The main objective of this paper is to identify the geochemical, hydrological, igneous and tectonic processes that led to the variations in the physical size, geometry and chemical mineralogy, metal ratios and zoning characteristics of volcanogenic massive sulfide deposits with respect to space from a scale of mining district size area to a global scale and time from a deposits were used to construct revised grade and tonnage models. Nicu deposits these will be discussed under magmatic deposits. 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. The term has been coined by mineral explorers to differentiate the modern deposit from the ancient. Our pdf merger allows you to quickly combine multiple pdf files into one single pdf document, in just a few clicks. 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. Geophysical characteristics of volcanogenic massive. Volcanogenic massive sulphide deposits alan galley, mark hannington and ian jonasson geological survey of canada, 601 booth street, ottawa, on, k1a oe8 email. Our new models are based on a reclassification of deposits based on host lithologies.
A type of volcanic massive sulfide deposits associated with ophiolite. Four representative deposits are described to illustrate the essentially similar general character of all the deposits as well as the wide. Pages in category volcanogenic massive sulfide ore deposits the following 8 pages are in this category, out of 8 total. Volcanogenic massive sulphide vms base metal deposits. The widespread recognition of modern seafloor volcanogenic massive sulfide 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 oreforming processes and the tectonic. Jan 22, 2016 volcanogenic massive sulfide occurrence model 1. This report documents the volcanogenic massive sulfide deposits vms drilled during past exploration. Proton microprobe analyses of pyrite, chalcopyrite, and sphalerite, and part ii. Volcanogenic massive sulphide deposits 143 ple bimodal definition of normal versus aurich vms deposits fig. Ocean drilling program odp leg 158 recovery from the active 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 ana. In this paper, 867 deposits were used to construct revised grade and tonnage models.
Choose from a variety of file types multiple pdf files, microsoft word documents, microsoft excel spreadsheets, microsoft powerpoint. The plate boundaries have a total strike length in the. Western michigan university, 2015 the back forty znau deposit is the easternmost volcanogenic massive sulfide vms deposit in the penokean volcanic belt pvb. Mineraldeposit models combine the diverse geoscience information on geology, mineral occurrences, geophysics, and geochemistry used in resource. Mesozoic volcanogenic massive sulfide vms deposits in. 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. The nubian shield region also has important paleozoicneogene strata, including significant flood basalt, that conceal large areas of the basement. This one covers volcanogenic massive sulfide vms and sedimentary exhalative ore deposits 101 part 7 vms volcanogenic massive sulfides and sedimentary exhalative sedex deposits on vimeo join. Volcanogenic massive sulfide deposit listed as vmsd. Huston dl, sie sh, suter gf, cooke dr, both ra 1995 trace elements in sulphide minerals from eastern australian volcanichosted massive sulfide deposits.
Massive sulfide deposits of the bathurst mining camp, new. Volcanogenic massive sulfide ore deposits wikipedia. If we start with vms volcanogenic massive sulphide ore deposits and their mineralization we see from this image shows some of the sulphide chimneys associated with the model black smoker vms deposit. Volcanogenic massive sulfide occurrence model usgs. Formation of volcanogenic massive sulfide deposits. Tin and tinbearing minerals are prominent in the metamorphosed amphibolitegranulite facies geco cuzn volcanogenic massive sulfide deposit as well as in some of the smaller massive sulfides in the manitouwadge district. Aug 21, 20 nearly a quarter of the worlds zinc production is from volcanogenic massive sulphide vms deposits.
Volcanogenic massive sulfide deposits of northern wisconsin. Several small to mediumsized volcanogenic massive sulfide deposits have been identified within ophiolitic volcanic rocks of josephine county, oregon. Felsic, bimodalmafic, and mafic volcanogenic massive sulfide deposits. Along with new concepts of ore deposition came new technology to aid in the search for mineral deposits. Physical volcanology of volcanogenic massive sulfide deposits.
Information on vms deposits from around the world with new grade and tonnage models for three subtypes of vms deposits and data allowing locations of all deposits to be plotted using gis. Geochemical and petrological characterization of the back. The shield contains hundreds of gold occurrences and evidence of a 5,500year history of gold mining. 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 semi massive to massive sulfide lens underlain by a. Goldbearing volcanogenic massive sulfides and orogenic. Type the beginning of the name of the site, and select a country if you wish.
This originally was intended to identify deposits that are transitional between vms and epithermal deposits e. Vms will emit black plume of hot water venting from one of the chimneys. 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. Volcanogenic massive sulfide ore deposits, also known as vms ore deposits, are a type of metal sulfide ore deposit, mainly copperzinc which are associated with and created by volcanicassociated hydrothermal events in submarine environments. 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. The volcanogenic massive sulfide vms deposits in the troodos ophiolite cyprus are ancient analogues for modern day seafloor massive sulfide mineralisation formed in a suprasubduction zone. Cassiterite and minor snbearing andradite, epidote, rutile, and phlogopite occur within the massive sulfide ores.
Vms deposits also yield significant amounts of lead, silver, copper, and gold. Other articles where volcanogenic massive sulfide is discussed. This process results in black smokers which are the visual appearance of minerals precipitating in the cold water. 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. Volcanogenic massive sulfide deposits, also known as volcanichosted massive sulfide, volcanicassociated massive sulfide, or seafloor massive sulfide deposits, are important sources of copper, zinc, lead, gold, and silver cu, zn, pb, au, and ag. Following the discovery in 1979 of active hydrothermal vent systems in the presentday oceans hannington et al. Massive sulphide deposits massive sulphide deposits source 1. Volcanogenic massive sulfide deposits of the world database. Seafloor massive sulfides sms sms deposits are formed on the seafloor when hot water comes out of the seabed, hits the cold seawater and deposits its mineral load. The sulfides are underlain by hydrothermally altered lavas and by a stockwork zone. I have just modified one external link on volcanogenic massive sulfide ore deposit. Youll remember this cross section from reads on both porphyry deposits and epithermal, in the case of vms deposit, we. Volcanogenic massive sulfide deposits of the worlddatabase.
Volcanogenic massive sulfide ore deposits, also known as vms ore deposits, are a type of metal sulfide ore deposit, mainly copperzinc which are associated. 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. Search here for records in the usgs volcanogenic massive sulfide database. 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. Volcanogenic massive sulfide deposits researchgate. Geology, geochemistry, and genesis of cyprus sulfide deposits. Volcanogenic massive sulfide deposits vms are a thoroughly researched deposit class. This free online tool allows to combine multiple pdf or image files into a single pdf document. Abstract the hood volcanogenic massive sulfide vms deposits are hosted by the 2. Volcanogenic massive sulfide vms deposits are the most conspicuous type of deposits that formed during the mesozoic in mexico. The gold content of volcanogenic massive sulfide deposits. The massive sulfide deposits of cyprus occur near the top of a basic pillow lava sequence. Global distribution of seafloor massive sulfide deposits almost all sea. Pdf volcanogenic massive sulfide occurrence model pat.
Strickler published in oregon geology, october 1986. Themineralizedzonesconsist of massive to semi massive pyrrhotite, pyrite, chalcopyrite. 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. The data was recently used for mineraldeposit density models mosier and others, 2007. If you continue browsing the site, you agree to the use of cookies on this website. Geophysical characteristics of volcanogenic massive sulfide deposits figure 71. Economic geology monograph 11 massive sulfide deposits of the bathurst mining camp, new brunswick, and northern maine wayne d. In canada, approximately half of countrys zinc production is from vms deposits that also supply 40% of canadas silver production. Geologic setting of the turneralbright massive sulfide deposit josephine county, oregon. They typically occur as lenses of polymetallic massive sulphide that form at or near the seafloor in submarine volcanic. 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.
Further research has indicated a more complex spectrum of conditions for the. Soda pdf merge tool allows you to combine two or more documents into a single pdf file for free. Seafloor massive sulfide deposits or sms deposits, are modern equivalents of ancient volcanogenic massive sulfide ore deposits or vms deposits. Geology, alteration, and lithogeochemistry of the hood. Volcanogenic polymetallic massive sulfide deposits vms nc. Geochemical and petrological characterization of the back forty volcanogenic massive sulfide deposit anthony robert boxleiter, m. Polymetallic massive sulphide deposits are most commonly formed along tectonic plate boundaries and volcanic provinces in water depths from 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. Volcanogenic massive sulfide deposits one hundredth. Volcanogenic massive sulfide deposit how is volcanogenic. Pdf volcanogenic massive sulphide deposits semantic. Pdf merge combinejoin pdf files online for free soda pdf.
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