Thickness and thermal state of the lithospheric mantle beneath the yubileynaya pipe (Alakit-Markha kimberlite field, Siberian craton)
- Авторлар: Milaushkin M.V.1,2, Malkovets V.G.1,2, Gibsher A.А.1,2, Dymshits A.M.3,4, Yakovlev I.V.2, Pokhilenko N.P.1
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Мекемелер:
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
- PJSC “ALROSA”
- Institute of the Earth’s crust, Siberian Branch of the Russian Academy of Sciences
- Kola Science Centre of the Russian Academy of Sciences, Geological Institute
- Шығарылым: Том 520, № 1 (2025)
- Беттер: 129-136
- Бөлім: GEOPHYSICS
- ##submission.dateSubmitted##: 29.05.2025
- ##submission.dateAccepted##: 29.05.2025
- ##submission.datePublished##: 30.05.2025
- URL: https://journals.rcsi.science/2686-7397/article/view/294339
- DOI: https://doi.org/10.31857/S2686739725010149
- EDN: https://elibrary.ru/GVUCQV
- ID: 294339
Дәйексөз келтіру
Аннотация
The paper presents the results of a study on the chemical composition of chromdiopside xenocrystals from the concentrate of the heavy fraction of kimberlites from the Yubileinaya pipe. a reconstruction of the mantle paleogeotherm was achieved through the application of monomineral clinopyroxene geothermobarometry and the FITPLOT programme. The palaeogeotherm was found to correspond to a surface heat flux of 34.8 mW/m². The estimated thickness of the lithosphere beneath the Yubileinaya pipe is 230 km, with a diamond window interval of approximately 105 km (from 125 to 230 km). In order to facilitate a comparison of the palaeogeotherm, lithosphere and diamond window thicknesses beneath the Yubileinaya and Udachnaya pipes, the mantle palaeogeotherm beneath the Udachnaya pipe was reconstructed. The resulting values for the heat flux, lithosphere thickness, and diamond window under the Udachnaya pipe are 34.7 mW/m², 233 km, and 108 km, respectively. However, the diamondiferous content of the Yubileinaya pipe is approximately two times lower than that of the Udachnaya pipe kimberlites. Consequently, the observed difference in diamondiferousness may be related not only to the thickness of the sampled lithosphere and the diamond window, but also to other petrological parameters, such as the degree of manifestation of diamond-generating and diamond-destructive metasomatism.
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Авторлар туралы
M. Milaushkin
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; PJSC “ALROSA”
Хат алмасуға жауапты Автор.
Email: milaushkinmv@igm.nsc.ru
Ресей, Novosibirsk; Novosibirsk
V. Malkovets
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; PJSC “ALROSA”
Email: milaushkinmv@igm.nsc.ru
Ресей, Novosibirsk; Novosibirsk
A. Gibsher
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; PJSC “ALROSA”
Email: milaushkinmv@igm.nsc.ru
Ресей, Novosibirsk; Novosibirsk
A. Dymshits
Institute of the Earth’s crust, Siberian Branch of the Russian Academy of Sciences; Kola Science Centre of the Russian Academy of Sciences, Geological Institute
Email: milaushkinmv@igm.nsc.ru
Ресей, Irkutsk; Apatity
I. Yakovlev
PJSC “ALROSA”
Email: milaushkinmv@igm.nsc.ru
Ресей, Novosibirsk
N. Pokhilenko
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: milaushkinmv@igm.nsc.ru
Academician of the RAS
Ресей, NovosibirskӘдебиет тізімі
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