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Geochemical And Isotopic Characteristics Of Alteration Zones In Highly Metamorphosed Volcanogenic Massive Sulfide Deposits And Their Potential Application To Mineral Exploration Microform
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Author :Sylvia Maria de Araujo Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612189867 Total Pages : pages Book Rating :4.1/5 (898 download)
Book Synopsis Geochemical and Isotopic Characteristics of Alteration Zones in Highly Metamorphosed Volcanogenic Massive Sulfide Deposits and Their Potential Application to Mineral Exploration [microform] by : Sylvia Maria de Araujo
Download or read book Geochemical and Isotopic Characteristics of Alteration Zones in Highly Metamorphosed Volcanogenic Massive Sulfide Deposits and Their Potential Application to Mineral Exploration [microform] written by Sylvia Maria de Araujo and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The metamorphosed alteration zone associated with the Bruce Precambrian volcanogenic massive sulfide deposit, Yavapai County, Arizona by : Peter Brennan Larson
Download or read book The metamorphosed alteration zone associated with the Bruce Precambrian volcanogenic massive sulfide deposit, Yavapai County, Arizona written by Peter Brennan Larson and published by . This book was released on 1976 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Altered Volcanic Rocks by : Cathryn Gifkins
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.
Book Synopsis Volcanic Environments and Massive Sulfide Deposits by : June Pongratz
Download or read book Volcanic Environments and Massive Sulfide Deposits written by June Pongratz and published by CODES-University of Tasmania. This book was released on 2000 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Trace and Major Element Geochemistry of the Gray Eagle Volcanogenic Massive Sulfide Deposit, Siskiyou County, California by : Robert L. Gronewold
Download or read book Trace and Major Element Geochemistry of the Gray Eagle Volcanogenic Massive Sulfide Deposit, Siskiyou County, California written by Robert L. Gronewold and published by . This book was released on 1983 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanic-associated Massive Sulfide Deposits: Processes and Examples in Modern and Ancient Settings by : C.T. Barrie
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:
Book Synopsis Geochemical and Sulfur-isotopic Signatures of Volcanogenic Massive Sulfide Deposits on Prince of Wales Island and Vicinity, Southeastern Alaska by :
Download or read book Geochemical and Sulfur-isotopic Signatures of Volcanogenic Massive Sulfide Deposits on Prince of Wales Island and Vicinity, Southeastern Alaska written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanogenic massive sulfide deposit density by :
Download or read book Volcanogenic massive sulfide deposit density written by and published by DIANE Publishing. This book was released on with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mineralogy and Stable Isotope Geochemistry of the Devonian Iron Mountain Massive Sulfide Deposit, Shasta County, California by : Bernard Carl South
Download or read book Mineralogy and Stable Isotope Geochemistry of the Devonian Iron Mountain Massive Sulfide Deposit, Shasta County, California written by Bernard Carl South and published by . This book was released on 1985 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Project 94E07 written by and published by . This book was released on 1998 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Author :U. S. Department U.S. Department of the Interior Publisher :CreateSpace ISBN 13 :9781497550049 Total Pages :360 pages Book Rating :4.5/5 (5 download)
Book Synopsis Volcanogenic Massive Sulfide Occurrence Model by : U. S. Department U.S. Department of the Interior
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.
Book Synopsis Lithogeochemical Features Associated with Volcanogenic Massive Sulphide Mineralization in the Sturgeon Lake Area of Ontario, Canada by :
Download or read book Lithogeochemical Features Associated with Volcanogenic Massive Sulphide Mineralization in the Sturgeon Lake Area of Ontario, Canada written by and published by . This book was released on 1981 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Volcanostratigraphic Controls on the Occurrence of Volcanogenic Massive Sulfide (VMS) Deposits and Hydrothermal Sub-seafloor Epidosite Alteration Zones in the Semail Ophiolite, Oman by :
Download or read book Volcanostratigraphic Controls on the Occurrence of Volcanogenic Massive Sulfide (VMS) Deposits and Hydrothermal Sub-seafloor Epidosite Alteration Zones in the Semail Ophiolite, Oman written by and published by . This book was released on 2014 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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