Geochemistry, isotope triad (Nd-Sr-O), and 40Ar-39Ar age of Paleozoic alkaline mafic intrusions of the Kuznetsk Alatau (by the example of the Belaya Gora pluton)

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Geochemistry, isotope triad (Nd-Sr-O), and ⁴⁰Ar-³⁹Ar age of Paleozoic alkaline mafic intrusions of the Kuznetsk Alatau (by the example of the Belaya Gora pluton). / Vrublevskii, V. V.; Grinev, O. M.; Izokh, A. E. et al.

In: Russian Geology and Geophysics, Vol. 57, No. 3, 01.03.2016, p. 464-472.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{9bb32d1f329d4ed3aae415026fffff01,

title = "Geochemistry, isotope triad (Nd-Sr-O), and 40Ar-39Ar age of Paleozoic alkaline mafic intrusions of the Kuznetsk Alatau (by the example of the Belaya Gora pluton)",

abstract = "We report the first data on 40Ar/39Ar dating, trace-element geochemistry, and isotope (Nd, Sr, O) composition of the Belaya Gora gabbro-foidolite-foyaite intrusive massif, one of typical representatives of the alkaline province of the northeastern Kuznetsk Alatau. The established age of rock-forming amphibole, ~401-403 Ma, is taken as the time of the pluton formation in the Early Devonian. The distribution and ratios of LILE and HFSE in the rocks suggest that the intrusion took place in the setting of {"}superposition{"} of Devonian mantle plume on the Early Paleozoic accretion-collision complexes. Therefore, the source of magmatic products had a heterogeneous composition as a result of mixing of plume material with the substances of suprasubduction and crustal substrates. The mantle component might have been a PREMA + EM combination, which is confirmed by the parameters of the Nd isotope composition (εNdT - 3.2-4.6; TNd(DM) - 0.8 Ga) of alkaline rocks. 87 86 18 The effects of crustal contamination are reflected in the high ratios of strontium and oxygen isotopes ( Sr/ Sr)T - 0.7046-0.7054; 5 O - 8.5-9.2%c, SMOW).",

keywords = "Alkaline magmatism, Central Asian Orogenic Belt, Geochemistry, Geochronology, Kuznetsk Alatau, Mantle plume",

author = "Vrublevskii, {V. V.} and Grinev, {O. M.} and Izokh, {A. E.} and Travin, {A. V.}",

year = "2016",

month = mar,

day = "1",

doi = "10.1016/j.rgg.2016.03.008",

language = "English",

volume = "57",

pages = "464--472",

journal = "Russian Geology and Geophysics",

issn = "1068-7971",

publisher = "Elsevier Science B.V.",

number = "3",

}

RIS

TY - JOUR

T1 - Geochemistry, isotope triad (Nd-Sr-O), and 40Ar-39Ar age of Paleozoic alkaline mafic intrusions of the Kuznetsk Alatau (by the example of the Belaya Gora pluton)

AU - Vrublevskii, V. V.

AU - Grinev, O. M.

AU - Izokh, A. E.

AU - Travin, A. V.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - We report the first data on 40Ar/39Ar dating, trace-element geochemistry, and isotope (Nd, Sr, O) composition of the Belaya Gora gabbro-foidolite-foyaite intrusive massif, one of typical representatives of the alkaline province of the northeastern Kuznetsk Alatau. The established age of rock-forming amphibole, ~401-403 Ma, is taken as the time of the pluton formation in the Early Devonian. The distribution and ratios of LILE and HFSE in the rocks suggest that the intrusion took place in the setting of "superposition" of Devonian mantle plume on the Early Paleozoic accretion-collision complexes. Therefore, the source of magmatic products had a heterogeneous composition as a result of mixing of plume material with the substances of suprasubduction and crustal substrates. The mantle component might have been a PREMA + EM combination, which is confirmed by the parameters of the Nd isotope composition (εNdT - 3.2-4.6; TNd(DM) - 0.8 Ga) of alkaline rocks. 87 86 18 The effects of crustal contamination are reflected in the high ratios of strontium and oxygen isotopes ( Sr/ Sr)T - 0.7046-0.7054; 5 O - 8.5-9.2%c, SMOW).

AB - We report the first data on 40Ar/39Ar dating, trace-element geochemistry, and isotope (Nd, Sr, O) composition of the Belaya Gora gabbro-foidolite-foyaite intrusive massif, one of typical representatives of the alkaline province of the northeastern Kuznetsk Alatau. The established age of rock-forming amphibole, ~401-403 Ma, is taken as the time of the pluton formation in the Early Devonian. The distribution and ratios of LILE and HFSE in the rocks suggest that the intrusion took place in the setting of "superposition" of Devonian mantle plume on the Early Paleozoic accretion-collision complexes. Therefore, the source of magmatic products had a heterogeneous composition as a result of mixing of plume material with the substances of suprasubduction and crustal substrates. The mantle component might have been a PREMA + EM combination, which is confirmed by the parameters of the Nd isotope composition (εNdT - 3.2-4.6; TNd(DM) - 0.8 Ga) of alkaline rocks. 87 86 18 The effects of crustal contamination are reflected in the high ratios of strontium and oxygen isotopes ( Sr/ Sr)T - 0.7046-0.7054; 5 O - 8.5-9.2%c, SMOW).

KW - Alkaline magmatism

KW - Central Asian Orogenic Belt

KW - Geochemistry

KW - Geochronology

KW - Kuznetsk Alatau

KW - Mantle plume

UR - http://www.scopus.com/inward/record.url?scp=84962160826&partnerID=8YFLogxK

U2 - 10.1016/j.rgg.2016.03.008

DO - 10.1016/j.rgg.2016.03.008

M3 - Article

AN - SCOPUS:84962160826

VL - 57

SP - 464

EP - 472

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 3

ER -

ID: 25489355