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Rare-Metal Granites of the Tigriny Massif (Sikhote-Alin): Geochemistry, Mineralogy and Evolution.

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Title: Rare-Metal Granites of the Tigriny Massif (Sikhote-Alin): Geochemistry, Mineralogy and Evolution.
Authors: Kruk, N. N.1,2 (AUTHOR) kruk@igm.nsc.ru, Gavryushkina, O. A.1,2 (AUTHOR) gavryushkina@gmail.com, Fedoseev, D. G.3 (AUTHOR) fedoseev@bk.ru, Orekhov, A. A.3 (AUTHOR), Kruk, E. A.1 (AUTHOR), Kasatkin, S. A.3 (AUTHOR), Mednikov, S. L.1 (AUTHOR)
Source: Russian Journal of Pacific Geology. Feb2022, Vol. 16 Issue 1, p42-61. 20p.
Subject Terms: *Geochemistry, *Mineralogy, *Granite, *Plagioclase, *Ore deposits, *Magmas, *Sodic soils
Abstract: This article describes the geological setting, geochemical features of rocks and the composition of the main minerals (micas, feldspars) of the granitoids of the Tigriny intrusion (Central Sikhote-Alin), associated with Sn-W mineralization. It is shown that the granitoids have high contents of fluorine and typomorphic trace elements and geochemically correspond to Li–F rare-metal granitoids. The evolution of rare-metal-granite magmas of the Tigriny massif was controlled by two main processes: fluid–magmatic interaction, which led to the formation of ultrapotassic pegmatoid granites, stockscheiders, and crystallization differentiation along the albite "trend," which led to the formation of lower-silica aluminous sodic melts of the final phase. The latter were likely emplaced in an open or partially open-system conditions and experienced intense degassing during crystallization, which resulted in the formation of late plagioclase granites with lower contents of fluorine and typomorphic trace elements as compared to the earlier rocks. Separation of high-F fluids enriched in trace alkalis and ore components led to the formation of the large Tigrenok greisen body, which hosts the main volume of the richest ores of the Tigriny deposit. [ABSTRACT FROM AUTHOR]
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  Data: Rare-Metal Granites of the Tigriny Massif (Sikhote-Alin): Geochemistry, Mineralogy and Evolution.
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  Data: <searchLink fieldCode="JN" term="%22Russian+Journal+of+Pacific+Geology%22">Russian Journal of Pacific Geology</searchLink>. Feb2022, Vol. 16 Issue 1, p42-61. 20p.
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  Data: *<searchLink fieldCode="DE" term="%22Geochemistry%22">Geochemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Mineralogy%22">Mineralogy</searchLink><br />*<searchLink fieldCode="DE" term="%22Granite%22">Granite</searchLink><br />*<searchLink fieldCode="DE" term="%22Plagioclase%22">Plagioclase</searchLink><br />*<searchLink fieldCode="DE" term="%22Ore+deposits%22">Ore deposits</searchLink><br />*<searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br />*<searchLink fieldCode="DE" term="%22Sodic+soils%22">Sodic soils</searchLink>
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  Data: This article describes the geological setting, geochemical features of rocks and the composition of the main minerals (micas, feldspars) of the granitoids of the Tigriny intrusion (Central Sikhote-Alin), associated with Sn-W mineralization. It is shown that the granitoids have high contents of fluorine and typomorphic trace elements and geochemically correspond to Li–F rare-metal granitoids. The evolution of rare-metal-granite magmas of the Tigriny massif was controlled by two main processes: fluid–magmatic interaction, which led to the formation of ultrapotassic pegmatoid granites, stockscheiders, and crystallization differentiation along the albite "trend," which led to the formation of lower-silica aluminous sodic melts of the final phase. The latter were likely emplaced in an open or partially open-system conditions and experienced intense degassing during crystallization, which resulted in the formation of late plagioclase granites with lower contents of fluorine and typomorphic trace elements as compared to the earlier rocks. Separation of high-F fluids enriched in trace alkalis and ore components led to the formation of the large Tigrenok greisen body, which hosts the main volume of the richest ores of the Tigriny deposit. [ABSTRACT FROM AUTHOR]
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        Value: 10.1134/S1819714022010079
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        Text: English
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      – SubjectFull: Granite
        Type: general
      – SubjectFull: Plagioclase
        Type: general
      – SubjectFull: Ore deposits
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      – SubjectFull: Magmas
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      – SubjectFull: Sodic soils
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      – TitleFull: Rare-Metal Granites of the Tigriny Massif (Sikhote-Alin): Geochemistry, Mineralogy and Evolution.
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              Text: Feb2022
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