Relevant bibliographies by topics / Ore petrology

Academic literature on the topic 'Ore petrology'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Ore petrology"

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Böhnel, H., J. F. W. Negendank, and J. Urrutia-Fucugauchi. "Palaeomagnetism and ore petrology of three Cretaceous-Tertiary batholiths of southern Mexico." Neues Jahrbuch für Geologie und Paläontologie - Monatshefte 1988, no. 2 (February 1, 1988): 97–127. http://dx.doi.org/10.1127/njgpm/1988/1988/97.

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Trunilina, V. A., and S. P. Roev. "Petrology and Ore Content of Magmatic Formations of the Ukachilkan Ore Field (Northeast Yakutia)." ARCTIC AND SUBARCTIC NATURAL RESOURCES 23, no. 1 (2018): 16–29. http://dx.doi.org/10.31242/2618-9712-2018-23-1-16-29.

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Petrova, Natalia S., Natalia Yu Denisova, and Aliaksei V. Kirykovich. "Microfabric characteristics of potash ore of the Pripyat potash-bearing basin." Journal of the Belarusian State University. Geography and Geology, no. 1 (June 20, 2019): 82–94. http://dx.doi.org/10.33581/2521-6740-2019-1-82-94.

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The requirements of complex subsoil use are increasing in the Pripyat potash-bearing basin: potash ore of new technologic types, with lower contents of useful components, increased concentrations of harmful impurities. Using all complex of quality indicators assessment of natural types of potash ore is undoubtedly prioritized by characteristic of potash deposits. The study of structural and textural features and composition of potash deposits has been given attention since the time of discover of the Starobin deposit. Systematic study of salt rock petrology has been started after the discovery of the Starobin deposit. Until now in the petrology, there is no recognized rational genetic classification of the structures of salt rocks being potash (potassium-magnesium) ore. The name of certain structure is based on the secondary features that are brightly expressed, color or similarity with different objects. The aim of the present work is an element recognition of the primary sedimentary features of rocks, systematization of primary and secondary characteristics and their typification according to petrochemical parameters. In the article the main microfabric types of potash ore that are typical for the deposits of red-colored and mottled hypersaline association of the Pripyat basin.
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Peng, Zhenan, Makoto Watanabe, Kenichi Hoshino, and Yasuhiro Shibata. "Ore mineralogy of tin-polymetallic (Sn-Sb-FePb-Zn-Cu-Ag) ores in the Dachang tin field, Guangxi, China and their implications for the ore genesis." Neues Jahrbuch für Mineralogie - Abhandlungen 175, no. 2 (December 1, 1999): 125–51. http://dx.doi.org/10.1127/njma/175/1999/125.

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Barnes, Steve, and Rais Latypov. "‘From Igneous Petrology to Ore Genesis’: an Introduction to this Thematic Issue ofJournal of Petrology." Journal of Petrology 56, no. 12 (December 2015): 2295–96. http://dx.doi.org/10.1093/petrology/egv081.

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Vladykin, N. V. "Potassium alkaline lamproite-carbonatite complexes: petrology, genesis, and ore reserves." Russian Geology and Geophysics 50, no. 12 (December 2009): 1119–28. http://dx.doi.org/10.1016/j.rgg.2009.11.010.

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Sen, Ranen, Arindam Sarkar, Snigdha Banerjee, and D. J. Spottiswood. "Characterisation of a complex lateritic ore by Mossbauer spectroscopy and its relevance in beneficiation of the ore." Neues Jahrbuch für Mineralogie - Monatshefte 2002, no. 7 (July 10, 2002): 319–34. http://dx.doi.org/10.1127/0028-3649/2002/2002-0319.

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Distler, V. V., V. V. Kryachko, and M. A. Yudovskaya. "Ore petrology of chromite-PGE mineralization in the Kempirsai ophiolite complex." Mineralogy and Petrology 92, no. 1-2 (November 13, 2007): 31–58. http://dx.doi.org/10.1007/s00710-007-0207-3.

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Hao, Hongda, Ian H. Campbell, Jeremy P. Richards, Eizo Nakamura, and Chie Sakaguchi. "Platinum-Group Element Geochemistry of the Escondida Igneous Suites, Northern Chile: Implications for Ore Formation." Journal of Petrology 60, no. 3 (February 1, 2019): 487–514. http://dx.doi.org/10.1093/petrology/egz004.

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Wang, Baode, Shuyin Niu, Aiqun Sun, Yan Xie, Yi Luo, Hailong Liu, and Yanhua Wang. "Endogenic Au-Ag polymetallic ore deposits and ore-bearing potentiality of strata." Chinese Journal of Geochemistry 29, no. 4 (October 28, 2010): 407–15. http://dx.doi.org/10.1007/s11631-010-0473-3.

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Dissertations / Theses on the topic "Ore petrology"

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Weis, Franz. "Oxygen Isotope Signatures of the Apatite-Iron Oxide Ore at Grängesberg." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-173031.

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The origin of apatite iron oxide ores, like the deposit at Grängesberg in the Bergslagen mining district, has been a subject of much discussion through the years. Some support a formation by hydrothermal fluids while others suggest that the ore is orthomagmatic, i.e. formed directly from a magma as suggested for the iron ore deposits of El Laco in Chile or the deposits in Kiruna, although also these two are still subjected to controversies. In 2009 sampling was done on drillcores through the Grängesberg ore. On these samples an oxygen isotope study on magnetite, quartz and whole rock samples from both the ore and its host rocks was conducted in order to obtain new knowledge about the ore forming processes. The data allowed modeling to simulate a possible origin by different magmas or hydrothermal fluids as well as a possible temperature of formation. In addition, the data set was compared to published oxygen isotope analyses of the possible magmatic iron ores of Kiruna and El Laco. The results of the Grängesberg analysis revealed that the ore in the area seems to have an origin from both magmatic and hydrothermal sources.
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Lindeberg, Tomas. "Indium Analysis and Small-scale Distribution in Sulphides from the Lindbom Prospect, Långban Area, Western Bergslagen Ore Province." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-196479.

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Indium is extensively used in LCD screens and solar cells. It is mainly produced as a byproduct during ore processing. With ever increasing demand for indium and most of the production being restricted to a few countries new sources for indium are needed. In Sweden, the westernmost Bergslagen is the only area, which is known to exhibit minerals with essential indium. The indium mineralisations at Långban, the Linbom prospect, which are studied in this bachelor’s thesis show several trends. The most notable is the copper indium trend seen in sphalerite. A likely substitution based on similar ionic radii and charges is Cu1++ In3+ ↔ 2Zn2+.Usually when cassiterite is associated with similar polymetalic indium bearing mineralisations as at Långban there is also high concentrations in cassiterite. This has previously not observed in Sweden, however during this project concentrations were indeed found in cassiterite.
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Pacanovsky, Aaron James. "Petrology of Gold Ore-Bearing Carbonates of the Helen Zone, Cove Deposit, Lander County, Nevada." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398682471.

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Piché, Mathieu. "Synthèse géologique et métallogenique du camp minier de Matagami, Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1991. http://theses.uqac.ca.

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Magnan, Martin. "La zone 87 du gisement d'or et de cuivre du lac Troilus : pétrographie et géochimie /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1993. http://theses.uqac.ca.

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Mekkaoui, Alaoui Moulay El Mustapha. "Caractérisation géochimique, pétrologique et métallogénique du gisement de sulfures massifs vocanogènes ANSIL /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1996. http://theses.uqac.ca.

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Andersson, Stefan. "Malmmikroskopering - en studie av sulfidmineral från Långbantrakten, Bergslagen, Sverige." Thesis, Uppsala universitet, Berggrundsgeologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-169481.

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De sulfidgruvor belägna i Långbantrakten som studien behandlar ligger i den västra delen av Bergslagen utanför Filipstad i Värmlands län. Opaka mineral (malm) från två mindre mineraliseringar, Näset och Getberget, har studerats med malmmikroskop och mikrosond för att beskriva mineralogin i området. Båda områdena domineras av olika (Cu-Fe-Pb-Zn)-sulfider, i Näset av kopparkis (CuFeS2), blyglans (PbS) och zinkblände ((Zn,Fe)S) och i Getberget av blyglans, zinkblände, kubanit (CuFe2S3) och magnetkis (Fe1-xS). I Näset finns en del mindre frekventa mineral, två olika faser av Co-pentlandit (en nickelrik och en utan nickel), gedigen Sb och Bi, (Ni-Co)-sulfid, breithauptit (NiSb) och magnetkis. Kubanit är även ett viktigt mineral som speglar mineraliseringens bildning. I Getberget finns liknande mindre frekventa mineral, kopparkis, nickelrik Co-pentlandit, gedigen Bi och Sb, silverglans (Ag2S), breithauptit och magnetit (Fe3O4). En sen utfällning av kubanit har skett i båda områdena och visar att mineraliseringarna har genomgått en liknande bildning och det stämmer även in på mineralogin, som även den är likartad.
The small sulphide mines, Näset and Getberget that have been investigated are located just outside the main mineralization of Långban, near the city of Filipstad in Värmland County. Opaque minerals have been studied in reflected light microscopy and with an electron microprobe analysis to describe the mineralogy. Both areas are dominated by various (Cu-Fe-Pb-Zn)-sulphides, Näset with chalcopyrite (CuFeS2), galena (PbS) and sphalerite ((Zn,Fe)S) and Getberget with, galena, sphalerite, cubanite (CuFe2S3) and pyrrhotite (Fe1-xS). The sulphides are also accompanied by various accessory minerals, in Näset by two different phases of Co-pentlandite (on rich in nickel and one without), native Sb and Bi, a (Ni-Co)-sulphide, breithauptite (NiSb) and pyrrhotite. Cubanite is also a very important mineral that reflects the formation of the mineralization. In Getberget there are similar accessory minerals, chalcopyrite, nickel rich Co-pentlandite, native Bi and Sb, acanthite (Ag2S), breithauptite and magnetite (Fe3O4). A late precipitation of cubanite has occurred in both areas, suggesting that the mineralizations has been formed in similar conditions. This also holds true when comparing the mineralogy, which also is similar.
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Blake, Kevin L. "The petrology, geochemistry and association to ore formation of the host rocks of the Kiirunavaara magnetite-apatite deposit, northern Sweden." Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321483.

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Stalder, Marcel. "Petrology and mineral chemistry of sulphide ores and associated metalliferous rocks of the Gamsberg Zn-Pb deposit, South Africa : implications for ore genesis and mineral exploration." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16072.

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Thesis (PhD)--University of Stellenbosch, 2004.
ENGLISH ABSTRACT: The Gamsberg Zn-Pb deposit is a metamorphosed and multiply deformed sediment-hosted base metal deposit in the central Namaqua Province of South Africa. The deposit is hosted by the Bushmanland Group, a late Palaeoproterozoic (2000-1600 Ma) supracrustal succession of quartzite, metapelitic schist and interbedded metavolcanic rocks. Mineralisation occurs within the central part of the Gams Formation, a heterogeneous sequence of metamorphosed metalliferous sediments and fine-grained organic-rich shales. The ore horizon is subdivided into a lower unit of metapelite-hosted ore, an intermediate layer of phosphorite-hosted ore, and an upper unit of banded garnet-apatite ore. The ore body is enveloped by unmineralised silicate-, carbonate- and oxide-facies metalliferous rocks, which originally represented mixtures of Fe-Mn-rich hydrothermal precipitates, authigenic carbonate, and variable concentrations of detrital material. Based on mineralogical and geochemical characteristics, the metalliferous host rocks are subdivided into iron formations, coticules, Fe-Mn silicates, impure marbles and barite/Ba-rich quartzite. Minerals of the Gams Formation mostly represent solid solution between the Fe and Mn end-members of garnet, pyroxene, pyroxenoid, amphibole, olivine, spinel and ilmenite. Calcium-rich rock types are a typical feature and characterized by the occurrence of manganoan calcite, clinopyroxene, andradite-rich garnet and titanite. A successive increase in the (Mn+Ca):Fe value of rocks and minerals is evident with increasing distance from the ore horizon. Amphibole is restricted to Fe-rich ore-bearing assemblages, whereas orthopyroxene, clinopyroxene, Fe-rich pyroxenoid and olivine are present in intermediate assemblages, and Mn-rich rhodonite and pyroxmangite in the most manganiferous assemblages. These variations are mimicked by an increase in the Mn:Fe value of coexisting garnet and ilmenite group minerals with increasing distance from ore. LA-ICP-MS analyses have been used to constrain the REE patterns of garnet and apatite. In the ore-body, these minerals display a positive Eu anomaly, which is interpreted to reflect a distinct hydrothermal signature. In contrast, garnet and apatite in unmineralised metalliferous rocks display nil or a negative Eu anomaly. Primary features of the Gams Formation, such as REE patterns, the banded nature of garnet-apatite ore, the presence of diagenetic apatite nodules, and the distribution of the redox-sensitive elements Ba and Mn have been used to constrain palaeo-environmental conditions. The results indicate that metapelitehosted ore has been deposited in a stratified ocean that was characterised by anoxic bottom waters and precipitation of Fe and Zn sulphides into organic matter-rich shales. These rocks were superceded by phosphorite-hosted ore, garnet-apatite ore and metalliferous host rocks that developed in a suboxic to oxic environment. The large size of the deposit, the internal lamination of the ores and the predominance of sphalerite and barite are consistent with a vent-distal setting and precipitation of the ore-forming constituents from dense and reduced hydrothermal fluids, which originated due to reactivation of dormant growth faults. Collectively, the geological evidence indicates that Gamsberg is bridging the gap betweenthe SEDEX and BHT classifications. The relationships demonstrate that differences between these two classes of sediment-hosted Zn-Pb deposits are predominantly related to environmental conditions within localised third order basins and not to fundamental differences in ore-forming processes.
AFRIKAANSE OPSOMMING: Die Gamsberg Zn-Pb afsetting is ‘n meerfasig vervormde en gemetamorfiseerde sedimentgesetelde onedel metaal afsetting in die sentrale Namakwa Provinsie van Suid Afrika. Die afsetting word geherberg deur die Boesmanland Groep, ‘n laat Paleoproterosoïse (2000 – 1600 Ma) bokors-opeenvolging van kwartsiet, metapelitiese skis en tussengelaagde metavulkaniese gesteente. Mineralisasie word gevind in the sentrale deel van die Gams Formasie. Die Gams Formasie is ‘n heterogene opeenvolging van gemetamorfiseerde metaalhoudende sediment en fynkorrelrige organiese skalie. Die erts horison word onderverdeel in ‘n onderste laag van metapeliet-gesetelde erts, n sentrale laag van fosforiet-gesetelde erts, en ‘n boonste laag van gebande granaat-apatiet erts. Die erts-liggaam word omhuls deur ongemineraliseerde silikaat-, karbonaat- en oksied-fasies metal-ryke rotse. Hierdie gesteentes word geinterpreteer as oorspronklike mengsels van Fe-Mn-ryke hidrotermale partikels, outigeniese karbonaat, en verskeie hoeveelhede detritale materiaal. Gebaseer op mineralogiese en geochemiese kenmerke word hierdie rotse onderverdeel in ysterformasies, „coticules“, Fe-Mn silikate, onsuiwer marmer en barite/Ba-ryke kwartsiet. Minerale van die Gams Formasie form meestal soliede oplossingsreekse tussen die Fe en Mn endlede van granaat, pirokseen, piroksenoid, amfibool, olivien, spinel en ilmeniet. Kalsium-ryke rots tipes is ‘n tipiese kenmerk van die Gams Formasie en word gekenmerk deur mangaan-ryke kalsiet, klinopirokseen, andradiet-ryke granaat en sfeen. Daar word ‘n stapsgewyse vergroting van die (Mn+Ca):Fe verhouding in gesteentes en minerale gevind met toeneemende afstand van die erts horison. Amfibool is beperk tot Fe-ryke ertsdraende gesteentes, ortopirokseen, klinopirokseen, Fe-ryke piroksenoid en olivien tot intermediêre gesteentes, en Mn-ryke rodoniet en piroksmangiet tot Mn-ryke gesteentes. Hierdie variasies gaan gepaard met vergroting van die Mn:Fe verhouding in granaat en ilmeniet-groep minerale met toeneemende afstand van die erts. LA-ICP-MS analises was gebruik om die skaars-aarde element patrone van granaat en apatiet te bepaal. In die erts-liggaam wys hierdie minerale ‘n positiewe Eu anomalie, wat geinterpreteerd word as ‘n hidrotermale kenmerk. In ongemineraliseerde gasheer gesteentes wys granaat en apatiet geen of ‘n negatiewe Eu anomalie. Primêre kenmerke van die Gams Formasie, soos skaars-aarde patrone, the gebande voorkoms van granaat-apatiet erts, die teenwoordigheid van diagenetiese apatiet knolle, en die verspreiding van die redox-sensitiewe elemente Ba en Mn, was gebruik om afleidings oor die paleo-omgewing te maak. Die resultate het gewys dat metapeliet-gesetelde erts afgeset was onder anoksiese bodem water deur presipitasie van Fe en Zn sulfiedes in organiese skalie. Hierdie erts gaan oor in fosforiet-gesetelde erts, granaat-apatiet erts en metaal-ryke gasheer gesteente wat in ‘n suboksiese tot oksiese omgewing ontstaan het. Die grootte van die afsetting, die interne gelaagdheid van die erts, asook die teenwoordigheid van sfaleriet en bariet dui op ‘n distale omgewing relatief tot die hidrotermale bron en presipitasie van die ertsuit digte en gereduseerde hidrotermale vloeistowwe, wat ontstaan het deur die heraktiveering van rustende groeiverskuiwings. Gesaamentlik bewys die geologiese kenmerke van Gamsberg dat gemetamorfiseerde SEDEX en Broken Hill-tipe mineralisasie binne die perke van ‘n enkele afsetting kan voorkom. Die geologiese verhoudings dui aan dat verskille tussen hierdie twee tipes van sedimentgesetelde afsettings meestal veroorsaak word deur omgewings-toestande binne in gelokaliseerde derde orde komme en nie deur fundamentele verskille in ertsvormende prosesse nie.
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Boucher, Stéphanie. "Ore Petrology and Alteration of the West Ansil Volcanic-hosted Massive Sulphide Deposit of the Noranda Mining Camp, Rouyn-Noranda, Quebec." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19786.

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The West Ansil deposit was the first Cu discovery in 25 years in the Noranda Central Camp. It has a combined indicated and inferred resource of ~1.2 Mt. Grades for the indicated resource are 3.4% Cu, 0.4% Zn, 1.4 g/t Au and 9.2 g/t Ag. The bulk of the resource is located in three massive sulphide lenses (Upper, Middle and Lower) that are entirely within the Rusty Ridge Formation above the Lewis exhalite. The mineralization in all three ore lenses consists of massive pyrrhotite + chalcopyrite + magnetite. Semi-massive sphalerite is restricted to the upper and lower parts of the Middle lens. Massive magnetite occurs at the center of the Upper and Middle lenses, where it replaces massive pyrrhotite. A striking feature of West Ansil is the presence of abundant colloform and nodular pyrite (+marcasite) in the massive sulphides. Late-stage replacement of massive pyrrhotite by colloform pyrite and marcasite, occurs mostly along the upper and lower contacts of the lenses.
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Books on the topic "Ore petrology"

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Raju, R. Dhana. Handbook of mineral exploration and ore petrology: Techniques and applications. Bangalore: Geological Society of India, 2009.

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Raju, R. Dhana. Handbook of mineral exploration and ore petrology: Techniques and applications. Bangalore: Geological Society of India, 2009.

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Raju, R. Dhana. Handbook of mineral exploration and ore petrology: Techniques and applications. Bangalore: Geological Society of India, 2009.

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Kapitonov, A. M. Fizicheskie svoĭstva gornykh porod Zapadnoĭ chasti Sibirskoĭ platformy. Krasnoi︠a︡rsk: Sibirskiĭ federalʹnyĭ universitet, 2011.

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Uiterwyk, B. H. The mineralogy, petrology, and geochemistry of the Prieska ore-body, Copperton, N.W. Cape Province. [Pretoria]: Republic of South Africa, Dept. of Mineral and Energy Affairs, Geological Survey, 1985.

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Subrahmanyam, V. Geochemistry, ore petrology, and genesis of gold mineralisation Kolar Greenstone Belt, Karnataka. [Calcutta]: Geological Survey of India, 1991.

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Badalov, S. T. Geokhimicheskie svoĭstva glavneĭshikh porodo- i rudoobrazui͡u︡shchikh ėlementov. Tashkent: Izd-vo "Fan" Uzbekskoĭ SSR, 1987.

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Zharikov, V. A. Izbrannye trudy: V dvukh tomakh. Moskva: Nauka, 2011.

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Krzyczkowska-Everest, Anna. Petrographic characteristics of the ore-bearing dolomites of the Górażdża beds, from Olkusz-Bolesław region (South Poland). Wrocław: Zakład Narodowy im. Ossolińskich, 1990.

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Empirical metallogeny: Depositional environments, lithologic associations, and metallic ores. Amsterdam: Elsevier, 1985.

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Book chapters on the topic "Ore petrology"

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Distler, V. V., A. D. Genkin, and O. A. Dyuzhikov. "Sulfide Petrology and Genesis of Copper-Nickel Ore Deposits." In Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits, 111–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70902-9_7.

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Gize, Andrew P., and David A. C. Manning. "Aspects of the Organic Geochemistry and Petrology of Metalliferous Ores." In Topics in Geobiology, 565–80. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2890-6_26.

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Wiszniewska, J., J. C. Duchesne, H. J. Stein, and M. O. Jędrysek. "Petrologic and isotope evidence for crustal source of ore-bearing Suwałki Anorthosites, Poland." In Mineral Deposits at the Beginning of the 21st Century, 635–38. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003077503-161.

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Hagni, Richard D. "Mineralogy and petrology of the lead-zinc-copper sulphide ores of the Viburnum Trend, southeast Missouri, U.S.A., with special emphasis on the mineralogy and extraction problems connected with cobalt and nickel." In Sulphide deposits—their origin and processing, 73–84. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0809-3_5.

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Kullerud, G. "Ore Petrology." In Encyclopedia of Physical Science and Technology, 411–33. Elsevier, 2003. http://dx.doi.org/10.1016/b0-12-227410-5/00972-8.

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"ore petrology." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 942. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_150929.

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Giże, Andrew P. "Organic Petrology Applied to Ore Deposits." In Ore Genesis and ExplorationThe Roles of Organic Matter. Society of Economic Geologists, 1997. http://dx.doi.org/10.5382/rev.09.03.

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René, Miloš. "Petrology, Geochemistry and Mineralogy of Greisens Associated with Tin-Tungsten Mineralisation: Hub Stock Deposit at Krásno–Horní Slavkov Ore District, Czech Republic." In Contributions to Mineralization. InTech, 2018. http://dx.doi.org/10.5772/intechopen.71187.

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Timothy Whitten, E. H. "A Solution To The Percentage -Data Problem In Petrology." In Computers in Geology - 25 Years of Progress. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195085938.003.0021.

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Statisticians have demonstrated the iriappropriateness of percentage data for petrological purposes except when transformations (e.g., log-ratios) are used to avoid inherent closure. Use of open variables for chemical data (perhaps weight per unit volume, g/100cc) would avoid this problem and permit traditional petrological work to be undertaken. Virtually all compositional data used in petrology are expressed as percentages (e.g., SiO2 wt%, muscovite vol%, Si wt%) or parts per million. Geologists depend on percentage and ppm data for studies of petrogenesis, spatial variability, etc. However, for over four decades, statisticians and mathematical geologists have given dire warnings about the dangers of drawing conclusions from percentage (or ratio) data. In consequence, petrological literature abounds with disclaimers about possible adverse effects that closure constraints (stemming from use of percentage data) may have. The abundant warnings have given little help to geologists for two reasons. First, the precise impact of closure on petrologic analyses and conclusions has been unclear or abstract. Second, a practical and realistic way of avoiding closure in petrology has not been apparent. Problem avoidance might involve either (a) applying statistical or mathematical transformations to standard percentage data to escape the inherent closure constraints that importune petrological conclusions, or (b) using meaningful petrological variables that are free of closure constraints so that traditional thinking and data manipulation can be used without problem. Transformation has been advocated for geological work by Aitchison (e.g., 1982); this approach, which presents considerable geological difficulties, is briefly reviewed here. No attention appears to have been given to the simple approach of using closure-free variables, which is the main subject of this paper. Closed data are compositional data that have a constant sum. Open data can have any value and do not have the constant-sum constraint. Standard rock chemical analyses are closed because the oxides (or elements, etc.), expressed as percentages, sum to 100; in consequence, at least one negative correlation between the variables must exist (Chayes, 1960). The problem of closure is obvious in two-variable systems. In a quartz-feldspar rock, for example, if quartz percentage increases, feldspar must decrease, so there is inherent negative correlation between the components.
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Lightfoot, Peter C. "Petrology and geochemistry of the Sudbury igneous complex." In Nickel Sulfide Ores and Impact Melts, 190–295. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-804050-8.00003-1.

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Conference papers on the topic "Ore petrology"

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Trunilina, V. A. "PETROLOGY AND ORE POTENTIAL OF GRANITOIDS FROM THE ISTEKH ORE FIELD (NORTHEASTERN VERKHOYANSK-KOLYMA MESOZOIDES)." In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/1.1/s01.055.

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Omarova, Gulnara. "PETROLOGY OF ORE-BEARING METASOMATITES OF GOLD DEPOSIT KOKKYIA (SOUTH KAZAKHSTAN)." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/11/s01.055.

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Abbas, Ikhwan Rasyidin Hadi, and Adi Maulana. "Petrology of ultramafic rocks from Pt. Sebuku iron lateritic ore (SILO) concession area, Sebuku Island, South Kalimantan, Indonesia." In THE PROCEEDINGS OF THE 4TH EPI INTERNATIONAL CONFERENCE ON SCIENCE AND ENGINEERING (EICSE) 2020. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0095501.

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Iacono-Marziano, Giada, Margaux Le Vaillant, Steve Barnes, Belinda Godel, Laurent Arbaret, Fabrice Gaillard, and Nicholas Arndt. "The role of assimilation and volatiles in the formation and metal enrichment of magmatic sulfide ores: constraints from experimental petrology and application to the Noril’sk-Talnakh ore deposits (Russia)." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7696.

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Dilles, John, Federico Cernuschi, Jaime Osorio, and John Proffett. "THE PETROLOGY OF WALL-ROCK ALTERATION ZONES IN PORPHYRY CU-MO-AU DEPOSITS: CONSTRAINTS ON THE TIMING, TEMPERATURE, AND PRESSURE CONDITIONS OF SULFIDE ORE FORMATION." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-378113.

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Qassabi, Hajir, Andika Putra Rafliansyah, Johnny Falla, and Ahmed Al-Yaaribi. "First Application in Oman of New Single Stage Retarded Sandstone Matrix Acidizing." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2022. http://dx.doi.org/10.2118/200297-ms.

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Abstract The objective of matrix acidizing in sandstone reservoirs using acid systems that contains Hydrofluoric acid (HF) is to widen the pore throats and spaces in order to increase the permeability around the wellbore and also to remove formation damage. One of the major disadvantages of this acid system is the secondary and tertiary reactions, which may end up with precipitations that damage the formation. Because of this, pumping sufficient pre- flush and post-flush volumes of Hydrochloric acid (HCl) is critical to prevent such damaging reactions. However, the placement of such fluids still are a concern in multiple opened layers or long open intervals zones. Stimulating sandstone reservoirs in the Southern fields of the Sultanate of Oman is very challenging, especially in those that exhibit relatively low permeability. These formations, based on petrology work, contains significant amount of clays and feldspars, which make it difficult in the designing process of the acid formulation. A new version of HF acid system was recently developed. It is specially formulated, so it does not require the addition of Hydrochloric acid (HCl) pre-flush. Because of this, it can be pumped as a single stage system. In addition, its higher reactivity allows deeper penetration and it has the ability to minimize secondary reactions and damaging precipitates. Lab testing work was conducted to ensure the effectiveness of this single stage acid system. The results were promising as they show a good improvement in the rock permeability. These results were encouraging to carry field trials in the sandstone reservoirs in Oman Southern fields. Up to now, it has been pumped in these type of sandstones for oil producer wells and for water injector wells. The actual treatment using this system showed increased oil productivity by higher than 60% and higher than 80% in water injectivity. This paper presents the testing, designing and pumping of the single stage acid system, as well as the comparison with the conventional HF acid system in Southern fields of Oman. It outlines the laboratory work and analysis done as well as the field trials.
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Maeder, James, Cameron Mueller-Harder, Victor Guevara, Alyssa McKanna, Isabel Koran, Blair Schoene, and Michael J. Jercinovic. "GENESIS OF IRON-OXIDE-APATITE DEPOSITS IN A COLLISIONAL OROGEN: A PETROLOGIC AND GEOCHRONOLOGIC STUDY OF MAGNETITE ORES IN THE NEW JERSEY HIGHLANDS." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-382601.

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Price, Jason B., and Paul D. Asimow. "CAN ONE MELT BE RESPONSIBLE FOR THE PETROLOGIC ZONES OBSERVED IN THE MT. LOWE ZONED INTRUSION, SAN GABRIEL MOUNTAINS, CALIFORNIA? INSIGHT FROM MELTS THERMODYNAMIC MODELING." In 112th Annual GSA Cordilleran Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016cd-274790.

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Reports on the topic "Ore petrology"

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Lane, L. S., K. M. Bell, and D. R. Issler. Overview of the age, evolution, and petroleum potential of the Eagle Plain Basin, Yukon. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/326092.

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New mapping, biostratigraphy, geochemistry, and organic petrology results have led to new insights into the structural evolution, depositional history, and resource potential of the Eagle Plain Basin. Apatite fission-track modelling resolves at least two distinct heating-cooling cycles and suggests that sediment was sourced from the east, as well as from the south. A recently identified marine-slope setting in the west of the basin represents a new petroleum play. Advances in understanding the age and depositional history of the Eagle Plain Group derive from new fossil localities, a new bentonite age, and detrital zircon data. Initiated in the Cenomanian, or possibly latest Albian, deposition continued until the late Maastrichtian, although post-Coniacian deposits may have been subsequently eroded, or bypassed across southern parts of the basin. New petroleum resource appraisals include new petroleum exploration-play concepts, as well as qualitative assessments of unconventional oil and gas potential.
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Peter, J. M., M. G. Gadd, C. Jiang, and J. Reyes. Organic geochemistry and petrology of sedimentary exhalative Pb-Zn and polymetallic hyper-enriched black shale deposits in the Selwyn Basin, Yukon. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328017.

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Paleozoic strata of the Selwyn Basin host sedimentary exhalative (SEDEX) Pb-Zn deposits, and age-correlative strata of the Richardson trough host polymetallic hyper-enriched black shale (HEBS) deposits. In both deposit types, organic matter is spatially and temporally associated with mineralization. We investigated the characteristics of organic matter in mineralization and unmineralized host rocks in the XY Central SEDEX deposit in the Howard's Pass district, and the Nick and Peel River HEBS deposits in the Richardson trough using Rock-Eval pyrolysis, organic petrography, and solvent extraction and gas chromatography mass spectrometry (GCMS) analysis of the soluble organic matter (SOM). All samples experienced extremely high thermal maturity (Tmax up to 599°C), indicating they contain low SOM. Rock-Eval parameters S1, S2, HI, and OI values are low. Total organic carbon (TOC) values are low for Nick and Peel River and are generally higher for XY Central. Residual carbon values are universally high. Mineral carbon values are low for deposits studied (one outlier). Pyrobitumen reflectance is mostly below 5.80%. Full-scan GCMS analyses of SOM reveal that most, if not all, high molecular weight hydrocarbons, including biomarkers, have been lost due to thermal cracking and many detected peaks are likely due to contaminants introduced during sampling.
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