TY - JOUR

T1 - Metamorphic conditions and raman spectroscopic carbonaceous material thermometry of host schists of olympiada and eldorado gold deposits (Yenisey Ridge, Russia)

AU - Sukhorukov, Vasiliy

AU - Volkova, Valeriya

AU - Nevolko, Peter

AU - Kozlov, Pavel

N1 - Funding Information: Funding: The fieldwork and Ar/Ar dating were done on the state assignment of IGM SB RAS and IGG UB RAS with the financial support of the Ministry of Science and Higher Education of the Russian Federation. The studying of metamorphic conditions and Raman spectroscopy of carbonaceous material were done with the financial support of the Russian Science Foundation (RSF), grant No. 21-77-20018 (Metamorphic complexes of the Yenisey Ridge: geological evolution, sedimentary parent rocks, and resource potential). Publisher Copyright: © 2021 by the authors.

PY - 2021/11

Y1 - 2021/11

N2 - Metamorphic processes play a key role in forming orogenic gold deposits. In this paper, we present new evidence that host schists of the two largest gold deposits of the Yenisey ridge (Russia) Olympiada and Eldorado underwent a single stage of metamorphism in contrast to surrounding blocks. This metamorphism is of moderate thermal gradient and belongs to the Barrovian type, which is typical for the collisional event in the time range 800-850 Ma. The new Ar/Ar age data presented in this paper and the review of magmatic and metamorphic events and ore-forming processes indicate that the most productive stage (gold-sulfide-quartz) correlates well in time with the regional metamorphism of the Barrovian type. This indicates that metamorphic processes can have a crucial role in forming gold deposits of the Yenisey ridge. Carbonaceous material thermometry indicates a wide range of obtained temperatures around 90-150 °C around the mean temperature for each sample. The highest temperatures are close to the peak metamorphic temperatures estimated by garnet-biotite thermometry.

AB - Metamorphic processes play a key role in forming orogenic gold deposits. In this paper, we present new evidence that host schists of the two largest gold deposits of the Yenisey ridge (Russia) Olympiada and Eldorado underwent a single stage of metamorphism in contrast to surrounding blocks. This metamorphism is of moderate thermal gradient and belongs to the Barrovian type, which is typical for the collisional event in the time range 800-850 Ma. The new Ar/Ar age data presented in this paper and the review of magmatic and metamorphic events and ore-forming processes indicate that the most productive stage (gold-sulfide-quartz) correlates well in time with the regional metamorphism of the Barrovian type. This indicates that metamorphic processes can have a crucial role in forming gold deposits of the Yenisey ridge. Carbonaceous material thermometry indicates a wide range of obtained temperatures around 90-150 °C around the mean temperature for each sample. The highest temperatures are close to the peak metamorphic temperatures estimated by garnet-biotite thermometry.

KW - Ar-ar

KW - Carbonaceousmaterial

KW - Gold deposits

KW - Metamorphism

KW - Raman spectra

KW - Yenisey ridge

UR - http://www.scopus.com/inward/record.url?scp=85120718947&partnerID=8YFLogxK

U2 - 10.3390/geosciences11110452

DO - 10.3390/geosciences11110452

M3 - Article

AN - SCOPUS:85120718947

VL - 11

JO - Geosciences (Switzerland)

JF - Geosciences (Switzerland)

SN - 2076-3263

IS - 11

M1 - 452

ER -