litosphereЛитосфераLITHOSPHERE (Russia)1681-90042500-302XA.N. Zavaritsky Institute of Geology and Geochemistry10.24930/2500-302X-2024-24-5-929-937litosphere-2151Research ArticleСтатьиArticlesИзотопы меди в минералах Михеевского золото-медно-порфирового месторождения (Южный Урал)Cu isotopes in minerals of the Mikheevskoe gold-copper-porphyry deposit (Southern Urals)ПрибавкинС. В.PribavkinS. V.

г. Екатеринбург, 620110, ул. Академика Вонсовского, 15

15 Academician Vonsovsky st., Ekaterinburg 620110

ОкуневаТ. Г.OkunevaT. G.

г. Екатеринбург, 620110, ул. Академика Вонсовского, 15

15 Academician Vonsovsky st., Ekaterinburg 620110

СолошенкоН. Г.SoloshenkoN. G.

г. Екатеринбург, 620110, ул. Академика Вонсовского, 15

15 Academician Vonsovsky st., Ekaterinburg 620110

Институт геологии и геохимии им. академика А.Н. Заварицкого УрО РАНРоссияA.N. Zavaritsky Institute of Geology and Geochemistry, uB RASRussian Federation202407112024245929937Copyright © Прибавкин С.В., Окунева Т.Г., Солошенко Н.Г., 20242024Прибавкин С.В., Окунева Т.Г., Солошенко Н.Г.Pribavkin S.V., Okuneva T.G., Soloshenko N.G.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.lithosphere.ru/jour/article/view/2151

Объект исследования. Минералы меди Михеевского золото-медно-порфирового месторождения Южного Урала. Цель. Получение первых данных об изотопном составе меди в минералах различных типов руд крупнейшего на Урале порфирового месторождения, их интерпретация. Методы. Определение величин изотопного отношения 65Cu/63Cu проводилось в ЦКП “Геоаналитик” ИГГ УрО РАН на мультиколлекторном масс-спектрометре с индуктивно связанной плазмой – Neptune Plus. Выполнен анализ 12 образцов из трех основных технологических типов руд месторождения. Результаты. Интервалы значений δ65Cu в минералах сульфидных руд (халькопирите, блеклой руде) составили –0.36…+0.25‰, рыхлых руд (борнит, халькопирит, халькозин, пирит) – –0.64…+0.68‰, окисленных руд (малахит, азурит) – –2.14…+0.30‰. Выводы: Отсутствие широких вариаций значений δ65Cu указывает на формирование месторождения в условиях ограниченного числа стадий гидротермального рудообразования, связанных с эволюцией единой гидротермальной системы. Полученные данные сопоставимы со значениями δ65Cu в месторождениях порфирового типа разных регионов мира. Они дополняют базу знаний по распределению изотопов меди в минералах рудных месторождений.

Research subject. Minerals of Cu from the Mikheevskoe gold-copper-porphyry deposit in the Southern Urals. Aim. To obtain preliminary data on the isotopic composition of Сu in minerals of various ore types from the largest porphyry deposit of the Urals followed by their interpretation. Methods. The 65Cu/63Cu isotope ratio values were determined using a multicollector inductively coupled plasma mass spectrometer Neptune Plus at the Research Center “Geoanalytik” (IGG of Ural Branch of the Russian Academy of Sciences). In total, 12 samples of three main technological ore types from this deposit were analyzed. Results. The δ65Cu values in the minerals of sulfide, friable, and oxidized ores ranged from –0.36 to +0.25‰ (chalcopyrite, fahlore), from –0.64 to +0.68‰ (bornite, chalcocite, pyrite), and from –2.14 to +0.30‰ (malachite, azurite), respectively. Conclusions: The absence of wide variations in δ65Cu values indicates the formation of the deposit under the conditions of a limited number of stages of hydrothermal ore formation, associated with the evolution of a single hydrothermal system. The obtained data agree well with the values of δ65Cu in porphyry-type deposits from different regions of the world. The conducted study contributes to the current knowledge on behavior of Cu-isotopes in minerals from ore deposits.

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The authors declare that there are no conflicts of interest present.