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Mount Isa Fault

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Journal Article
Journal: Economic Geology
Published: 01 February 1999
Economic Geology (1999) 94 (1): 23-36.
... systems capable of forming Mount Isa-style, late metamorphic, Cu ores. 40 Ar/ 39 Ar dating of hornblende, which is in broad accord with a published zircon date, suggests that the highgrade metamorphic rocks on the western side of the Mount Isa fault zone were not juxtaposed with the low-grade metamorphic...
Journal Article
Journal: Geology
Published: 01 April 2004
Geology (2004) 32 (4): 357-360.
... with a copper- rich oxidized fluid entering a brecciated contact zone from underlying metabasalts. We have performed numerical simulations to test whether the deposit may have formed by forced fluid convection driven by progressive displacement on the Mount Isa fault zone, indicated by an ∼200 °C offset...
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Journal Article
Journal: Economic Geology
Published: 01 July 1995
Economic Geology (1995) 90 (4): 705-730.
... and silica deposition stage at the Mount Isa mine.Mg chlorite-rutile alteration is restricted to metabasalts immediately below the copper deposit and the vicinity of the Mount Isa fault zone, where higher grade amphibolite facies metabasalts were upthrust against the greenschist facies metabasalts...
Series: Geological Society, London, Special Publications
Published: 01 January 2011
DOI: 10.1144/SP359.16
EISBN: 9781862396074
... that the rock units have been deposited, affected by early faults, then folded and affected by later faults (Figs 1 & 8 a–c). Folding ( F n ) is likely to be related to the peak metamorphic event that affected the whole Mount Isa inlier, D 2 (Fig. 8 a–c and domains 1 , 2 , 3 , 4 ). Fig. 9...
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Journal Article
Journal: Economic Geology
Published: 01 December 1991
Economic Geology (1991) 86 (8): 1602-1625.
... of the Mount Isa Valley and the rocks to the west of the mine is controlled by a series of north-south-striking high-angle reverse faults that slice through the Meerenurker thrust as it crosses the above-mentioned lateral ramp on the western edge of the large-scale duplex. Two of the faults, Mount Gordon...
Journal Article
Journal: Economic Geology
Published: 01 August 1993
Economic Geology (1993) 88 (5): 1135-1175.
... assemblages occur throughout the extensive regional domain and are also observed in undeformed parts of the more restricted Paroo fault domain. The Paroo fault-style of alteration is confined to the vicinity of major faults and fault zones such as the Mount Isa, Paroo, and Western faults. The contrasting...
Journal Article
Journal: Geology
Published: 01 January 2004
Geology (2004) 32 (1): e66.
...A.R. Wilde; K. Gessner The modeling presented by Matthäi et al. (2004) is based on the assumption that 8 km of vertical movement on the Mount Isa fault occurred contemporaneously with copper ore formation. A widely accepted view however, is that copper formed after the main, peak-metamorphic E...
Journal Article
Journal: Geology
Published: 01 January 2004
Geology (2004) 32 (1): e67.
... in a compressive setting is often the least permeable ( Evans et al., 1997 ). Therefore, the results by Bächler et al. (2003) on a highly permeable fault in an extensional setting do not pertain to the Mount Isa reverse fault. Wilde and Gessner also state that our model is based on an incorrect relative...
Journal Article
Journal: Economic Geology
Published: 01 July 1984
Economic Geology (1984) 79 (4): 601-637.
...W. G. Perkins Abstract Complex hydrothermal alteration system postdates deposition of the Mount Isa Group and the lead-zinc-silver orebodies. Silica dolomite results from differential progressive metasomatic alteration of the entire range of microfacies constituting the lead-zinc sequence. The main...
Journal Article
Journal: Economic Geology
Published: 01 September 2006
Economic Geology (2006) 101 (6): 1275-1292.
... that would have been most favorable for the formation of a Century-style orebody adjacent to the Termite Range fault. The Mount Isa-McArthur basin region is one of the best-documented lead-zinc-silver mineralized belts in the world. Recent research in this part of northern Australia has better...
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Journal Article
Journal: Economic Geology
Published: 01 September 2006
Economic Geology (2006) 101 (6): 1159-1188.
... and synore quartz and illite in the Zn deposits in the Lawn Hill platform, and (3) various alteration minerals from the Mount Isa Cu deposit. Collectively, this suggests that the quartz veins represent fluids that migrated along faults from the diagenetic aquifers during late diagenesis to form the low...
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Journal Article
Journal: Economic Geology
Published: 01 March 2011
Economic Geology (2011) 106 (2): 169-192.
...-gold (IOCG) deposits in the Selwyn-Mount Dore corridor of the Proterozoic Mount Isa inlier. Two distinct sodic-calcic alteration events that occurred prior to mineralization have been recognized. This suggests that sodic-calcic alteration may be a fundamental precursor to IOCG mineralization...
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Journal Article
Journal: Economic Geology
Published: 01 December 1998
Economic Geology (1998) 93 (8): 1406-1421.
...James Cannell; Garry J. Davidson Abstract Great Australia is a small Cu-Co deposit in the Eastern succession of the Mount Isa inlier, northern Queensland. It may be viewed as a carbonate-rich member of the globally distributed, oxide-dominated, Fe-Cu-Au + or - rare earth element (REE) + or - U...
Journal Article
Journal: Economic Geology
Published: 01 August 1994
Economic Geology (1994) 89 (5): 1031-1052.
... of syndeformational copper mineralization.Syntectonic Cu mineralization in the Hilton area highlights the roles of dilation related to displacement at fault intersections and to competency contrasts in the focusing of migrating metal-bearing fluids. Copper mineralization at Hilton and Mount Isa share a similar timing...
Journal Article
Journal: Economic Geology
Published: 01 February 1988
Economic Geology (1988) 83 (1): 69-85.
...T. H. Bell; W. G. Perkins; C. P. Swager Abstract Three major deformation events were responsible for the structural relationships in the Mount Isa mine where steeply west-dipping siliceous and dolomitic sediments of the Mount Isa Group, which host the Ag-Pb-Zn ores as well as the epigenetic Cu...
Journal Article
Journal: Economic Geology
Published: 01 December 1998
Economic Geology (1998) 93 (8): 1422-1434.
.... The second stage is characterized by a network of basement-cutting reverse and strike-slip faults that dissected the decollement. This overprinting system was linked to crustal thickening within the Mount Isa terrane.The refraction profile indicates the crust beneath the inlier is currently approximately 55...
Journal Article
Published: 21 March 2017
Journal of the Geological Society (2017) 174 (4): 773-786.
... limited disruption of post-rift Moondarra Siltstone (Gun Supersequence) by extensional faults compared with underlying older units in Calvert and Leichhardt superbasins. Host rocks (Urquhart Shale) to the Mount Isa and Hilton–George Fisher deposits are identified as a separate unit within the Calvert...
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