Academic literature on the topic 'Zinc deposits'

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Journal articles on the topic "Zinc deposits"

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Lien, Nguyen Thi, and Nguyen Van Pho. "Formation of secondary nonsulfide zinc ore in Cho Dien Pb-Zn deposits." VIETNAM JOURNAL OF EARTH SCIENCES 40, no. 3 (June 4, 2018): 228–39. http://dx.doi.org/10.15625/0866-7187/40/3/12615.

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In Viet Nam, non-sulfide zinc ore in the Cho Dien deposit has been exploited for a long time. Up to the present, zinc ore remains the major exploited ore in Cho Dien. There are numerous studies of Pb-Zn ore in Cho Dien. However, most of the studies have dedicated only to description of mineralogical and chemical composition of Pb-Zn ore. There has been no publication on this non-sulfide zinc ore. Based on the mineralogical studies, the content of Pb and Zn in groundwater determined by reflective microscope, SEM, EPMA and ICP-MS methods, the study explained the formation of secondary non-sulfide zinc ore in the Cho Dien deposit. Strong weathering process makes the upper part of ore bodies completely oxidized. Difference in geochemical behavior of lead (Pb) and zinc (Zn) in the oxidation process of Pb-Zn ore is the reason to form non-sulfide zinc ore in the Cho Dien deposit. Oxidation of primary Pb-Zn ore is mainly sphalerite, pyrite, galena minerals which creates a low pH environment and transforms of zinc from immobile (sphalerite - ZnS) to mobile (Zn2+) and retained in solution under acid pH conditions whereas lead has the tendency to form soluble minerals (anglesite, cerussite). The acid neutralization actions of the surrounding rocks make zinc precipitate, to form secondary non-sulfide zinc minerals.ReferencesAndreas Nuspl, 2009. Genesis of nonsulfide zinc deposits and their future utilization (www.geo.tu-frei berg.de/oberseminar/OS_09/Andreas_Nuspl.pdf.Boland M.B., et al., 2003. The Shaimerden supergene zinc deposit, Kazakhstan: Economic Geology, 98(4), 787-795.Chau N.D., Jadwiga P., Adam P., D.V. Hao, L.K. Phon, J. Paweł, 2017. General characteristics of rare earth and radioactive elements in Dong Pao deposit, Lai Chau, Vietnam, Vietnam J. Earth Sci., 39(1), 14-26.Dao Thai Bac, 2012. Characteristics and distribution law of lead-zinc metallogenic fomations in Viet Bac region. Doctoral thesis.Heyl A.V., Bozion C.N., 1962. Oxidized zinc deposits of the United States, Part 1. General Geology: U.S. Geological Survey Bulletin 1135-A.Hoa T.T., et al., 2010. By-products in lead-zinc and copper ores of Northeast Vietnam. J. Sci. of the Earth, 289-298 (in Vietnamese).Hoang Minh Thao, Tran Thi Hien, Dao Duy Anh, Pham Thi Nga, 2017. Mineralogical characteristics of graphite ore from Bao Ha deposit, Lao Cai Province and proposing a wise use. Vietnam J. Earth Sci., 39(4), 324-336.Jurjovec J., et al., 2002. Acid neutralization mechanisms and metal release in mine tailings: A laboratory column experiment: Geochimica et Cosmochimica Acta, 66, 1511-1523.Large D., 2001. The geology of non-sulphide zinc Deposits - an Overview: Erzmetall, 54(5), 264-276.Maria Boni, 2003. Nonsulfide Zinc Deposits: a new - (old) type of economic mineralization. Society for geology applied to mineral deposits (SGA) News, Number 15. https://www.e-sga.org/fileadmin/sga/newsletter/news15/art01.html.McPhail D.C., et al., 2003, The geochemistry and mobility of zinc in the regolith: in Roach, I.C., ed., Advances in Regolith, 287-291.Murray W. Hitzman, et al., 2003. Classification, genesis, and exploration guides for non-sulfide zinc deposits: Economic Geology, 98(4), 685-714.Nguyen V.P., 2013. Wet tropical wethering in Viet Nam. Natural Science and Technology Publisher.Nicola Mondillo, 2013. Supergene Nonsulfide Zinc-Lead Deposits: The Examples of Jabali (Yemen) and Yanque (Peru). Doctoral thesis.Nordstrom D.K., Alpers C.N., 1999. Geochemistry of acid mine waste. Review in Economic Geology, the environmental geochemistry of ore deposits/Eds. G.S.Plumlee, M.J. Logsdon. Part A: Processes, techniques, and health issues, 6A, 133-160.Reynolds N.A., et al., 2003. The Padaeng Supergene Nonsulfide Zinc Deposit, Mae Sod, Thailand. Economic Geology, 98(4), 773-785.Sangameshwar S.R., Barnes H.L., 1983. Supergene Processes in Zinc-Lead-Silver Sulfide Ores in Carbonates: Economic Geology, 78, 1379-1397.Stumm W., Morgan J.J., 1996. Aquatic Chemistry, Third Edition. John Wiley & Sons, New York, NY.Takahashi T., 1960. Supergene alteration of zinc and lead deposits in limestone: Economic Geology, 55, 1083-1115.Thornber M.R. and Taylor G.F., 1992. The mechanisms of sulphide oxidation and gossan formation, in: Butt, C.R.M., and Zeegers H., (Eds.)., Regolith exploration geochemistry in tropical and subtropical terrains, in Govett G.J.S., ed., Handbook of exploration geochemistry: Amsterdam, Elsevier, 4, 119-138.Tran Trong Hoa, 2005. Potential assessment of By- products in lead-zinc and copper deposits of Northeast Vietnam. Final report.Tran Tuan Anh, 2010. Studying accompanying component in the types of potential deposits of basic metals and precious - rare metals of north Viet Nam to improve the efficiency of mining and environmental protection. Final report. KC.08.24/06-10.Tran Tuan Anh, et al., 2011. Mineralogical and geochemical characteristics and forming conditions of lead - zinc deposits in Lo Gam structure, northern Vietnam. J. Sci. of the Earth, 33(3DB), 393-408 ( in Vietnamese).Vito Coppola et al., 2009. Nonsulfide zinc deposits in the Silesia - Cracow district, Southern Poland. Springer Link, 44, 559-580.Vito Coppola, et al., 2007. Non-sulfide zinc deposits in Upper Silesia, Southern Poland. Proceeding of the Ninth Biennial SGA Meeting, Dublin, 1401-1404.Williams P.A., 1990. Oxide zone geochemistry: Ellis Horwood Ltd., Chichester, UK, 286p.
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Stepien, Zbigniew, and Wojciech Krasodomski. "Effect of trace zinc amounts introduced in various chemical structures in diesel fuel on coke deposits of fuel injectors of a CI engine." International Journal of Engine Research 21, no. 5 (May 28, 2018): 755–65. http://dx.doi.org/10.1177/1468087418777175.

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The goal of the article was to carry out a comparative research on the propensity of a standard-class commercial diesel fuel, consistent with the requirements of the EN-590 standard, with zinc catalysts of various chemical structures introduced, to form deposits on the tips of fuel injectors of a compression ignition engine. Studies on structures of zinc carboxylic salts type dissolved in the fuel and dispersed zinc oxides/hydroxides type were planned. The influence of zinc dialkyldithiophosphates (ZDDP) on the deposit formation was not investigated because of their complex structure and inability to evaluate the additional impact of phosphates(V) on the deposit formation process. Studies of pre-prepared fuel samples without zinc and with various zinc contents of various origins, which may constitute trace impurities of diesel fuel, were carried out using a standardised engine test acc. to the general European CEC F-98-08 procedure, in which the amount of the engine power decrease was adopted as an evaluation criterion for the size of the deposits formed on the tips of fuel injectors. Also, an analysis of elemental composition of the coke deposits formed on the tips of fuel injectors of a Peugeot DW10B engine was carried out by the X-ray fluorescence method. In the results of the studies carried out, it was found that in the case of commercial diesel fuel used for the tests, none of the zinc compounds assumed as deposits precursors had a significant influence on the chemistry of the deposit formation process during combustion of the diesel fuel in the engine. The deposits being formed are characterised by practically the same chemical nature. However, differences were found in the case of amounts of deposits forming on the tips of the fuel injectors and their growth rate during the test.
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Hur, Do Haeng, Kyeong-Su Kim, Hee-Sang Shim, Jinsoo Choi, and Kyu Min Song. "Behavior of Zinc Incorporation into Fuel Deposits in Borated and Lithiated Water with Dissolved Zinc." Materials 13, no. 19 (September 28, 2020): 4317. http://dx.doi.org/10.3390/ma13194317.

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The objective of this study was to investigate the behavior of zinc incorporation into newly forming fuel deposits and pre-formed deposits in a simulated pressurized water reactor coolant including 1000 ppm of boron and 2 ppm of lithium at 328 °C. Zinc was incorporated into fuel deposits that were being newly nucleated and grown on nuclear fuel cladding tubes in a zinc-containing coolant. The zinc incorporation resulted in a decrease in the lattice constant of the deposits, which was attributed to the decrease in larger iron content and the corresponding incorporation of smaller zinc in the deposits. However, zinc incorporation was not found, even after the fuel deposits pre-formed before zinc addition were subsequently exposed to the 60 ppb of zinc coolant for 500 h.
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Narasimhamurthy, V., and L. H. Shivashankarappa. "Physico-Chemical Properties of Zn-Fe Alloy Deposits from an Acid Sulphate Bath Containing Triethanolamine." Journal of Advanced Chemical Sciences 6, no. 3 (December 15, 2020): 689–92. http://dx.doi.org/10.30799/jacs.226.20060301.

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The composition, properties, structure and morphology of electrodeposited Zn-Fe alloy deposits obtained from an acid sulphate bath containing triethanolamine have been investigated. A bath containing less zinc (20%) produced an alloy deposit with higher zinc content (80%), i.e. anomalous co-deposition process. The composition of alloy remained constant with pH of the plating bath and thickness of the alloy deposit. The cathodic current efficiency depends on plating variables. The shift in deposition potentials of Zn-Fe alloy is a chief cause in the co-deposition process to produce alloy of varying composition. Phase structure determination by X-ray diffraction studies showed a wide variety of inter metallic phases. Zn-Fe alloy showed a superior corrosion resistance than zinc coatings. An alloy containing greater than 40% Fe showed a good paintability. Hardness of the alloy deposits increased with increase in iron content in the alloy. Smooth, uniform and fine grained deposits were obtained for the Zn-Fe alloy containing 20% Fe.
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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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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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Sindhu, H. S., Sumanth Joishy, B. V. Rajendra, and P. D. Babu. "Influence of Precursor Solution Concentration on Structure and Magnetic Properties of Zinc Oxide Thin Films." Key Engineering Materials 724 (December 2016): 43–47. http://dx.doi.org/10.4028/www.scientific.net/kem.724.43.

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Zinc oxide thin films were deposited on glass substrate at a substrate temperature of 673K by spray pyrolysis method using different concentration of 0.0125M, 0.025M and 0.05M of Zinc acetate solutions. The effect of molar concentrations on structure, surface morphology and magnetic properties of ZnO films were investigated using x-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. All deposited films were polycrystalline in nature with hexagonal wurtzite structure having a preferential growth orientation along (101) plane. An improvement of crystallinity in the deposits with increasing concentration of sprayed solution was noticed. All deposit exhibit fibrous structure which increases with increase of precursor concentration solutions. At room temperature, all deposited films were shown diamagnetic character but when cooled to 5K, they have shown paramagnetic characteristics.
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Simicic, Milos, and Konstantin Popov. "Zinc electrodeposition from alkaline zincate solution by pulsating overpotentials." Journal of the Serbian Chemical Society 65, no. 9 (2000): 661–70. http://dx.doi.org/10.2298/jsc0009661s.

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It is well known that smooth zinc deposits cannot be obtained from alkaline zincate using constant overpotential and current rate. During prolonged metal deposition, spongy and dendritic deposits are formed. It has been shown that the deposits are less agglomerated in the case of square-wave pulsating overpotentials regime than the ones obtained in case of constant overpotential regime. This is explained in a semiquantitative way by two phenomena: selective anodic dissolution during overpotentials ?off? period and decreasing diffusion control. These effects is more pronounced at higher pause-to-pulse ratio. Increasing the pause-to-pulse ratio causes a reduction of the ratio between diffusion and activation overpotential, resulting in a more compact deposit. Confirmation of the proposed semiquantitative mathematical model was obtained by zinc electrodeposition onto a copper wire from a 0.1 M zincate solution in 1.0 M KOH at room temperature.
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Choulet, F., M. Buatier, L. Barbanson, R. Guégan, and A. Ennaciri. "Zinc-rich clays in supergene non-sulfide zinc deposits." Mineralium Deposita 51, no. 4 (October 6, 2015): 467–90. http://dx.doi.org/10.1007/s00126-015-0618-8.

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Jian, Long, Fu Ju Jia, and Yan Dao. "Geochemical Characteristics of Ore-Bearing Strata of Pb-Zn Deposits in the Sichuan-Yunnan-Guizhou Border Area in Southwest China." Advanced Materials Research 868 (December 2013): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.868.113.

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The Pb-Zn deposits (or points) with different ages of ore-bearing strata are counted in in the paper. Through discussing the lithology and elemental geochemistry in ore-bearing strata to explain the lead element and zinc element relate to strata and lithology, the author suggested the lead-zinc deposit mainly were exposed in specific stratum, considering the deposits was obviously was controlled by stratum and was greatly influenced by lithology. For this reason, combining with the comparative study of element abundances in rock, it has maily demonstrated the relevance of ore-forming elements.
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Dissertations / Theses on the topic "Zinc deposits"

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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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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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More, Andrew P. "Textural and microstructural studies of zinc sulfide and associated phases in certain base metal deposits." Thesis, Aston University, 1988. http://publications.aston.ac.uk/14382/.

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A textural and microstructural study of a variety of zinc sulfide-containing ores has been undertaken, and the possible depositional and deformational controls of textural and microstructural development considered. Samples for the study were taken from both deformed and undeformed zinc ores of the Central U.S. Appalachians, and deformed zinc ores of the English Pennines. A variety of mineralogical techniques were employed, including transmitted and reflected light microscopy of etched and unetched material, transmission electron microscopy and electron microprobe analysis. For the Pennine zinc sulfides, spectroscopic, x-ray diffraction and fluid inclusion studies were also undertaken. Optical and electron optical examination of the Appalachian material confirmed the suitability of zinc sulfide for detailed study with such techniques. Growth and deformation-related microstructures could be distinguished from specimen-preparation induced artifacts. A deformationally-mduced lamelliform optical anisotropy is seen to be developed in areas hosting a dense planar microstructure of {111} twin- and slip-planes. The Pennine zinc sulfide texturally records a changing depositional environment. Thus, for example, delicately growth- zoned crystals are truncated and cross-cut by solution disconformities. Fluid inclusion studies indicate a highly saline (20-25 wt. % equiv. NaCl), low temperature (100-150°C.) fluid. Texturally, two varieties of zinc sulfide can be recognised; a widely developed, iron- banded variety, and a paragenetically early variety, banded due to horizons rich in crystal defects and microscopic inclusions. The zinc sulfide takes the form of a disordered 3C-polytype, with much of the disorder being deformational in origin. Twin- and slip-plane fabrics are developed . A deformation-related optical anisotropy is seen to overprint growth-related anisotropy, along with cuprian alteration of certain {111} deformation planes.
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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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Winter, Lawrence Stephen. "The genesis of ‘giant’ copper-zinc-gold-silver volcanogenic massive sulphide deposits at Tambogrande, Perú : age, tectonic setting, paleomorphology, lithogeochemistry, and radiogenic isotopes." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/773.

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The ‘giant’ Tambogrande volcanogenic massive sulphide (VMS) deposits within the Cretaceous Lancones basin of northwestern Perú are some of the largest Cu-Zn-Au-Ag-bearing massive sulphide deposits known. Limited research has been done on these deposits, hence the ore forming setting in which they developed and the key criteria that permitted such anomalous accumulation of base-metal sulphides are not understood. Based on field relationships in the host volcanic rocks and U-Pb geochronology, the deposits formed during the early stages of arc development in the latest Early Cretaceous and were related to an extensional and arc-rift phase (~105-100 Ma, phase 1). During this time, bimodal, primitive basalt-dominant volcanic rocks were erupted in a relatively deep marginal basin. Phase 1 rhyolite is tholeiitic, M-type, and considered to have formed from relatively high temperature, small batch magmas. The high heat flow and extensional setting extant during the initial stages of arc development were essential components for forming a VMS hydrothermal system. The subsequent phase 2 (~99-91 Ma) volcanic sequence comprises more evolved mafic rocks and similar, but more depleted, felsic rocks erupted in a relatively shallow marine setting. Phase 2 is interpreted to represent late-stage arc volcanism during a waning extensional regime and marked the transition to contractional tectonism. The Tambogrande deposits are particularly unusual amongst the ‘giant’ class of VMS deposits in that deposition largely occurred as seafloor mound-type and not by replacement of existing strata. Paleomorphology of the local depositional setting was defined by seafloor depressions controlled by syn-volcanic faults and rhyolitic volcanism. The depressions were the main controls on distribution and geometry of the deposits and, due to inherently confined hydrothermal venting, enhanced the efficiency of sulphide deposition. Geochemical and radiogenic isotope data indicate that the rhyolites in the VMS deposits were high temperature partial melts of the juvenile arc crust that had inherited the isotopic signatures of continental crust. Moreover, Pb isotope data suggest the metal budget was sourced almost wholly from mafic volcanic strata. Therefore, unlike the implications of many conventional models, the felsic volcanic rocks at Tambogrande are interpreted to have only played a passive role in VMS formation.
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Korkalo, T. (Tuomo). "Gold and copper deposits in Central Lapland, Northern Finland, with special reference to their exploration and exploitation." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:951428108X.

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Abstract At least 30 gold deposits verified by means of one or more notable diamond drill hole results have been discovered in Central Lapland in the last 20 years, and these can be divided spatially into groups, between which the metal composition varies. The deposits contain varying amounts of sulphides and sulpharsenides as well as gold. Pyrite is the most common sulphide mineral in the gold deposits associated with volcanic rocks, and usually pyrrhotite in those associated with sedimentary rocks. The principal sulphide minerals in those connected with banded iron formations are pyrite and arsenopyrite. A separate group of formations consists of the palaeoplacer gold deposits associated with the molasse-like quartzites and conglomerates of Central Lapland. The iron oxide-copper-gold deposits of Central Lapland, which are a significant potential source of copper and gold, are mostly associated with skarn rocks at the eastern contact of the acidic intrusive rocks of Western Lapland and with skarn rocks occurring as interlayers in metavolcanic and metasedimentary rocks. The gold deposits that have led to actual mining activities in Central Lapland are Saattopora in Kittilä and Pahtavaara in Sodankylä. Apart from the Laurinoja iron oxide-copper-gold ore body in Kolari, copper concentrate has been produced from the Saattopora gold ore deposit and the Pahtavuoma copper ore deposit. Only one gold ore in Central Lapland is being actively exploited at present, that of the Pahtavaara mine, which was worked in 1995–2000 and reopened in 2003. The best starting point for successful gold ore exploration in Central Lapland can be achieved through a thorough knowledge of the deformation zones and their structures and alteration processes and the application of geochemical methods. Magnetic surveys can be of help in identifying and locating deformation zones of interest for exploration purposes and the majority of the associated shear zones and faults. Ore-critical zones usually feature graphite-bearing schists and iron sulphide-bearing sequences that can be traced by electrical methods and used as marker zones to verify the results of geological mapping. Geological, geophysical and geochemical techniques have been used in great diversity, and in particular till geochemistry and bedrock drilling have been methods by which the gold and copper deposits in Central Lapland have been discovered. A total of 7.6 million tonnes of gold and copper ores, including the Laurinoja iron oxide-copper-gold ore, were extracted in Central Lapland over the period 1982–2000. The resulting production of gold during this period was 10 800 kg, together with 21 000 tonnes of copper in concentrates and 4500 kg of silver. The gold and copper ores have been concentrated by gravity separation and/or flotation, since the ores so far taken into production has been of the free milling type. However, a substantial proportion of the deposits in the area contain copper, nickel, cobalt and arsenic as well, in the form of sulphides or sulpharsenides, so that the achievement of commercially saleable products calls for the use of different leaching processes. Deposits have also been found in Central Lapland that have consisted partly or entirely of refractory gold ore in which gold is lying in the crystal lattice of pyrite and/or arsenopyrite, the processing of which by the above-mentioned methods is not economic, as it requires pre-treatment by bio-oxidation or pressure oxidation in order to convert the gold to a cyanide-soluble form.
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Gebert, James 1962. "The metallogeny of Cu-Ni and Zn-Cu-Pb deposits of the Frederickson Lake area, central Labrador Trough /." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63942.

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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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Lardeau, 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.

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L'etude petrogenetique des minerais de chessy-les-mines a permis de preciser la nature de la mineralisation et l'etude des deformations, de retracer l'evolution geologique complexe. Il est apparu que les metamorphismes ont amene une homogeneisation et une purification chimique des mineraux du minerai alors que leur recristallisation lors de la mise en place du granite a entraine un rajeunissement chimique. Cette approche petrogenetique et geochimique renforce la parente genetique entre chessy-les-mines et saint bel
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Neder, Renato Dantas. "Depositos de sulfeto maciço associados a rochas vulcanicas : o caso do deposito Zn-Pb do Expedito, Aripuana, MT, Brasil." [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287171.

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Orientador : Bernardino Ribeiro de Figueiredo
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociencias
Made available in DSpace on 2018-08-01T16:01:19Z (GMT). No. of bitstreams: 1 Neder_RenatoDantas_D.pdf: 4565799 bytes, checksum: 6470a7bb9ede00a82da67c1352765e52 (MD5) Previous issue date: 2002
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Books on the topic "Zinc 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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W. Dan Hausel. Copper, Lead, Zinc, Molybdenum and Associated Metal Deposits of Wyoming. [Laramie, Wyo.]: Wyoming State 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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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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Minerals, Canada. Mine Reserves and Currently Promising Deposits: Gold, Silver, Lead, Zinc, Copper, Nickel, Molybdenum. S.l: s.n, 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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Book chapters on the topic "Zinc deposits"

1

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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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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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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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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Sangster, Donald F. "Breccia-Hosted Lead—Zinc Deposits in Carbonate Rocks." In Paleokarst, 102–16. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4612-3748-8_5.

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Wellmer, F. W., and E. J. Reeve. "The Toqui Zinc-Lead-Copper-Silver Deposits, Aysén Province, Chile." In Stratabound Ore Deposits in the Andes, 473–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_36.

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Cedillo, E. "Stratabound Lead-Zinc Deposits in the Jurassic Chaucha Formation, Central Peru." In Stratabound Ore Deposits in the Andes, 537–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_42.

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Gorzawski, H., L. Fontboté, C. W. Field, and R. Tejada. "Sulfur Isotope Studies in the Zinc-Lead Mine San Vicente, Central Peru." In Stratabound Ore Deposits in the Andes, 305–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_22.

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Sureda, R. J., and J. L. Martin. "El Aguilar Mine: An Ordovician Sediment-Hosted Stratiform Lead-Zinc Deposit in the Central Andes." In Stratabound Ore Deposits in the Andes, 161–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_10.

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Conference papers on the topic "Zinc deposits"

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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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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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Appold, Martin S. "ORIGIN OF HYPOGENE NON-SULFIDE ZINC DEPOSITS: EVIDENCE FROM THE VAZANTE (BRAZIL), FLINDERS RANGES (AUSTRALIA), AND STAR (ZAMBIA) DEPOSITS." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-300617.

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Seong, B. G., S. Y. Hwang, M. C. Kim, and K. Y. Kim. "Observation on the WC-Co Coating Used in a Zinc Pot of a Continuous Galvanizing Line." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p1159.

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Abstract A continuous galvanizing line (CGL) has a zinc pot, which is filled with molten zinc for zinc coating. In a zinc pot there are pot rolls to guide steel strip. Usually WC-Co thermal sprayed coatings are used for protection of the pot rolls from severe corrosion by molten zinc. Authors analyzed WC-Co coatings used in a zinc pot of a CGL for 33 and 56 days. On the surface of a WC-Co coated roll, many kinds of deposits were observed including top dross, Fe2Al5 inter-metallic compound, which might induce dross defect on the surface of galvanized steel. Diffusion depth of zinc into the WC-Co coating used for 33 days was only within 10µm but some areas were severely attacked along cracks within the coating layer. Usually molten zinc contains small amount of aluminum about 0.12 - 0.2%. Through SEM study, we observed that not only zinc but also aluminum diffused into the WC-Co coating after service in the zinc pot for 56 days. Al-Fe rich layers were observed on the surface of the spray coating for some cases. The phase of those layers might be Fe2Al5 since their chemical compositions are similar to Fe2Al5 top dross.
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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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Kryk, Holger, Ulrich Harm, and Uwe Hampel. "Corrosion of Hot-Dip Galvanized Containment Installations: A Potential Cause for Thermal-Hydraulic Effects After LOCA in PWR?" In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60273.

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Generic investigations regarding the influence of corrosion processes of hot-dip galvanized PWR containment installations on strainer clogging as well as on the coolant chemistry and possible resulting in-core effects are carried out within joint research projects of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), TU Dresden (TUD) and Zittau-Görlitz University of Applied Sciences (HSZG). Lab-scale experiments at HZDR and TUD are focused on elucidation of physico-chemical corrosion and precipitation processes as well as resulting clogging effects. Results of generic experiments in a lab-scale corrosion test facility suggest that there is a multi-stage corrosion process. The first stage comprises dissolution of the zinc layer in the coolant forming zinc ions and in turn affecting the coolant chemistry. During the second stage, the base material (steel) corrodes forming insoluble corrosion particles, which can subsequently lead to accelerated clogging of fiber-laden strainers within a few hours. The main influences on corrosion were identified as impact of the coolant jet onto the corroding surface, water chemistry and zinc surface / coolant volume ratio. Furthermore, retrograde solubility of zinc corrosion products in boric acid containing coolants with increasing temperature was observed. Thus, formation and deposition of solid corrosion products cannot be ruled out if zinc containing coolant is heated up during its recirculation into hot downstream components (e.g. hot-spots in core). Corrosion experiments, which included formation of corrosion products at a heated cladding tube, proved that zinc, dissolved in the coolant at low sump temperatures, turns into solid deposits of zinc borates when contacting heated zircaloy surfaces. Due to alternating heating and cooling of the coolant during sump recirculation operation, a cycle of zinc corrosion and zinc borate precipitation may be initiated, which may eventually influence the thermal hydraulics in downstream components during the post-LOCA stage. The results obtained at lab-scale were confirmed by corresponding experiments in semi-technical test facilities of the project partner HSZG. Based on the experimental results, water chemical measures were tested to reduce corrosion and/or zinc borate precipitation effects.
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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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Jordan, M. M., K. Sjursaether, M. C. Edgerton, and R. Bruce. "Inhibition of Lead and Zinc Sulphide Scale Deposits Formed during Production from High Temperature Oil and Condensate Reservoirs." In SPE Asia Pacific Oil and Gas Conference and Exhibition. Society of Petroleum Engineers, 2000. http://dx.doi.org/10.2118/64427-ms.

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Weyer, K. U., and D. H. Adams. "Regional Groundwater Dynamics as a Cause for the Genesis of the Pine Point MVT Lead-Zinc Ore Deposits." In First EAGE / TNO Workshop. Netherlands: EAGE Publications BV, 2015. http://dx.doi.org/10.3997/2214-4609.201412336.

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Reports on the topic "Zinc deposits"

1

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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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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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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