Geochemical features and geodynamic setting of formation of the Lukinda dunite-troctolite-gabbro massif (southeastern framing of the Siberian Platform)

Buchko I.V.; Sorokin A.A.; Ponomarchuk V.A.; Izokh A.E.

doi:10.1016/j.rgg.2012.05.002

Инд. авторы:	Buchko I.V., Sorokin A.A., Ponomarchuk V.A., Izokh A.E.
Заглавие:	Geochemical features and geodynamic setting of formation of the Lukinda dunite-troctolite-gabbro massif (southeastern framing of the Siberian Platform)
Библ. ссылка:	Buchko I.V., Sorokin A.A., Ponomarchuk V.A., Izokh A.E. Geochemical features and geodynamic setting of formation of the Lukinda dunite-troctolite-gabbro massif (southeastern framing of the Siberian Platform) // Russian Geology and Geophysics. - 2012. - Vol.53. - Iss. 7. - P.636-648. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2012.05.002; SCOPUS: 2-s2.0-84862518930;
Реферат:	eng: The Lukinda dunite-troctolite-gabbro massif in the Selenga-Stanovoy superterrane on the southeastern framing of the Siberian Platform was earlier considered Precambrian. The performed 40Ar/ 39Ar dating of the massif plagioclase yielded an Early Permian age (285 ± 7.5 Ma). The main specific petrochemical features of the intrusion rocks during their crystallization differentiation are an increase in SiO 2 and CaO contents and a decrease in FeO tot content, with TiO 2 content remaining low and showing minor variations. A specific geochemical feature of the Lukinda massif ultrabasite-basites is a slight domination of LREE over HREE, with (La/Yb) N= 1.0-8.2. The depletion of the massif rocks in LILE (except for Sr and Ba), REE, and HFSE suggests that the massif formed on an active continental margin. © 2012.
Ключевые слова:	Russian Federation; Precambrian; plagioclase; igneous intrusion; igneous geochemistry; geodynamics; gabbro; Siberian Platform; crystallization; continental margin; Ultrabasite-basites; Petrology; Layered intrusions; Isotope dating; Geochemistry; dunite;
Издано:	2012
Физ. характеристика:	с.636-648