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Published: 10 December 2022

Last updated: 28 January 2023

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1

O'dea, Mark G., and Gordon S. Lister. "The role of ductility contrast and basement architecture in the structural evolution of the Crystal Creek block, Mount Isa Inlier, NW Queensland, Australia." Journal of Structural Geology 17, no. 7 (July 1995): 949–60. http://dx.doi.org/10.1016/0191-8141(94)00117-i.

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2

Hutton, Laurie, Melanie Fitzell, Kinta Hoffmann, Ian Withnall, Bernie Stockill, Ben Jupp, and Paul Donchak. "The Millungera Basin—new geoscience supporting exploration." APPEA Journal 50, no. 2 (2010): 727. http://dx.doi.org/10.1071/aj09091.

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An unknown sedimentary sequence was first recorded during a Geoscience Australia/ Geological Survey of Queensland/ pmd*CRC deep seismic reflection survey in the Mount Isa Inlier and adjacent undercover terrains, during 2006/07. The sequence occurs unconformably underneath the Carpentaria Basin succession in the Julia Creek area, east of Cloncurry in north Queensland, and is named the Millungera Basin. A section through the basin is recorded along seismic line 07GA–IG1, recorded between north of Cloncurry to east of Croydon. In this section three internal sequences are noted—with two strongly reflective units separated by a poorly reflective unit. As well as deep crustal seismic reflection profiles, magnetotelluric profiles were collected along the same traverse. These data show a moderately conductive Millungera Basin underlying the strongly conductive Carpentaria Basin. Zones of limited reflectors beneath the basin in the seismic sections have been interpreted as granites, raising the possibility of raised geothermal gradients. The Millungera Basin may comprise a potential geothermal target. The Millungera Basin sequence is interpreted to overlie granites. Adjacent Proterozoic granites of the Williams Batholith are known to be high heat producing granites, containing high levels of potassium thorium and uranium. The hydrocarbon potential of the basin is similarly uncertain. Strong reflectors in the seismic sections may be coal beds. Although the depth of the basin in the seismic section is insufficient to have reached the oil window, interpretation of gravity profiles by Geoscience Australia suggest the basin deepens to the south, possibly reaching 4,000 m. If fertile beds have reached the oil window, the structurally more complex eastern side of the basin may contain petroleum traps. The age of the rocks in the Millungera Basin is not known. Constraints from the seismic suggest between the early Mesoproterozoic and the Middle Jurassic. Investigations into the nature of the basin are continuing. A more detailed magnetotellurc survey is being undertaken to better define the shape of the basin. In order to reliably describe the basins components, a deep drilling program is required.

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3

Passchier, C. W., and P. R. Williams. "Proterozoic extensional deformation in the Mount Isa inlier, Queensland, Australia." Geological Magazine 126, no. 1 (January 1989): 43–53. http://dx.doi.org/10.1017/s0016756800006130.

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AbstractThe earliest of four distinct phases of deformation recognized in the central part of the Proterozoic Mount Isa inlier involved brittle extensional faulting at shallow crustal levels. Extensional faulting produced stacks of imbricate fault slices, listric normal faults and characteristic tourmalinerich breccias. Structures belonging to this phase occur over a large part of the inlier and indicate an important phase of basin-forming crustal or lithospheric extension at 1750–1730 Ma. Late intense ductile deformation and tight folding of the imbricate systems destroyed part of these older structures, and obscures their existence in many parts of the inlier.

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4

McConachie, B. A., M. G. Barlow, J. N. Dunster, R. A. Meaney, and A. O. Schaap. "THE MOUNT ISA BASIN—DEFINITION, STRUCTURE AND PETROLEUM GEOLOGY." APPEA Journal 33, no. 1 (1993): 237. http://dx.doi.org/10.1071/aj92018.

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The Mount Isa Basin is a new concept to describe the area of Palaeo- to Mesoproterozoic rocks south of the Murphy Inlier (not the Murphy Tectonic Ridge) and inappropriately described as the Mount Isa Inlier. The new basin concept presented in this paper allows the characterisation of basin-wide structural deformation and the recognition of areas with petroleum exploration potential.The northern depositional margin of the Mount Isa Basin is the metamorphic, intrusive and volcanic complex referred to as the Murphy Inlier. The eastern, southern and western boundaries of the basin are obscured by younger basins (Carpentaria, Eromanga and Georgina Basins). The Murphy Inlier rocks comprise the seismic basement to the Mount Isa Basin sequence. Evidence for the continuity of the Mount Isa Basin with the McArthur Basin to the northwest and the Willyama Block (Basin) at Broken Hill to the south is presented. These areas combined with several other areas of similar age are believed to have comprised the Carpentarian Superbasin.The application of seismic exploration within Authority to Prospect (ATP) 423P at the northern margin of the basin was critical to the recognition and definition of the Mount Isa Basin. The northern Mount Isa Basin is structurally analogous to the Palaeozoic Arkoma Basin of Oklahoma and Arkansas in the southern USA but as with all basins it contains unique characteristics, a function of its individual development history. The northern Mount Isa Basin is defined as the basin area northwest of the Mount Gordon Fault.

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5

Jayawardhana, Prasantha Michael, and S. N. Sheard. "The use of airborne gamma‐ray spectrometry—A case study from the Mount Isa inlier, northwest Queensland, Australia." GEOPHYSICS 65, no. 6 (November 2000): 1993–2000. http://dx.doi.org/10.1190/1.1444883.

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An airborne survey was undertaken on the Mount Isa inlier in 1990–1992. During this survey, both airborne magnetic and gamma‐ray spectrometric data were recorded over 639 170 line-km. Because of perceived value of the radiometric data, stringent calibration procedures, including the creation of a test range, were adopted. In addition to the data from the newly‐flown areas, 76 760 line‐km of existing data were acquired from other companies, and were reprocessed and merged with the Mount Isa survey. The total area covered by the Mount Isa airborne survey was 151 300 km2. Over the last five years, several studies have been undertaken that seek to exploit the Mount Isa region gamma‐ray database and maximise the use of radiometrics for mineral exploration. This paper highlights the results of these studies by focussing on radiometric signatures of major mines in the Mount Isa Inlier, radioelement contour maps, geomagnetic/radiometric interpretation maps, lithological mapping, regolith mapping, geochemical sampling, and spatial modeling using geographical information systems (GIS). Due to the recent introduction of GIS technology and better techniques for handling high quality digital data, there has been a revived interest in making more use of image data sets. The integration of raster and vector data sets for both spectral and spatial modeling has maximized the potential of this approach.

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6

Stumpfl, E. F. "Geology of the Mount Isa Inlier and Environs, Queensland and Northern Territory." Ore Geology Reviews 4, no. 3 (March 1989): 275–76. http://dx.doi.org/10.1016/0169-1368(89)90020-6.

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7

Neudert, Martin K. "Geology of the Mount Isa Inlier and Environs, Queensland and Northern Territory." Earth-Science Reviews 27, no. 3 (May 1990): 277–78. http://dx.doi.org/10.1016/0012-8252(90)90014-m.

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8

Salama, Walid, Michael F. Gazley, and Lindsay C. Bonnett. "Geochemical exploration for supergene copper oxide deposits, Mount Isa Inlier, NW Queensland, Australia." Journal of Geochemical Exploration 168 (September 2016): 72–102. http://dx.doi.org/10.1016/j.gexplo.2016.05.008.

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9

Williams, Patrick J., and Maree Heinemann. "Maramungee; a Proterozoic Zn skarn in the Cloncurry District, Mount Isa Inlier, Queensland, Australia." Economic Geology 88, no. 5 (August 1, 1993): 1114–34. http://dx.doi.org/10.2113/gsecongeo.88.5.1114.

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10

Loosveld, Ramon J. H. "The intra-cratonic evolution of the central eastern Mount Isa Inlier, northwest Queensland, Australia." Precambrian Research 44, no. 3-4 (October 1989): 243–76. http://dx.doi.org/10.1016/0301-9268(89)90047-8.

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11

Le, Truong X., Paul H. G. M. Dirks, Ioan V. Sanislav, Jan M. Huizenga, Helen A. Cocker, and Grace N. Manestar. "Geological setting and mineralization characteristics of the Tick Hill Gold Deposit, Mount Isa Inlier, Queensland, Australia." Ore Geology Reviews 137 (October 2021): 104288. http://dx.doi.org/10.1016/j.oregeorev.2021.104288.

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12

Williams, P. R. "Nature and timing of early extensional structures in the Mitakoodi Quartzite, Mount Isa Inlier, northwest Queensland." Australian Journal of Earth Sciences 36, no. 2 (June 1989): 283–96. http://dx.doi.org/10.1080/08120098908729487.

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13

Ying, Hanlong, and Chuanjie Pu. "Occurrence and composition of sphene from eastern fold belt, Mount Isa Inlier, Cloncurry, northwestern Queensland, Australia." Chinese Journal of Geochemistry 24, no. 1 (January 2005): 18–27. http://dx.doi.org/10.1007/bf02869685.

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14

Stewart, Alastair J. "Extensional faulting as the explanation for the Deighton ‘Klippe’ and other Mount Albert Group outliers, Mount Isa Inlier, northwestern Queensland." Australian Journal of Earth Sciences 36, no. 3 (September 1989): 405–21. http://dx.doi.org/10.1080/08120098908729497.

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15

Whitelock, J. P. "Discussion: Nature and timing of early extensional structures in the Mitakoodi Quartzite, Mount Isa Inlier, northwest Queensland." Australian Journal of Earth Sciences 39, no. 1 (February 1992): 123–24. http://dx.doi.org/10.1080/08120099208728008.

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16

Xu, G. "Structural geology of the Dugald River ZnPbAg deposit, Mount Isa Inlier, Australia." Ore Geology Reviews 11, no. 6 (December 1996): 339–61. http://dx.doi.org/10.1016/s0169-1368(96)00007-8.

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17

Williams, P. R. "Reply to discussion: Nature and timing of early extensional structures in the Mitakoodi Quartzite, Mount Isa Inlier, northwest Queensland." Australian Journal of Earth Sciences 39, no. 1 (February 1992): 125–26. http://dx.doi.org/10.1080/08120099208728009.

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18

Duncan, R. J., I. S. Buick, K. Kobayashi, and A. R. Wilde. "Chemical and stable isotopic characteristics of syn-tectonic tourmaline from the Western fold belt, Mount Isa inlier, Queensland, Australia." Chemical Geology 381 (August 2014): 131–43. http://dx.doi.org/10.1016/j.chemgeo.2014.05.002.

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19

Eriksson, K. A., S. R. Taylor, and R. J. Korsch. "Geochemistry of 1.8-1.67 Ga mudstones and siltstones from the Mount Isa Inlier, Queensland Australia: Provenance and tectonic implications." Geochimica et Cosmochimica Acta 56, no. 3 (March 1992): 899–909. http://dx.doi.org/10.1016/0016-7037(92)90035-h.

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20

Bodon, Stephen B. "Paragenetic relationships and their implications for ore genesis at the Cannington Ag-Pb-Zn deposit, Mount Isa Inlier, Queensland, Australia." Economic Geology 93, no. 8 (December 1, 1998): 1463–88. http://dx.doi.org/10.2113/gsecongeo.93.8.1463.

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21

Bell, T. H., W. G. Perkins, and C. P. Swager. "Structural controls on development and localization of syntectonic copper mineralization at Mount Isa, Queensland." Economic Geology 83, no. 1 (February 1, 1988): 69–85. http://dx.doi.org/10.2113/gsecongeo.83.1.69.

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22

RUBENACH, M. J. "Proterozoic low-pressure/high-temperature metamorphism and an anticlockwise P?T?t path for the Hazeldene area, Mount Isa Inlier, Queensland, Australia." Journal of Metamorphic Geology 10, no. 3 (May 1992): 333–46. http://dx.doi.org/10.1111/j.1525-1314.1992.tb00088.x.

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23

Spampinato, G. P. T., P. G. Betts, L. Ailleres, and R. J. Armit. "Structural architecture of the southern Mount Isa terrane in Queensland inferred from magnetic and gravity data." Precambrian Research 269 (October 2015): 261–80. http://dx.doi.org/10.1016/j.precamres.2015.08.017.

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24

Bierlein, F. P., R. Maas, and J. Woodhead. "Pre-1.8 Ga tectono-magmatic evolution of the Kalkadoon–Leichhardt Belt: implications for the crustal architecture and metallogeny of the Mount Isa Inlier, northwest Queensland, Australia." Australian Journal of Earth Sciences 58, no. 8 (June 27, 2011): 887–915. http://dx.doi.org/10.1080/08120099.2011.571286.

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25

BEARDSMORE, T., S. NEWBERY, and W. LAING. "The Maronan Supergroup: an inferred early volcanosedimentary rift sequence in the Mount Isa Inlier, and its implications for ensialic rifting in the Middle Proterozoic of northwest Queensland." Precambrian Research 40-41 (October 1988): 487–507. http://dx.doi.org/10.1016/0301-9268(88)90082-4.

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26

Ford, A., and T. G. Blenkinsop. "Combining fractal analysis of mineral deposit clustering with weights of evidence to evaluate patterns of mineralization: Application to copper deposits of the Mount Isa Inlier, NW Queensland, Australia." Ore Geology Reviews 33, no. 3-4 (June 2008): 435–50. http://dx.doi.org/10.1016/j.oregeorev.2007.01.004.

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27

Baker, Michael J., Anthony J. Crawford, and Ian W. Withnall. "Geochemical, Sm–Nd isotopic characteristics and petrogenesis of Paleoproterozoic mafic rocks from the Georgetown Inlier, north Queensland: Implications for relationship with the Broken Hill and Mount Isa Eastern Succession." Precambrian Research 177, no. 1-2 (February 2010): 39–54. http://dx.doi.org/10.1016/j.precamres.2009.11.003.

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28

Sayab, Mohammad. "Microstructural evidence for N–S shortening in the Mount Isa Inlier (NW Queensland, Australia): the preservation of early W–E-trending foliations in porphyroblasts revealed by independent 3D measurement techniques." Journal of Structural Geology 27, no. 8 (August 2005): 1445–68. http://dx.doi.org/10.1016/j.jsg.2005.01.013.

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29

Austin, J. R., and T. G. Blenkinsop. "Local to regional scale structural controls on mineralisation and the importance of a major lineament in the eastern Mount Isa Inlier, Australia: Review and analysis with autocorrelation and weights of evidence." Ore Geology Reviews 35, no. 3-4 (June 2009): 298–316. http://dx.doi.org/10.1016/j.oregeorev.2009.03.004.

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30

Cave, Bradley, Richard Lilly, Stijn Glorie, and Jack Gillespie. "Geology, Apatite Geochronology, and Geochemistry of the Ernest Henry Inter-Lens: Implications for a Re-Examined Deposit Model." Minerals 8, no. 9 (September 13, 2018): 405. http://dx.doi.org/10.3390/min8090405.

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The Ernest Henry Iron-Oxide-Copper-Gold deposit is the largest known Cu-Au deposit in the Eastern Succession of the Proterozoic Mount Isa Inlier, NW Queensland. Cu-Au mineralization is hosted in a K-feldspar altered breccia, bounded by two major pre-mineralization shear zones. Previous research suggests that Cu-Au mineralization and the ore-bearing breccia formed simultaneously through an eruption style explosive/implosive event, facilitated by the mixing of fluids at ~1530 Ma. However, the preservation of a highly deformed, weakly mineralized, pre-mineralization feature (termed the Inter-lens) within the orebody indicates that this model must be re-examined. The paragenesis of the Inter-lens is broadly consistent with previous studies on the deposit, and consists of albitization; an apatite-calcite-quartz-garnet assemblage; biotite-magnetite ± garnet alteration; K-feldspar ± hornblende alteration; Cu-Au mineralization and post-mineralization alteration and veining. Apatite from the paragenetically early apatite-calcite-quartz-garnet assemblage produce U–Pb ages of 1584 ± 22 Ma and 1587 ± 22 Ma, suggesting that the formation of apatite, and the maximum age of the Inter-lens is synchronous with D2 deformation of the Isan Orogeny and regional peak-metamorphic conditions. Apatite rare earth element-depletion trends display: (1) a depletion in rare earth elements evenly, corresponding with an enrichment in arsenic and (2) a selective light rare earth element depletion. Exposure to an acidic NaCl and/or CaCl2-rich sedimentary-derived fluid is responsible for the selective light rare earth element-depletion trend, while the exposure to a neutral to alkaline S, Na-, and/or Ca-rich magmatic fluid resulted in the depletion of rare earth elements in apatite evenly, while producing an enrichment in arsenic. We suggest the deposit experienced at least two hydrothermal events, with the first event related to peak-metamorphism (~1585 Ma) and a subsequent event related to the emplacement of the nearby (~1530 Ma) Williams–Naraku Batholiths. Brecciation resulted from competency contrasts between ductile metasedimentary rocks of the Inter-lens and surrounding shear zones against the brittle metavolcanic rocks that comprise the ore-bearing breccia, providing permeable pathways for the subsequent ore-bearing fluids.

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31

Draper, J. "GEORGINA BASIN—AN EARLY PALAEOZOIC CARBONATE PETROLEUM SYSTEM IN QUEENSLAND." APPEA Journal 47, no. 1 (2007): 107. http://dx.doi.org/10.1071/aj06006.

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Queensland contains a number of carbonate-bearing basins which are under-explored for petroleum, but contain the elements of potentially economic petroleum systems. The oldest such basin is the Neoproterozoic to Ordovician Georgina Basin which straddles the Queensland-Northern Territory border and is traversed by the Ballera to Mount Isa gas pipeline.The basin developed across several major crustal blocks resulting in regional variations in deposition and deformation. Thick Neoproterozoic rocks of the Centralian Superbasin form the base of the sequence in apparently fault-bounded, extensional sub-basins. These rocks are generally tight and source rocks are unknown. The Cambrian to Ordovician rocks have the best petroleum potential with the most prospective part of the basin being the Toko Syncline. The Burke River Structural Belt is less prospective, but is worthy of further exploration. Basin fill consists of Cambrian and Early Ordovician rocks which are dominantly carbonates, with both limestones and dolostones present. In the Early to Middle Ordovician, the rocks became predominantly siliciclastic.The main phase of deformation affecting the Georgina Basin occurred in the Devonian as part of the Alice Springs Orogeny. The Toomba Fault, which forms the western boundary of the asymmetric Toko Syncline, is a thrust fault with up to 6.5 km of uplift. The angle of thrusting is between less than 40 degrees and up to 70 degrees. Rich, marine source rocks of Middle Cambrian age in the Toko Syncline are mature for oil except in the deepest part of the syncline where they are mature for dry gas. The deeper part of the Toko Syncline may be gas saturated.Potential hydrocarbon targets include large folds associated with fault rollovers, stratigraphic traps and faultbounded traps. Vugular, secondary porosity in dolostones offers the best chance for commercial reservoirs within the Ninmaroo and Kelly Creek formations and Thorntonia Limestone. There are also oolitic carbonates which may have good primary porosity, as well as interbedded sandstones in the carbonates with preserved porosity. Structurally controlled hydrothermal dolomite facies represent potential reservoirs. The dominantly siliciclastic Ordovician sequence is water flushed. Fracture porosity is another possibility (cf. the Palm Valley gas field in the Amadeus Basin). As the deeper part of the Toko Syncline appears to be gas saturated, there may be potential for basin-centred gas. Fine-grained carbonates and shales provide excellent seals. There has not been a valid structural test; although AOD Ethabuka–1 flowed 7,000 m3/d of dry gas, the well was abandoned short of the target depth.

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32

Sayab, Mohammad. "Tectonic significance of structural successions preserved within low-strain pods: Implications for thin- to thick-skinned tectonics vs. multiple near-orthogonal folding events in the Palaeo-Mesoproterozoic Mount Isa Inlier (NE Australia)." Precambrian Research 175, no. 1-4 (December 2009): 169–86. http://dx.doi.org/10.1016/j.precamres.2009.09.007.

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33

Cave, Bradley, Richard Lilly, and Wei Hong. "The Effect of Co-Crystallising Sulphides and Precipitation Mechanisms on Sphalerite Geochemistry: A Case Study from the Hilton Zn-Pb (Ag) Deposit, Australia." Minerals 10, no. 9 (September 9, 2020): 797. http://dx.doi.org/10.3390/min10090797.

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High-tech metals including Ge, Ga and In are often sourced as by-products from a range of ore minerals, including sphalerite from Zn-Pb deposits. The Hilton Zn-Pb (Ag) deposit in the Mount Isa Inlier, Queensland, contains six textural varieties of sphalerite that have formed through a diverse range of processes with variable co-crystallising sulphides. This textural complexity provides a unique opportunity to examine the effects of co-crystallising sulphides and chemical remobilisation on the trace element geochemistry of sphalerite. Early sphalerite (sph-1) is stratabound and coeval with pyrrhotite, pyrite and galena. Disseminated sphalerite (sph-2) occurs as isolated fine-grained laths rarely associated with co-crystallising sulphides and represents an alteration selvage accompanying the precipitation of early stratabound sphalerite (sph-1). Sphalerite (sph-3) occurs in early ferroan-dolomite veins and formed from the chemical remobilisation of stratabound sphalerite (sph-1) during brittle fracturing and interstitial fluid flow. This generation of veins terminate at the interface, and occurs within clasts of the paragenetically later sphalerite-dominated breccias (sph-4). Regions of high-grade Cu (>2%) mineralisation contain a late generation of sphalerite (sph-5), which formed from the recrystallisation of breccia-type sphalerite (sph-4) during the infiltration of a paragenetically late Cu- and Pb-rich fluid. Late ferroan-dolomite veins crosscut all previous stages of mineralisation and also contain chemically remobilised sphalerite (sph-6). Major and trace elements including Fe, Co, In, Sn, Sb, Ag and Tl are depleted in sphalerite associated with abundant co-crystallised neighbouring sulphides (e.g., pyrite, pyrrhotite, galena and chalcopyrite) relative to sphalerite associated with minor to no co-crystallising sulphides. This depletion is attributed to the incorporation of the trace elements into the competing sulphide minerals. Chemically remobilised sphalerite is enriched in Zn, Cd, Ge, Ga and Sn, and depleted in Fe, Tl, Co, Bi and occasionally Ag, Sb and Mn relative to the primary minerals. This is attributed to the higher mobility of Zn, Ge, Ga and Sn relative to Fe and Co during the chemical remobilisation process, coupled with the effect of co-crystallising with galena and ferroan-dolomite. Results from this study indicate that the consideration of co-crystallising sulphides and post-depositional processes are important in understanding the trace element composition of sphalerite on both a microscopic and deposit-scale, and has implications for a range of Zn-Pb deposits worldwide.

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34

Scott, K. M. "Dolomite compositions as a guide to epigenetic copper mineralization, Mount Isa Inlier, NW Queensland." Mineralium Deposita 24, no. 1 (January 1989). http://dx.doi.org/10.1007/bf00206718.

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