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Hydrothermal Alteration And Lithogeochemistry Of The Boundary Volcanogenic Massive Sulfide Vms Deposit Central Newfoundland Canada
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Book Synopsis Hydrothermal Alteration and Lithogeochemistry of the Boundary Volcanogenic Massive Sulfide (VMS) Deposit, Central Newfoundland, Canada by : Michael Buschette
Download or read book Hydrothermal Alteration and Lithogeochemistry of the Boundary Volcanogenic Massive Sulfide (VMS) Deposit, Central Newfoundland, Canada written by Michael Buschette and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Boundary volcanogenic massive sulfide (VMS) deposit (0.45 Mt @ 3.4% Cu, 4.0% Zn, 1.0 % Pb, 34 g/t Ag) is located in the Tally Pond group (~510 Ma), central Newfoundland, Canada. The deposit is hosted by rhyolitic rocks that are interpreted to have formed within a rifted continental arc on the leading edge of Ganderia. Mineralization consists of massive pyrite, chalcopyrite, and sphalerite lenses. The basal portion of these lenses contain lapilli tuff clasts indicative of replacement style mineralization. Three hydrothermal alteration assemblages are recognized at Boundary: quartz-sericite, chlorite-sericite, and intense chlorite. Lithogeochemical data are useful in identifying key element associations and alteration assemblages. Short-wave infrared (SWIR) spectroscopy data provide an effective vector for Zn mineralization and correlate with whole rock geochemistry. Lithogeochemical and SWIR data have been used to recreate a three-dimensional alteration model of the Boundary deposit that may be useful in further mineral exploration.
Book Synopsis Volcanic Stratigraphy and Hydrothermal Alteration Associated with the Duck Pond and Boundary Volcanogenic Massive Sulphide Deposits, Central Newfoundland by : Darin Walter Wagner
Download or read book Volcanic Stratigraphy and Hydrothermal Alteration Associated with the Duck Pond and Boundary Volcanogenic Massive Sulphide Deposits, Central Newfoundland written by Darin Walter Wagner and published by . This book was released on 1993 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanic and Hydrothermal Reconstruction of the Pilley's Island Volcanogenic Massive Sulfide District, Central Newfoundland by : Conor Patrick McKinley
Download or read book Volcanic and Hydrothermal Reconstruction of the Pilley's Island Volcanogenic Massive Sulfide District, Central Newfoundland written by Conor Patrick McKinley and published by . This book was released on 2013 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology, Structure, Petrogenesis, and Hydrothermal Alteration Reconstruction of the Ming Volcanogenic Massive Sulphide Deposit, Baie Verte Peninsula, Newfoundland, Canada by : Jean-Luc Pilote
Download or read book Geology, Structure, Petrogenesis, and Hydrothermal Alteration Reconstruction of the Ming Volcanogenic Massive Sulphide Deposit, Baie Verte Peninsula, Newfoundland, Canada written by Jean-Luc Pilote and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cambro-Ordovician Ming volcanogenic massive sulphide (VMS) deposit, Newfoundland Appalachians consists of stratiform and elongated semimassive to massive sulphide lenses (1807, 1806, Ming North, and Ming South zones) enriched in Cu, Zn, Ag, and Au that are underlain by a discordant Cu-rich stockwork zone (Lower Footwall zone). The host successions consist of highly fractionated FI-/FII-type rhyodacitic coherent to volcaniclastic rocks, which were deposited within a synvolcanic fault-controlled nested basin. The disposition of the sulphide lenses and the stockwork zone were controlled by the same synvolcanic faults. Deformation and greenschist metamorphic overprint have remobilized (≤20 m) less competent sulphide assemblages locally, but original stratigraphic relationships are preserved. Enclosed precious metal-rich sulphide clasts in a mafic polymictic breccia, which immediately overlies the deposit, support a syngenetic introduction of Au and associated tellurides at the Ming deposit. From regional geology and geochemical affinities, the felsic host successions are likely derived from direct partial melting of an island arc tholeiite at depths exceeding garnet stability zones (≥30 km). These types of magmas share many affinities to modern adakites formed in juvenile environments and may be more conducive to Au transport than previously thought. Ten distinct alteration assemblages are associated with the ore-forming hydrothermal fluids, grouped as chlorite-, sericite-, and (Mn-)carbonate-rich facies. The distribution and chemistry of the alteration assemblages are strongly controlled by the hosting lithologies. Most mass changes are restricted to the upper ~100 m of the stratigraphy, within the permeable volcaniclastic lithofacies. The Cu-rich stockwork is hosted by a chlorite-rich assemblage, reflecting high temperature fluids (≥300°C) that mixed with seawater at the coherent-fragmental interface, decreasing Cu solubility and resulting in the precipitation of chalcopyrite. Gold, Ag, sulfosalts and other magmatophile elements are enriched in sulphide zones that are immediately underlain by coherent rocks. The less diffusive potential of the coherent rocks may have increased the efficiency of metal precipitation in these zones and could explain the heterogeneity of metal grades at Ming. The paragenetic evolution indicates that the introduction of precious metals is spatially and temporally associated with the quartz-sericite-sulphides assemblage, which is considered to reflect the overprint of acidic and low temperature (≤250°C) fluids in the waning stage of the hydrothermal system.
Book Synopsis Mineral Deposits of Canada by : Wayne David Goodfellow
Download or read book Mineral Deposits of Canada written by Wayne David Goodfellow and published by . This book was released on 2007 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemostratigraphy and Alteration Geochemistry of the Lundberg and Engine House Volcanogenic Massive Sulfide Mineralization, Buchans, Central Newfoundland by : Gregory William Harry Van Hees
Download or read book Chemostratigraphy and Alteration Geochemistry of the Lundberg and Engine House Volcanogenic Massive Sulfide Mineralization, Buchans, Central Newfoundland written by Gregory William Harry Van Hees and published by . This book was released on 2012 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanic-associated Massive Sulfide Deposits by :
Download or read book Volcanic-associated Massive Sulfide Deposits written by and published by . This book was released on 2010 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Earth Sciences by :
Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 2016 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology, Alteration and Lithogeochemistry of the Hood Deposits, Nunavut, Canada by : Hannah Klara Mills
Download or read book Geology, Alteration and Lithogeochemistry of the Hood Deposits, Nunavut, Canada written by Hannah Klara Mills and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study concerns the Hood volcanogenic massive sulfide (VMS) deposits that are hosted by the ~2.68 Ga Amooga Booga volcanic belt in the northwestern Slave Craton, Nunavut, Canada. The deposits comprise a cluster of bimodal-mafic VMS Cu-Zn- Pb lenses and mineral occurrences. On the basis of crustally contaminated felsic and mafic rocks, the volcanism is interpreted to have occurred in a tectonic environment comparable to a modern continental marginal back-arc basin. Geochemical study of the Hood volcanic rocks indicates controls on felsic petrogenesis such as fractionation temperature and interaction with the sialic basement have important implications for mineral prospectivity. Evidence for subseafloor replacement style mineralization includes remnant host rock clasts within mineralized intervals and alteration in both the footwall and the hanging wall to mineralization. Vectors to mineralization at the Hood deposits include Na2O loss, Fe2O3, MgO and base metal gains and high principal component 1 scores proximal to mineralization.
Book Synopsis Lithofacies and Alteration of the Hurricane Zone, of the Boomerang Volcanogenic Massive Sulphide Deposit, Tulks Belt, Central Newfoundland, Canada by : Michelle English
Download or read book Lithofacies and Alteration of the Hurricane Zone, of the Boomerang Volcanogenic Massive Sulphide Deposit, Tulks Belt, Central Newfoundland, Canada written by Michelle English and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hurricane zone of the Boomerang volcanogenic massive sulphide (VMS) deposit is part of the VMShosting Cambro-Ordovician Tulks volcanic belt. The Hurricane zone is one of three lenses in the deposit and consists of a sub-horizontal (semi-)massive sulphide lens with combined resources of 55,100 tonnes @ 13.4% Zn, 7.0% Pb, 1.20% Cu, 159.0 g/t Ag, and 2.00 g/t Au. Mineralization is hosted in intermediate to felsic volcaniclastic rocks of the ca. 488 Ma Pats Pond Group (Victoria Lake supergroup) and consists of banded sphalerite, galena, chalcopyrite, and pyrite, which are interpreted to have formed below the seafloor within subseafloor sediments. Four alteration assemblages are identified: intense sericite-quartzpyrite, sericite-quartz-chlorite-pyrite, intense chlorite and chaotic carbonate. Whole-rock lithogeochemistry and short-wave infrared spectroscopy are useful in identifying key elements/element ratios and variations in white mica chemistry/mineralogy associated with each alteration assemblage and are useful vectors to mineralization.
Book Synopsis Scientific Investigations Report by : Sharon E. Kroening
Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Giant Kidd Creek Volcanogenic Massive Sulfide Deposit, Western Abitibi Subprovince, Canada by : Mark Donald Hannington
Download or read book The Giant Kidd Creek Volcanogenic Massive Sulfide Deposit, Western Abitibi Subprovince, Canada written by Mark Donald Hannington and published by . This book was released on 1999 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 4-D Framework of Continental Crust by : Robert D. Hatcher
Download or read book 4-D Framework of Continental Crust written by Robert D. Hatcher and published by Geological Society of America. This book was released on 2007 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book contains landmark papers on the processes of formation of continental crust from its beginnings in the Archean to modern processes, as well as discussions of several ancient and modern orogenic belts. The book is international in scope, with contributions from geoscientists dealing with crustal processes on five continents, and articles from more than 50 non-U.S. authors and co-authors."--Publisher's website.
Book Synopsis Hydrothermal Fe-Carbonate Alteration Associated with Volcanogenic Massive Sulfide (VMS) Deposits in Cycle IV of the Noranda Mining Camp, Rouyn-Noranda, Quebec by : Ryan Wilson
Download or read book Hydrothermal Fe-Carbonate Alteration Associated with Volcanogenic Massive Sulfide (VMS) Deposits in Cycle IV of the Noranda Mining Camp, Rouyn-Noranda, Quebec written by Ryan Wilson and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Massive sulfide deposits in the Noranda mining camp, northwestern Québec, are mainly associated with extensive footwall alteration defined by intense chloritization and sericitization. However, Fe-carbonate alteration also occurs in proximity to some deposits. To test the exploration significance of carbonate alteration in the camp, two areas of intense carbonate alteration were examined, around the small Delbridge deposit and near the new Pinkos occurrence in the Cyprus Rhyolite. Between 1969 and 1971, the Delbridge deposit produced 370,000 t of ore grading 9.6% Zn, 0.61% Cu, 110 g/t Ag, and 2.1 g/t Au. Recent drilling at the new Pinkos occurrence intersected 2.64 m of massive to semi-massive sulfides grading 8.1% Zn and 18.2 g/t Ag. Alteration mapping has shown that the distribution of Fe-carbonates can be used to identify vertically extensive zones of hydrothermal upflow at both properties. At Delbridge, intense Fe-carbonate alteration in brecciated rhyolite defines a pipe-like upflow zone that extends vertically for up to 300 m within the stratigraphic footwall of the massive sulfides and 100 m into the hanging wall. The location of known massive sulfide mineralization coincides with the intersection of the alteration pipe and a favorable horizon marked by the occurrence of fine-grained volcaniclastic rocks. At Pinkos, a similar zone of Fe-carbonate alteration occurs in outcrops of coherent rhyolite. Fe-carbonate alteration is most intensely developed along polygonal cooling fractures in massive rhyolite and decreases in intensity towards the centers of the columns. Fe-carbonate stringers and locally abundant matrix carbonate occur in fragmental rocks at the stratigraphic top of the coherent rhyolite flows and are most intense at the location of sulfide-bearing outcrops that mark the known mineralized horizon. Whereas Fe-carbonate alteration defines the central part of the hydrothermal upflow zones at both properties, disseminated pyrite occurs at the margins and is widespread outside the main upflow zones. This may indicate that Fe-carbonate in the main upflow zones formed at the expense of earlier disseminated sulfides. Replacement of pyrite by synvolcanic Fe-carbonate alteration at Delbridge and Pinkos can probably be attributed to a relatively high concentration of dissolved CO2, possibly of magmatic origin, in the main-stage ore-forming fluids.
Book Synopsis Volcanogenic Massive Sulfide Occurrence Model by : Wayne C. Shanks
Download or read book Volcanogenic Massive Sulfide Occurrence Model written by Wayne C. Shanks and published by . This book was released on 2012 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volcanogenic massive sulfide (VMS) deposits, also known as volcanic-hosted massive sulfide, volcanic-associated massive sulfide, or seafloor massive sulfide deposits, are important sources of copper, zinc, lead, gold, and silver (Cu, Zn, Pb, Au, and Ag). These deposits form at or near the seafloor where circulating hydrothermal fluids driven by magmatic heat are quenched through mixing with bottom waters or porewaters in near-seafloor lithologies. Massive sulfide lenses vary widely in shape and size and may be podlike or sheetlike. They are generally stratiform and may occur as multiple lenses. Volcanogenic massive sulfide deposits range in size from small pods of less than a ton (which are commonly scattered through prospective terrains) to supergiant accumulations like Rio Tinto (Spain), 1.5 Bt (billion metric tons); Kholodrina (Russia), 300 Mt (million metric tons); Windy Craggy (Canada), 300 Mt; Brunswick No. 12 (Canada), 230 Mt; and Ducktown (United States), 163 Mt (Galley and others, 2007). Volcanogenic massive sulfide deposits range in age from 3.55 Ga (billion years) to zero-age deposits that are actively forming in extensional settings on the seafloor, especially mid-ocean ridges, island arcs, and back-arc spreading basins (Shanks, 2001; Hannington and others, 2005). The widespread recognition of modern seafloor VMS deposits and associated hydrothermal vent fluids and vent fauna has been one of the most astonishing discoveries in the last 50 years, and seafloor exploration and scientific studies have contributed much to our understanding of ore-forming processes and the tectonic framework for VMS deposits in the marine environment. Massive ore in VMS deposits consists of>40 percent sulfides, usually pyrite, pyrrhotite, chalcopyrite, sphalerite, and galena; non-sulfide gangue typically consists of quartz, barite, anhydrite, iron (Fe) oxides, chlorite, sericite, talc, and their metamorphosed equivalents. Ore composition may be Pb-Zn-, Cu-Zn-, or Pb-Cu-Zn-dominated, and some deposits are zoned vertically and laterally. Many deposits have stringer or feeder zones beneath the massive zone that consist of crosscutting veins and veinlets of sulfides in a matrix of pervasively altered host rock and gangue. Alteration zonation in the host rocks surrounding the deposits are usually well-developed and include advanced argillic (kaolinite, alunite), argillic (illite, sericite), sericitic (sericite, quartz), chloritic (chlorite, quartz), and propylitic (carbonate, epidote, chlorite) types (Bonnet and Corriveau, 2007). An unusual feature of VMS deposits is the common association of stratiform "exhalative" deposits precipitated from hydrothermal fluids emanating into bottom waters. These deposits may extend well beyond the margins of massive sulfide and are typically composed of silica, iron, and manganese oxides, carbonates, sulfates, sulfides, and tourmaline.
Book Synopsis Hydrothermal Iron-Carbonate Alteration Associated with Volcanogenic Massive Sulfide (VMS) Deposits in Cycle IV of the Noranda Mining Camp, Rouyn-Noranda, Quebec by : Ryan Wilson
Download or read book Hydrothermal Iron-Carbonate Alteration Associated with Volcanogenic Massive Sulfide (VMS) Deposits in Cycle IV of the Noranda Mining Camp, Rouyn-Noranda, Quebec written by Ryan Wilson and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lyell written by Derek John Blundell and published by Geological Society of America. This book was released on 1998 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distinguished historians of science give an appraisal of Sir Charles Lyell's life and works, and his influence through his travels across Europe and North America. Leading geologists assess Lyell's subsequent influence on climatology, sedimentology, stratigraphy, coal geology, regional tectonics, volcanology and natural hazards. Modern geological research constructed upon Lyell's legacy illustrates its wealth, 200 years on from his birth.
