Relevant bibliographies by topics / Lead deposits

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Academic literature on the topic 'Lead deposits'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Lead deposits"

1

Dejonghe, Léon. "Zinc–lead deposits of Belgium." Ore Geology Reviews 12, no. 5 (September 1998): 329–54. http://dx.doi.org/10.1016/s0169-1368(98)00007-9.

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Makeev, S. M., E. A. Muromtsev, V. A. Makarov, and G. V. Belokonov. "FEATURES OF LEAD AND ZINC METALLOGENY WITHIN THE YENISEI RIDGE." Ores and metals, no. 3 (November 11, 2020): 68–84. http://dx.doi.org/10.47765/0869-5997-2020-10022.

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Information collected on deposits, ore occurrences, and lead and zinc mineralization points known within the Yenisei Ridge is provided. A summary of the latest data on the geology and metallogeny of lead and zinc in the region is presented. A brief description of the deposits is given and their ore formation typification is carried out. The position of deposits in a stratigraphic section, the relationship with geological formations and tectonic structures, and subsequent conclusions about deposit location patterns and metallogenic zonality of the area were examined. The position analysis of polymetallic mineralization in regional geophysical and geochemical field revealed the presence of lead → zinc → barium trend from the Ishimbinsk fault towards the Siberian platform and the potential discovery of economically significant polymetallic mineralization in the eastern Yenisei Ridge.
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Idzikowska, Krystyna. "Preliminary research on lead absorption and translocation in root tip cells of Populus nigra "Italica" Moench." Acta Societatis Botanicorum Poloniae 57, no. 2 (2014): 217–22. http://dx.doi.org/10.5586/asbp.1988.021.

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Observations were carried out to define the place of lead absorption within three regions of the poplar adventitious root tip (<em>Populus nigra</em> "Italica" Moench.) after 24-hour exposure to a solution of Pb(N0<sub>3</sub>)<sub>2</sub> (25 mg dm<sup>-3</sup> Pb). Deposits of lead were not observed in certain cells of the apical part of the meristem. In other cells, lead deposits were first observed in the lumen of several endomembrane compartments - the endoplasmic reticulum, dictyosomal stacks and nuclear envelope. Certain differences were noted in the amount of deposits in protoplasts with varied electron density. In the cells with greater deposits, lead was also observed in the cytoplasm, the mitochondria and the paramural bodies. Practically no lead precipitated in the cell wall. The presence of lead in the form of small deposit granules in the plasmodesmata may suggest transfer from cell to cell.
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Rotemberg, Julio J. "A Behavioral Model of the Popularity and Regulation of Demandable Liabilities." American Economic Journal: Macroeconomics 7, no. 3 (July 1, 2015): 123–52. http://dx.doi.org/10.1257/mac.20130143.

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Overoptimism regarding one's ability to arrive early in a queue is shown to rationalize deposit contracts in which people can withdraw their funds on demand even if consumption takes place later. Capitalized institutions serving overoptimistic depositors emerge in equilibrium even if depositors and bank owners have identical preferences and investment opportunities. Consistent with the evidence, runs can lead people to move their deposits from one intermediary to another. Regulatory policies, including deposit insurance, minimum capital requirements and restrictions on the assets held by depository institutions can increase the ex ante welfare of depositors. (JEL G21, G28, G32, L51)
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Arping, Stefan. "Capital Regulation and Bank Deposits*." Review of Finance 23, no. 4 (June 13, 2018): 831–53. http://dx.doi.org/10.1093/rof/rfy019.

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Abstract Recent literature suggests that higher capital requirements for banks might lead to a socially costly crowding out of deposits by equity. This paper shows that additional equity in banks can help to crowd in deposits. Intuitively, as banks have more equity and become safer, the cost of deposit funding may decline; this, in turn, can encourage banks to expand their deposits. However, I also find that, for this effect to occur, capital requirements may have to be stringent enough: When bank capital is low, a small rise in capital requirements can cause banks to substitute equity for deposits. Overall, a non-monotonic relationship between the required amount of equity in banks and their level of deposit funding obtains.
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Hartog, F. A., G. Jonkers, A. P. Schmidt, and R. D. Schuiling. "Lead Deposits in Dutch Natural Gas Systems." SPE Production & Facilities 17, no. 02 (May 1, 2002): 122–28. http://dx.doi.org/10.2118/78147-pa.

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Stroud, Sally, and Janet Dyer. "Flecainide Treatment May Lead to Corneal Deposits." AJN, American Journal of Nursing 91, no. 11 (November 1991): 51. http://dx.doi.org/10.1097/00000446-199111000-00015.

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Stroud, Sally, and Janet Dyer. "Flecainide Treatment May Lead to Corneal Deposits." AJN, American Journal of Nursing 91, no. 11 (November 1991): 51. http://dx.doi.org/10.1097/00000446-199191110-00015.

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9

Sangster, D. F., P. M. Outridge, and W. J. Davis. "Stable lead isotope characteristics of lead ore deposits of environmental significance." Environmental Reviews 8, no. 2 (February 1, 2000): 115–47. http://dx.doi.org/10.1139/a00-008.

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Stable Pb isotopes are increasingly used in environmental science as tracers of natural and anthropogenic Pb sources. This review provides a summary of the recent geological literature concerning Pb isotopes in global Pb ore deposits. The isotopic characteristics of 151 Pb deposits, including 78 20th-century producing mines, have been summarized using the 204Pb-based ratios common to geological science and the 206Pb- and 207Pb-based ratios (i.e., excluding 204Pb) more often employed in environmental studies. A number of current mines, including those exploiting several Australian, Scandinavian, and U.S.A. deposits, have extreme isotopic compositions that provide unique signatures. However, a majority of mines (and unproductive deposits) fall within a relatively narrow range:206Pb/207Pb of 1.15-1.22 and 208Pb/207Pb of 2.42-2.50. In some contexts, unequivocal identification of a source exhibiting one of these common signatures would be difficult, especially with the relatively low precision (ca. 0.2-0.5% RSD) of quadrupole inductively coupled plasma - mass spectrometry (ICP-MS) which has been the most common instrument for environmental Pb isotope measurements. In settings with disparate industrial and natural Pb signatures (i.e., sources withisotopic ratios differing by about 2% or more), ICP-MS precision is adequate for source discrimination. Statistical analyses suggested that while 204Pb is critical for identifying a small proportion of environmental Pb sources, about 86% of the source discrimination power is due to the 206Pb, 207Pb, and 208Pb isotopes. Thus, the requisite analytical precision, rather than a lack of 204Pb data, is the most critical issue with respect to unequivocal identification of Pb sources in most cases. Several factors, especially the increasing dominance of recycling in global Pb production and the international transportation of ore concentrate and refined Pb, may cause unpredictable changes in the isotopic signatures of industrial sources,with a long-term trend towards homogenization. More frequent,comprehensive, and high-precision isotopic characterization of possible point and non-point Pb emitters such as gasoline, smelters, and battery-recycling plants, together with increased efforts to document the origin of constituent leads in industrial sources, would help to address these concerns.Key words: lead isotopes; lead pollution; source identification; lead ore deposits.
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Gulson, Brian L. "Shale-hosted lead-zinc deposits in northern Australia; lead isotope variations." Economic Geology 80, no. 7 (November 1, 1985): 2001–12. http://dx.doi.org/10.2113/gsecongeo.80.7.2001.

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Dissertations / Theses on the topic "Lead deposits"

1

Lewis, Helen. "Characterisation of fluid-flow systems for Irish lead-zinc deposits." Thesis, University of Glasgow, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337511.

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Blood, James. "Electrochemical studies of PbOâ‚‚ battery plate materials and PbOâ‚‚ anodic deposits." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268814.

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Ceyhan, Nuri. "Lead Isotope Geochemistry Of Pb-zn Deposits From Eastern Taurides, Turkey." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/3/1054592/index.pdf.

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This study is concerned with the Pb-isotope compositions of galena samples from Pb-Zn occurrences in southern Turkey. The purpose is to i) provide chronologic information for ore deposition, ii) investigate the likely source(s) of lead in ore deposits, and iii) examine the possible control of tectonic setting and crustal basement on Pb-isotope compositions. The data used in the study belongs to the deposits located in Taurides (Zamanti, KahramanmaraS, Malatya, Elazig, Bitlis), with additional data from Nigde Massif and Hakkari Area. The mineralizations are dominantly carbonate-hosted Pb-Zn deposits formed as fracture and karst fillings and, in some places, parralel to bedding. Ore minerals are mainly Zn-oxides and minor Zn, Pb-sulphides. The Pb-isotope compositions, as evaluated in terms of their configuration with respect to reference crustal growth curves and reference isochrons on conventional Pb-isotope diagrams, point to U/Pb ratios greater than average crustal values (and close to the Western Mediterranean Crustal Growth Curve) for all the deposits, indicating upper crustal source for Pb. However, some of the deposits (AfSin-KahramanmaraS
Oreks, Dü
ndarli, AgcaSar and skarn type deposits to the south of Ç
adirkaya in Zamanti (Kayseri-Adana)
Keban-Elazig) appear to have magmatic inputs in their genesis. Relatively old deposits are likely Paleozoic (Cafana-Malatya and Tü
rksevin-KahramanmaraS), Late Paleozoic-Early Mesozoic (Kalekö
y-Zamanti) and Mesozoic (Hakkari) in age. The rest of the deposits (most of the occurrences in Zamanti, Nigde, KahramanmaraS, Elazig and Bitlis) are likely of Cenozoic age. The Pb-isotope compositions are, in general, similar to those from other occurrences in the Mediterranean Belt.
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Whitbread, Michael Andrew Ian, and n/a. "Lithogeochemichal alteration aound the Century and Elura Zn-Pb-Ag deposits: detecting alteration expressions in deep and near surface environments." University of Canberra. Resource, Environmental & Heritage Sciences, 2004. http://erl.canberra.edu.au./public/adt-AUC20051129.112425.

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Exploration companies commonly rely on geochemistry to identify alteration of distinctive geochemical and mineralogical character, surrounding metal sulphide deposits that were precipitated from hydrothermal fluids. However, examination of raw analytical data is prone to error due to closure effects and the difficulty in removing the effects of background variation in unaltered rocks from the variations imposed by later hydrothermal alteration. Closure can be avoided by using ratios, or by utilising mass balance approaches based on fixing volume, mass or concentration changes between samples of parent and daughter lithologies. Using a parent-daughter approach is limiting, because only pairs of samples can be compared at any one time and because an unaltered equivalent must be produced for each sample examined in this way. Pearce Element Ratio analysis and General Element Ratio analysis (PER and GER) are not restricted in this fashion, and are more amenable to interrogation of large data sets. PER and GER are also capable of decoupling background variation from that variation due to hydrothermal alteration. Furthermore, these ratio methods are readily applied to commercially derived lithogeochemical assays. In this study, various analytical methods and interpretive techniques (including PER and GER) have been applied to identify alteration in rocks around the Century and Elura Zn-Pb-Ag deposits, and to assess whether primary ore-related alteration effects can still be identified once altered rocks have been subjected to weathering. Ratios of trace elements over a conserved element have been used to generate a suite of pathfinder elements for each deposit. Elements enriched in host rocks around both deposits include the economic metals Zn, Pb and Ag, along with Rb and Tl. Sodium is ubiquitously depleted in altered rocks. Other elements in the pathfinder suites are distinctive to each deposit type, and include a number of major and trace elements that are added or removed from the rocks around the mineralised zones. For example, Sb and As are enriched in rocks around Elura mineralisation while Ge and Cd are enriched in samples around Century deposit. Iron carbonate development accompanied by potassic alteration, the destruction of albite and the absence of chlorite are the dominant mineral alteration effects at both deposits. PER and GER diagrams have been used to quantify the intensity of this alteration and allow lithogeochemistry to be used to vector towards high intensity alteration, which is adjacent to Century and Elura mineralisation. These ratio methods are applied to both visibly and cryptically altered rocks at both deposits, and have a very high degree of success in classifying alteration in unweathered rocks. The following simple PER ratios indicate proximity to Elura mineralisation: Ca/C, K/Al for shales, K/(Al-Na) for siltstones/sandstones. The following simple PER ratios indicate proximity to Century mineralisation: Mn/Ti, Mg/Ti and Fe/Ti vs C/Ti, K/Ti vs Al/Ti, K/Ti vs (Al-Na)/Ti. Pathfinder elements can be overlain onto PER and GER diagrams to aid in ranking the prospectivity of samples, and to assess mineral hosts for individual pathfinder elements. Weathering destroys most indicators of alteration in the Elura area, while alteration signatures are better preserved in host rocks around the Century deposit.
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Dudek, Nickolas. "Evaluating the Source and Use of Radon for Exploring Deeply Buried Uranium Deposits." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36187.

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This project’s goal is to evaluate the use of groundwater Rn as a tool for the search of deeply buried U deposits. To do so, the concentrations of major cations, anions, Rn, 4He, and 3H were measured in groundwater. Additionally, the abundance, composition, and distribution of radionuclides (U, Ra, 206Pb, 207Pb, 208Pb), were measured in soil and sandstone above the Denison Mines’ Phoenix Deposit (located at a depth of ~450 m). Rn was extracted from groundwater using mineral oil, and higher groundwater Rn radioactivity (average 0.13 Bq/g of water, n=10) was found in drill holes within ~100 meters of the Phoenix Deposit’s surface projection than in distal holes (average 0.072 Bq/g of oil, n=4). High Rn radioactivity is independent of the drill holes’ intersection with U ore, indicating that drilling did not transport significant amounts of Rn or parent isotopes to shallow depths. The water table is commonly within the Dunlop Member of the Athabasca sandstones, and groundwater Rn is positively correlated with average U concentrations obtained by modified aqua regia digestion of sandstones (analytical code 2AMS at the Saskatchewan Research Council) and also positively correlated with U in three-acid digestion of sandstones (analytical code 3AMS at the Saskatchewan Research Council). Diffusion models show Rn cannot travel significant distances, and so Rn is likely produced in MFd from the in-situ decay of U and Ra. 226Ra radioactivity was measured for B horizon soil samples (n=39) and sandstone samples (n=20) after a HCl leach followed with BaSO4 precipitation. An extraction efficiency for Ra of 28.2%±3.8%. was determined by comparing the soil BaSO4 precipitation procedure against unprocessed soils. Ra radioactivity in B horizon soil is lower than expected from U contents determined with INAA. Ra radioactivity is comparable to the values expected from INAA U concentrations (n=17) in sandstone, with exception to 4 Dunlop Member samples and 2 samples in the Read Formation and Bird Member. Ra in 4 of 5 samples in the Dunlop Member are 10-50% overabundant, perhaps resulting from Ra percolating downwards from soil. The proposed interpretation is consistent with lower than expected Ra radioactivity of B horizon soil. Ra is 260% and 420% overabundant in the two samples from the Read Formation and the Bird Member (1 each), suggesting upward migration of Ra from the U deposit. Low solute concentration and a neutral-weakly alkaline pH of shallow groundwater in the study area appears to prevent significant travel of Ra ions through groundwater by means of ion absorption competition. Pb isotopic compositions were determined using an ICP-MS for sandstones and soil via three different leaches; 0.02 N HBr, 2.7 N HCl, and concentrated HBr. Overall, Pb isotopic compositions of MFd (n=5) and B horizon (n=10) are similar, supporting the percolation of acidic surface waters through soil. One sample from RD (among 4 samples) show high 206Pb, suggesting an upward migration of 206Pb from the deposit. The ratios of 4He/3He in ground water ranged between 0.95-1.07; typical of groundwater-atmosphere interaction. The lateral flow of groundwater at deep levels can explain the absence of higher 4He/3He.
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Goutier, Françoise Mélanie. "Galena lead isotope study of mineral deposits in the Eagle Bay Formation, southeastern British Columbia." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26264.

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The Eagle Bay Formation in the Adams Plateau-Clearwater area, 35km northeast of Kamloops, hosts several economic and sub-economic mineralized occurrences. The age and genesis of these mineral deposits can be estimated by using a specific growth curve which depicts the lead evolution for the Eagle Bay Formation. This curve, named the remodeled curve, represents a local deviation from the average 'shale' curve of Godwin and Sinclair (1982) for the autochthonous part of the Canadian Cordillera. This remodeled curve is specifically applicable to the Adams Plateau-Clearwater area. The lead isotope data from the deposits of the Eagle Bay Formation plot in three distinct clusters along the curve indicating that the lead isotopic signature of the Eagle Bay Formation is upper crustal, and that three periods of mineralization can be recognized or 'fingerprinted'. Accordingly, mineralization cogenetic with Devonian volcanism, and veins related to Cretaceous magmatism can be distinguished by location of galena-lead isotope values within clusters 1 or 3 respectively. Cluster 2 reflects a Late Triassic pulse of mineralization and includes epigenetic veins and stratiform deposits. These deposits are either replacement or cogenetic with their host. The Triassic model age for mineralization that is apparently stratiform and cogenetic raises questions about the currently assigned Cambrian age of associated host rock. To accommodate the lead isotope data a new Upper Triassic unit (T-EBG) within the Eagle Bay Formation is defined. The distinctive lead isotopic signature between deposits hosted by the Eagle Bay Formation is valuable as a guide for future mineral exploration programs in the Adams Plateau-Clearwater area. Recognition of lead isotopic fields that fingerprint types of mineral deposits, provides a useful and practical framework for the classification and evaluation of new mineralized prospects in the area.
Science, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
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Smyth, D. "Biogeochemical prospecting applied to deposits of orthomagmatic copper-nickel-PGE, lode gold and lead in Ireland." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390857.

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Latorre, 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.

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The Damara-Katanga orogen in central-southern Africa represents an area of 1.73xl0⁶ sq. km. The region is considered one of the wealthiest metallogenic provinces in the world. Successful exploration for stratabound base-metal deposits has taken place at this particular area since the introduction of more organised methodology in the early 1920s. The genesis, location and distribution of the ore deposits are related to their tectonic settings. Geodynamic evolution of the orogen, which initially formed part of a complex Pan-African rift system, comprises the following stages rifting; downwarping, including spreading on the western portion; syn-orogeny and late-orogeny. Two major tectonic events in the history of the region have been identified: the Katangan (900-750 Ma) and the Damaran episodes (750-500 Ma). Timing of mineralisation of ore deposits has been related to the evolutionary stages of the orogen. Genetic models of the most productive deposits are briefly discussed in this dissertation. The sedimentological, geochemical, paleogeographic and structural features can be employed as geological guidelines for integrated exploration programmes. Discoveries of major deposits and prospects in the orogen are also summarised, focussing on the exploration methods employed. The cost-effective use of the exploration techniques includes the classical copper-lead-zinc soil sampling for residual soils such as those in the Copperbelt area. Airborne magnetics and electromagnetics and follow-up ground geophysics have proved successful in areas where the cover is transported in the search for shallow ore deposits such as the Matchless massive sulphides. Remote sensing, geochemical and geophysical techniques have been tried in covered areas of western Botswana. The lack of geological control makes this interpretation difficult. A detailed geological mapping and the use of geochemical and geophysical techniques has been used to delineate carbonate-hosted base-metal deposits at the Otavi Land. The more expensive traditional methods necessary for the delineation of orebodies, such as pitting, trenching and drilling, are also discussed. Using a sequential approach, a possible exploration strategy is suggested, outlining the cost-effective use of remote sensing, geochemical and geophysical techniques. Standardisation in basic geological information is required for future successful explorations in the Damara-Katanga orogen, as well as attractive mining policies. In the event of their implementation, exploration perspectives are promising, specifically in terms of ore potential.
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Andrew, Anne. "Lead and strontium isotope study of five volcanic and intrusive rock suites and related mineral deposits, Vancouver Island, British Columbia." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26953.

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Lead isotope compositions have been obtained from five major volcanic and intrusive rock suites and several ore deposits on Vancouver Island. Lead, uranium and thorium concentrations and strontium isotope ratios have been obtained for a subset of these samples. The rock suites examined are the Paleozoic Sicker Group, Triassic Karmutsen Formation, Jurassic Island Intrusions and Bonanza Group volcanic rocks, and the Eocene Catface intrusions. Isotope geochemistry of the Sicker Group is consistent with the interpretation that it formed as an island arc. Relatively high 207pb/204pb ratios indicate sediment involvement in the subduction process, which suggests that the Sicker Group formed close to a continent. Buttle Lake ore deposits display decreasingly radiogenic lead isotope ratios with time, suggesting that the associated magmas become increasingly primitive. This supports the hypothesis that these deposits formed during the establishment of rifting in a back-arc environment. Karmutsen Formation flood basalts display isotopic mixing between an ocean island-type mantle source and average crust. Isotopic evidence is used to support a Northern Hemisphere origin for these basalts. Mixing is apparent in the lead and strontium isotope signatures of the Island Intrusions and Bonanza Group volcanic rocks, between depleted mantle and crustal (possibly trench sediments) components. This is consistent with formation of these rocks in an island arc environment. Eocene Catface intrusions have relatively high 207pb/204pb indicating that crustal material was involved in their formation. There are two groups of plutons corresponding to an east belt and west belt classification. Galena from the Zeballos mining camp related to the Eocene Zeballos pluton indicates that the mineralization was derived from the pluton. Galena lead isotope data from Vancouver Island may be interpreted in a general way by comparison with data from deposits elsewhere of known age and origin. No single growth curve model can be applied. Lead isotope characteristics of Vancouver Island are clearly different from those of the North American craton, reflecting the oceanic affinities of this terrane. A new technique has been developed to compare 207pb/204pb ratios between samples with differing 206pb/204pb ratios. The procedure projects 207pb/204pb ratios along suitable isochrons until they intersect a reference value of 206pb/204pb. This technique can be used for interpreting lead isotope data from old terranes, in which lead and uranium may have undergone loss or gain, and if lead and uranium abundances have not been measured.
Science, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
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10

Leonel, Letícia Gameiro. "Aplicação de variáveis indicadoras na avaliação da incerteza volumétrica em um depósito de Zn-Pb." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/44/44137/tde-24022016-092459/.

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Santa Maria é um projeto de exploração mineral conduzido pela empresa Votorantim Metais Ltda, com foco nas comodities zinco e chumbo. Localizado no estado do Rio Grande do Sul, próximo das antigas minas de Camaquã e Uruguay, o projeto se encontra em uma região geologicamente fértil para exploração mineral. O depósito de Santa Maria possui informações suficientes para permitir a avaliação dos recursos minerais e também estudos de viabilidade econômica de projeto, entretanto, sua mineralização ocorre de forma heterogênea e condicionada a feições geológicas estruturais complexas, inserindo dúvidas à respeito da forma e volume dos corpos mineralizados. O objetivo desta pesquisa é a avaliação da incerteza associada à modelagem dos corpos mineralizados. Essa avaliação foi realizada através da comparação entre o modelo tridimensional confeccionado por interpretação de seções e outros dois modelos probabilísticos: um gerado por krigagem de indicadoras e outro gerado por simulação sequencial de indicadoras, que permitiu a interpretação da incerteza associada. Com os resultados obtidos foi possível quantificar os valores de volume máximo, mínimo e médio esperado no depósito, além de avaliar regiões de maior e menor confiança. A utilização conjunta dos métodos de krigagem de indicadoras e simulação sequencial de indicadoras se mostrou uma excelente opção para avaliação do modelo interpretado. Através do tratamento dos resultados foi possível obter informações à respeito da variabilidade local e global do depósito e sobre o comportamento espacial da mineralização. Os resultados e interpretações obtidos podem ser aplicados em trabalhos futuros no depósito, como na classificação do recurso mineral, no refinamento do modelo geológico e no planejamento de futuras malhas de sondagem infill.
Santa Maria is a mineral exploration project conducted by Votorantim Metais Ltda, with focus on zinc and lead extraction. The project is located in the state of Rio Grande do Sul, in the vicinities of the old mines of Camaquã and Uruguay, a favorable area for mineral exploration. There is enough information about Santa Maria\'s deposit to allow the estimation of mineral resources and the project\'s economical viability study, however, its mineralization occurs in heterogeneous ways and is conditioned to complex geological structural features, casting doubts about the shape and volume of the ore bodies. The main goal of this research is evaluating the uncertainty associated with the modeling of the orebodies. This evaluation was performed by comparing a three-dimensional model created by section interpretation and other two probabilistic models: one generated by indicator kriging, and the other generated by sequential indicator simulation, which allowed the interpretation of the associated uncertainty. Based on the obtained results, it was possible to quantify the maximum, minimum and average expected volume of the deposit, and also to evaluate the regions of most and least reliability. The joint use of indicator kriging and sequential indicator simulation methods proved to be an excelent tool for evaluating the interpreted model. By processing the results it was possible to obtain information about deposit\'s local and global variability and spatial behavior of mineralization. The obtained results and interpretations can be applied in deposit\'s further sutdies, for instance, to classify the mineral resource, to refine the geological model or to plan future infill drilholes.
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Books on the topic "Lead deposits"

1

Saunders, Cynthia Margaret. Carbonate-hosted lead-zinc deposits of western Newfoundland. Ottawa, Canada: Geological Survey of Canada, 1992.

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Ferguson, K. M. Lead, zinc, and silver deposits of Western Australia. Perth, W.A: Geological Survey of Western Australia, 1999.

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McCammon, Richard B. Undiscovered deposits of gold, silver, copper, lead, and zinc in the conterminous United States. [Reston, Va.?]: U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Geological Survey of Western Australia., ed. Studies of selected carbonate-hosted lead-zinc deposits in the Kimberley region. Perth, Western Australia: Dept. of Mines, 1989.

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W. Dan Hausel. Copper, Lead, Zinc, Molybdenum and Associated Metal Deposits of Wyoming. [Laramie, Wyo.]: Wyoming State Geological Survey, 1997.

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Sangster, D. F. Classification, distribution and grade-tonnage summaries of Canadian lead-zinc deposits. Ottawa: Minister of Supply and Services, 1986.

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Sangster, D. F. Classification, distribution, and grade-tonnage summaries of Canadian lead-zinc deposits. Ottawa, Canada: Geological Survey of Canada, 1986.

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Energy, Mines and Resources Canada. Mine reserves and currently promising deposits: Gold, silver, lead, zinc, copper, nickel, molybdenum. Ottawa: Energy, MInes and Resources Canada, 1985.

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Fuhrer, Gregory J. Extractable cadmium, mercury, copper, lead, and zinc in the Lower Columbia River estuary, Oregon and Washington. Portland, Or: U.S. Dept. of the Interior, Geological Survey, 1986.

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Minerals, Canada. Mine Reserves and Currently Promising Deposits: Gold, Silver, Lead, Zinc, Copper, Nickel, Molybdenum. S.l: s.n, 1985.

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Book chapters on the topic "Lead deposits"

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Batkhishig, Bayaraa. "Lead-Zinc Deposits." In Modern Approaches in Solid Earth Sciences, 211–33. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5943-3_7.

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Romer, Rolf L. "Uranium-Lead, Ore Deposits." In Encyclopedia of Scientific Dating Methods, 1–7. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6326-5_203-2.

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Romer, Rolf L. "Uranium–Lead, Ore Deposits." In Encyclopedia of Scientific Dating Methods, 903–6. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_203.

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Misra, Kula C. "Mississippi Valley-Type (MVT) Zinc-Lead Deposits." In Understanding Mineral Deposits, 573–612. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-3925-0_13.

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Romer, Rolf L. "Uranium-Lead Dating, Ore Deposits." In Encyclopedia of Scientific Dating Methods, 1. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6326-5_203-1.

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Misra, Kula C. "Sediment-Hosted Massive Zinc-Lead Sulfide (SMS) Deposits." In Understanding Mineral Deposits, 497–538. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-3925-0_11.

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Edwards, Richard, and Keith Atkinson. "Sediment-hosted Copper—Lead—Zinc deposits." In Ore Deposit Geology and its Influence on Mineral Exploration, 215–73. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-011-8056-6_6.

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Puig, A. "Lead Isotopes in the Chilean Ores." In Stratabound Ore Deposits in the Andes, 749–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_59.

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Orgeval, Jean-Jacques, Catherine Guerrot, Svetlana G. Tessalina, Bernard Bourdon, Victor Zaykov, Claudia Buley, Berndt Bushmann, Richard Herrington, and Rex Taylor. "Lead isotopic systematics of Urals massive sulphide deposits." In Mineral Deposit Research: Meeting the Global Challenge, 667–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_170.

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Wellmer, F. W., T. Atmaca, M. Günther, H. Kästner, and A. Thormann. "The Economics of Sediment-Hosted Zinc-Lead Deposits." In Sediment-Hosted Zn-Pb Ores, 429–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-03054-7_21.

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Conference papers on the topic "Lead deposits"

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Hartog, F. A., G. Jonkers, A. P. Schmidt, and R. D. Schuiling. "Lead Deposits in Dutch Natural Gas Systems." In International Symposium on Oilfield Scale. Society of Petroleum Engineers, 2001. http://dx.doi.org/10.2118/68316-ms.

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Rock, Marlena J., and Mark R. Frank. "EXPERIMENTAL CONSTRAINTS ON LEAD-ZINC HYDROTHERMAL DEPOSITS." In 52nd Annual North-Central GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018nc-312217.

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Frank, Mark R., and Marlena J. Rock. "EXPERIMENTAL CONSTRAINTS ON LEAD-ZINC DEPOSITS OF THE ILLINOIS BASIN." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-322452.

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Knight, Colette C., James C. Carnahan, Kevin Janora, and John F. Ackerman. "Jet Fuel Oxidation and Deposition." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-183.

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The chemistry leading to homogeneous deposit formation when Jet A fuel is heated between 170–300°C was investigated by characterizing both the deposits and changes in the fuel after deposit formation. The maximum amount of deposits that form from static Jet A fuel heated at 200°C with a continuous airflow is ∼5 wt. % indicating the presence of a finite concentration of easily oxidizable species that lead to the deposits. The deposits were characterized using CPMAS NMR, FTIR, elemental analysis, GCIR and chemical derivatization. They are highly aromatic, enriched in oxygen, nitrogen and sulfur relative to the fuel, and contain carboxylic acids and ketone functional groups. The role of nitrogen and sulfur containing compounds is also discussed. Gel permeation chromatography (GPC) of derivatized heated fuel shows a substantial growth in molecular weight. We find hydrocarbons equivalent to C-70 oxidation compounds in fuel heated in an air environment. In Jet A fuel, whose deposit formation capacity is not exhausted, the latter can continue to react at room temperature to form deposits. This is a concern especially for recirculating applications since it implies that once the fuel has been heated, deposits can precipitate in the holding tanks even when the fuel is cool.
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Mizernaya, M., B. Dyachkov, A. Miroshnikova, and A. Mizerny. "INDUSTRIAL TYPES OF GOLD DEPOSITS OF THE EAST KAZAKHSTAN." In GEOLINKS International Conference. SAIMA Consult Ltd, 2020. http://dx.doi.org/10.32008/geolinks2020/b1/v2/14.

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The East Kazakhstan territory is the unique geologic province where a number of large-scale non-ferrous and gold deposits are concentrated [1]. Gold base metals (gold-containing) type is represented by gold containing sulphide complex deposits. It is characterized by many large-scale commercial deposits of copper, lead and zinc where gold as well as silver, cadmium, platinum, selenium and other elements are the associate component of copper-sulphide and sulphide complex deposits [2]. There are following ore types are distinguished: gold-listvenite type occurs in the Irtysh zone (Maraliha deposit); the gold-sulphide vein-disseminated type associated with island-arc, volcanogenic-carbonate-terrigenous formation С1v2-3 (Suzdalskoye, Baibura, Mirazh, Zhaima); gold-quartzite type is characterized by gold-quartzite-vein deposits in West Kalba zone (Kuludzhun, Sentash, Kazan-Chunkur and others); gold-arsenic-carbon-bearing type is presented by large, middle and small deposits of Bakyrchik’s group (Bakyrchik, Bolshevik, Gluboky Log and others). Last one is formed on middle-Hercynian collision ore-bearing level (С2-С3) [3]. Multiple-stage concentration of gold contributed to formation of very large deposits. Gold content ranges from is 0.2 to 60 g/t, average is 8-9 g/t. Considerable part of gold is found in micro- and nanoparticles, nanotubes containing Au, Ag, Pt, Pd, W, Mo, Sn, Y, Yb, Ta and other elements [
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Legault, Jean M., Shengkai Zhao, Ali Latrous, Nasreddine Bournas, Geoffrey Plastow, and Gabe Xue. "Passive airborne EM and magnetics over SEDEX lead-zinc deposits at Howard's Pass, Yukon." In International Workshop and Gravity, Electrical & Magnetic Methods and their Applications, Chenghu, China, 19-22 April 2015. Society of Exploration Geophysicists and and Chinese Geophysical Society, 2015. http://dx.doi.org/10.1190/gem2015-081.

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Pavlowsky, Robert, Marc Owen, Derek J. Martin, and Scott A. Lecce. "SEDIMENT BUDGET APPROACH TO ASSESS TAILINGS AND LEAD STORAGE IN CHANNEL AND FLOODPLAIN DEPOSITS IN BIG RIVER, OLD LEAD BELT, SOUTHEAST MISSOURI." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-325128.

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Richards, Barry Charles. "LEAD-ZINC-SILVER ORE DEPOSITS HOSTED BY CAMBRIAN CARBONATES IN THE SOUTHERN KOOTENAY ARC, SOUTHEAST BRITISH COLUMBIA." In Rocky Mountain Section - 69th Annual Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017rm-293200.

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Byers, W. A., G. Wang, M. Y. Young, and J. Deshon. "Simulation of PWR Crud." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-31265.

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Corrosion products deposit on Pressurized Water Reactor (PWR) fuel rod cladding surfaces and can create a number of issues including increased cladding temperature, elevated cladding corrosion, and the precipitation of boron species within the deposits. The deposits can also release and lead to increased radiation fields on system ex-core surfaces. These effects can vary widely from plant-to-plant. The amount of the deposits, commonly known as crud, is an important factor in determining the impact, but other parameters such as crud thickness, porosity, and composition are also thought to be important. The Electric Power Research Institute (EPRI) has sponsored a number of programs to better understand the characteristics of crud and its effects. Crud has been sampled by fuel scraping and by collecting suspended crud during operation and during fuel cleaning. The chemistry and structure of the crud was then characterized. These data were then used to create simulated crud in laboratory heated rod tests. These tests explored how the crud deposits affected heat transfer at the rod surface and the interaction between the crud and the simulated coolant. This paper discusses the nature of PWR crud and some of the practical aspects of crud simulation. Different approaches to laboratory crud creation will be reviewed, and the success in matching plant crud characteristics will be shown, with special emphasis on the production of crud for thermal conductivity measurement.
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Laycock, Robert G., and Thomas H. Fletcher. "Formation of Deposits From Heavy Fuel Oil Ash in an Accelerated Deposition Facility at Temperatures Up to 1206°C." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63724.

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Some industrial gas turbines are currently being fired directly using heavy fuel oil, which contains a small percentage of inorganic material that can lead to fouling and corrosion of turbine components. Deposits of heavy fuel oil ash were created in the Turbine Accelerated Deposition Facility (TADF) at Brigham Young University under gas turbine-related conditions. Ash was produced by burning heavy fuel oil in a downward-fired combustor and collecting the ash from the exhaust stream. The mass mean ash particle diameter from these tests was 33 microns. This ash was then introduced into the TADF and entrained in a hot gas flow that varied from 1088 to 1206°C. The gas and particle velocity was accelerated to over 200 m/s in these tests. This particle-laden hot gas stream then impinged on a nickel base superalloy metal coupon approximately 3 cm in diameter, and an ash deposit formed on the coupon. Sulfur dioxide was introduced to the system to achieve 1.1 mol% SO2 in the exhaust stream in order to simulate SO2 levels in turbines currently burning heavy fuel oil. The ash deposits were collected, and the capture efficiency, surface roughness, and deposit composition were measured. The deposits were then washed with deionized water, dried, and underwent the same analysis. It was found that, as the gas temperature increased, there was no effect on capture efficiency and the post-wash roughness of the samples decreased. Washing aided in the removal of sulfur, magnesium, potassium, and calcium.
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Reports on the topic "Lead deposits"

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Saunders, C. M., D. F. Strong, and D. F. Sangster. Carbonate-hosted lead-zinc deposits of western Newfoundland. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/134055.

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Saunders, C. M., and D. F. Strong. Assessment of Lead-Zinc Deposits of the western Newfoundland Carbonate Platform. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/120369.

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Sangster, D. F. Classification, distribution and grade-tonnage summaries of Canadian lead-zinc deposits. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/121058.

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Szumigala, D. J. Geology of the Tin Creek zinc-lead skarn deposits, McGrath B-2 Quadrangle, Alaska. Alaska Division of Geological & Geophysical Surveys, 1985. http://dx.doi.org/10.14509/1151.

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Abbott, J. G., S. P. Gordey, and D. J. Tempelman-Kluit. Setting of Stratiform, Sediment - Hosted Lead - Zinc Deposits in Yukon and northeastern British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132329.

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Gandhi, S. S., and J. A. Kerswill. Potential for Mississippi Valley-type lead-zinc deposits in the Artillery Lake area, Northwest Territories. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2013. http://dx.doi.org/10.4095/292467.

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Szumigala, D. J. Geology of zinc-lead skarn deposits in the Tin Creek area, McGrath B-2 Quadrangle, Alaska. Alaska Division of Geological & Geophysical Surveys, 1987. http://dx.doi.org/10.14509/2428.

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Paradis, S., and G. J. Simandl. Are there genetic links between carbonate-hosted barite-zinc-lead sulphide deposits and magnesite mineralization in southeast British Columbia? Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/306478.

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Ravenhurst, C. E., P. H. Reynolds, M. Zentilli, H. W. Krueger, and J. Blenkinsop. Strontium Isotopic Geochemistry of Lead - Zinc / Barite Deposits and Host Rocks of the Carboniferous Minas Sub - Basin, Nova Scotia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/129041.

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Huston, D. L., D. C. Champion, K. Czarnota, M. Hutchens, M. Hoggard, B. Ware, F. Richards, S. Tessalina, G. M. Gibson, and G. Cari. Lithospheric-scale controls on zinc-lead-silver deposits of the North Australian Zinc Belt: evidence from isotopic and geophysical data. Geoscience Australia, 2020. http://dx.doi.org/10.11636/134276.

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