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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">geology</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Геология и разведка</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of higher educational establishments. Geology and Exploration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0016-7762</issn><issn pub-type="epub">2618-8708</issn><publisher><publisher-name>Sergo Ordzhonikidze Russian State University for Geological Prospecting</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32454/0016-7762-2019-3-31-42</article-id><article-id custom-type="elpub" pub-id-type="custom">geology-410</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МИНЕРАЛОГИЯ, ПЕТРОГРАФИЯ, ЛИТОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MINERALOGY, PETROGRAPHY, LITHOLOGY</subject></subj-group></article-categories><title-group><article-title>Оценка качества магнитных концентратов титановых руд Пижемского месторождения с позиции технологической минералогии</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the quality of the magnetic concentrates of the titanium ores at Pizhemsky deposit from the point of view of the technological mineralogy</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лютоев</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyutoev</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>54, Первомайская ул., Сыктывкар 167982.</p></bio><bio xml:lang="en"><p>54, Pervomajskaja St., Syktyvkar 167982.</p></bio><email xlink:type="simple">vlutoev@geo.komisc.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макеев</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Makeyev</surname><given-names>A. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>35, Старомонетный пер., Москва 119017.</p></bio><bio xml:lang="en"><p>35, Staromonetny lane, Moscow 119017.</p></bio><email xlink:type="simple">abmakeev@igem.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии Коми НЦ УрО РАН (им. Академика Н.П. Юшкина)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology of the Komi Science Center of the Ural Branch RAS (IG KOMI SC UB RAS)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт геологии рудных месторождений, петрографии, минералогии и геохимии РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry RAS (IGEM RAS)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>27</day><month>06</month><year>2019</year></pub-date><volume>0</volume><issue>3</issue><fpage>31</fpage><lpage>41</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лютоев В.П., Макеев А.Б., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Лютоев В.П., Макеев А.Б.</copyright-holder><copyright-holder xml:lang="en">Lyutoev V.P., Makeyev A.B.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.geology-mgri.ru/jour/article/view/410">https://www.geology-mgri.ru/jour/article/view/410</self-uri><abstract><p>Исследованы четыре магнитные фракции из мелких классов (0,05—0,125 мм) концентратов представительной технологической пробы, выделенные из пижемских титаноносных песчаников средней толщи малоручейской свиты: общая проба (Т-2) и три частные (Т-1 а, Ь, с), полученные из неё методом гравитационного разделения в тяжелой жидкости) в три плотностных интервала (3,3—3,5; 3,5—3,7; 3,7—3,9 г/см3). Показано, что магнитная фракция мелких продуктивных классов состоит в основном из псевдорутила, ильменита, сидерита и граната. С помощью нормативного пересчёта данных химических анализов, а также методов Мёссбауэровской спектроскопии, инфракрасного (ИК) поглощения и электронного парамагнитного резонанса (ЭПР), достоверно установлен фазовый состав железо-титановых фаз. Рассчитано соотношение псевдорутила, ильменита, сидерита и сопутствующих редких и редкоземельных минералов — монацита-куларита и циркона, накапливающихся в соответствующих гравитационных классах. Рекомендуется применение операций доводки концентратов (извлечение циркона и монацита) до операции обескремнивания, а также их очистки от сидерита.</p></abstract><trans-abstract xml:lang="en"><p>Four magnetic fractions of small classes concentrates (0,05—0,125 mm) of a representative technological sample have been separated from titanium-bearing medium thickness sandstones of Malorucheysky unit (Pizhemsky titanium deposit). They have been studied: general sample (T-2) and three partial (T-l a, b, c) ones obtained by gravitational separation in heavy liquid in three density intervals (3,3—3,5; 3,5—3,7; 3,7—3,9 g/cm3). It has been demonstrated that the magnetic fraction of the small productive classes consists mainly of pseudorutil, ilmenite, siderite (ironstone) and garnet. The phase composition of iron-titanium phases has been reliably established by the means of normative recalculation of chemical analysis data, as well as methods of Mossbauer spectroscopy, infrared (IR) absorption and electron paramagnetic resonance (EPR). The ratio of the pseudorutile, ilmenite, siderite and associated rare earth minerals monazite-kularite and zircon accumulated in the respective gravity classes, has been computed . It has been recommended to use the methods of recovery of the concentrates (extraction of zircon and monazite) before the operation of desilication, as well as their purification from siderite.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Пижемское титановое месторождение</kwd><kwd>гравитационные концентраты</kwd><kwd>Мёссбауэ-ровская спектроскопия</kwd><kwd>инфракрасное (ИК) поглощение</kwd><kwd>электронный парамагнитный резонанс (ЭПР)</kwd><kwd>рентгеноструктурный фазовый анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Pizhemsky titanium deposit</kwd><kwd>gravity concentrates</kwd><kwd>Mossbauer spectroscopy</kwd><kwd>infrared (IR) absorption</kwd><kwd>electron paramagnetic resonance (EPR)</kwd><kwd>x-ray phase analysis</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Власова М.В., Каказей Н.Г., Калиниченко AM., Литовченко А.С. 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