line. The best agreement between the seismic and MT data is achieved with the prior-model inversion, supporting the hypothesis that basin scale conductivity structures distorts MT data and showing that this effect is alleviated by incorporating basin structure as a prior model during inversion.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2013
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Payne, J. L. "The Poodla Granite in the Olary Domain, South Australia: Intrusive relationships, alteration and implications for Cu-Au mineralisation." Thesis, 2003. http://hdl.handle.net/2440/112941.
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This item is only available electronically.The Palaeoproterozoic Poodla Granite within the Olary Domain, Curnamona Province, South Australia, has been suggested as a direct contributor to Cu-Au mineralisation within the region on the basis of age correlations. Alteration present within the Poodla Granite consists of four styles that have been interpreted as two events. The first event includes pervasive potassic alteration followed by pervasive Na-Ca alteration. Sm/Nd isotope analysis indicates fluids for this event were sourced from the Willyama Supergroup sediments. The second event consists of fracture-controlled sodic and Ca-Na-Si alteration with associated actinolite/clinopyroxene brecciation. Utilisation of magmatic major element trends obtained from a natural analogue (Mt Angelay Complex, Cloncurry District) has allowed greater accuracy in chemical characterisation of alteration. Fluid inclusion analysis has identified two distinct fluids involved in the later fracture-controlled sodic and Ca-Na-Si alteration event. Namely, a low salinity (18-26wt% NaCl equivalent) and a high salinity (35-45wt% NaCl equivalent) fluid. A later fluid mobilisation event related to the Palaeozoic Delamerian Orogeny is indicated by re-equilibration of the Rb/Sr isotopic system. New age constraints from other granites in the I-type suite, to which Poodla Granite belongs, suggest the Poodla Granite did not have direct hydrothermal input into regional Cu-Au mineralisation. Analysis of alteration chemistry suggests that Cu and Au mobilisation occurred during the first alteration event. These results offer evidence for previously untested Cu-Au mineralising models within the region and may encourage exploration for Cu-Au resources.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2003
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Benton, R. Y. "A petrological, geochemical and isotopic investigation of granitoids from the Olary Province of South Australia – implications for Proterozoic crustal growth." Thesis, 1994. http://hdl.handle.net/2440/120547.
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This item is only available electronically.Analysis of granitoids from the Olary Block of South Australia, gave rise to the identification of three genetically different granitoids. The Bimbowrie Granite, characterised by high Al203, CaO, K2O, P205, Rb, Sr, Pb, Zn and low Na20, Nb, Zr, Ga and Y is an S-type granite, considered to be largely a product of partial anatexis and melt segregation from adjacent and underlying migmatitic metasediments during a high grade metamorphic event. The Basso Granodiorite with high Si02, Zr, Nb, Y and LREE and low CaO, Al203, MgO, V, Ba and Sr is a typical A-type granite, that is it formed from remelting of crust from which earlier granites had been extracted, or alternatively from fractionation of basaltic magma. It intrudes the host metasediments and is subsequently intruded by the Bimbowrie Granite. Thirdly, the Antro Tonalite exhibits I-type characteristics with high Fe203, Na20, CaO and Ti02 levels and low LREE and K2O. Rb-Sr dating produced an isochron age of 1642 ± 5 Ma for the Basso Granodiorite and metasedimentary units. The Rb-Sr isotope system is easily reset, and generally registers significantly younger ages. Hence, 1642 ± 5 Ma may reflect the timing of a metamorphic/deformational event. Sm-Nd isotope investigations into the Olary Block revealed a clustering of model ages. The Bimbowrie Granite has DM model ages of 2.6 - 2.67 Ga, recording the age of extraction from the mantle. One sample did however produce an age of 3.28 Ga, reflecting the granite’s source. That is, it may be sampling metasediment derived from older crust, present either as a basal sequence upon which the current stratigraphy is deposited or alternatively it may be sourcing a metasedimentary pile with a greater crustal residence time than the exposed metasediments. DM model age for the metasediment of 2.55 Ga further supports the notion that the Bimbowrie Granite formed as a result of in situ melting of the metasedimentary sequence. 2.12 - 2.13 Ga DM model ages were determined for the Basso Granodiorite. One sample did however have a TDM similar to the S-type granites of 2.61 Ga; this clearly indicates crustal contamination of this sample during emplacement, whereas the other samples reflect true mantle separation ages. Regardless of the exact rates of crustal growth, it is clear that large volumes of continental crust were formed during the Palaeo- Mesoproterozoic. Identification of crustal production peaks for the Australian continent at -3600 Ma, -2600 Ma, -2200 Ma and -1800 Ma by McCulloch (1987), are reinforced by the data obtained herein. Two peaks were established, one at -2600 Ma for the Bimbowrie Granite and the other at -2200 for the Basso Granodiorite. Controversy still remains over whether these periods are discrete growth episodes or simply reflect a variation in the rate of recycling of continental crust into the mantle.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1994
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Dello-Iacovo, M. "South Australian Heat Flow Anomaly: source and implications for geothermal energy." Thesis, 2014. http://hdl.handle.net/2440/109977.
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This item is only available electronically.The South Australian Heat Flow Anomaly is a broad region (>400 km wide) in Proterozoic South Australia defined by drill holes with anomalously high heat flow estimates yielding a mean of 92 +/- 10 mW m−2, compared to a global Proterozoic mean of 49-54 mW m−2. This study will conclusively determine the primary source of this anomalous heat flow. Thermal conductivities of 145 drill core samples have been measured using an optical thermal conductivity scanner. These were utilised with thermal conductivity and temperature profiles provided by Petratherm and the Department of State Development to make five new heat flow estimates in the Curnamona and Mount Painter provinces using the product and thermal resistance methods. Measured surface heat flows fall between 84.352 and 128.051 mW m−2. Significant lateral variations in surface heat flow support previous work suggesting shallow crustal radiogenic heat generation, primarily in Mesoproterozoic high heat producing granites. Analysis of existing deep seismic data has revealed a significantly cooler and thicker lithosphere in the Proterozoic South Australia compared with regions dominated by mantle heat flow such as southeastern Australia. Geotherms have been computed for steady-state regimes to demonstrate that the surface heat flow evident in the South Australian Heat Flow Anomaly is consistent with elevated upper crustal source. Thick, thermally insulating sedimentary cover in the Curnamona and Mount Painter provinces and high temperatures at shallow depths are encouraging for geothermal energy exploration, and geothermal prospectivity for these provinces was examined. Lateral thermal conductivity variations of stratigraphies in the Curnamona Province have been assessed, revealing that more data must be collected to use thermal conductivity from neighbouring boreholes as a proxy for heat flow estimates.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2014
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Kernich, A. "Weathering, erosion and element mobilisation in a catchment at the Luxemburg Copper/Gold site, Olary Domain, South Australia." Thesis, 2002. http://hdl.handle.net/2440/113085.
Повний текст джерелаАнотація:
This item is only available electronically.The Olary Domain, Curnamona Province has significant economic importance as a target for base metal and gold exploration. A veneer of Cainozoic or younger regolith occurs over large areas of the Olary Domain, which complicates mineral exploration. The study area is located within a small catchment at the old Luxemburg Cu/Au mining site in the mid North of South Australia in the Southern area of the Olary Domain. This investigation focuses on relating physical and chemical weathering processes present between basement amphibolite, granites and gneisses and a local waterway, including parameters such as bedrock geochemistry, regolith profile interpretation, channel morphology, and landscape evolution. Mapping the extent and character of the regolith in the Luxemburg area in a detailed Regolith Landform Map was also a large feature of this study. Results from the Regolith Landform Map allow inferences on the present day surface dispersion pathways. Geochemical investigations of the regolith profile within the catchment indicate a considerable fingerprint from the underlying amphibolite, specifically shown by Fe, Ti, Ni, Cr, V and Sc values. The elemental signature of the surface regolith reflects the underlying parent regolith units. Geochemical patterns within the ephemeral channel can be related to source geology, streambed morphology and landscape position. Harker plots and grain size analysis indicate that the channel sediment is chemically immature and La/Sc plots against Ti, Zr and Th illustrate that the amphibolite body primarily controls its elemental signature. The geochemistry of the underlying moderately weathered bedrock can be seen and deciphered in an area of iron rich, relatively thin regolith. Bedrock signatures are also evident within the chemistry of bulk samples from the local ephemeral channel deposits. Recent mining activity within the area does not seem to have influenced the results of this study.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2002
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Brett, D. "Structural, geochemical and isotopic investigation of granitoids within the central area of the eastern Weekeroo Inlier, Olary Domain, South Australia." Thesis, 1998. http://hdl.handle.net/2440/119992.
Повний текст джерелаАнотація:
This item is only available electronically.In the central part of the eastern Weekeroo Inlier, Olary Domain, two types of granite have been identified. This thesis explores both granite types in order to explain possible tectonic environments and geological evolution during the Proterozoic. The A-type Walter Outalpa granite is characterised by high Si02, Zr, Nb, Y, rare earth elements (REE) and low MgO, CaO, Ti02, P205 and light field strength elements (LFSE). High zircon saturation temperatures differentiate this fractionated A-type granite from potential fractionated I-type granites. The peraluminous granite is characterised by high Si0, Al203, Rb, U, Th, and low MgO, CaO, Ti02, Sr and light REE. It displays strong geochemical similarities to the Bimbowrie S-type granite. Consistent geochemical and isotopic characteristics for the Walter Outalpa granite and other similar A-type granites across the Olary Domain indicate a single regional crustal plus mantle source. Partial melting of lower Archaean crust due to lithospheric thinning is proposed. Geochemistry and isotopic analysis of the peraluminous granites suggest varying infracrustal sources for loosely grouped S-type granites in the Olary Domain. Previous interpretations for the depositional environment of the Willyama Supergroup metasediments in a continental rift setting are supported by comagmatic A-type volcanics and granites within the central part of the eastern Weekeroo Inlier. An extensional environment during emplacement is consistent with evidence for shallow level emplacement such as graphic texture, and the absence of a contact aureole for the Walter Outalpa granite. There is foliation development and evidence of folding for three deformation events during the Proterozoic Olarian Orogeny. Timing relationships between granitoids and metasediments in this area have constrained relative timing of emplacement. Low temperature solid state deformation affected the A-type Walter Outalpa granite after emplacement into Willyama Supergroup metasediments. Crosscutting relationships between the peraluminous granite and adjacent deformed metasediments imply a late to post D2 emplacement for this granite.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1998
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Gill, R. M. "A magnetotelluric profile across the Broken Hill and Olary Domains." Thesis, 2002. http://hdl.handle.net/2440/113040.
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This item is only available electronically.Seventeen magnetotelluric survey sites were occupied across the Olary and Broken Hill Domains in the Curnamona Province, Australia. Two dimensional modelling along the magnetotelluric profile identifies the Broken Hill Domain as a zone of high electrical resistivity to a depth of 15km. Gravity modelling along a coincident profile has also shown the Broken Hill Domain to be significantly more dense than its surrounds. Seismic data have provided evidence of numerous faults and shear zones within the Pre-cambrian Broken Hill Domain basement, and is indicative of compression during the Delamarian Orogeny. It is proposed that the majority of crustal fluids were removed from these rocks by granulite facies metamorphism and tectonic compression. The boundary of the Olary Domain appears to be delineated by the Mundi Mundi Fault with an order of magnitude increase in resistivity on the Broken Hill side. The location of the Flinders Conductivity Anomaly was also observed and a number of conducting mechanisms considered, including crustal fluids and graphite films.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2002
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Brotodewo, A. "Constraints on Mesoproterozoic magmatism and deformation in the southern Gawler Craton, South Australia: magmatism and deformation in Yorke Peninsula." Thesis, 2016. http://hdl.handle.net/2440/120548.
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This item is only available electronically.The ca. 1600–1580 Ma time slice is recognised as a significant period of magmatism and deformation throughout eastern Proterozoic Australia. Within the northern Yorke Peninsula, this period was associated with the emplacement of multiple phases of the Tickera Granite; an intensely foliated orange granite, a white leucogranite and a red granite. These granites belong to the broader Hiltaba Suite that was emplaced at shallow crustal levels, throughout the Gawler Craton. Geochemical and isotopic analysis suggests these granite phases were derived from a heterogeneous source region. The orange and red granites were derived from the Donington Suite and/or the Wallaroo Group metasediments with slight contamination from an Archean basement. The white leucogranite is sourced from a similar but slightly more mafic/lower crustal source. Phases of the Tickera Granite were emplaced synchronously with deformation that resulted in development of a prominent northeast trending structural grain throughout the Yorke Peninsula region. This fabric is a composite of two fold generations; early isoclinal folds that were refolded by later open upright folds. Isoclinal folding may have occurred during the ca. 1730–1690 Ma Kimban Orogeny, or just prior to emplacement of the Tickera Granite at ca. 1597–1577 Ma. The upright fold generation was contemporaneous with the emplacement of the Tickera Granite. The Yorke Peninsula shares a common geological history with the Curnamona Province, which was deformed during the ca. 1600–1585 Ma Olarian Orogeny, and resulted in development of early isoclinal (recumbent) folds overprinted by an upright fold generation, a dominant northeast–trending structural grain and spatially and temporally related intrusions. This suggests an apparent correlation with the geological history of the Curnamona Province, and that the Olarian Orogeny may have also affected the southeastern Gawler Craton. Constraint on the timing of the earlier isoclinal fold generation in the Yorke Peninsula will allow further understanding of the similarities between the two regions.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2016
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Chalk, H. C. "Mesoproterozoic bimodal magmatism of southern Australia: assessing relative mantle input and implications for IOCG mineralisation prospectivity." Thesis, 2014. http://hdl.handle.net/2440/109703.
Повний текст джерелаАнотація:
This item is only available electronically.Mesoproterozoic magmatism of the Gawler Craton and the Curnamona Province demonstrates regions of variable mantle input characteristics. Zircons from Hiltaba Suite granitoids and Gawler Range Volcanics, Gawler Craton, return εHf(T) values ranging from +7.1 to -0.4, +2.0 to -7.4, and +0.2 to -5.3 from the western, central, and eastern Gawler Craton respectively. Ninnerie Supersuite granitoids and Benagerie Volcanic Suite, Curnamona Province, return εHf(T) values ranging from +2.5 to -3.8. Mantle input modelling of the central/eastern Gawler Craton and the Curnamona Province returns similar mantle input fraction values ranging from 0.1 to 0.6, averaging 0.3, and 0.1 to 0.6, averaging 0.3, respectively. Hiltaba Suite magmatism of the western Gawler Craton is compositionally more juvenile than the central and eastern regions. The western Gawler Craton mantle input fractions range from 0.2 to 0.9 averaging 0.5, more elevated than the central/eastern regions of the Gawler Craton and the Curnamona province. The Benagerie Ridge region of the Curnamona Province displays similar bimodal ca. 1590 Ma magmatism, εHf(T) values, mantle input characteristics, crustal preservation (exhumation) and regional iron oxide copper-gold alteration as the highly prospective Olympic IOCG Province, Gawler Craton.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2014