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Que River Footwall Dacite

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Journal Article
Journal: Economic Geology
Published: 01 May 1992
Economic Geology (1992) 87 (3): 650-666.
...John C. Waters; David B. Wallace Abstract The Hellyer and Que River high-grade polymetallic volcanic-hosted massive sulfide deposits of western Tasmania are hosted by a sequence of late Middle Cambrian subaqueous mafic to felsic volcanics and volcaniclastics known as the Que-Hellyer Volcanics...
Journal Article
Journal: Economic Geology
Published: 01 July 1988
Economic Geology (1988) 83 (4): 681-693.
...Ross R. Large; Peter J. McGoldrick; Ron F. Berry; Chris H. Young Abstract The Que River deposit in western Tasmania is a high-grade, gold-rich, Cambrian volcanogenic sulfide deposit, comprising two major subvertical ore lenses hosted by andesitic lavas and volcaniclastics of the Mount Read...
Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 1003-1035.
.... The deposit is hosted by the Que-Hellyer Volcanics, a sequence of late Middle Cambrian mafic to felsic coherent volcanics and polymict volcaniclastics. Hydrothermal alteration occurs in the regional footwall, immediate footwall, and hanging wall. Alteration in the regional footwall is confined to patchy...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 1037-1054.
... Volcanics; Corbett, 1992 ). The immediate host sequence is a mixed package of epiclastic mass-flow breccias, dacitic lava flows, andesitic and basaltic volcanics, tuffs, and minor sedimentary rocks. It lies above the Animal Creek Graywacke and below the Que-River Shale. F ig . 1. Location of Hellyer...
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Journal Article
Journal: Economic Geology
Published: 01 January 2008
Economic Geology (2008) 103 (1): 5-33.
..., 2001 ). The LREE enrichment in this suite overlaps the fields for Archean FII to FI rhyolites (Fig. 14A ) and the fields for the Phanerozoic rhyolites from the Mount Windsor, Kuroko, and Que River districts (Fig. 14B ). F ig . 11. A. Modified Zr/TiO 2 -Nb/Y diagram of Winchester and Floyd...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 913-938.
... are considered to have formed in moderate to relatively deep water environments (500–1,000+m). These deposits probably formed either on the sea floor (e.g., Hellyer, Que River) or by replacement of porous volcaniclastic units directly below the sea floor (e.g., Rosebery). The footwall alteration associated...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 1175-1200.
... and a dacite-dominated volcano-sedimentary sequence in the hanging wall. The sulfide deposit and the enclosing volcanic sequence were metamorphosed under upper greenschist conditions. A laterally continuous footwall alteration zone extends beneath the entire deposit (~3,000 m) and to a stratigraphic depth...
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Journal Article
Published: 01 March 2013
Bulletin de la Société Géologique de France (2013) 184 (3): 199-223.
... in slab break-off and is relayed by the oblique subduction of the Tarim the Athyn Tagh propagated northeastward beneath the Qilina Shan. Southward, the dextral Red River fault accommodated the southeastward extrusion of the Indochina block. During the Miocene, specifically, between 25 and 15 Ma...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 1073-1088.
.... Footwall alteration consists of intensely foliated to mylonitic variably sericite-quartz ± pyrite ± carbonate altered rhyolitic and dacitic volcaniclastic rocks, lavas, and sills of the Central Volcanic Complex and theYolande River sequence ( Fig 3 ). Minor (0.2–1 m) fuchsite-sericite altered mafic dikes...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 1055-1072.
... breccias, lavas, and dacitic intrusions known informally as the Mount Black volcanics ( Allen, 1994a ; Gifkins and Allen, 2001 ). Locally, a 0- to 50-m-thick package of stratified, felsic, crystal-pumice-lithic sandstones and siltstones occurs at the boundary between the footwall volcanics and hanging...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 1149-1173.
... obscure the detailed interpretation of volcanic facies in the footwall rocks. The hanging wall is composed of relatively unaltered, coherent flows or sills of feldspar porphyritic to aphyric dacite, and minor basaltic-andesite. Volcaniclastic sedimentary rocks of mixed dacitic-rhyolitic derivation...
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Journal Article
Published: 02 April 2000
Canadian Journal of Earth Sciences (2000) 37 (2-3): 359-383.
...Toby Rivers; David Corrigan Abstract A continental-margin magmatic arc is inferred to have existed on the southeastern (present coordinates) margin of Laurentia from Labrador to Texas from ∼1500–1230 Ma, with part of the arc subsequently being incorporated into the 1190–990 Ma collisional Grenville...
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Journal Article
Published: 20 December 2011
Canadian Journal of Earth Sciences (2012) 49 (1): 1-42.
...Toby Rivers Abstract This paper provides a re-interpretation of the crustal architecture of the Ottawan hinterland of the Grenville Province in light of published empirical and numerical models of orogenic collapse. It is now seen as a series of high-grade, mid-crustal core complexes from tens...
Journal Article
Journal: Economic Geology
Published: 01 March 2015
Economic Geology (2015) 110 (2): 445-468.
... ). The central Mount Read Volcanics, extending from Mount Darwin to the Cradle Mountain Link Road ( Fig. 1 ), hosts economically significant gold, silver, and base metal massive sulfide (VHMS) ore deposits at Hellyer, Fossey, Que River, Rosebery, Hercules, Henty, and Mount Lyell. These VHMS deposits are hosted...
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Journal Article
Journal: Economic Geology
Published: 01 January 2008
Economic Geology (2008) 103 (1): 161-183.
... lenses are located within footwall andesitic volcanic and volcaniclastic rocks that are pervasively altered to a quartz-pyrite-sericite assemblage, and immediately below a hanging-wall sequence consisting of at least two basaltic to basaltic-andesitic lava flows, each capped by autoclastic breccia...
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Journal Article
Journal: Economic Geology
Published: 01 June 2015
Economic Geology (2015) 110 (4): 943-982.
... and/or biotite and muscovite, with cordierite after quartz, and the fibrolite porphyroblasts increase in abundance stratigraphically downward. Both the dacite and rhyolite tuffs in the footwall are pervasively silicified, and contain variable (5 to 40 vol%) sericite (after feldspar and muscovite) and chlorite...
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Journal Article
Published: 09 September 2003
Canadian Journal of Earth Sciences (2003) 40 (8): 1137-1167.
... belts of the Mary River Group, and various younger plutonic rocks. The 3000–2800 Ma gneiss complex contains intrusions of orthogneiss, dated at 2780–2770 Ma. Intermediate–felsic volcanism in overlying greenstone belts occurred at 2740–2725 Ma and was accompanied and outlasted by calc-alkaline plutonism...
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Journal Article
Journal: Economic Geology
Published: 01 March 2005
Economic Geology (2005) 100 (2): 273-294.
... is 2,241 nm (intermediate Mg chlorite), whereas wavelengths in background samples average 2,247 nm (intermediate Fe chlorite). Similar changes are observed in footwall and hanging-wall andesites, with samples near the Battle mine containing muscovite to phengitic muscovite (average wavelength of the AlOH...
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Journal Article
Journal: Economic Geology
Published: 01 June 2007
Economic Geology (2007) 102 (4): 633-666.
... the interface with dacitic volcaniclastic rocks (Unit 5.1) located in the stratigraphic footwall. The volcanic sequence of the Bousquet Formation is overlain by wacke units of the Cadillac Group (Figs. 1 , 3 ). F ig . 2. Geology of the LaRonde Penna deposit level 146 (1,460 m below surface), showing...
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Journal Article
Published: 18 July 2016
Canadian Journal of Earth Sciences (2016) 53 (12): 1458-1475.
... a dominantly mafic metavolcanic stratigraphic footwall. The stratigraphic footwall is a Mississippian mafic metavolcanic sequence with a protolith age of approximately 340–330 Ma. The first U–Pb zircon constrained chronostratigraphy for the area places the deposit near, or at, the base of the host Late...
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