Дисертації з теми "Lead-zinc ore"
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Tong, Yan. "Technical amenability study of laboratory-scale sensor-based ore sorting on a Mississippi Valley type lead-zinc ore." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43411.
Повний текст джерелаAnderson, Iain Kerr. "Ore depositional processes in the formation of the Navan zinc/lead deposit, Co. Meath, Ireland." Thesis, University of Strathclyde, 1990. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23503.
Повний текст джерелаStalder, Marcel. "Petrology and mineral chemistry of sulphide ores and associated metalliferous rocks of the Gamsberg Zn-Pb deposit, South Africa : implications for ore genesis and mineral exploration." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16072.
Повний текст джерелаENGLISH ABSTRACT: The Gamsberg Zn-Pb deposit is a metamorphosed and multiply deformed sediment-hosted base metal deposit in the central Namaqua Province of South Africa. The deposit is hosted by the Bushmanland Group, a late Palaeoproterozoic (2000-1600 Ma) supracrustal succession of quartzite, metapelitic schist and interbedded metavolcanic rocks. Mineralisation occurs within the central part of the Gams Formation, a heterogeneous sequence of metamorphosed metalliferous sediments and fine-grained organic-rich shales. The ore horizon is subdivided into a lower unit of metapelite-hosted ore, an intermediate layer of phosphorite-hosted ore, and an upper unit of banded garnet-apatite ore. The ore body is enveloped by unmineralised silicate-, carbonate- and oxide-facies metalliferous rocks, which originally represented mixtures of Fe-Mn-rich hydrothermal precipitates, authigenic carbonate, and variable concentrations of detrital material. Based on mineralogical and geochemical characteristics, the metalliferous host rocks are subdivided into iron formations, coticules, Fe-Mn silicates, impure marbles and barite/Ba-rich quartzite. Minerals of the Gams Formation mostly represent solid solution between the Fe and Mn end-members of garnet, pyroxene, pyroxenoid, amphibole, olivine, spinel and ilmenite. Calcium-rich rock types are a typical feature and characterized by the occurrence of manganoan calcite, clinopyroxene, andradite-rich garnet and titanite. A successive increase in the (Mn+Ca):Fe value of rocks and minerals is evident with increasing distance from the ore horizon. Amphibole is restricted to Fe-rich ore-bearing assemblages, whereas orthopyroxene, clinopyroxene, Fe-rich pyroxenoid and olivine are present in intermediate assemblages, and Mn-rich rhodonite and pyroxmangite in the most manganiferous assemblages. These variations are mimicked by an increase in the Mn:Fe value of coexisting garnet and ilmenite group minerals with increasing distance from ore. LA-ICP-MS analyses have been used to constrain the REE patterns of garnet and apatite. In the ore-body, these minerals display a positive Eu anomaly, which is interpreted to reflect a distinct hydrothermal signature. In contrast, garnet and apatite in unmineralised metalliferous rocks display nil or a negative Eu anomaly. Primary features of the Gams Formation, such as REE patterns, the banded nature of garnet-apatite ore, the presence of diagenetic apatite nodules, and the distribution of the redox-sensitive elements Ba and Mn have been used to constrain palaeo-environmental conditions. The results indicate that metapelitehosted ore has been deposited in a stratified ocean that was characterised by anoxic bottom waters and precipitation of Fe and Zn sulphides into organic matter-rich shales. These rocks were superceded by phosphorite-hosted ore, garnet-apatite ore and metalliferous host rocks that developed in a suboxic to oxic environment. The large size of the deposit, the internal lamination of the ores and the predominance of sphalerite and barite are consistent with a vent-distal setting and precipitation of the ore-forming constituents from dense and reduced hydrothermal fluids, which originated due to reactivation of dormant growth faults. Collectively, the geological evidence indicates that Gamsberg is bridging the gap betweenthe SEDEX and BHT classifications. The relationships demonstrate that differences between these two classes of sediment-hosted Zn-Pb deposits are predominantly related to environmental conditions within localised third order basins and not to fundamental differences in ore-forming processes.
AFRIKAANSE OPSOMMING: Die Gamsberg Zn-Pb afsetting is ‘n meerfasig vervormde en gemetamorfiseerde sedimentgesetelde onedel metaal afsetting in die sentrale Namakwa Provinsie van Suid Afrika. Die afsetting word geherberg deur die Boesmanland Groep, ‘n laat Paleoproterosoïse (2000 – 1600 Ma) bokors-opeenvolging van kwartsiet, metapelitiese skis en tussengelaagde metavulkaniese gesteente. Mineralisasie word gevind in the sentrale deel van die Gams Formasie. Die Gams Formasie is ‘n heterogene opeenvolging van gemetamorfiseerde metaalhoudende sediment en fynkorrelrige organiese skalie. Die erts horison word onderverdeel in ‘n onderste laag van metapeliet-gesetelde erts, n sentrale laag van fosforiet-gesetelde erts, en ‘n boonste laag van gebande granaat-apatiet erts. Die erts-liggaam word omhuls deur ongemineraliseerde silikaat-, karbonaat- en oksied-fasies metal-ryke rotse. Hierdie gesteentes word geinterpreteer as oorspronklike mengsels van Fe-Mn-ryke hidrotermale partikels, outigeniese karbonaat, en verskeie hoeveelhede detritale materiaal. Gebaseer op mineralogiese en geochemiese kenmerke word hierdie rotse onderverdeel in ysterformasies, „coticules“, Fe-Mn silikate, onsuiwer marmer en barite/Ba-ryke kwartsiet. Minerale van die Gams Formasie form meestal soliede oplossingsreekse tussen die Fe en Mn endlede van granaat, pirokseen, piroksenoid, amfibool, olivien, spinel en ilmeniet. Kalsium-ryke rots tipes is ‘n tipiese kenmerk van die Gams Formasie en word gekenmerk deur mangaan-ryke kalsiet, klinopirokseen, andradiet-ryke granaat en sfeen. Daar word ‘n stapsgewyse vergroting van die (Mn+Ca):Fe verhouding in gesteentes en minerale gevind met toeneemende afstand van die erts horison. Amfibool is beperk tot Fe-ryke ertsdraende gesteentes, ortopirokseen, klinopirokseen, Fe-ryke piroksenoid en olivien tot intermediêre gesteentes, en Mn-ryke rodoniet en piroksmangiet tot Mn-ryke gesteentes. Hierdie variasies gaan gepaard met vergroting van die Mn:Fe verhouding in granaat en ilmeniet-groep minerale met toeneemende afstand van die erts. LA-ICP-MS analises was gebruik om die skaars-aarde element patrone van granaat en apatiet te bepaal. In die erts-liggaam wys hierdie minerale ‘n positiewe Eu anomalie, wat geinterpreteerd word as ‘n hidrotermale kenmerk. In ongemineraliseerde gasheer gesteentes wys granaat en apatiet geen of ‘n negatiewe Eu anomalie. Primêre kenmerke van die Gams Formasie, soos skaars-aarde patrone, the gebande voorkoms van granaat-apatiet erts, die teenwoordigheid van diagenetiese apatiet knolle, en die verspreiding van die redox-sensitiewe elemente Ba en Mn, was gebruik om afleidings oor die paleo-omgewing te maak. Die resultate het gewys dat metapeliet-gesetelde erts afgeset was onder anoksiese bodem water deur presipitasie van Fe en Zn sulfiedes in organiese skalie. Hierdie erts gaan oor in fosforiet-gesetelde erts, granaat-apatiet erts en metaal-ryke gasheer gesteente wat in ‘n suboksiese tot oksiese omgewing ontstaan het. Die grootte van die afsetting, die interne gelaagdheid van die erts, asook die teenwoordigheid van sfaleriet en bariet dui op ‘n distale omgewing relatief tot die hidrotermale bron en presipitasie van die ertsuit digte en gereduseerde hidrotermale vloeistowwe, wat ontstaan het deur die heraktiveering van rustende groeiverskuiwings. Gesaamentlik bewys die geologiese kenmerke van Gamsberg dat gemetamorfiseerde SEDEX en Broken Hill-tipe mineralisasie binne die perke van ‘n enkele afsetting kan voorkom. Die geologiese verhoudings dui aan dat verskille tussen hierdie twee tipes van sedimentgesetelde afsettings meestal veroorsaak word deur omgewings-toestande binne in gelokaliseerde derde orde komme en nie deur fundamentele verskille in ertsvormende prosesse nie.
Tchoumou, Martin. "Hydrometallurgie du cuivre en milieu chlorure : attaques de minerais dosages polarographiques des solutions resultant de l'attaque et depot cathodique du cuivre." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13154.
Повний текст джерелаLi, Ning. "Depositional controls and genesis of the Jinding sandstone-hosted Zn-Pb deposit, Yunnan Province, Southwest China /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаVita. One folded ill. in pocket. Includes bibliographical references (leaves 222-235). Available also in a digital version from Dissertation Abstracts.
Moradi, Saeid. "Hydrometallurgical processing of mixed sulphite-oxide lead and zinc ores." Thesis, Imperial College London, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549712.
Повний текст джерелаLardeau, Maria. "Mineralogie et petrogenese du minerai sulfure du gisement volcano-sedimentaire a zn-cu-ba-(pb-ag) de chessy-les-mines (rhone) : application a l'etude des amas sulfures metamorphises." Orléans, 1987. http://www.theses.fr/1987ORLE2053.
Повний текст джерелаLatorre, J. J. "Exploration for stratabound copper, lead and zinc deposits in the Damara-Katanga orogen, central-southern Africa." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005558.
Повний текст джерелаSaba, Mojtaba. "The Extraction Behaviour of Zinc, Lead and Silver from Ores and Concentrates by Glycine Leaching Processes." Thesis, Curtin University, 2019. http://hdl.handle.net/20.500.11937/81907.
Повний текст джерелаCHEN, SONG LING. "Application de la teledetection a la metallogenie de la montagne noire et de l'albigeois (massif central)." Toulouse 3, 1987. http://www.theses.fr/1987TOU30159.
Повний текст джерелаMiliton, Christian. "La metallogenie polyphasee a zn-pb-ba-f et mg-fe de la region de gedre-gavarnie-barroude (hautes-pyrenees)." Orléans, 1987. https://tel.archives-ouvertes.fr/tel-00798146.
Повний текст джерелаPerkins, William George. "A study of the nature, timing, and processes in the Mount Isa lead-zinc orebodies; their relationship to adjacent copper ore-bodies and the lead-zinc systems at McArthur River, Hilton, and Mount Novit." Thesis, 1996. https://researchonline.jcu.edu.au/38407/19/JCU_38407-perkins-1996-thesis.pdf.
Повний текст джерелаGreyling, Lynette Natasha. "The paleoproterozoic carbonate-hosted Pering lead-zinc deposit, South Africa." Thesis, 2012. http://hdl.handle.net/10210/4283.
Повний текст джерелаThe Pering Pb-Zn deposit is hosted in the stromatolitic dolomites of the Campbellrand Subgroup of the Ghaap Group, Transvaal Supergroup. The deposit is situated 20 km northeast of the town Reivilo in the semi-arid region of the Northwest Province, South Africa. It has been classified as a Mississippi Valley type deposit and is, together with the Bushy Park Pb-Zn deposit and F-Pb-Zn deposits near Zeerust, the only known MVT deposit of Paleoproterozoic age. The Pering open cast mine has been operational since 1986, yielding 18 Mt at an average ore grade of 3.6 wt.% Zn and 0.6 wt.% Pb. The aim of this study is to devise a metallogenetic model by integrating core logging, petrography, fluid inclusion and stable C-0-S isotope studies. The mineralogy includes sphalerite, galena and minor chalcopyrite as ore minerals, with diagenetic pyrite, hydrothermal dolomite, quartz and calcite as gangue minerals. Sphalerite predominates over galena. Mineralisation occurs as (a) disseminated stratabound replacements sheets restricted mainly to stromatolitic zones of the Steekdorings Member of the Reivilo Formation, and as (b) open space infill in breccia bodies that cross-cut the stratigraphy. Three events of hydrothermal brecciation, resultant of prolonged pulses of fluid infiltration, and mineralisation are recognised. The first brecciation event is marked by the cementation of the dolomite host rock by sparry dolomite, closely associated with finegrained disseminated sphalerite and galena. The second brecciation event is of minor importance, and is marked by the formation of small amounts of the second sphalerite generation, while the third, and final, brecciation event is marked by the formation of euhedral sphalerite, galena, quartz, sparry dolomite, and calcite as open space fill.
Jerzykowska, Irena. "Formy występowania Zn, Pb, As i Cd w środowiskach hipergenicznych rozwiniętych na składowiskach odpadów z wydobywania oraz przeróbki rud Zn i Pb z okolic Olkusza." Praca doktorska, 2014. http://ruj.uj.edu.pl/xmlui/handle/item/29128.
Повний текст джерелаTo estimate the degree of thret posed by heavy metals and other environmentally harmful elements it is necessary to determine the form in which the element occurs, in addition to the total content of the element. The aim of this thesis was to identify the formsof compounds in which Zn, Pb, As and Cd occur in weathering environments developed on wastes from the mining and processing of Zn and Pb deposits near Olkusz (S Poland). The study involved samples from ZGH "Bolesław" flotation tailings ponds active since 1986 and samples of soil profiles developed on four dumps after mining of oxidized ores from the end of the XIX century until 1985. Two types of methodswere used:mineralogical methods (optical and electron microscopy with in situelemental analysis,X-ray diffraction) and geochemical methods (selective sequential extraction and bulk elemental analysis). In the flotation tailings, Zn and Pb occur mainly in the form of sulphides and rarely in the form of carbonates. As is present usuallyas the admixture in Fesulphides. Cd occur in younger tailings as the impurity in Zn sulfides but in older tailings mostly in carbonate and ion-exchangeable form. Samples from the dumps of oxidized ores contain Zn in the form of smithsonite or hemimorphite, Zn aluminosilicates (smectite and kaolinite groups) and absorbed on Fe-oxide.The largest amounts of Pb is encountered in Mn-oxides and less in cerusite, Fe-oxides and dolomite.As dominates as the ions absorbed on goethite and Cd as an impurity in carbonates, silicates and Zn aluminosilicates, and in the form of exchange ions. Simultaneous application of geochemical and mineralogical methods for analysis of speciation of elements has shown that only a comprehensive approach to the problem of speciation of metals in contaminated soils and waste can yield reliable results and that selective sequential extraction method can not be used without a comparison with direct mineralogical methods. The study has shown that Cd occuring in the form of exchangeable ions, potentially available to living organisms, pose the greatest threat to the environment. Cd is the most mobile in the old tailings and in surface horizons of the soils developed on the oxidized ores dumps. Zn and Pb can be easily released from their forms in the event of a change of pH of the environment to a more acidic and As in case of changing conditions to more reductive.
Wallace, Sara Rose Bronwen. "The genesis of the Gayna River carbonate-hosted Zn-Pb deposit." 2009. http://hdl.handle.net/10048/408.
Повний текст джерелаTitle from PDF file main screen (viewed on July 10, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science, Department of Earth and Atmospheric Sciences, University of Alberta." Includes bibliographical references.
Feltrin, Leonardo. "Probabilistic and deterministic models of Pb-Zn mineralisation and post-mineralisation megabreccia, in the Lawn Hill region, Australia." Thesis, 2006. https://researchonline.jcu.edu.au/1614/1/01front.pdf.
Повний текст джерелаFeltrin, Leonardo. "Probabilistic and deterministic models of Pb-Zn mineralisation and post-mineralisation megabreccia in the Lawn Hill region, Australia /." 2006. http://eprints.jcu.edu.au/1614.
Повний текст джерелаKing, Clive Howard Matthew. "The geology of the Tsumeb carbonate sequence and associated lead-zinc occurrences on the farm Olifantsfontein, Otavi Mountainland, Namibia." Thesis, 2014. http://hdl.handle.net/10210/11704.
Повний текст джерела