Mesoarchean mafic dykes of the Belomorian eclogite province (Gridino Village Area, Russia)

K. A. Dokukina; T. V. Kaulina; A. N. Konilov; L. M. Natapov; E. A. Belousova; K. V. Van; S. G. Simakin; E. N. Lepekhina

doi:10.1134/S1028334X14070034

Mesoarchean mafic dykes of the Belomorian eclogite province (Gridino Village Area, Russia)

K. A. Dokukina, T. V. Kaulina, A. N. Konilov, L. M. Natapov, E. A. Belousova, K. V. Van, S. G. Simakin, E. N. Lepekhina

ARC Centre of Excellence for Core to Crust Fluid Systems (incorporation ARC National Key Centre for Geochemical evolution and Metallogeny of Continents (GEMOC))

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

1 Citation (Scopus)

Abstract

Archean processes of eclogitization in the Gridino metamorphic association (the Belomorian eclogite province) developed in mafic dykes, boudins, and acidic rocks of the Archean continental crusts. To determine the U-Pb age of the intrusion of the latest dykes, the geochronological samples were taken from the dyke of ferriferious metagabbro that cross-cuts the dyke of eclogitzed and granulitized olivine gabbronorite. The igneous zircons were dated by the SHRIMP II technique. The zircons showed a concordia age of 2846 ± 7 Ma, which is considered as the time of intrusion of a mafic melt. The younger low-thorium zircon rims of 2.78-2.81 Ga age around the igneous cores are typical formations that appeared under metamorphic conditions in equilibrium with a migmatite melt, and may characterize the time of formation of the granite leucosome under metamorphism, probably of eclogite facies.

Original language	English
Pages (from-to)	824-830
Number of pages	7
Journal	Doklady Earth Sciences
Volume	457
Issue number	1
DOIs	https://doi.org/10.1134/S1028334X14070034
Publication status	Published - Jul 2014

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title = "Mesoarchean mafic dykes of the Belomorian eclogite province (Gridino Village Area, Russia)",

abstract = "Archean processes of eclogitization in the Gridino metamorphic association (the Belomorian eclogite province) developed in mafic dykes, boudins, and acidic rocks of the Archean continental crusts. To determine the U-Pb age of the intrusion of the latest dykes, the geochronological samples were taken from the dyke of ferriferious metagabbro that cross-cuts the dyke of eclogitzed and granulitized olivine gabbronorite. The igneous zircons were dated by the SHRIMP II technique. The zircons showed a concordia age of 2846 ± 7 Ma, which is considered as the time of intrusion of a mafic melt. The younger low-thorium zircon rims of 2.78-2.81 Ga age around the igneous cores are typical formations that appeared under metamorphic conditions in equilibrium with a migmatite melt, and may characterize the time of formation of the granite leucosome under metamorphism, probably of eclogite facies.",

author = "Dokukina, {K. A.} and Kaulina, {T. V.} and Konilov, {A. N.} and Natapov, {L. M.} and Belousova, {E. A.} and Van, {K. V.} and Simakin, {S. G.} and Lepekhina, {E. N.}",

year = "2014",

month = jul,

doi = "10.1134/S1028334X14070034",

language = "English",

volume = "457",

pages = "824--830",

journal = "Doklady Earth Sciences",

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T1 - Mesoarchean mafic dykes of the Belomorian eclogite province (Gridino Village Area, Russia)

AU - Dokukina, K. A.

AU - Kaulina, T. V.

AU - Konilov, A. N.

AU - Natapov, L. M.

AU - Belousova, E. A.

AU - Van, K. V.

AU - Simakin, S. G.

AU - Lepekhina, E. N.

PY - 2014/7

Y1 - 2014/7

N2 - Archean processes of eclogitization in the Gridino metamorphic association (the Belomorian eclogite province) developed in mafic dykes, boudins, and acidic rocks of the Archean continental crusts. To determine the U-Pb age of the intrusion of the latest dykes, the geochronological samples were taken from the dyke of ferriferious metagabbro that cross-cuts the dyke of eclogitzed and granulitized olivine gabbronorite. The igneous zircons were dated by the SHRIMP II technique. The zircons showed a concordia age of 2846 ± 7 Ma, which is considered as the time of intrusion of a mafic melt. The younger low-thorium zircon rims of 2.78-2.81 Ga age around the igneous cores are typical formations that appeared under metamorphic conditions in equilibrium with a migmatite melt, and may characterize the time of formation of the granite leucosome under metamorphism, probably of eclogite facies.

AB - Archean processes of eclogitization in the Gridino metamorphic association (the Belomorian eclogite province) developed in mafic dykes, boudins, and acidic rocks of the Archean continental crusts. To determine the U-Pb age of the intrusion of the latest dykes, the geochronological samples were taken from the dyke of ferriferious metagabbro that cross-cuts the dyke of eclogitzed and granulitized olivine gabbronorite. The igneous zircons were dated by the SHRIMP II technique. The zircons showed a concordia age of 2846 ± 7 Ma, which is considered as the time of intrusion of a mafic melt. The younger low-thorium zircon rims of 2.78-2.81 Ga age around the igneous cores are typical formations that appeared under metamorphic conditions in equilibrium with a migmatite melt, and may characterize the time of formation of the granite leucosome under metamorphism, probably of eclogite facies.

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DO - 10.1134/S1028334X14070034

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SN - 1028-334X

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JO - Doklady Earth Sciences

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IS - 1

ER -

Mesoarchean mafic dykes of the Belomorian eclogite province (Gridino Village Area, Russia)

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