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Rambler Rhyolite

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Rambler rhyolite and sulfide mineralization at the 1806 zone. (a) Altered and deformed Rambler rhyolite with green mica (white arrows). (b) Sharp contact between clast-bearing rhyolitic lapilli tuff to massive sulfide lens. (c) Brecciated pyrite-sphalerite stringer around subrounded, silicified clasts in quartz eye-bearing, rhyolitic lapilli tuff. (d) Stringer sulfides of pyrite-chalcopyrite-sphalerite composition with visible electrum (El; white arrow). (e) Massive pyrite-chalcopyrite sulfide. (f) Silicified horizon with ghost clasts in assumed lapilli tuff and with discordant pyrite-chalcopyrite sulfide stringers. (g) Massive pyrite-chalcopyrite sulfides with sphalerite bands and relict rhyolite clasts with green mica alteration (white arrow). (h) Massive sulfide breccia with coarse, subangular rhyolite clasts in chalcopyrite-pyrrhotite-pyrite matrix on contact with mafic dike. See text for details.

Rambler rhyolite and sulfide mineralization at the 1806 zone. (a) Altered a... Available to Purchase

Published: 01 September 2014
Fig. 6 Rambler rhyolite and sulfide mineralization at the 1806 zone. (a) Altered and deformed Rambler rhyolite with green mica (white arrows). (b) Sharp contact between clast-bearing rhyolitic lapilli tuff to massive sulfide lens. (c) Brecciated pyrite-sphalerite stringer around subrounded
Journal Article

Volcanic and Structural Reconstruction of the Deformed and Metamorphosed Ming Volcanogenic Massive Sulfide Deposit, Canada: Implications for Ore Zone Geometry and Metal Distribution Available to Purchase

Jean-Luc Pilote, Stephen J. Piercey, Patrick Mercier-Langevin
Journal: Economic Geology
Published: 01 September 2017
Economic Geology (2017) 112 (6): 1305–1332.
DOI: https://doi.org/10.5382/econgeo.2017.4511
... is hosted in a NE-dipping volcanic succession (~487 Ma Rambler Rhyolite formation) composed of rhyodacitic to rhyolitic volcanic and volcaniclastic rocks that form the uppermost part of the Pacquet ophiolite complex. The deposit consists of four elongated, stratiform semimassive to massive sulfide lenses...
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View PDF for article title, Volcanic and Structural Reconstruction of the Deformed and Metamorphosed Ming Volcanogenic Massive Sulfide Deposit, Canada: Implications for Ore Zone Geometry and Metal Distribution
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Journal Article

Evidence for Syngenetic Precious Metal Enrichment in an Appalachian Volcanogenic Massive Sulfide System: The 1806 Zone, Ming Mine, Newfoundland, Canada Available to Purchase

Stefanie M. Brueckner, Stephen J. Piercey, Paul J. Sylvester, Stephanie Maloney, Larry Pilgrim
Journal: Economic Geology
Published: 01 September 2014
Economic Geology (2014) 109 (6): 1611–1642.
DOI: https://doi.org/10.2113/econgeo.109.6.1611
...Fig. 6 Rambler rhyolite and sulfide mineralization at the 1806 zone. (a) Altered and deformed Rambler rhyolite with green mica (white arrows). (b) Sharp contact between clast-bearing rhyolitic lapilli tuff to massive sulfide lens. (c) Brecciated pyrite-sphalerite stringer around subrounded...
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View PDF for article title, Evidence for Syngenetic Precious Metal Enrichment in an Appalachian Volcanogenic Massive Sulfide System: The 1806 Zone, Ming Mine, Newfoundland, Canada
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Schematic block diagrams showing the interpreted evolution of the Ming deposit host successions. A. Collapse of the Rambler Rhyolite and eruption of nested rhyolitic domes and volcaniclastic rocks. B. Upflow of metal-rich hydrothermal fluids forming the Lower Footwall zone and semimassive to massive sulfide lenses and associated alteration assemblages. C. Eruption of the quartz-megacrystic rhyolite and equivalent tuff beds along the reactivated first-order synvolcanic fault, forming the upper sulfide lenses in the Ming South (and North?) zone. D. Deposition of the magnetite-rich siltstone, crosscut by mafic to intermediate sills/dikes, possible feeders to the Snooks Arm Group volcanic and volcaniclastic rocks.

Schematic block diagrams showing the interpreted evolution of the Ming depo... Available to Purchase

Published: 01 September 2017
Fig. 20. Schematic block diagrams showing the interpreted evolution of the Ming deposit host successions. A. Collapse of the Rambler Rhyolite and eruption of nested rhyolitic domes and volcaniclastic rocks. B. Upflow of metal-rich hydrothermal fluids forming the Lower Footwall zone
Image
Geologic map of the study area, Baie Verte Peninsula, with Ming VMS orebodies projected to surface (also in the inset) and shown in light red and light green (Lower Footwall zone). Datum is UTM 21N NAD 83. Map compiled and modified from Tuach and Kennedy (1978), Hibbard (1983), Castonguay et al. (2009), Pilgrim (2009), and Skulski et al. (2010). The U-Pb zircon (Zrn) age of the Rambler Rhyolite formation is from Skulski et al. (2015).

Geologic map of the study area, Baie Verte Peninsula, with Ming VMS orebodi... Available to Purchase

Published: 01 September 2017
) , Castonguay et al. (2009) , Pilgrim (2009) , and Skulski et al. (2010) . The U-Pb zircon (Zrn) age of the Rambler Rhyolite formation is from Skulski et al. (2015) .
Image
Stereographic projections (Wulff lower hemisphere) of fabrics at the Ming deposit. A. Dominant foliations related to different deformation events. Contours represent the density distribution of poles to S2 as interpreted by previous studies in the Rambler Rhyolite formation (S. Castonguay, unpub. data, 2016). B. Linear and intersecting features related to different deformation events. C. Deformation of primary stratigraphic contacts (S0). D. Density distribution of poles to sulfide stringers in the Lower Footwall zone (LFZ) in relationship to S1, S2, and S3.

Stereographic projections (Wulff lower hemisphere) of fabrics at the Ming d... Available to Purchase

Published: 01 September 2017
Fig. 16. Stereographic projections (Wulff lower hemisphere) of fabrics at the Ming deposit. A. Dominant foliations related to different deformation events. Contours represent the density distribution of poles to S 2 as interpreted by previous studies in the Rambler Rhyolite formation (S
Image
Underground map from the 720 level (up-plunge portion) of the 1806 zone (Fig. 3). Mapped wall (top: first half, 0–9.75 m; bottom: second half, 9.75–21 m) is a cross section perpendicular to the NE-trending sulfide lens and shows the relationships between the massive sulfide lens (black) and the different rock types (Rambler rhyolite, mafic dike, silicified cap horizon). Hypothetical drill profiles are shown for mapped wall (top: A-A′ and B-B′, bottom: A′-A″) to illustrate variations in lithology, alteration, and sulfide mineralogy; see text for details. Abbreviations: Bio = biotite, Carb = carbonate, Ccp = chalcopyrite, Chl = chlorite, Gn = galena, Po = pyrrhotite, Py = pyrite, Qtz = quartz, Serc = sericite, Sp = sphalerite, Ten-Tet = tennantite-tetrahedrite.

Underground map from the 720 level (up-plunge portion) of the 1806 zone ( F... Available to Purchase

Published: 01 September 2014
) and the different rock types (Rambler rhyolite, mafic dike, silicified cap horizon). Hypothetical drill profiles are shown for mapped wall (top: A-A′ and B-B′, bottom: A′-A″) to illustrate variations in lithology, alteration, and sulfide mineralogy; see text for details. Abbreviations: Bio = biotite, Carb
Journal Article

Petrochemistry, hydrothermal alteration, mineralogy, and sulfur isotope geochemistry of the Turgeon Cu–Zn volcanogenic massive sulfide deposit, northern New Brunswick, Canada Available to Purchase

Erik Lalonde, Georges Beaudoin
Published: 21 March 2015
Canadian Journal of Earth Sciences (2015) 52 (4): 215–234.
DOI: https://doi.org/10.1139/cjes-2014-0093
... indicates that the host rocks are primarily tholeiitic basalts and andesites that have signatures between that of mid-ocean ridge basalt and island-arc tholeiite. The hanging wall rhyolite plots as an ocean ridge rhyolite and is geochemically similar to VMS-bearing FIIIa-type rhyolites. Hydrothermal...
View PDF for article title, Petrochemistry, hydrothermal alteration, mineralogy, and sulfur isotope geochemistry of the Turgeon Cu–Zn volcanogenic massive sulfide deposit, northern New Brunswick, Canada
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Journal Article

Resolving the Relative Timing of Au Enrichment in Volcanogenic Massive Sulfide Deposits Using Scanning Electron Microscopy-Mineral Liberation Analyzer: Empirical Evidence from the Ming Deposit, Newfoundland, Canada Available to Purchase

Jean-Luc Pilote, Stephen J. Piercey, Stefanie M. Brueckner, David Grant
Journal: Economic Geology
Published: 01 September 2016
Economic Geology (2016) 111 (6): 1495–1508.
DOI: https://doi.org/10.2113/econgeo.111.6.1495
... of the informally named Rambler Rhyolite formation, Baie Verte Peninsula, Newfoundland ( Fig. 1 ; Hibbard, 1983 ; Skulski et al., 2010 ). The Rambler Rhyolite formation forms the upper part of the Cambro-Ordovician Pacquet Complex, which is a partial ophiolite sequence ( Hibbard, 1983 ) of the Baie Verte oceanic...
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View PDF for article title, Resolving the Relative Timing of Au Enrichment in Volcanogenic Massive Sulfide Deposits Using Scanning Electron Microscopy-Mineral Liberation Analyzer: Empirical Evidence from the Ming Deposit, Newfoundland, Canada
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Journal Article

Volcanogenic massive sulfide (VMS) deposits of the Dunnage Zone of the Newfoundland Appalachians: setting, styles, key advances, and future research Open Access

Stephen J. Piercey, John G. Hinchey, Gregory W. Sparkes
Published: 30 May 2023
Canadian Journal of Earth Sciences (2023) 60 (8): 1104–1142.
DOI: https://doi.org/10.1139/cjes-2022-0148
.... The Cu–Au deposits of the Rambler-Ming district are within a bimodal mafic sequence composed of boninitic to arc tholeiitic rocks of the Mount Misery Formation, which are overlain by dacitic to rhyolitic rocks of the Rambler Rhyolite formation that hosts the Ming, Rambler, and Rambler East deposits (Figs...
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View PDF for article title, Volcanogenic massive sulfide (VMS) deposits of the Dunnage Zone of the Newfoundland Appalachians: setting, styles, key advances, and future research
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Model for the genesis of incompatible element depleted rhyolites associated with Au-rich VMS deposits in the Rambler-Ming district (modified after Pilote and Piercey 2018). Slab melts would have had high fO2 and been SO4-rich and H2S-undersaturated. During transition towards the upper crust, these melts would have been able to fractionate and in the absence of H2S, Au, and Cu (+ other metals) would behave incompatibly and increase in concentration. Their sulfide-undersaturated nature would have allowed for dissolution of any sulfides present in the mantle, further increasing the Cu–Au–Zn content of the melts (inset (A)). These magmas could then through degassing give rise to magmatic hydrothermal Cu–Au-epithermal suite elements near the surface leading to the observed Au-enrichment found in the Rambler-Ming VMS deposits (inset (B)). Abbreviations: AC, Advocate Complex; PRC, Point Rousse Complex; PC, Pacquet Complex; BCC, Betts Cove Complex; LBOT, Lushs Bight oceanic tract; IAT, island arc tholeiite.

Model for the genesis of incompatible element depleted rhyolites associated... Open Access

Published: 30 May 2023
Fig. 19. Model for the genesis of incompatible element depleted rhyolites associated with Au-rich VMS deposits in the Rambler-Ming district (modified after Pilote and Piercey 2018 ). Slab melts would have had high f O 2 and been SO 4 -rich and H 2 S-undersaturated. During transition towards
Journal Article

Discussion on ‘The sole of an ophiolite: the Ordovician Bay of Islands Complex, Newfoundland’ Journal , 170, 2013, pp. 715–722 Available to Purchase

Alexandre Zagorevski, Cees R. van Staal
Published: 28 April 2014
Journal of the Geological Society (2015) 172 (4): 519–521.
DOI: https://doi.org/10.1144/jgs2013-128
... of the Baie Verte oceanic tract Age (Ma) ε Nd Zircon inheritance (Ga) Cormacks Lake felsic tuff 489.3 ± 5.6 1.9–3.4 n.d. Cape Ray granodiorite 488 ± 3 −4.5 1.35 and older Rambler Rhyolite c . 487 – 1.0–2.6 Cormacks Lake tonalite 483.1 ± 1.4 0.8–2.2 n.d. Catchers...
View PDF for article title, Discussion on ‘The sole of an ophiolite: the Ordovician Bay of Islands Complex, Newfoundland’ Journal , 170, 2013, pp. 715–722
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An overview of petrochemistry in the regional exploration for volcanogenic massive sulphide (VMS) deposits Available to Purchase

S.J. Piercey
Published: 01 May 2010
Geochemistry: Exploration, Environment, Analysis (2010) 10 (2): 119–136.
DOI: https://doi.org/10.1144/1467-7873/09-221
... associated with VMS deposits in post-Archean mafic-dominated, juvenile substrates are associated with trace element depleted rhyolites with tholeiitic to boninite-like signatures and M-type and FIV affinities on discrimination plots. Using mafic or felsic rocks in isolation may lead to erroneous assignments...
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View PDF for article title, An overview of petrochemistry in the regional exploration for volcanogenic massive sulphide (VMS) deposits
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Dissolution-reprecipitation vs. solid-state diffusion in electrum: Examples from metamorphosed Au-bearing, volcanogenic massive sulfide (VMS) deposits Available to Purchase

Haiming Liu, Georges Beaudoin
Published: 01 October 2021
American Mineralogist (2021) 106 (10): 1654–1667.
DOI: https://doi.org/10.2138/am-2021-7674
.... 2016 ). The deposit is hosted in the upper part of the Rambler Rhyolite Formation ( Fig. 1 ), which is a folded, dome-shaped sequence of quartz-phyric rhyodacite, quartz-bearing intermediate to felsic tuff and tuff breccia formed during the Cambrian-Ordovician (ca. 487 Ma, Skulski et al. 2010...
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View PDF for article title, Dissolution-reprecipitation vs. solid-state diffusion in electrum: Examples from metamorphosed Au-bearing, volcanogenic massive sulfide (VMS) deposits
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High-Resolution Physical Properties, Geochemistry, and Alteration Mineralogy for the Host Rocks of the Archean Lemoine Auriferous Volcanogenic Massive Sulfide Deposit, Canada Available to Purchase

P.-S. Ross, A. Bourke, P. Mercier-Langevin, S. Lépine, F. Leclerc, A. Boulerice
Journal: Economic Geology
Published: 01 November 2016
Economic Geology (2016) 111 (7): 1561–1574.
DOI: https://doi.org/10.2113/econgeo.111.7.1561
.... Ugalde H. , 2011 , Structure of the Rambler rhyolite, Baie Verte Peninsula, Newfoundland: Inversions using UBC-GIF Grav3D and Mag3D : Journal of Applied Geophysics , v. 75 , p. 9 – 18 . Tavakoli S. Elming S.-A. Thunehed H. , 2012 , Geophysical modelling of the central...
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View PDF for article title, High-Resolution Physical Properties, Geochemistry, and Alteration Mineralogy for the Host Rocks of the Archean Lemoine Auriferous Volcanogenic Massive Sulfide Deposit, Canada
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PLATINUM-GROUP MINERALS FROM THE McBRATNEY PGE–Au PROSPECT IN THE FLIN FLON GREENSTONE BELT, MANITOBA, CANADA Available to Purchase

Gema Ribeiro Olivo, Peter Theyer
Published: 01 April 2004
The Canadian Mineralogist (2004) 42 (2): 667–681.
DOI: https://doi.org/10.2113/gscanmin.42.2.667
... type ( Syme et al. 1999 ). The Bear Lake Block is composed of juvenile arc-related rocks ( Syme et al . 1999 ) grouped in eleven units ( Bailes & Syme 1989 ), which from the base to the top are: Bear Lake basaltic andesite (3300 m thick), heterolithic breccia (150 m), Solodiuk Lake rhyolite (250...
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View PDF for article title, PLATINUM-GROUP MINERALS FROM THE McBRATNEY PGE–Au PROSPECT IN THE FLIN FLON GREENSTONE BELT, MANITOBA, CANADA
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Low δ 18 O zircon grains in the Neoarchean Rum Jungle Complex, northern Australia: An indicator of emergent continental crust Open Access

J.A. Hollis, M.J. Van Kranendonk, A.J. Cross, C.L. Kirkland, R.A. Armstrong, C.M. Allen
Journal: Lithosphere
Publisher: GSW
Published: 01 February 2014
Lithosphere (2014) 6 (1): 17–25.
DOI: https://doi.org/10.1130/L296.1
.... , 2000 , Formation of low-δ 18 O rhyolites after caldera collapse at Yellowstone, Wyoming, USA : Geology , v. 28 , no. 8 , p. 719 – 722 , doi:10.1130/0091-7613(2000)28<719:FOLRAC>2.0.CO;2 . Bindeman I.N. Valley J.W. , 2001 , Low-δ 18 O rhyolites from Yellowstone: Magmatic...
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View PDF for article title, Low δ 18 O zircon grains in the Neoarchean Rum Jungle Complex, northern Australia: An indicator of emergent continental crust
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Analysis of petrophysical properties of rocks from the Bathurst Mining Camp: Constraints on gravity and magnetic modeling Available to Purchase

Peter Tschirhart, Bill Morris
Journal: Interpretation
Published: 16 October 2014
Interpretation (2014) 2 (4): SJ133–SJ150.
DOI: https://doi.org/10.1190/INT-2014-0107.1
... of physical properties in mineral exploration: The exploration site measurement : The Leading Edge , 31 , 330 – 337 , doi: 10.1190/1.3694901 . 1070-485X Spicer B. Morris B. Ugalde H. , 2011 , Structure of the Rambler Rhyolite, Baie Verte Peninsula, Newfoundland: Inversions using UBC...
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View PDF for article title, Analysis of petrophysical properties of rocks from the Bathurst Mining Camp: Constraints on gravity and magnetic modeling
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Structural and Stratigraphic Controls on Magmatic, Volcanogenic, and Shear Zone-Hosted Mineralization in the Chapais-Chibougamau Mining Camp, Northeastern Abitibi, Canada(,) Available to Purchase

François Leclerc, Lyal B. Harris, Jean H. Bédard, Otto van Breemen, Normand Goulet
Journal: Economic Geology
Published: 01 August 2012
Economic Geology (2012) 107 (5): 963–989.
DOI: https://doi.org/10.2113/econgeo.107.5.963
... comprises the Obatogamau Formation (tholeiitic mafic volcanic rocks) and the Waconichi Formation, which is subdivided into five members: Lemoine, Scott, Portage, Queylus, and Allard ( Leclerc et al., 2011b ). The Lemoine and Scott Members consist predominantly of porphyritic rhyolites, dacites...
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View PDF for article title, Structural and Stratigraphic Controls on Magmatic, Volcanogenic, and Shear Zone-Hosted Mineralization in the Chapais-Chibougamau Mining Camp, Northeastern Abitibi, Canada(,)
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Unconformity surface architecture of the northeast Thelon Basin, Nunavut, derived from integration of magnetic source depth estimates Available to Purchase

Victoria Tschirhart, William A. Morris, Charles W. Jefferson
Journal: Interpretation
Published: 15 October 2014
Interpretation (2014) 2 (4): SJ117–SJ132.
DOI: https://doi.org/10.1190/INT-2014-0001.1
... , Magnetic interpretation in three dimensions using Euler deconvolution : Geophysics , 55 , 80 – 91 , doi: 10.1190/1.1442774 . GPYSA7 0016-8033 Spicer B. Morris B. Ugalde H. , 2011 , Structure of the Rambler rhyolite, Baie Verte Peninsula, Newfoundland: Inversions using UBC-GIF Grav...
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View PDF for article title, Unconformity surface architecture of the northeast Thelon Basin, Nunavut, derived from integration of magnetic source depth estimates
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