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.
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 Directory of Geoscience Departments 2015 written by Carolyn Wilson and published by American Geosciences Inst. This book was released on 2015-02-27 with total page 2140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Directory of Geoscience Departments 50th Edition is the most comprehensive directory and source of information about geosciences departments and researchers available. It is an invaluable resource for individuals working in the geosciences or must identify or work with specialists on the issues of Earth, Environmental, and related sciences and engineering fields. The Directory of Geoscience Departments 50th Edition provides a state/country-sorted listing of nearly 2300 geoscience departments, research departments, institutes, and their faculty and staff. Information on contact information for departments and individuals is provided, as well as details on department enrollments, faculty specialties, and the date and source of faculty and staff's highest degree. New in the 50th edition: Listing of all US and Canadian geoscience theses and dissertations accepted in 2012 that have been reported to GeoRef Information Services, as well as a listing of faculty by their research specialty.
Download or read book CIM Bulletin written by Canadian Institute of Mining and Metallurgy and published by . This book was released on 1997 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CIM Bulletin written by Canadian Institute of Mining, Metallurgy and Petroleum and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physical Volcanology and Hydrothermal Alteration Associated with Late Caldera Volcanic and Volcaniclastic Rocks and Volcanogenic Massive Sulfide Deposits in the Sturgeon Lake Region of Northwestern Ontario Canada written by George J. Hudak and published by . This book was released on 1996 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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.
Download or read book Mass Changes in Hydrothermal Alteration Zones Associated with VMS Deposits Off the Noranda Area written by T. J. Barrett and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physical Volcanology and Hydrothermal Alteration Associated with the F group Archean Volcanogenic Massive Sulfide Deposit Sturgeon Lake Northwestern Ontario written by George J. Hudak and published by . This book was released on 1989 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Volcanic associated Massive Sulfide Deposits Processes and Examples in Modern and Ancient Settings written by C.T. Barrie and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Altered Volcanic Rocks written by Cathryn Gifkins and published by CODES-University of Tasmania. This book was released on 2005-01-01 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about the processes and products of alteration in submarine volcanic successions. Its emphasis is on hydrothermal alteration associated with volcanic hosted massive sulfide deposits.
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:
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:
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:
Download or read book Volcanogenic Massive Sulfide Occurrence Model written by U. S. Department U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-04-28 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volcanogenic massive sulfide 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.
Download or read book Volcanic associated massive sulfide deposits written by C. Tucker Barrie and published by . This book was released on 1997 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
