Инд. авторы:	Soloviev S.G., Kryazhev S.G., Semenova D.V., Kalinin Y.A., Bortnikov N.S.
Заглавие:	First Data on the U-Pb Isotopic Age for Zircon (LA-ICP-MS Method) from Leucocratic Granites of the Tyrnyauz Mo-W Deposit (North Caucasus, Russia)
Библ. ссылка:	Soloviev S.G., Kryazhev S.G., Semenova D.V., Kalinin Y.A., Bortnikov N.S. First Data on the U-Pb Isotopic Age for Zircon (LA-ICP-MS Method) from Leucocratic Granites of the Tyrnyauz Mo-W Deposit (North Caucasus, Russia) // Doklady Earth Sciences. - 2021. - Vol.498. - Iss. 2. - P.471-476. - ISSN 1028-334X. - EISSN 1531-8354.
Идентиф-ры:	DOI: 10.1134/S1028334X21060155; WoS: 000669212700005;
Реферат:	eng: The first data of a U-Pb isotopic study (LA-ICP-MS method) of zircon from leucocratic granites of the giant Tyrnyauz Mo-W deposit (North Caucasus) are presented. The emplacement of this granite separated the formation stages of Mo-W skarns and younger large stockworks with Mo-mineralization. Two types of zircons are distinguished among the grains identified. The first type is represented by rare tabular and short-prismatic crystals (xenocrysts) of an ancient zircon, with large variations of the U-Pb isotopic age (from about 300 Ma to almost 1500 Ma). The second type includes more abundant long-prismatic crystals of a young zircon; its weighted average U-Pb isotopic age (2.67 +/- 0.04 Ma) corresponds to the time of leucocratic granite crystallization.
Ключевые слова:	North Caucasus; Tyrnyauz W-Mo deposit; granitoids; zircon; U-Pb isotopic studies; URANIUM;
Издано:	2021
Физ. хар-ка:	с.471-476