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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">35065</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2023-24-1-95-104</article-id><article-id pub-id-type="edn">CTEBGK</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Image processing for ASTER remote sensing data to map hydrothermal alteration zones in East Kazakhstan</article-title><trans-title-group xml:lang="ru"><trans-title>Обработка данных дистанционного зондирования ASTER для картирования зон гидротермальных изменений в Восточном Казахстане</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2946-7144</contrib-id><contrib-id contrib-id-type="spin">1929-6130</contrib-id><name-alternatives><name xml:lang="en"><surname>Mahmoud</surname><given-names>Hamza A.</given-names></name><name xml:lang="ru"><surname>Махмуд</surname><given-names>Хамза Адель</given-names></name></name-alternatives><bio xml:lang="en"><p>master's student, Department of Subsoil and Petroleum Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>магистрант, департамент недропользования и нефтегазового дела, Инженерная академия</p></bio><email>1032205919@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4691-4855</contrib-id><contrib-id contrib-id-type="scopus">57215413670</contrib-id><contrib-id contrib-id-type="spin">4919-8300</contrib-id><name-alternatives><name xml:lang="en"><surname>Karelina</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Карелина</surname><given-names>Елена Викторовна</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD of Geology, Associate Professor of the Department of Mineral Developing and Oil &amp; Gas Business, Academy of Engineering</p></bio><bio xml:lang="ru"><p>кандидат геолого-минералогических наук, доцент департамента недропользования и нефтегазового дела, Инженерная академия</p></bio><email>karelina-ev@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6594-0763</contrib-id><contrib-id contrib-id-type="spin">5882-5663</contrib-id><name-alternatives><name xml:lang="en"><surname>Markov</surname><given-names>Vladimir E.</given-names></name><name xml:lang="ru"><surname>Марков</surname><given-names>Владимир Евгеньевич</given-names></name></name-alternatives><bio xml:lang="en"><p>senior lecturer, Department of Mineral Developing and Oil &amp; Gas Business, Academy of Engineering</p></bio><bio xml:lang="ru"><p>старший преподаватель, департамент недропользования и нефтегазового дела, Инженерная академия</p></bio><email>markov-ve@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9153-6489</contrib-id><contrib-id contrib-id-type="scopus">57200068947</contrib-id><contrib-id contrib-id-type="spin">8780-8588</contrib-id><name-alternatives><name xml:lang="en"><surname>Diakonov</surname><given-names>Viktor V.</given-names></name><name xml:lang="ru"><surname>Дьяконов</surname><given-names>Виктор Васильевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Science in Geology, Professor</p></bio><bio xml:lang="ru"><p>доктор геолого-минералогических наук, профессор</p></bio><email>mdf.rudn@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9133-7562</contrib-id><contrib-id contrib-id-type="scopus">6506542626</contrib-id><contrib-id contrib-id-type="spin">2456-3030</contrib-id><name-alternatives><name xml:lang="en"><surname>Vikentyev</surname><given-names>Ilya V.</given-names></name><name xml:lang="ru"><surname>Викентьев</surname><given-names>Илья Владимирович</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Geology, leading researcher, Laboratory of Ore Deposits</p></bio><bio xml:lang="ru"><p>доктор геолого-минералогических наук, ведущий научный сотрудник, лаборатория рудных месторождений</p></bio><email>viken@igem.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">RUDN University</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Sergo Ordzhonikidze Russian State University for Geological Prospecting</institution></aff><aff><institution xml:lang="ru">Российский государственный геологоразведочный университет имени Серго Орджоникидзе</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт геологии рудных месторождений, петрографии, минералогии и геохимии РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-06-25" publication-format="electronic"><day>25</day><month>06</month><year>2023</year></pub-date><volume>24</volume><issue>1</issue><issue-title xml:lang="en">VOL 24, NO1 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 24, №1 (2023)</issue-title><fpage>95</fpage><lpage>104</lpage><history><date date-type="received" iso-8601-date="2023-06-26"><day>26</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Mahmoud H.A., Karelina E.V., Markov V.E., Diakonov V.V., Vikentyev I.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Махмуд Х.А., Карелина Е.В., Марков В.Е., Дьяконов В.В., Викентьев И.В.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Mahmoud H.A., Karelina E.V., Markov V.E., Diakonov V.V., Vikentyev I.V.</copyright-holder><copyright-holder xml:lang="ru">Махмуд Х.А., Карелина Е.В., Марков В.Е., Дьяконов В.В., Викентьев И.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0/legalcode</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/35065">https://journals.rudn.ru/engineering-researches/article/view/35065</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Porphyry copper deposits are accompanied by extensive aureoles of hydrothermally altered rocks which make it possible to detect them on satellite images in the absence of vegetation. The study is devoted to using the Earth’s remote sensing data, particularly, satellite images from the Japanese sensor ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer), which are used to identify areas that are promising for the discovery of porphyry copper deposits and ore occurrences within the copper belt of Kazakhstan. The analysis of numerous publications that offer various methods for processing ASTER images for the interpretation of hydrothermally altered rocks accompanying porphyry copper occurrences showed that the most effective method for this region is the Crosta technique. The Crosta technique, unlike other methods, does not use primary bands, but their combinations are obtained by the principal components analysis method. Thus, the combination of the results of the principal components analysis with the use of index images and analysis of the geological map made it possible to identify areas of hydrothermally altered rocks in the study area. The described technique helps to predict promising areas for porphyry copper mineralization of varying degrees of reliability, associated with their hydrothermal processing.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Медно-порфировые месторождения сопровождаются обширными ореолами гидротермально измененных пород, значительно превосходящих их по площади, которые позволяют обнаруживать их на космических снимках в условиях отсутствия растительности. Исследуется использование данных дистанционного зондирования Земли, в частности космических снимков японского сенсора ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer), для выделения участков, перспективных на обнаружение медно-порфировых месторождений и рудопроявлений в пределах медного пояса Казахстана. Анализ многочисленных публикаций, в которых предлагаются различные методы обработки снимков ASTER для дешефрирования гидротермально измененных пород, сопровождающих медно-порфировые рудопроявления, показал, что наиболее эффективным из них для данного района является метод Crosta. В отличие от других методов он использует не первичные полосы (band), а их комбинации, полученные методом главных компонент. Таким образом, сочетание результатов метода главных компонент с применением индексных изображений и анализа геологической карты позволило выделить области гидротермально измененных пород в районе исследований. На основании описанной методики определены прогнозные участки, перспективные на медно-порфировое оруденение различной степени достоверности, связанные с их гидротермальной переработкой.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ASTER satellite images</kwd><kwd>hydrothermal alteration rocks</kwd><kwd>principal component analysis</kwd><kwd>satellite images interpretation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>космоснимки ASTER</kwd><kwd>метод главных компонент</kwd><kwd>гидротермально измененные породы</kwd><kwd>дешифрирование космоснимков</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Haldar SK. Mineral exploration principles and applications. 2nd ed. Elsevier; 2018.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Yong G, Xining Z, Peter MA, Alfred S, Lianfa L. Geoscience-aware deep learning: a new paradigm for remote sensing. 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