Early silurian age of skarns of the Ichkeulmes copper and gold deposit (Northern Kazakhstan): results U-PB (ID-TIMS) geochronological studies of garnet
- Authors: Tretyakov A.1, Degtiarev K.1, Stifeeva M.1, Salnikova E.B.1, Chepchev S.1, Кotov A.2, Plotkina U.V.2, Shatagin K.N.2, Kasenova N.2
-
Affiliations:
- Геологический институт РАН
- Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
- Issue: Vol 526, No 1 (2026)
- Section: GEOLOGY OF ORE DEPOSITS
- Submitted: 19.09.2025
- Accepted: 06.10.2025
- Published: 16.10.2025
- URL: https://journals.rcsi.science/2686-7397/article/view/309543
- ID: 309543
Cite item
Full Text
Abstract
Garnet crystals have been studied in the rocks of the Ichkeulmes copper and gold deposit located in the southwestern exocontact zone of the Seletinsky granite massif of the Krykkuduk complex. It has been established that garnet is represented by polychrome zonal grains and individual uniformly colored crystals. Pomegranate grains often have zonality due to the alternation of zones with different ratios of andradite and grossular components. U-Pb (ID-TIMS) geochronological studies have been performed for polychrome and individual garnet grains of green and brown colors and the Early Silurian (438 ± 1 million years) age of their crystallization has been substantiated, which is assumed to be the age of formation of the skarns of the Ichkeulmes deposit. The presence of solid-phase inclusions of minerals of the aikinite group in garnet, the formation of which is paragenetically related to gold mineralization, indicates the synchronicity of the processes of formation of the studied garnet and ore genesis.
Full Text

About the authors
Andrey Tretyakov
Геологический институт РАН
Author for correspondence.
Email: and8486@yandex.ru
ORCID iD: 0000-0002-1795-9715
SPIN-code: 1328-8304
к.г.-м.н., ведущий научный сотрудник, завлаб, Геологический институт РАН
Пыжевский пер. 7, Москва, 119017, РоссияKirill Degtiarev
Email: degtkir@mail.ru
Maria Stifeeva
Email: stifeeva.maria@yandex.ru
E. B. Salnikova
Email: katesalnikova@yandex.ru
ORCID iD: 0000-0002-9099-682X
SPIN-code: 1121-9021
Sergey Chepchev
Email: s_chepchev@kyzyltu.kz
Aleksandr Кotov
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: abkotov-spb@mail.ru
Russian Federation, Saint-Peterburg
U. V. Plotkina
Email: jplotkina@yandex.ru
ORCID iD: 0000-0001-6171-6051
SPIN-code: 9300-0049
Konstantin Nikolaevich Shatagin
Email: shat@igem.ru
Nazerke Kasenova
Email: nazeka_19.07.95zh@mail.ru
Supplementary files
