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A Geochemical Petrographic And Metallogenic Analysis Of Volcanogenic Sulphide Deposition Within The Connaigre Bay Group Hermitage Peninsula Southern Newfoundland Microform
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Author :Sears, William Alexander Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 : Total Pages :564 pages Book Rating :4.:/5 (456 download)
Book Synopsis A Geochemical, Petrographic, and Metallogenic Analysis of Volcanogenic Sulphide Deposition Within the Connaigre Bay Group, Hermitage Peninsula, Southern Newfoundland [microform] by : Sears, William Alexander
Download or read book A Geochemical, Petrographic, and Metallogenic Analysis of Volcanogenic Sulphide Deposition Within the Connaigre Bay Group, Hermitage Peninsula, Southern Newfoundland [microform] written by Sears, William Alexander and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1990 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Geochemical, Petrographic, and Metallogenic Analysis of Volcanogenic Sulphide Deposition Within the Connaigre Bay Group, Hermitage Peninsula, Southern Newfoundland by : William Alexander Sears
Download or read book A Geochemical, Petrographic, and Metallogenic Analysis of Volcanogenic Sulphide Deposition Within the Connaigre Bay Group, Hermitage Peninsula, Southern Newfoundland written by William Alexander Sears and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Geological, Geochemical and Structural Analysis of the Lower Ordovician Tulks Hill Cu-Zn-(Pb) Volcanogenic Massive Sulphide Deposit, Central Newfoundland, Canada by : Christopher Moreton
Download or read book A Geological, Geochemical and Structural Analysis of the Lower Ordovician Tulks Hill Cu-Zn-(Pb) Volcanogenic Massive Sulphide Deposit, Central Newfoundland, Canada written by Christopher Moreton and published by . This book was released on 1984 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geochemical and Petrographical Analysis of the Gold-rich Volcanogenic Massive Sulphide (VMS) Colchester Property, Springdale Peninsula, NL by : Richard E. Greenwood
Download or read book Geochemical and Petrographical Analysis of the Gold-rich Volcanogenic Massive Sulphide (VMS) Colchester Property, Springdale Peninsula, NL written by Richard E. Greenwood and published by . This book was released on 2004 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanic Stratigraphy, Petrology and Geochemistry of the Marystown Group; Burin Peninsula, Newfoundland by : S. J. (Sean James) O'Brien
Download or read book Volcanic Stratigraphy, Petrology and Geochemistry of the Marystown Group; Burin Peninsula, Newfoundland written by S. J. (Sean James) O'Brien and published by 1979.. This book was released on 1979 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanic-associated Massive Sulfide Deposits by : C. Tucker Barrie
Download or read book Volcanic-associated Massive Sulfide Deposits written by C. Tucker Barrie and published by . This book was released on 1999 with total page 430 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 A Comprehensive Geological, Petrological, and Geochemical Evaluation of the Voisey's Bay NI-CU-CO Sulfide Deposit by : Michelle Anne Huminicki
Download or read book A Comprehensive Geological, Petrological, and Geochemical Evaluation of the Voisey's Bay NI-CU-CO Sulfide Deposit written by Michelle Anne Huminicki and published by . This book was released on 2007 with total page 706 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 Base Metal Sulfide Deposits in Sedimentary and Volcanic Environments by : Guenther Friedrich
Download or read book Base Metal Sulfide Deposits in Sedimentary and Volcanic Environments written by Guenther Friedrich and published by Springer. This book was released on 2012-11-21 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on base metal sulfide deposits is among the oldest and best-documented subjects of economic geologists worldwide, c- sidering that copper was first mined about 3000 years ago on the island of Cyprus. During the past 10 years, after the exciting discovery of active sulfide formation on the modem ocean floor, a considerable flow of new ideas has stimulated and influenced the discussion of o- forming processes for copper-zinc-Iead sulfides in sedimentary and volcanic environments. The development of new genetic concepts consequently led to reinterpretation of some apparently well-est- lished formation models. This Proceedings Volume contains a collection of carefully selected papers on current research on the geology and metallogeny of base metal sulfide deposits presented as oral or poster contri- tions at the DMG (Deutsche Mineralogische Gesellschaft) - GDMB (Gesellschaft Deutscher Metallhiitten- und Bergleute - Fachsektion Lagerstiittenforschung) - SGA (Society of Geology Applied to Mineral Deposits) Joint Meeting on Ore Deposits in Aachen, Federal Republic of Germany, September 16-19, 1985. Base metal sulfide deposits with different ore compositions occur in a wide variety of geological and lithological settings of almost any age. This has been taken into account in organizing this volume along the lines of classical host-rock classification. The first group of contributions focuses on sediment-hosted base metal sulfide deposits including examples of Kupferschiefer and Copperbelt-type, as well as lead-zinc mineralization in car- nate host rocks.
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 Exploration for Volcanogenic Massive Sulphide (VMS) Deposits in the Khoabendus Group, Near Kamanjab, Northwestern Namibia by : N. M. Steven
Download or read book Exploration for Volcanogenic Massive Sulphide (VMS) Deposits in the Khoabendus Group, Near Kamanjab, Northwestern Namibia written by N. M. Steven and published by . This book was released on 2000 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Lithogeochemical Analysis of the Heath Steele E Zone Volcanogenic Massive Sulphide Deposit, Bathurst Mining Camp, New Brunswick by : Josue Jimenez-Gonzalez
Download or read book Lithogeochemical Analysis of the Heath Steele E Zone Volcanogenic Massive Sulphide Deposit, Bathurst Mining Camp, New Brunswick written by Josue Jimenez-Gonzalez and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Heath Steele E zone Zn-Pb-Cu-Ag volcanogenic massive sulphide deposit lies in the Heath Steele belt in the Bathurst Mining Camp, northeast New Brunswick. The Heath Steele E zone deposit is hosted mainly by felsic volcanic and related volcano-sedimentary rocks of the Nepisiguit Falls Formation (Tetagouche Group), which were deposited in the Tetagouche-Exploits back-arc basin in the Middle Ordovician. The host sequence is affected by locally intense, deposit-related hydrothermal alteration, and polyphase deformation and mid- to upper-greenschist grade regional metamorphism related to inclusion of the host sequence in the Brunswick Subduction Complex. Numerous geological events have affected the E zone deposit and the host rocks, which have complicated a proper stratigraphic interpretation in the area. Furthermore, the similarity among the various volcano-sedimentary units precludes confident unit correlation among adjacent drill cores on the basis of macro-scale observations alone. For this reason, chemostratigraphy is employed to discriminate among the various volcano-sedimentary units, and for assessment of deposit related hydrothermal alteration using a portable X-ray fluorescence spectrometry (pXRF) as the main tool. The pXRF is a useful analytical tool for acquiring high-quality results in real-time with a level of resolution that surpasses most other techniques, thereby providing at least 30 potential variables for use in chemostratigraphic characterization and correlation. The pXRF analysis of eight drill cores of the study area facilitated: 1) the construction of discrimination diagrams that show that the host felsic volcanic rocks in the E zone deposit are rhyodacite/dacite and rhyolite with a tholeiitic magmatic affinity; consistent with an intracontinental back-arc environment, 2) the identification of geochemically distinct rock units in this case, a clear difference between structural hanging wall and footwall was recognized, and 3) qualitative characterization of hydrothermal alteration in the footwall (mainly chlorite-carbonate and chlorite-pyrite-sericite assemblage) and the hanging wall (K-feldspar-sericite and sericite-chlorite-pyrite assemblage).
Book Synopsis Volcanogenic Massive Sulphide Deposits of Latin America by : Ross Lawrence Sherlock
Download or read book Volcanogenic Massive Sulphide Deposits of Latin America written by Ross Lawrence Sherlock and published by . This book was released on 2000 with total page 658 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 Mineralogy, Mineral Chemistry, and Genesis of Precious Metal-bearing Volcanogenic Massive Sulfide Deposits in the Newfoundland Appalachians, Canada by : Stefanie Michaela Brueckner
Download or read book Mineralogy, Mineral Chemistry, and Genesis of Precious Metal-bearing Volcanogenic Massive Sulfide Deposits in the Newfoundland Appalachians, Canada written by Stefanie Michaela Brueckner and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ming deposit, Newfoundland Appalachians, is a metamorphosed (upper greenschist to lower amphibolite facies), Cambro-Ordovician, bimodalmafic volcanogenic massive sulfide (VMS) deposit that consists of several, spatially-associated, elongated orebodies composed of stratabound semimassive to massive sulfides and/or discordant sulfide stringers in a rhyodacitic footwall. Copper is the main commodity; however, the deposit contains precious metal-bearing zones with elevated Au grades. In this study, field observations, microscopy, and micro-analytical tools including electron microprobe, laser ablation inductively coupled plasma mass spectrometry, and secondary ion mass spectrometry were used to constrain the relative timing of precious metal emplacement, the physico-chemical conditions of hydrothermal fluid precipitation, and the sources of sulfur, precious metals, semi-metals and metals. The ore mineral assemblage is complex and indicates an intermediate sulfidation state. Pyrite and chalcopyrite are the dominant ore minerals with minor sphalerite and pyrrhotite, and trace galena, arsenopyrite and cubanite. Additional trace phases include tellurides, NiSb phases, sulfosalts, electrum, AgHg±Au alloys, and oxides. Silver phases and precious metals occur predominantly in semi-massive and massive sulfides as free grains, and as grains spatially associated with arsenopyrite and/or sulfosalts. Precious metal phases occurring between recrystallized pyrite and within cataclastic pyrite are rare. Hence, the complex ore assemblage and textures strongly suggest syngenetic precious metal emplacement, whereas metamorphism and deformation only internally and locally remobilized precious metal phases. The ore assemblage formed from reduced, acidic hydrothermal fluids over a range of temperatures (≈350 to below 260oC). The abundance of telluride and Ag-bearing tetrahedrite, however, varies strongly between the different orebodies indicating variable ƒTe2, ƒSe2, mBi, and mSb within the hydrothermal fluids. The variations in the concentrations of semi-metals and metals (As, Bi, Hg, Sb, Se, Te), as well as Au and Ag, were due to variations in temperature but also to a likely contribution of magmatic fluids into the VMS hydrothermal system from presumably different geothermal reservoirs. Sulfur isotope studies indicate at least two sulfur sources: sulfur from thermochemically-reduced seawater sulfate and igneous sulfur. The source of igneous sulfur is the igneous footwall, direct magmatic fluid/volatiles, or both. Upper greenschist to lower amphibolite metamorphic conditions and deformation had no significant effect on the sulfur isotope composition of the sulfides at the Ming deposit.
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