Инд. авторы:	Dmitrieva N.V., Letnikova E.F., Vishnevskaya I.A., Serov P.A.
Заглавие:	Geochemistry of Precambrian volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan)
Библ. ссылка:	Dmitrieva N.V., Letnikova E.F., Vishnevskaya I.A., Serov P.A. Geochemistry of Precambrian volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan) // Russian Geology and Geophysics. - 2017. - Vol.58. - Iss. 8. - P.935-948. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы:	DOI: 10.1016/j.rgg.2017.07.004; SCOPUS: 2-s2.0-85026873190; WoS: 000407795300005;
Реферат:	eng: We have analyzed the isotope-geochemical features of volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan): mafic volcanics, siliceous and siliceous-ferruginous sediments, and quartz-sericite-chlorite schists. The close association of ferruginous quartzites with intraplate volcanics indicates that they formed in a tectonically active basin. The Nd isotope composition of ferruginous quartzites was governed by synchronous underwater volcanism, whereas the 143Nd/144Nd value of schists was additionally controlled by the Nd isotope composition of older sources. The Mesoproterozoic Nd model ages and positive εNd(t) values of the metaterrigenous rocks of the Karsakpai Group indicate the presence of Mesoproterozoic juvenile material in the provenance. The minimum Nd model ages suggest the lower boundary of sedimentation of 1.3 Ga. © 2017
Ключевые слова:	sedimentary rock; sediment chemistry; samarium; Precambrian; neodymium isotope; isotopic composition; isotopic analysis; banded iron formation; volcanosedimentary rocks; Sm-Nd isotope composition; sedimentary rocks of iron formation; rift volcanics; Late Precambrian; Central Kazakhstan; Kazakhstan;
Издано:	2017
Физ. характеристика:	с.935-948