Ключевые слова

2411-3336

2541-9404

Записки Горного института

Journal of Mining Institute

Санкт-Петербургский горный университет императрицы Екатерины ΙΙ

Empress Catherine II Saint Petersburg Mining University

TBOUJQ

pmi-16619

https://pmi.spmi.ru/pmi/article/view/16619

Геология

Geology

Prospects for rare earth element mineralization in the weathering crusts developed on granite-gneisses of the Souktal Plutonic Complex (Northern Kazakhstan)

Перспективы редкоземельной рудоносности кор выветривания по гранито-гнейсам Соуктальского плутонического комплекса (Северный Казахстан)

Junussov

Medet A.

Джунусов

М. А.

Junussov

Medet A.

medet.junussov@nu.edu.kz

0000-0002-1379-5952

Назарбаевский университет (Астана, Казахстан) Nazarbayev University (Astana, Kazakhstan)

Regmi

Kamal R.

Регми

К. Р.

Regmi

Kamal R.

kamal.regmi@nu.edu.kz

0000-0003-1207-9118

Назарбаевский университет (Астана, Казахстан) Nazarbayev University (Astana, Kazakhstan)

Klimova

Ekaterina V.

Климова

Е. В.

Klimova

Ekaterina V.

katya_kli@list.ru

0000-0002-9771-9518

Институт геологии и геохронологии докембрия РАН (Санкт-Петербург, Россия) Institute of Precambrian Geology and Geochronology RAS (Saint Petersburg, Russia)

Reznik

Aleksandr V.

Резник

А. В.

Reznik

Aleksandr V.

a-reznik@mail.ru

0000-0002-0077-3404

Институт горного дела им. Н.А.Чинакала СО РАН (Новосибирск, Россия) N.A.Chinakal Institute of Mining Siberian Branch RAS (Novosibirsk, Russia)

25 11 2025

2026

277 45 54 09 12 2024 02 07 2025 27 02 2026

2025

М. А. Джунусов, К. Р. Регми, Е. В. Климова, А. В. Резник

Medet A. Junussov, Kamal R. Regmi, Ekaterina V. Klimova, Aleksandr V. Reznik

Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)

This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)

https://pmi.spmi.ru/pmi/article/view/16619

Изучены уникальные образцы коры выветривания наиболее выветренных образцов профиля выветривания (30-43 м) из двух буровых скважин. Минеральный состав образцов представлен кварцем, каолинитом, микроклином, мусковитом и плагиоклазом, что определено с помощью поляризационного микроскопа и подтверждено рентгеноструктурным анализом. Образцы из коры выветривания по гранито-гнейсам Соуктальского плутонического комплекса Северного Казахстана подвергнуты последовательному извлечению редкоземельных элементов (РЗЭ). Содержание РЗЭ оценивалось методом масс-спектрометрии с индуктивно-связанной плазмой (ICP-MS) после двухступенчатой процедуры последовательного выщелачивания растворами хлорида гидроксиламиния и гидроксида натрия (0,2 моль NH2OH⋅HCI и 1 моль NaOH). Эксперименты по последовательному выщелачиванию образцов позволили эффективно извлечь РЗЭ из коры выветривания Соуктальского плутонического комплекса. Эффективность извлечения (РЗЭ + Sc + Y) составляет от 4,1 до 7,8 г/т. Суммарное содержание легких РЗЭ составляет от 3,5 до 5,9 г/т, тяжелых – от 0,2 до 0,7 г/т. Результаты изучения образцов из коры выветривания по гранито-гнейсам позволяют отнести объект к ионно-адсорбционному типу месторождения РЗЭ коры выветривания. Полученные результаты демонстрируют эффективность последовательного извлечения РЗЭ и свидетельствуют о перспективности изучаемой территории для месторождения РЗЭ. Ионно-адсорбционный тип месторождений РЗЭ является новым для Казахстана и может способствовать развитию промышленной отрасли.

This study investigates unique weathering crust samples from the most altered sections (30-43 m) of the weathering profile within the Souktal Plutonic Complex, Northern Kazakhstan. The samples, obtained from two drill cores, consist of quartz, kaolinite, microcline, muscovite, and plagioclase, as identified through polarized light microscopy and confirmed by X-ray diffraction analysis. Sequential extraction of rare earth elements (REE) was performed using inductively coupled plasma mass spectrometry (ICP-MS) following a two-step leaching procedure with hydroxylamine hydrochloride (0.2 mol NH2OH·HCl) and sodium hydroxide (1 mol NaOH) solutions. The extraction process effectively recovered REE, indicating their presence in an ion-exchangeable form, with total extraction rates (REE + Sc + Y) ranging from 4.1 to 7.8 ppm. The total light REE content varies from 3.5 to 5.9 ppm, while heavy REE content ranges from 0.2 to 0.7 ppm across all samples. Petrological and geochemical analyses suggest that the studied area represents an ion-adsorption-type REE weathered deposit. These findings enhance the understanding of ionic-adsorbed REE within weathering crusts and highlight the effectiveness of sequential extraction methods for REE determination. Moreover, the study suggests that this area holds promising potential as a future REE ion-adsorption site, contributing to the development of Kazakhstan’s national REE industry.

Ключевые слова редкоземельные элементы кора выветривания месторождения РЗЭ Соуктал Казахстан

Keywords rare earth elements weathering crust REE deposits Souktal Kazakhstan

Работа выполнена в рамках темы 064.01.00 (SPG) Назарбаевского университета и темы НИР ИГГД РАН FMUW 2025-0003 (FMUW 2022-0004).

The work was performed within the framework of topic 064.01.00 (SPG) of Nazarbayev University and the research topic of the IPGG RAS FMUW 2025-0003 (FMUW 2022-0004).

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