New data on ore mineralogy of the Ak-Sug porphyry Au-Mo-Co deposit (Northeastern Tuva)
M.V. Shadchin, G.I. Shvedov, V.A. Makarov, B.M. Lobastov, S.A. Silyanov, S.S. Serdyuk
New data on ore mineralogy of the Ak-Sug porphyry Au-Mo-Cu deposit (Northeastern Tuva) are presented as a result of study of ore composition using optical and scanning electron microscopy. Previously unknown minerals of Se (bohdanowiczite and berzelianite), Co (carrollite and Co-bearing pyrite), Bi (native bismuth, wittichenite, volynskite, and miharaite), Cu and Ag (mckinstryite and stromeyerite), W (scheelite), and U (brannerite) are found in ores of the deposit. The analysis of new mineral assemblages allowed us to significantly expand the list of minerals found at this deposit. The characterized minerals formed in a wide range of temperatures during several successive stages of ore formation: porphyry (carrolite and Co-bearing pyrite), epithermal and subepithermal (miharaite, volynskite, wittichenite, native bismuth, Se-bearing galena). Brannerite, berzelianite, bohdanowiczite, stromeyerite, mckinstryite, and scheelite formed at the late low-temperature stage.
Keywords: Ak-Sug deposit, Northeastern Tuva, porphyry Au-Mo-Cu deposits, ore mineralogy.
Funding. This work was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk krai, the Regional Science Foundation and Joint Stock Company «Yenisei Siberia Development Corporation» project no. 20-45-242903 «Geological-genetic model of the Ak-Sug deposit as a reference porphyry copper object of the East Sayany metallogenic province» and project no. 20-45-243001\20.
Acknowledments. We are grateful to the reviewer and editors of the journal for their numerous comments, which allowed us to improve the manuscript.
Conflict of interest. The authors declare that they have no conflicts of interest.
Author contribution. M.V. Shadchin – data interpretation, writing – original draft, visualization; G.I. Shvedov – conceptualization, investigation, writing – original draft, visualization, writing – review & editing; V.A. Makarov – writing – original draft, visualization, writing – review & editing; B.M. Lobastov – analytical work; S.A. Silyanov – analytical work, writing – original draft; S.S. Serdyuk– writing – review & editing. All authors approved the final version of the article before publication.
For citation: Shadchin M.V., Shvedov G.I., Makarov V.A., Lobastov B.M., Silyanov S.A., Serdyuk S.S. New data on ore mineralogy of the Ak-Sug porphyry Au-Mo-Co deposit (Northeastern Tuva). Mineralogy, 10(3), 32–51. DOI: 10.35597/2313-545X-2024-10-3-3
Received 11.03.2024, revised 13.05.2024, accepted 25.08.2024
M.V. Shadchin, Siberian Federal University, Institute of Non-Ferrous Metals, Krasnoyarsk, Russia; shamamrmr@gmail.com
G.I. Shvedov, Siberian Federal University, Institute of Non-Ferrous Metals, Krasnoyarsk, Russia;
V.A. Makarov, Siberian Federal University, Institute of Non-Ferrous Metals, Krasnoyarsk, Russia;
B.M. Lobastov, Siberian Federal University, Institute of Non-Ferrous Metals, Krasnoyarsk, Russia;
S.A. Silyanov, Siberian Federal University, Institute of Non-Ferrous Metals, Krasnoyarsk, Russia;
S.S. Serdyuk, Siberian Federal University, Institute of Non-Ferrous Metals, Krasnoyarsk, Russia
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