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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gscience</journal-id><journal-title-group><journal-title xml:lang="en">Mining Science and Technology (Russia)</journal-title><trans-title-group xml:lang="ru"><trans-title>Горные науки и технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-0632</issn><publisher><publisher-name>The National University of Science and Technology MISiIS (NUST MISIS)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/2500-0632-2023-07-130</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-691</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="en"><subject>BENEFICIATION AND PROCESSING OF NATURAL AND TECHNOGENIC RAW MATERIALS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОБОГАЩЕНИЕ, ПЕРЕРАБОТКА МИНЕРАЛЬНОГО И ТЕХНОГЕННОГО СЫРЬЯ</subject></subj-group></article-categories><title-group><article-title>Investigation of old waste dump composition of lean gold-bearing ores from the Golden Pride Project (GPP) mining operation in Nzega district, Tanzania</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование лежалых отвалов бедной золотосодержащей руды горнодобывающего предприятия Golden Pride Project (GPP) в районе Нзега, Танзания</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6206-0306</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ширима</surname><given-names>Дж.</given-names></name><name name-style="western" xml:lang="en"><surname>Shirima</surname><given-names>J.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ширима Джексон – аспирант.</p><p>регион Дар-эс-Салам</p></bio><bio xml:lang="en"><p>Jackson Shirima – PhD-Student, University of Dar es Salaam.</p><p>Dar es Salaam Region</p></bio><email xlink:type="simple">jackson1rustus@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3063-8550</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Викедзи</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Wikedzi</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Викедзи Альфонсе – кандидат технических наук, ведущий исследователь.</p><p>регион Дар-эс-Салам</p><p>Scopus ID 57189371148</p></bio><bio xml:lang="en"><p>Alphonce Wikedzi – Cand. Sci. (Eng.), Leading Researcher, University of Dar es Salaam.</p><p>Dar es Salaam Region</p><p>Scopus ID 57189371148</p></bio><email xlink:type="simple">alpho20012001@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6998-8120</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рассказова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rasskazova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рассказова Анна Вадимовна – кандидат технических наук, ведущий научный сотрудник.</p><p>Хабаровск</p><p>Scopus ID 36661516800; ResearcherID K-6384-2015</p></bio><bio xml:lang="en"><p>Anna V. Rasskazova – Cand. Sci. (Eng.), Leading Researcher, Mining Institute, Separate Division of Khabarovsk Federal Research Center of the Far Eastern Branch of the Russian Academy of Sciences.</p><p>Khabarovsk</p><p>Scopus ID 36661516800; ResearcherID K-6384-2015</p></bio><email xlink:type="simple">annbot87@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Университет Дар-эс-Салама<country>Танзания</country></aff><aff xml:lang="en">University of Dar es Salaam<country>United Republic of Tanzania</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Институт горного дела, обособленное подразделение Хабаровского федерального исследовательского центра Дальневосточного отделения Российской академии наук<country>Россия</country></aff><aff xml:lang="en">Mining Institute, Separate Division of Khabarovsk Federal research center of the Far Eastern branch, Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>04</day><month>04</month><year>2024</year></pub-date><volume>9</volume><issue>1</issue><fpage>5</fpage><lpage>11</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Shirima J., Wikedzi A., Rasskazova A.V., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ширима Д., Викедзи А., Рассказова А.В.</copyright-holder><copyright-holder xml:lang="en">Shirima J., Wikedzi A., Rasskazova A.V.</copyright-holder><license 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://mst.misis.ru/jour/article/view/691">https://mst.misis.ru/jour/article/view/691</self-uri><abstract><p>The search for alternative sources of useful minerals is a pressing issue. One such possible source is the processing of lean gold-bearing ores, which previously did not seem feasible to exploit for subsoil users, leading to their disposal in off-balance ore dumps. Processing these resources becomes economically viable as gold prices rise and processing technologies improve over time. This paper presents the elemental and mineralogical composition of lean gold-bearing ore dumps from the Golden Pride Project (GPP) mining operation in Tanzania’s Lihendo district. This area contains an old dump of lean gold-bearing ores, weighing approximately 1.4 million tons. Extracting valuable components from lean mineral raw materials is a current priority. Sampling was conducted to study the dumps. Boreholes were drilled to a depth of 1 m, covering a total sampling area of 20 ha; 18 samples, each averaging 3 kg in weight, were collected. The results of X-ray fluorescence analysis (XRF) indicated the presence of Fe, S, Si, Ca, Ca, Mn, Cu, Al, Cr, Ti, As, and Ag in the collected samples. X-ray diffraction (XRD) analysis revealed that the main minerals in the dumps are muscovite, kaolinite, quartz, montimorillonite, and goethite. The average gold grade in the selected samples is 0.72 g/t. Studies of the grain-size distribution and gold distribution by grain-size classes after ore grinding demonstrated that the majority of gold (74%) is in the −75 μm class. In the initial mineral material of the dumps, the share of the +30-50 mm grain-size class is 81%. The paper proposes potential methods for processing lean dumps of gold-bearing ores. One such methods involves crushing the dump material, separating the −75 μm class, and subjecting it to direct leaching or leaching using “carbon-in-pulp” technique. Heap leaching appears to be the most promising method for extracting gold from such dumps in terms of technical and economic feasibility. Positive experience has been reported in applying this process to ores of similar mineralogical type.</p></abstract><trans-abstract xml:lang="ru"><p>Поиск альтернативных источников полезных минералов является достаточно актуальной проблемой. Одним из таких возможных источников является переработка бедных золотосодержащих руд, переработка которых ранее не представлялась привлекательной для недропользователей, вследствие чего из них формировались отвалы забалансовой руды. Переработка этих ресурсов становится востребованной на фоне роста цен и уровня технологий с течением времени. В данной статье представлен элементный и минералогический состав бедных золотосодержащих отвалов горного предприятия Golden Pride Project (GPP) в Танзании, в районе «Лихендо». В данном районе находится старый отвал бедной золотосодержащей руды (масса составляет примерно 1,4 млн т). Извлечение ценных компонентов из бедного минерального сырья является актуальным направлением в настоящее время. Для опробования отвалов был произведён отбор проб. Глубина бурения скважин составила 1 м, общая площадь опробования – 20 га; было отобрано 18 проб средней массой 3 кг. Результаты рентгенофлуоресцентного анализа (РФА / XRF) показали, что в отобранных пробах присутствуют такие элементы, как Fe, S, Si, Ca, Mn, Cu, Al, Cr, Ti, As, Ag. Результаты рентгенофазового анализа (XRD) показали, что основными минералами в отвалах являются мусковит, каолинит, кварц, монтимориллонит и гетит. Среднее содержание золота в отобранных пробах составляет 0,72 г /т. Исследования гранулометрического состава и распределения золота по классам крупности после измельчения руды показали, что большая часть золота (74 %) находится в классе –75 мкм. В исходной минеральной массе отвалов доля класса крупности +30–50 мм составляет 81 %. В статье предложены возможные методы переработки бедных отвалов золотосодержащих руд. Одним из возможных методов переработки отвалов является измельчение минерального сырья, отделение класса −75 мкм и его прямое выщелачивание либо выщелачивание по технологии «уголь в пульпе». Наиболее перспективным с точки зрения технико-экономических показателей представляется метод кучного выщелачивания. Имеется положительный опыт применения данной технологии в отношении руд аналогичного минерального типа.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Golden Pride Project (GPP)</kwd><kwd>рентгенофазовый анализ</kwd><kwd>рентгенофлуоресцентный анализ</kwd><kwd>бедная золотосодержащая руда</kwd><kwd>характеристика руды</kwd><kwd>методы переработки</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Golden Pride Project (GPP)</kwd><kwd>X-ray phase analysis</kwd><kwd>X-ray fluorescence analysis</kwd><kwd>lean gold-bearing ore</kwd><kwd>ore characterization</kwd><kwd>processing methods</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">Araya N., Kraslawski A., Cisternas L.A. Towards mine tailings valorization: Recovery of critical materials from Chilean mine tailings. 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