Инд. авторы:	Chebotarev D.A., Doroshkevich A.G., Sharygin V.V., Yudin D.S., Ponomarchuk A.V., Sergeev S.A.
Заглавие:	Geochronology of the Chuktukon carbonatite massif, Chadobets uplift (Krasnoyarsk Territory)
Библ. ссылка:	Chebotarev D.A., Doroshkevich A.G., Sharygin V.V., Yudin D.S., Ponomarchuk A.V., Sergeev S.A. Geochronology of the Chuktukon carbonatite massif, Chadobets uplift (Krasnoyarsk Territory) // Russian Geology and Geophysics. - 2017. - Vol.58. - Iss. 10. - P.1222-1231. - ISSN 1068-7971. - EISSN 1878-030X.
Идентиф-ры:	DOI: 10.1016/j.rgg.2017.02.003; WoS: 000413626200007;
Реферат:	eng: We present results of U-Pb (SHRIMP II) and Ar-Ar geochronological study of the rocks of the Chuktukon massif, which is part of the Chadobets alkaline-carbonatite complex, and of the weathering crust developed after them. Perovskite from picrites and monazite from the weathering crust were dated by the U-Pb (SHRIMP II) method, and rippite from carbonatites, by the Ar-Ar method. Rippite has first been used as a geochronometer. The estimated ages (252 +/- 12 and 231 +/- 2.7 Ma) testify to two magmatism pulses close in time (within the estimation error) to the stages of alkaline magmatism in the Siberian Platform (250-245 and 238-234 Ma). These pulses characterize, most likely, the processes accompanying and completing the activity of the mantle superplume that formed the Siberian Igneous Province at 250-248 Ma. The monazite-estimated age (102.6 +/- 2.9 Ma) reflects the time of formation of the ore-bearing weathering crust on the massif rocks. (C) 2017, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
Ключевые слова:	BOUNDARY; AGE; MAGMATISM; GORNYI-ALTAI; MANTLE PLUMES; Chadobets uplift; RUSSIA; rippite; monazite; perovskite; weathering crust; carbonatite; alkaline magmatism; geochronology; Chuktukon massif; PROVINCE;
Издано:	2017
Физ. хар-ка:	с.1222-1231