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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">10.17073/2500-0632-2025-03-386</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-936</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>GEOLOGY OF MINERAL DEPOSITS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ГЕОЛОГИЯ МЕСТОРОЖДЕНИЙ ПОЛЕЗНЫХ ИСКОПАЕМЫХ</subject></subj-group></article-categories><title-group><article-title>Geological and isotopic constraints on the copper ore formation in Ta Phoi area, Lao Cai province, Northwestern Vietnam</article-title><trans-title-group xml:lang="ru"><trans-title>Геологические и изотопные оценки условий образования медных руд в районе Та Фой, провинция Лао Кай, северо-западный Вьетнам</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1544-6470</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хунг</surname><given-names>Х. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Hung</surname><given-names>K. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хуонг Те Хунг – доктор наук (науки о Земле), преподаватель, кафедра поисково-разведочной геологии, Ханойский университет горного дела и геологии</p><p>г. Ханой</p><p>Scopus ID 36716173500</p></bio><bio xml:lang="en"><p>Khuong The Hung – Dr. Sci. (Earth Sci.), Lecturer, Department of Prospecting and Exploration Geology, Hanoi University of Mining and Geology</p><p>Hanoi</p><p>Scopus ID 36716173500</p></bio><email xlink:type="simple">khuongthehung@humg.edu.vn</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>Дак</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ngo</surname><given-names>D. X.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нго Суан Дак – доктор наук (науки о Земле), научный сотрудник</p><p>г. Ханой, Вьетнам</p></bio><bio xml:lang="en"><p>Ngo Xuan Dac – Dr. Sci. (Earth Sci.), Researcher, Vietnam Institute of Geosciences and Mineral Resources</p><p>Hanoi</p></bio><email xlink:type="simple">dacbmks@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Ханойский университет горного дела и геологии<country>Вьетнам</country></aff><aff xml:lang="en">Hanoi University of Mining and Geology, Vietnam<country>Viet Nam</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Вьетнамский институт наук о Земле и минеральных ресурсов<country>Вьетнам</country></aff><aff xml:lang="en">Vietnam Institute of Geosciences and Mineral Resources<country>Viet Nam</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>13</day><month>10</month><year>2025</year></pub-date><volume>10</volume><issue>3</issue><fpage>262</fpage><lpage>279</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Hung K.T., Ngo D.X., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Хунг Х.Т., Дак Н.С.</copyright-holder><copyright-holder xml:lang="en">Hung K.T., Ngo D.X.</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/936">https://mst.misis.ru/jour/article/view/936</self-uri><abstract><p>The Ta Phoi copper deposit, located in the northeastern Phan Si Pan zone, Northwestern Vietnam, is a significant site of Neoproterozoic Cu mineralization. Its distinct geological characteristics justify its investigations, especially in comparison to nearby IOCG Sin Quyen deposit. This study is aimed at clarifying the genesis, ore-forming conditions, and fluid evolution of the Ta Phoi deposit through an integrated approach combining geological, petrographic, geochemical, and isotopic data analysis. The research specifically employs U-Pb dating of sphene, sulfur isotope analysis, and fluid inclusion microthermometry to identify the age, origin, and physicochemical environment of the mineralization. Sphene U-Pb dating yielded concordant ages of 810.7 ± 4.6 Ma and 819.5 ± 2.0 Ma, indicating a Neoproterozoic mineralization event temporally linked to regional granodiorite and diorite intrusions. Sulfur isotope values (δ³⁴S = +2.2 to +3.1‰) suggest a magmatic origin for ore-forming fluids. Fluid inclusion data detected fluid temperatures ranging from 163.1°C to 410°C, fluid salinities of 2.1–16.25 wt% NaCl equiv., and formation pressures of 44–100 MPa at depths of 3.4–6.5 km. These results confirmed that the Ta Phoi deposit formed from medium- to high-temperature, magmatogene hydrothermal fluids in a subduction-related continental arc setting; it may represent a porphyry-related skarn or endoskarn system that developed in response to magmatic fluid migration along lithological contacts and faults. These findings provide new insights into the metallogenic framework of the Ta Phoi deposit and highlight its potential for further Cu exploration in Northwestern Vietnam.</p></abstract><trans-abstract xml:lang="ru"><p>Месторождение меди Та Фой (Ta Phoi), расположенное в северо-восточной части зоны Фан Си Пан на северо-западе Вьетнама, является важным объектом проявления неопротерозойской медной минерализации. Его отличительные геологические характеристики оправдывают его изучение, особенно в сопоставлении с близлежащим месторождением типа Fe-оксидных Au-Cu гидротермальных месторождений (IOCG) Синь Куен (Sin Quyen). Цель данного исследования – выяснить генезис, условия рудообразования и эволюцию флюидов месторождения Та Фой с помощью комплексного подхода, сочетающего анализ геологических, петрографических, геохимических и изотопных данных. В частности, в исследовании используются U-Pb датирование сфена, изотопный анализ серы и микротермометрия флюидных включений для определения возраста, происхождения и физико-химических условий формирования минерализации. Определение возраста сфена U-Pb методом дало согласующиеся возрасты 810,7 ± 4,6 млн лет и 819,5 ± 2,0 млн лет, что указывает на неопротерозойский возраст минерализации, совпадающий с возрастом региональных гранодиоритовых и диоритовых интрузий. Изотопный анализ серы (δ³⁴S = +2,2 до +3,1‰) указывает на магматическое происхождение рудообразующих флюидов. Данные по флюидным включениям показали, что температура флюидов колебалась от 163,1 до 410 °C, соленость флюидов составляла 2,1–16,25 вес. % в эквиваленте NaCl, а пластовое давление – 44–100 МПа на глубине 3,4–6,5 км. Эти результаты подтвердили, что месторождение Та Фой образовалось в результате воздействия магматогенных гидротермальных флюидов средней и высокой температуры в субдукционных условиях континентальной дуги; оно может представлять собой порфировую скарновую или эндоскарновую систему, которая сформировалась в результате миграции магматических флюидов вдоль литологических контактов и разломов. Эти результаты дают новое представление о металлогенической обстановке формирования месторождения Та Фой и подчеркивают потенциал дальнейшей разведки на медь в северо-западной части Вьетнама.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>медная руда</kwd><kwd>U-Pb определение возраста</kwd><kwd>сфен</kwd><kwd>металлогения</kwd><kwd>месторождение Та Фой</kwd><kwd>северо-западный Вьетнам</kwd></kwd-group><kwd-group xml:lang="en"><kwd>copper ore</kwd><kwd>U-Pb dating</kwd><kwd>titanite</kwd><kwd>metallogeny</kwd><kwd>Ta Phoi deposit</kwd><kwd>North-Western Vietnam</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">Evans A. M. Ore geology and industrial minerals: an introduction. 3rd Edition. Wiley-Blackwell.; 1993. 403 p.</mixed-citation><mixed-citation xml:lang="en">Evans A. M. Ore geology and industrial minerals: an introduction. 3rd ed. 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