Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Geochemistry of Precambrian volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan). / Dmitrieva, N. V.; Letnikova, E. F.; Vishnevskaya, I. A. и др.
в: Russian Geology and Geophysics, Том 58, № 8, 01.08.2017, стр. 935-948.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Geochemistry of Precambrian volcanosedimentary rocks of the Karsakpai Group in southern Ulutau (Central Kazakhstan)
AU - Dmitrieva, N. V.
AU - Letnikova, E. F.
AU - Vishnevskaya, I. A.
AU - Serov, P. A.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - 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.
AB - 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.
KW - Central Kazakhstan
KW - Late Precambrian
KW - rift volcanics
KW - sedimentary rocks of iron formation
KW - Sm-Nd isotope composition
KW - volcanosedimentary rocks
KW - OCEANIC BASALTS
KW - SEAWATER
KW - YTTRIUM
KW - PACIFIC-OCEAN
KW - TRANSVAAL SUPERGROUP
KW - HYDROTHERMAL FLUIDS
KW - RARE-EARTH-ELEMENTS
KW - ICP-MS
KW - IRON-FORMATION
KW - WATER
UR - http://www.scopus.com/inward/record.url?scp=85026873190&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2017.07.004
DO - 10.1016/j.rgg.2017.07.004
M3 - Article
AN - SCOPUS:85026873190
VL - 58
SP - 935
EP - 948
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 8
ER -
ID: 9965927