Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Compositions of gabbro intrusions in the Krestovsky zone (western Baikal region) : A record of plume–suprasubduction mantle interaction. / Lavrenchuk, A. V.; Sklyarov, E. V.; Izokh, A. E. и др.
в: Russian Geology and Geophysics, Том 58, № 10, 01.10.2017, стр. 1139-1153.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Compositions of gabbro intrusions in the Krestovsky zone (western Baikal region)
T2 - A record of plume–suprasubduction mantle interaction
AU - Lavrenchuk, A. V.
AU - Sklyarov, E. V.
AU - Izokh, A. E.
AU - Kotov, A. B.
AU - Sal'nikova, E. B.
AU - Fedorovsky, V. S.
AU - Mazukabzov, A. M.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - We provide new geochemical and isotope-geochronological evidence for gabbro intrusions of the Krestovsky zone in the Olkhon composite terrane. The intrusions belong to the Birkhin (similar to 500 Ma) and Ust'-Krestovsky (similar to 470 Ma) complexes, which underwent several pulses of magmatism. Rock structures and textures record magma crystallization in tectonically turbulent conditions. The compositions of gabbro are similar to those of subduction-related basalts, but the Ust'-Krestovsky gabbro is richer in incompatible elements than the Birkhin rocks. A similar composition trend of gabbro is observed in other areas of the Central Asian Orogenic Belt (CAOB): southeastern Tuva, Gornaya Shoria, and western Mongolia. We suggest a model of regular composition changes in parental magmas during the interaction of a mantle plume with suprasubductional lithospheric mantle. (C) 2017, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
AB - We provide new geochemical and isotope-geochronological evidence for gabbro intrusions of the Krestovsky zone in the Olkhon composite terrane. The intrusions belong to the Birkhin (similar to 500 Ma) and Ust'-Krestovsky (similar to 470 Ma) complexes, which underwent several pulses of magmatism. Rock structures and textures record magma crystallization in tectonically turbulent conditions. The compositions of gabbro are similar to those of subduction-related basalts, but the Ust'-Krestovsky gabbro is richer in incompatible elements than the Birkhin rocks. A similar composition trend of gabbro is observed in other areas of the Central Asian Orogenic Belt (CAOB): southeastern Tuva, Gornaya Shoria, and western Mongolia. We suggest a model of regular composition changes in parental magmas during the interaction of a mantle plume with suprasubductional lithospheric mantle. (C) 2017, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.
KW - mafic magmatism
KW - isotopic age
KW - plume-lithosphere interaction
KW - magma source
KW - western Baikal region
KW - TRACE-ELEMENTS
KW - ISOTOPIC AGE
KW - MAGMATISM
KW - COMPLEX
KW - ROCKS
KW - PB
KW - EVOLUTION
KW - ZIRCON
UR - http://www.scopus.com/inward/record.url?scp=85032964258&partnerID=8YFLogxK
U2 - 10.1016/j.rgg.2017.09.001
DO - 10.1016/j.rgg.2017.09.001
M3 - Article
AN - SCOPUS:85032964258
VL - 58
SP - 1139
EP - 1153
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 10
ER -
ID: 9721848