Готові списки джерел за темами / Mt Isa Inlier

Добірка наукової літератури з теми "Mt Isa Inlier"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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Статті в журналах з теми "Mt Isa Inlier"

Betts, P. G., D. Giles, G. Mark, G. S. Lister, B. R. Goleby, and L. Aillères. "Synthesis of the proterozoic evolution of the Mt Isa Inlier." Australian Journal of Earth Sciences 53, no. 1 (February 2006): 187–211. http://dx.doi.org/10.1080/08120090500434625.

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Loosveld, Ramon, and Guido Schreurs. "Discovery of thrust klippen, northwest of Mary Kathleen, Mt Isa Inlier, Australia." Australian Journal of Earth Sciences 34, no. 3 (September 1987): 387–402. http://dx.doi.org/10.1080/08120098708729419.

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Williams, Neil. "Geology of the Mt. Isa inlier and environs, Queensland and Northern Territory." Earth-Science Reviews 32, no. 3 (April 1992): 231–32. http://dx.doi.org/10.1016/0012-8252(92)90060-7.

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Derrick, G. M. "Brothers in Arms: The Interaction of Geology and Geophysics in the Mt Isa Inlier." Exploration Geophysics 23, no. 1-2 (March 1992): 117–22. http://dx.doi.org/10.1071/eg992117.

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Page, R. W., and S‐S Sun. "Aspects of geochronology and crustal evolution in the Eastern Fold Belt, Mt Isa Inlier∗." Australian Journal of Earth Sciences 45, no. 3 (June 1998): 343–61. http://dx.doi.org/10.1080/08120099808728396.

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Rubenach, M. J., and A. J. Barker. "Metamorphic and metasomatic evolution of the Snake Creek Anticline, Eastern Succession, Mt Isa Inlier." Australian Journal of Earth Sciences 45, no. 3 (June 1998): 363–72. http://dx.doi.org/10.1080/08120099808728397.

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Belousova, E. A., S. Walters, W. L. Griffin, and S. Y. O'Reilly. "Trace‐element signatures of apatites in granitoids from the Mt Isa Inlier, northwestern Queensland." Australian Journal of Earth Sciences 48, no. 4 (August 2001): 603–19. http://dx.doi.org/10.1046/j.1440-0952.2001.00879.x.

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Giles, D., P. G. Betts, L. Aillères, B. Hulscher, M. Hough, and G. S. Lister. "Evolution of the Isan Orogeny at the southeastern margin of the Mt Isa Inlier." Australian Journal of Earth Sciences 53, no. 1 (February 2006): 91–108. http://dx.doi.org/10.1080/08120090500432470.

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Ford, A., and T. G. Blenkinsop. "Evaluating geological complexity and complexity gradients as controls on copper mineralisation, Mt Isa Inlier." Australian Journal of Earth Sciences 55, no. 1 (February 2008): 13–23. http://dx.doi.org/10.1080/08120090701581364.

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Blenkinsop, Tom, Cameron Huddlestone-Holmes, Piter Lepong, Mark Edmiston, Damien Foster, Jim Austin, Geordie Mark, Arianne Ford, and Barry Murphy. "Inversion in the Eastern Succession of the Mt Isa inlier: A key to crustal architecture." ASEG Extended Abstracts 2006, no. 1 (December 2006): 1–6. http://dx.doi.org/10.1071/aseg2006ab017.

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Дисертації з теми "Mt Isa Inlier"

Marsh, Stuart Harry. "Geological mapping in the proterozoic Mt. Isa Inlier, Queensland, Australia, using radiometric and multispectral remotely sensed data." Thesis, Durham University, 1992. http://etheses.dur.ac.uk/5723/.

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Landsat Thematic Mapper, NSOOl Aircraft Thematic Mapper, Geoscan Mk. II. Multispectral Scanner and Airborne Gamma Radiometric data have been used to address a variety of geological problems in the Mary Kathleen area, 60 km east of Mt. Isa, NW Queensland. This area forms part of the Cloncurry Complex, a structurally complicated mass of diverse igneous and metamorphic rocks in the Precambrian Mt. Isa Inlier for which many stratigraphic problems remain to be solved. The Landsat Thematic Mapper data have been the most extensively used in this study. They are the least problematic data type and provide new geological information at scales up to 1:50 000. The NSOOl Aircraft Thematic Mapper data have similar spectral but superior spatial resolution in comparison with the satellite data. They suffer from increased geometric and noise-related problems, but the increase in spatial resolution has allowed the solution of problems, at scales up to 1:10 000, which could not be comprehensively addressed with the satellite data. The higher spectral resolution Geoscan Mk. II Multispectral Scanner aircraft data used in the latter part of the study can be used to remotely identify surface mineralogy. The logarithmic residual technique has proved the most successful approach to enhancing the radiance data sets. When applied to the lower spectral resolution data the technique achieves good discrimination of most lithologies, produces an albedo image useful for structural mapping and yields more information than can be extracted using conventional techniques. When applied to the higher spectral resolution data the technique allows remote mineral identification. Many of the geological problems in the area have been wholly or partially solved using suitably processed radiance data. The Airborne Gamma Radiometric data have the lowest spatial resolution. Only discrimination has been possible with this data set. These data contain no terrain information and are therefore difficult to use in the field. Integration of the gamma radiometric data with satellite data has been successful in overcoming this problem. The gamma radiometric data have allowed the separation of some lithologies which cannot be separated using the radiance data sets but have contrasting radiometric counts.

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Keys, Damien Leslie. "Mechanical localisation of copper deposits in the Mt Isa Inlier, North Queensland." Thesis, 2008. https://researchonline.jcu.edu.au/29144/1/29144_Keys_2008_Thesis.pdf.

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Copper mineralisation in the Mt Isa Inlier is typically associated with brittle deformation that has taken place during the ESE-WNW oriented D₄ event of the Isan Orogeny. Distinct element modelling of deposit-scale fault arrays has provided an extraordinary tool in the elucidation of far-field stresses and prime conditions for rock failure associated with mineralisation. Not only does the deposit-scale modelling results match well with regional-scale models, they provide a future way in which prospectivity analysis can be improved. With only one known exception (Osborne) the bulk of the copper mineralisation in the Mt Isa Inlier is aged between 1530 Ma and 1505 Ma. The only age constraints on the D₄ deformation event are from the Snake Creek Anticline (foliation development associated with the intrusion of the Saxby Granite) and from the dating of the specific mineral deposits e.g. Ernest Henry. The Snake Creek age of D₄ is 1527±4 Ma and age dates from mineralised structures within the individual deposits vary from 1530 Ma to 1505 Ma. The typically brittle D₄ deformation event occurs late in the Isan Orogeny and is only seen to have a ductile character in deformation around the intruding granites of the Williams and Naraku batholiths. In these locations D₄ can be seen expressed as a ductile foliation and in limited sites is associated with porphyroblast growth. The D₄ deformation event, when associated with economic copper grades, is typically brittle and as such requires specific mechanical conditions. Most importantly, it appears that temperature was a primary control, such that if temperatures exceeded the onset of quartz creep (350 ºC), brittle failure did not occur and conditions for mineralisation were inappropriate. Ar-Ar dating of minerals appears to be a useful way of discriminating between rocks that are likely to fail via brittle modes versus brittle-ductile or ductile conditions. Consequently it is apparent that most of the copper deposits are found in areas where biotite Ar-Ar ages indicate the rocks had cooled sufficiently to behave brittley at around 1530 Ma. Conversely, rocks adjacent to granites or otherwise showing protracted cooling histories (e.g. Ar-Ar in hornblende younger than 1520 Ma) did not cool to brittle conditions quickly enough to allow the coincidence of brittle deformation and copper mineralisation. The host rocks to mineralisation are typically at depths of 5 to 8 km at the time of mineralisation. In a hot orogen, this implies that these rocks are nearly at the brittle-ductile transition themselves. Earthquake nucleation is known to occur at depth near this transition. Sibson (1989) proposed that rupture nucleation and the direction of earthquake rupture propagation could be a useful tool in prediction of dilatant sites and hence prospective sites for Mt Isa style copper mineralisation. An example of how this technique could be used was conducted on the Mt Gordon Fault Zone. The D₄ mineralisation event also coincides with cratonisation of the Mt Isa Inlier and a large change in the apparent polar wander path. This may have been triggered by collision of Baltica with the Laurentian supercontinent, causing a switch in convergence along the Laurentia-NAC boundary and providing the right conditions for low strain strike slip deformation and the ingress of copper-bearing fluids into the exhuming Isan orogenic belt.

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Baruleva, Olga. "The Geological Architecture of the Iron-Oxide Copper-Gold (IOCG) corridor at the Mt Isa Inlier." Master's thesis, 2019. http://hdl.handle.net/1885/170621.

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The iron-oxide copper-gold (IOCG) corridor of the Proterozoic Mt Isa Inlier (NW Queensland, Australia) is a remarkable and sizeable concentration of high-grade Cu-Au, Pb-Zn-Ag and Mo-rare earth element deposits, which can be traced N-S, from Kuridala to Osborne. Shear zones and brittle faults structurally controlled the ore deposition by serving as conduits and providing efficient structural and geochemical traps. The recognition of the evolution of these zones, in the context of the broader geological architecture, will enhance future mineral discoveries. Field mapping, microstructural studies and K-feldspar 40Ar/39Ar geochronology and thermochronometry have allowed us to decipher the essential tectonothermal events that occurred in association with the ore-controlling structures, both during and after the Isan Orogeny. We suggest the Isan Orogeny modified tectonic scenario, as implied by the switching between extensional and compressional modes. Two episodes of extension were confirmed. The first was associated with the exhumation of the high-temperature/low-pressure metamorphic rocks of the Double Crossing Metamorphics at 1650-1600 Ma. The second event is confirmed occurring around 1530-1535 Ma, and was responsible for the exhumation of the medium temperature/medium pressure schist belt of the Mt Cobalt area. The extensional structures, originating from synsedimentary basin faulting, controlled the distribution of the contrasting metamorphic belts and metasomatic alteration. The post-Isan Orogeny tectonothermal events occurred preferentially along the active fault zones. The Mt Dore Fault Zone experienced multiple episodes of relatively rapid cooling (1-11 C/Myr), indicating that episodes of thrusting occurred at ~1350-1300 Ma and ~1250-1200 Ma, reflecting far-field responses to soft and hard collisions between the Northern and Western Australian Cratons and the Mawson Craton at that time. Subsequent isothermal phases were coupled with low-temperature potassium-iron metasomatism at ~1120 Ma and 830 Ma. Thermal pulses took place at ~900 Ma and ~740 Ma, explained by the uplifting of geotherms associated with continental rifting resuling from the break-up of Rodinia. This geological evolution determined the distribution of the IOCG mineralisation, which accumulated in favourable elements of the geological architecture, including: (1) synsedimentary basin structures that experienced repeated inversion-extension cycles; (2) a fault intersection setting that produced local dilatation zones; and (3) later thrusts that preferentially preserved ore pockets. The recognition of post-Isan Orogeny fault tectonics should be considered a new tool for mineral exploration in the region. In addition, the thermochronology results from the Mt Dore Fault Zone highlighted the most favourable level of erosion for the preservation of the mineralisation.

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Murison, C. "Characteristics and ore genesis of the Mount Cuthbert deposit, Kalkadoon-Leichardt Belt, Mt Isa Inlier, north west Queensland." Thesis, 2015. http://hdl.handle.net/2440/118206.

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The Mount Cuthbert mine is situated ~100km NE of Mt Isa near the eastern edge of the Kalkadoon Leichhardt Belt (KLB); a Proterozioc block of the Mt Isa Inlier that divides the world class mineral regions of the IOCG-style Eastern Fold Belt (EFB) and the Mount Isa style copper deposits of the Western Fold Belt (WFB). KLB hosted deposits display characteristics related to both the EFB and WFB style of mineralisation; however mineralisation at Mount Cuthbert is indicative of a genesis for KLB hosted deposits related to metasomatic and tectonic events responsible for mineralisation in the EFB. The Mount Cuthbert mine is a low tonnage-high grade, shear controlled, retrograde chalcopyrite-pyrite-pyrrhotite deposit hosted within silica-dolomite and biotite-chlorite altered schists and felsic volcanic units of the Leichhardt Volcanics. The paragenetic alteration sequence is composed of 5 alteration stages: Stage 1) sodic alteration (albite + quartz); Stage 2) K-Fe-Ca alteration (siderite + calcite + dolomite+ quartz + biotite ± magnetite ± ilmenite ± apatite ± pyrite); Stage 3) mineralisation (chalcopyrite + quartz ± pyrite ± pyrrhotite ± calcite ± chlorite); Stage 4) major chloritisation; Stage 5) oxidation and localised enrichment to chalcocite. The alteration halo within the deposit is characterised by a proximal alteration envelope (<50m) consisting of chalcopyrite, pyrite, quartz, dolomite and chlorite, an intermediate alteration envelope (50-500m) described by quartz-carbonate veining with minor chalcopyrite, pyrite and pyrrhotite, in addition to extensive biotite and chlorite alteration and minor magnetite alteration. A distal alteration envelope (>500m) is identified tentatively as albite dominant. The trace geochemistry of the main chalcopyrite ± pyrite ore phase reveals elevated Ni, Zn, Cd and Hg in pyrite and elevated Sn, Pb, Se, V, Cr, Te, Ga, As, Cd, Mo, Ga, Bi and Sb in chalcopyrite. Differing elemental trends within the ore minerals supports paragenetic evidence suggesting several phases of sulphide growth. The characteristics and features of the Mount Cuthbert deposit outlined in this study show the greatest number of similarities to other low tonnage-high grade, shear hosted deposits present in the KLB (i.e. Mighty Atom, Orphan). This suggests that despite having a genesis related to that of the EFB, KLB deposits are uniquely their own style of mineralisation. This supports a shear-zone associated exploration model that is specific to the KLB.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2015

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Sayab, Mohammad. "N-S shortening during orogenesis in the Mt Isa Inlier: the preservation of W-E structures and their tectonic and metamorphic significance." Thesis, 2005. https://researchonline.jcu.edu.au/1324/1/01front.pdf.

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Mesoproterozoic Mt Isa inlier of NW Queensland exhibits complex tectonometamorphic history that is generally considered to result from low-pressure/high-temperature (LP/HT) metamorphism with an anticlockwise pressure-temperature-deformation path. Yet studies regarding the nature of the P-T history and tectonic regime that led to such a LP/HT signature have been quite limited. A detailed FIA (Foliation Intersection/Inflection Axes preserved in the porphyroblasts) analysis combined with textural relationships and P-T pseudosections, using key localities across the Eastern Fold Belt of the Mt Isa Inlier, has resolved the cause of the LP/HT signature. Measurement of FIAs in the Eastern Fold Belt has revealed phases of deformation and metamorphism that could not previously be distinguished from one another. Both the ‘asymmetry switch’ and ‘FitPitch’ FIA measurement techniques have been applied to key localities of polymetamorphosed and multiply deformed Eastern Fold Belt, and they yielded the same result. These independent techniques have revealed (1) W-E trending structures that formed during N-S bulk shortening (O1) and N-S oriented structures that formed during W-E bulk shortening (O2) in the Eastern Fold Belt, (2) the presence of separate periods of metamorphism associated with each direction of bulk shortening, and (3) the crustal scale tectonic processes associated with polymetamorphism. The structural overprinting relationships do not support previously suggested non-coaxial west vergent, nappe-style folding in the region. A progressive succession of overprinted FIA trends reveals a clockwise rotation of the principal direction of bulk shortening with time. This requires a radical shift of relative plate movement from N-S to W-E during development of the north Australian craton in the Mesoproterozoic (ca 1.60 and 1.50Ga). Significantly, O1 porphyroblasts preserving W-E FIAs exhibit mineral textures of Barrovian style, whereas O2 formed porphyroblasts preserving N-S FIAs are Buchan in style. This supports the emplacement of the Williams/Naraku Batholiths after O1 around the onset of O2. Higher-pressure garnet cores, modeled in MnNCKFMASH P-T pseudosections preserved early W-E FIAs and formed during O1. This was followed by decompression and then low pressure – high temperature (LP/HT) metamorphism when N-S FIAs were preserved within porphyroblasts. This is further supported by the presences of at least two distinctive generations of staurolite and kyanite that grew both before and after andalusite/cordierite. Middle to upper amphibolite facies metamorphic conditions occurred during O1 with crustal thickening followed by fast erosion and near-isothermal decompression leading to LP/HT conditions. This was followed by O2 and a second period of middle- to upper- amphibolite facies metamorphism that obliterated and/or obscured the tectonometamorphic signature of primitive O1 in the matrix of most rocks. This history appears to correlate better with that observed in the southwest United States, which may have been located against the NE of the Australia at this period in time.

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Тези доповідей конференцій з теми "Mt Isa Inlier"

Popov, Daniil, Richard Spikings, Maria Ovtcharova, Alexey Ulianov, Gary O'Sullivan, Massimo Chiaradia, David Chew, Eszter Badenszki, Stephen Daly, and Joshua Davies. "Multi-method approach to understanding the migration mechanisms of Pb in apatite and Ar in alkali feldspar from Proterozoic granitic batholiths from the Mt. Isa Inlier (Australia)." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6981.

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Звіти організацій з теми "Mt Isa Inlier"

Harrison, J. C., B. M. Saumur, and D. R. Skipton. Mineral and carving-stone resources of Baffin Island. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321858.

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Mineral resources of Baffin Island include iron (Mary River), diamonds, carbonate-hosted zinc and lead (Nanisivik), nickel, copper, platinum group elements, uranium, thorium, gemstones (sapphire, spinel, lapis lazuli), carving stone, and coal. Iron deposits include the Mary River No. 1 to 4 deposits of northern Baffin Island, which came into production in 2015 and contain 586 Mt grading 66% Fe. The Mesoproterozoic Borden Basin hosts the Nanisivik deposit, mined between 1976 and 2002; this is a Mississippi Valley-type deposit and contains 9.0% Zn, 0.7% Pb, and 41 ppm Ag. Diamond-rich kimberlite occurs as sheets and small pipes at Chidliak on Hall Peninsula; largest by area is the CH-1 (6 ha) pipe. At least 32 carving-stone localities are known; 7 communities on Baffin Island have good access to quarried material. Coal occurs in the Cretaceous-Paleogene Eclipse Trough of Bylot and northwestern Baffin islands. Exposures near Pond Inlet have been excavated for local use.

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