TY - JOUR

T1 - Rare-Metal Granites of the Tigriny Massif (Sikhote-Alin): Geochemistry, Mineralogy and Evolution

AU - Kruk, N. N.

AU - Gavryushkina, O. A.

AU - Fedoseev, D. G.

AU - Orekhov, A. A.

AU - Kruk, E. A.

AU - Kasatkin, S. A.

AU - Mednikov, S. L.

N1 - Funding Information: The study was supported by the Russian Foundation for Basic Research (project no. 20-05-00550) as well as by the State Task of the Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, and of the Far East Geological Institute, Far Eastern Branch, Russian Academy of Sciences. Publisher Copyright: © 2022, Pleiades Publishing, Ltd.

PY - 2022/2

Y1 - 2022/2

N2 - 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.

AB - 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.

KW - geochemistry

KW - mineralogy

KW - rare metal granitoids

KW - Sikhote-Alin

UR - http://www.scopus.com/inward/record.url?scp=85127253089&partnerID=8YFLogxK

U2 - 10.1134/S1819714022010079

DO - 10.1134/S1819714022010079

M3 - Article

AN - SCOPUS:85127253089

VL - 16

SP - 42

EP - 61

JO - Russian Journal of Pacific Geology

JF - Russian Journal of Pacific Geology

SN - 1819-7140

IS - 1

ER -