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Postcollision Magmatism of Western Sector of the Mongol–Okhotsk Orogenic Belt: Oxidation Conditions and Metallogenic Zoning

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Abstract

The Transbaikal sector of the Mongol–Okhotsk orogenic belt displays a well-consistent geochemical and metallogenic zoning. The axial zone of the belt, which is controlled by the Mongol–Okhotsk suture zone from the north, is composed of reduced ilmenite-series rocks. Tin, tungsten, and rare-metal deposits and occurrences previously distinguished by S.S. Smirnov as a rare-metal belt are confined to the ilmenite-series rocks. The reduced rocks are framed from the north and south by oxidized magnetite-series rocks with chalcophile mineralization. The distribution zones of the ilmenite-series rocks correspond to anomalies with lower gravity and magnetic fields, whereas the magnetite-series oxidized rocks correspond to anomalies with higher gravity and magnetic fields.

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The work was carried out under the state assignments of the Kosygin Institute of Tectonics and Geophysics, Far East Branch, Russian Academy of Sciences.

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Correspondence to L. F. Mishin.

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Recommended for publishing by V. G. Sakhno

Translated by E. Maslennikova

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Mishin, L.F., Kirillova, G.L., Merkulova, T.V. et al. Postcollision Magmatism of Western Sector of the Mongol–Okhotsk Orogenic Belt: Oxidation Conditions and Metallogenic Zoning. Russ. J. of Pac. Geol. 13, 311–319 (2019). https://doi.org/10.1134/S1819714019040067

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