The boliden goldrich volcanogenic massive sulfide deposit, skellefte district, sweden. Processes and examples in modern and ancient settings. Volcanogenic massive sulfide deposits researchgate. Abstract volcanogenic massive sulfide deposits contain variable amounts of gold, both in terms of average grade and total gold content, with some vms deposits hosting. Here, i focus on the archean vms deposit, kidd creek, located near timmins, ontario, to study the nature of the oceanic sulfate reservoir, and to extract. More information about viewing, downloading, and printing report files can be found here. Volcanogenic massive sulfide deposits of northern wisconsin. Abstract volcanogenic massive sulfide deposits contain variable amounts of gold, both in terms of average grade and total gold content, with some vms deposits hosting worldclass gold mines with more than 100 t au. Previous studies have identified goldrich vms as having an average gold grade, expressed in gt, exceeding the total abundance of base metals, expressed in wt. Our new models are based on a reclassification of deposits based on host lithologies. In the 1960s, a new concept of sulfide ore deposition related to volcanic activity volcanogenic massive sulfide deposits led to widespread exploration activity by numerous companies for this type of deposit in the lake superior region. Volcanogenic massive sulfide deposits range in age from 3. Search here for records in the usgs volcanogenic massive sulfide database.
Geophysical characteristics of volcanogenic massive. A type of volcanic massive sulfide deposits associated with ophiolite. Further research has indicated a more complex spectrum of conditions for the. A new period of volcanogenic massive sulfide formation in the yilgarn.
Volcanogenic massive sulfide ore deposit wikipedia. Pdf volcanogenic massive sulphide deposits semantic. They typically occur as lenses of polymetallic massive sulphide that form at or near the seafloor in submarine volcanic. The data was recently used for mineral deposit density models mosier and others, 2007.
Jan 22, 2016 volcanogenic massive sulfide occurrence model 1. Sulfide mineralization in an ultramaficrock hosted seafloor hydrothermal system. The cambroordovician period has yielded the major development of volcanichosted massive sulfide vhms deposits in australia, resulting in about 12 million metric tons of contained metal copper, lead, and zinc, concentrated in the mount read volcanics tasmania and the mount windsor volcanics queensland, the archean 4 million metric tons of metal and the silurian 3. There is a subclass of vms deposits, the volcanic and sedimenthosted massive sulfide vshms deposits, that do share characteristics that are hybrid between the vms and sedex deposits. Intense deformation in many of the districts has resulted in deformed, flat sulfide sheet morphologies and irregular metal zoning. New insights into the genesis of volcanichosted massive. A simplified economic filter for underground mining of. Despite a sound theoretical understanding of sulfide deformation processes, only a few studies have documented the effects of metamorphism and deformation on sulfide textures and the primary sulfur isotope distribution in vms deposits e. Volcanicassociated massive sulfide vms deposits springerlink. The 348 range of sulfides from early proterozoic volcanogenic massive sulfides of arizona is narrow, 129 out of 3 measurements lying within a range of 2.
If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple faq for additional information. Notable examples of this class include the deposits of the bathurst camp, new brunswick, canada e. Geological survey volcanogenic massive sulfide occurrence model sea level backarc basin island arc midocean ridge oceanic intraplate volcanoes continental margin arc continental riftbackarc basin subducting slab continental lithosphere mantle plume. The boliden goldrich volcanogenic massive sulfide deposit. Volcanogenic massive sulphide deposits 143 ple bimodal definition of normal versus aurich vms deposits fig. The sulfide minerals represent higher temperatures and a slightly deeper setting than the sulfate minerals, which reflect the oxygenrich environment near the earths surface. From serpentinization to the formation of cuzncorich massive sulfides ana filipa a.
Sulfur isotopes in early proterozoic volcanogenic massive. Volcanogenic massive sulfide occurrence model usgs. Other articles where volcanogenic massive sulfide is discussed. Sulfur and lead isotope data from alaskan volcanogenic massive sulfide deposits are highly regular and conform to patterns found in other such districts worldwide. Chemical evolution and zonation of massive sulfide deposits in volcanic terrains ross r large on. Publication date 1996 series short course notes geological association of canada.
If you continue browsing the site, you agree to the use of cookies on this website. I have just modified one external link on volcanogenic massive sulfide ore deposit. Massive cuznpb sulfide deposits in predominantly volcanic terranes have been variously termed as volcanicassociated, volcanichosted, and volcanogenic. Volcanicassociated massive sulfide deposits seventyfifth. The sulfides accumulate on the seafloor or just below it, and precipitate from. Cartoon showing the formation of hydrothermal mineral deposits at midocean ridges. Volcanogenic massive sulfide deposits of the world database. Ore deposit is a natural concentration of one or more minerals within the host rock. In this paper, 867 deposits were used to construct revised grade and tonnage models. Australian volcanichosted massive sulfide deposits. Seafloor massive sulfide deposits or sms deposits, are modern equivalents of ancient volcanogenic massive sulfide ore deposits or vms deposits. The term has been coined by mineral explorers to differentiate the modern deposit from the ancient.
Volcanogenic massive sulphide deposits,types and its origin slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Pages in category volcanogenic massive sulfide ore deposits the following 8 pages are in this category, out of 8 total. Styles, textural evolution, and sulfur isotope systematics of. Volcanogenic massive sulfide vms deposits are important sources of base cu, zn pb and precious au, ag metals. This one covers volcanogenic massive sulfide vms and sedimentary exhalative. Processes and examples in modern and ancient settings in cooperation with with the mineral deposits division mdd of the geological association of canada gac contents classification of volcanicassociated massive sulfide deposits c. Geological survey volcanogenic massive sulfide occurrence model sea level backarc basin island arc midocean ridge oceanic intraplate volcanoes continental margin arc continental riftbackarc basin subducting slab continental lithosphere mantle. Geophysical characteristics of volcanogenic massive sulfide deposits figure 71. Wherever volcanism occurs beneath the sea, the potential exists for seawater to penetrate the volcanic rocks, become heated by a magma chamber, and react with the enclosing rocksin the process concentrating geochemically scarce metals and so forming a hydrothermal solution. Sulfide mineralization in an ultramaficrock hosted seafloor. Volcanogenic massive sulfide occurrence model edited by w. Volcanogenic massive sulphide deposits alan galley, mark hannington and ian jonasson geological survey of canada, 601 booth street, ottawa, on, k1a oe8 email. Type the beginning of the name of the site, and select a country if you wish. Volcanogenic massive sulfide vms deposits, together with their close analogs, sedimentaryexhalative massive sulfide deposits, have accounted for more than half of global production of zn and pb.
Vms volcanogenic massive sulphide deposits and nicuco type magmatic massive sulphide deposits volcanicassociated massive sulphide vms deposits occur throughout the world and throughout the geological time column in virtually every tectonic domain that has submarine volcanic rocks as an important constituent. The gold content of volcanogenic massive sulfide deposits. Part 7 of an 11 part series introducing ore deposit geology to nontechnical people. Vms deposits are dominated by copper and zinc, but there are a number of other minor minerals, including. Petrology and ore deposits volcanic hosted massive sulfide deposits is the property of its rightful owner. The data was recently used for mineraldeposit density models mosier and others, 2007. Volcanogenic massive sulfide deposit how is volcanogenic. Quantifying the release of base metals from source rocks for. Geologic, petrologic and geochemical relationships between magmatism and massive sulfide mineralization along the eastern galapagos spreading center. Volcanogenic massive sulphide deposits linkedin slideshare. Along with new concepts of ore deposition came new technology to aid in the search for mineral deposits. Tag massive sulfide deposit at 26n on the midatlantic ridge provides a unique opportunity to study sulfide textures and paragenesis from the internal parts of what can be considered a modernday analog, in terms of both internal structure and size, of ophiolitehosted massive sulfide deposits such as those found in cyprus and betts. Volcanogenic massive sulfide occurrence model sea level backarc basin island arc midocean ridge oceanic intraplate volcanoes continental margin arc continental riftbackarc basin subducting slab continental lithosphere mantle plume volcanogenic massive sulfide deposit explanation. Volcanogenic massive sulfide deposit listed as vmsd.
Pdf documents opened from your browser may not display or print as intended. The ophiolite hosts 41 exploited vms deposits that are up to 20 mt in size and vary from deposits with little or no base metals that were mined for sulfur e. Simulation results have been used to gain a better understanding of the formation of massive sulfide ore deposits, their location, zonation, size, and. Type a samples are angular slabs of dark grey znrich sulphide with interlayers and a thin, partlyoxidized crust of fesulphide. Massive sulfide ores were collected from active and inactive vents and smokers and from mounds of the hydrothermal jade field in the central okinawa trough japan, which is a tectonically active intracontinental backarc basin located in the northwestern pacific. Volcanogenic massive sulfide ore deposits wikipedia. Mineralogy and chemistry of massive sulfide deposits from the. Petrology and ore deposits volcanic hosted massive sulfide. Download the latest version of adobe reader, free of charge. Volcanogenic massive sulfide deposits of alaska mineral. Deposits of this type can range in size from several thousand to several million tonnes, and it is estimated that around 600 million tonnes of massive sulphide deposits occur within the easily accessible neovolcanic zone of midocean ridges. A new period of volcanogenic massive sulfide formation in the. Geology and mineralogy of massive sulfide ores from the.
Volcanogenic massive sulfide deposits of the world. Apr 15, 2016 volcanogenic massive sulphide deposits,types and its origin slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The deposits consist of a massive sulphide cap that formed on the seafloor and sort of lies parallel between two. Felsic, bimodalmafic, and mafic volcanogenic massive sulfide deposits. Schematic diagram of the modern transatlantic geothermal tag sulfide deposit on the midatlantic ridge, depicting a cross section of a volcanogenic massive sulfide deposit with concordant semimassive to massive sulfide lens underlain by a. Mafic volcanic rocks felsic volcanic rocks siliciclastic rocks sedimentary rocks the host of deposits is composed of large amount of mafic volcanic rocks with minor mafic volcanic and little siliciclastic sedimentary rocks such as shale. Sulfur isotopes in early proterozoic volcanogenic massive sulfide deposits. Sulfides occur as primary accessory minerals in many different igneous rocks and in deep hydrothermal deposits that are closely related to igneous intrusions. Volcanicassociated massive sulfide deposits are, as a group, predominantly stratiform accumulations of sulfide minerals which formed on or near the sea floor by precipitation near the discharge site of hydrothermal fluids. Nw cambridge, minnesota 55008 abstract the early proterozoic greenstone belt of northern wisconsin possesses some of the best volcanogenic volcanichosted massive sulfide vms potential in north america.
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