Skarn-related gold-copper mineralization of the Baranchinskaya area (Gornyi Altai)

DOI:10.47765/0869-7175-2025-10007

Authors

  • S. G. KRYAZHEV
    Federal State Budgetary Institution “Central Research Institute of Geological Prospecting for Base and Precious Metals” (FSBI “TSNIGRI”), Moscow

    доктор геолого-минералогических наук, начальник отдела

  • S. S. DVURECHENSKAYA
    Federal State Budgetary Institution “Central Research Institute of Geological Prospecting for Base and Precious Metals” (FSBI “TSNIGRI”), Moscow

    кандидат геолого-минералогических наук, ведущий научный сотрудник  

  • A. V. OKULOV
    Federal State Budgetary Institution “Central Research Institute of Geological Prospecting for Base and Precious Metals” (FSBI “TSNIGRI”), Moscow

     кандидат геолого-минералогических наук, заместитель начальника отдела

  • S. I. FEDAK
    Federal State Budgetary Institution "All-Russian Geological Research Institute of A.P. Karpinsky" (Karpinsky Russian Geological Institute), St. Petersburg

     ведущий инженер

Keywords:

Gornyi Altai, Barancha, gold, skarns, axinite, datolite, okayamalite, fluid inclusions

Abstract

The composition and sequence of formation of skarn-related gold-copper mineralization of the Baranchinskaya area have been determined. The pyroxene-garnet skarns are intensely replaced by boron-containing vesuvianite that in turn is replaced by borosilicates in paragenesis with gold-sulfide mineralization. The borosilicates are represented by tourmaline, axinite, and datolite, as well as by okayamalite first found in Russia. Ore minerals are mainly represented by chalcopyrite, bornite, wittichenite, native bismuth, and electrum. The ore mineralization was formed by alkaline-chloride solutions in the temperature range of 385-330 °C at a pressure of about 1000 bar. The Karagu deposit in the Gornyi Altai is considered as the closest analogue.

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Published

2025-06-27

How to Cite

КРЯЖЕВ СЕРГЕЙ ГАВРИЛОВИЧ, ДВУРЕЧЕНСКАЯ СВЕТЛАНА СТЕПАНОВНА, ОКУЛОВ АЛЕКСЕЙ ВЯЧЕСЛАВОВИЧ, & ФЕДАК СТЕПАН ИВАНОВИЧ. (2025). Skarn-related gold-copper mineralization of the Baranchinskaya area (Gornyi Altai): DOI:10.47765/0869-7175-2025-10007. Otechestvennaya Geologiya, (2-3). Retrieved from https://og.tsnigri.ru/index.php/main/article/view/266

Issue

No. 2-3 (2025)

Section

Metalliferous and nonmetalliferous mineral deposits