The paper presents the results of study of pyrope from the Tsilma Uplift (northern Middle Timan) in Quaternary sediments and Middle Devonian terrigenous rocks of the Tsilma River basin. Based on their inner structure, chemical composition, microinclusions, and morphology, it is concluded that they are similar to pyrope from other Middle Timan regions. According to the chemical composition, most studied pyrope grains belong to a low-Cr lherzolite type, whereas some grains derived from wehrlite and dunite-harzburgite assemblages. No pyrope is identified from the diamond phase stability zone. Most pyrope grains were transported from their source for tens or hundreds of kilometers; however, the presence of weakly weared grains indicates the possible presence of a closer source. The microtubercular surface of most pyrope grains points to their supergene dissolution that is typical of pyrope from intermediate sedimentary reservoirs, e.g., the Middle Devonian terrigenous rocks of the Tsilma Uplift promising for diamond finding. More accurate forecast of diamond potential of the area requires specific exploration works with large-scale sampling of intermediate reservoirs and Quaternary alluvial complexes.
Keywords: pyrope, garnets, chromite, diamond-bearing properties, kimberlite diamond satellites, Tsilma Uplift, Middle Timan.
Funding. This work was supported by state contract of the Institute of Geology, Federal Research Center of the Komi Science Center UB RAS (Syktyvkar, Russia) “Fundamental Problems of Mineralogy and Mineral Formation, Minerals as Indicators of Petro- and Ore Genesis, Mineralogy of Ore Regions and Deposits of the Timan-Severouralsk Region and Arctic Territories” № 122040600009-2.
Acknowledgments. We are grateful to N.Kh. Khachaturyan for extraction of pyrope from heavy concentrates, E.M. Tropnikov, A.S. Shuisky, and V.A. Radaev for electron microscopic studies, staff of the Syktyvkar sector of the Karpinsky Russian Geological Research Institute, A.A. Bushenev from the State Budgetary Institution of the Komi Republic “Center for Protected Natural Areas”, and editors of the journal for the thorough editing the manuscript.
Conflict of interest. The authors declare that they have no conflicts of interest.
Authors contributions. A.A. Parkhachev, Yu.V. Glukhov, K.G. Parkhacheva, B.A. Makeev, M.Yu. Sokerin – analytical studies, writing and editing the manuscript; A.A. Parkhachev – field studies; B.A. Makeev – mathematical calculations of minimum components, plotting the combined Pavlov trigonogram.
For citation: Parkhachev A.A., Glukhov Yu.V., Parkhacheva K.G., Makeev B.A., Sokerin M.Yu. Pyrope of the Tsilema uplift (Middle Timan) as an indicator of primary diamond sources. Mineralogy, 2025, 11(4), 39–55. https://doi.org/10.35597/2313-545X-2025-11-4-3

Received 14.08.2025, revised 27.11.2025 accepted 04.12.2025

Andrey A. Parkhachev – Institute of Geology FRC Komi SC UB RAS; Karpinsky Russian Geological Research Institute (Syktyvkar sector), Syktyvkar, Russia; Andrey_Parhachev@karpinskyinstitute.ru
Yuri V. Glukhov –  Institute of Geology FRC Komi SC UB RAS, Syktyvkar, Russia; Glukhov@geo.komisc.ru
Ksenia G. Parkhacheva – Institute of Geology FRC Komi SC UB RAS, Syktyvkar, Russia; ksparhacheva@yandex.ru
Boris A. Makeev –  Institute of Geology FRC Komi SC UB RAS, Syktyvkar, Russia; makboris@mail.ru
Mikhail Y. Sokerin – Institute of Geology FRC Komi SC UB RAS, Syktyvkar, Russia; sokerin@geo.komisc.ru

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