Consistent crystallization conditions are estimated for postcollision Late Paleozoic–Early Mesozoic granitoids of the Yuzhny pluton in the northeastern part of the Taimyr Peninsula (Russia). The chemical composition of equilibrated amphiboles and plagioclase in granitoids points to a crystallization temperature of 680–760 °С, a pressure of 2.8–3.4 kbar, and the H2O content of melt of 3.5–4.5 wt. %. The content of TiO2 (1.8–3.9 wt. %) and Al2O3 (13.8–15.0 wt. %) of biotite are typical of rocks of mesoabyssal plutons. The amount of quartz in micropegmatitic aggregates (~33 % in oligoclase matrix and 43 % in K-feldspar matrix) and the composition of associated feldspars (the anorthite content does not exceed 10 %) indicate a general pressure of ~3 kbar. Metapelites from the contact halo contain a critical mineral assemblage consisting of cordierite, andalusite, quartz and staurolite, which corresponds to the lower limit of the staurolite stability field in metapelites indicating a crystallization pressure of 2–3 kbar. The studied granitoids crystallized at a moderate (mesoabyssal) depth of 7–11 km (within the field of skarn and some and albitite-greisen deposits) from H2O-depleted magma. These features are typical of barren granitoids, however, some late porphyry Cu-Mo mineralization can be associated with the Middle to Late Triassic small hypabyssal plutons.
Keywords: amphibole-plagioclase geothermobarometry, eutectic quartz-feldspar aggregates, Taimyr Peninsula, granitoids, metallogenic analysis, ore potential assessment, Yuzhny granitic pluton.
Funding. This work was supported by state contract no. 41915500 of the Federal Agency for Mineral Resources of the Russian Federation.
Acknowledgements. We are grateful to Cand. Sci. (Geol.-Mineral.) E.V. Pushkarev (Institute of Geology and Geochemistry UB RAS, Yekaterinburg, Russia) and Cand. Sci. (Geol.-Mineral.) E.N. Perova (St. Petersburg State University, St. Petersburg, Russia) for consultations, an anonymous reviewer for valuable recommendations, which allowed the imrpovement of the manuscript, and V.N. Kirillov and E.L. Gruzova (Karpinsky Geological Research Institute, St. Petersburg, Russia) for help in analytical studies.
Conflict of interest. The authors declare that they have no conflicts of interest.
Author contribution. Y.V. Kiselnikov – filed studies, optical microscopy, SEM-EDS analysis, geological interpretation, writing and editing of the manuscript; A.G. Shneider – field studies, fieldwork organization;
V.F. Proskurnin – field studies, general research management, editing of the manuscript. All the author approved the final version of the manuscript prior to publication.
For citation: Kiselnikov Yu.V., Shneider A.G., Proskurnin V.F. Crystallization conditions of granites of the Yuzhny pluton (Northeast Taimyr, Russia). Mineralogy, 2026, 12(1), 85–104. https://doi.org/10.35597/2313-545X-2026-12-1-5

Received 16.10.2025, revised 13.12.2025 accepted 02.02.2026

Yury V. Kiselnikov – Geologist, Karpinsky Geological Research Institute, St. Petersburg, Russia; yury.kiselnikoff@yandex.ru
Alexey G. Shneider – Leading Geologist, Karpinsky Geological Research Institute, St. Petersburg, Russia
Vasily F. Proskurnin – Doct. Sci. (Geol.–Mineral.), Head of the Department of North Siberia, Karpinsky Geological Research Institute, St. Petersburg, Russia

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