Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince

Esa Heilimo, Perttu Mikkola, Hannu Huhma, Jaana Halla

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKirjan luku tai artikkeliTieteellinenvertaisarvioitu

Kuvaus

We have studied a group of granitoids from the Western Karelia subprovince of the Fennoscandian Shield. This group is referred to as quartz syenites, but shows compositional variation from syenites to quartz monzonites, with a small number of monzonites and granites. Compositionally studied rocks are alkali and alkali-calcic, and magnesian, mostly metaluminous. Characteristically, they have a high content of alkaline (Na, K), large ion lithophile elements (LILE) (Ba, Sr), high-field strength elements (HFSE) (TiO 2 , Zr, Ce), as well as a low content of Mg, Ni and Cr, by which they can be distinguished from sanukitoid and quartz diorite suites of the Karelia Province. These quartz syenites were emplaced between 2.74 and 2.66 Ga, representing late-phase intrusions overlapping in age with the sanukitoids, the quartz diorites and the leucogranitoids. Initial whole-rock 1 Nd values of quartz syenites vary from 1.8 to 21.8, and do not indicate a significant contribution of considerably older crust. Oxygen-isotope data for zircon indicate a varying mantle source (d
18O 5.35–7.15‰), with a contribution from source(s) with elevated d18O values. Our data provide constraints on compositionally diverse Neoarchaean magmatism in the Archaean Karelia Province. The late Archaean evolution of the Western Karelia subprovince resembles that of the Neoarchean domains worldwide with respect to granitoid composition and temporal distribution.
Alkuperäiskielienglanti
OtsikkoCrust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons
ToimittajatJaana Halla, Martin Whitehouse, Talat Ahmad, Zibisani Bagai
Sivumäärä28
JulkaisupaikkaLondon
KustantajaGeological Society of London
Julkaisupäivä2017
Sivut61-88
ISBN (painettu)978-1-78620-280-2
DOI - pysyväislinkit
TilaJulkaistu - 2017
OKM-julkaisutyyppiA3 Kirjan tai muun kokoomateoksen osa

Julkaisusarja

NimiGeological Society Special Publication
KustantajaGeological Society of London
Numero449
ISSN (painettu)0305-8719

Tieteenalat

  • 1171 Geotieteet

Lainaa tätä

Heilimo, E., Mikkola, P., Huhma, H., & Halla, J. (2017). Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince. teoksessa J. Halla, M. Whitehouse, T. Ahmad, & Z. Bagai (Toimittajat), Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons (Sivut 61-88). (Geological Society Special Publication; Nro 449). London: Geological Society of London. https://doi.org/10.1144/SP449.4
Heilimo, Esa ; Mikkola, Perttu ; Huhma, Hannu ; Halla, Jaana . / Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince. Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons. Toimittaja / Jaana Halla ; Martin Whitehouse ; Talat Ahmad ; Zibisani Bagai. London : Geological Society of London, 2017. Sivut 61-88 (Geological Society Special Publication; 449).
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title = "Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince",
abstract = "We have studied a group of granitoids from the Western Karelia subprovince of the Fennoscandian Shield. This group is referred to as quartz syenites, but shows compositional variation from syenites to quartz monzonites, with a small number of monzonites and granites. Compositionally studied rocks are alkali and alkali-calcic, and magnesian, mostly metaluminous. Characteristically, they have a high content of alkaline (Na, K), large ion lithophile elements (LILE) (Ba, Sr), high-field strength elements (HFSE) (TiO 2 , Zr, Ce), as well as a low content of Mg, Ni and Cr, by which they can be distinguished from sanukitoid and quartz diorite suites of the Karelia Province. These quartz syenites were emplaced between 2.74 and 2.66 Ga, representing late-phase intrusions overlapping in age with the sanukitoids, the quartz diorites and the leucogranitoids. Initial whole-rock 1 Nd values of quartz syenites vary from 1.8 to 21.8, and do not indicate a significant contribution of considerably older crust. Oxygen-isotope data for zircon indicate a varying mantle source (d18O 5.35–7.15‰), with a contribution from source(s) with elevated d18O values. Our data provide constraints on compositionally diverse Neoarchaean magmatism in the Archaean Karelia Province. The late Archaean evolution of the Western Karelia subprovince resembles that of the Neoarchean domains worldwide with respect to granitoid composition and temporal distribution.",
keywords = "1171 Geosciences, OXYGEN-ISOTOPE COMPOSITION , PB ZIRCON GEOCHRONOLOGY , U-PB , EASTERN FINLAND , BALTIC SHIELD , SUPERIOR-PROVINCE , SM-ND , GEOCHEMICAL CHARACTERISTICS , FENNOSCANDIAN SHIELD , ARCHEAN GRANITOIDS",
author = "Esa Heilimo and Perttu Mikkola and Hannu Huhma and Jaana Halla",
year = "2017",
doi = "10.1144/SP449.4",
language = "English",
isbn = "978-1-78620-280-2",
series = "Geological Society Special Publication",
publisher = "Geological Society of London",
number = "449",
pages = "61--88",
editor = "Jaana Halla and Martin Whitehouse and Talat Ahmad and Zibisani Bagai",
booktitle = "Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons",
address = "United Kingdom",

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Heilimo, E, Mikkola, P, Huhma, H & Halla, J 2017, Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince. julkaisussa J Halla, M Whitehouse, T Ahmad & Z Bagai (toim), Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons. Geological Society Special Publication, Nro 449, Geological Society of London, London, Sivut 61-88. https://doi.org/10.1144/SP449.4

Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince. / Heilimo, Esa ; Mikkola, Perttu; Huhma, Hannu; Halla, Jaana .

Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons. toim. / Jaana Halla; Martin Whitehouse; Talat Ahmad; Zibisani Bagai. London : Geological Society of London, 2017. s. 61-88 (Geological Society Special Publication; Nro 449).

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKirjan luku tai artikkeliTieteellinenvertaisarvioitu

TY - CHAP

T1 - Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince

AU - Heilimo, Esa

AU - Mikkola, Perttu

AU - Huhma, Hannu

AU - Halla, Jaana

PY - 2017

Y1 - 2017

N2 - We have studied a group of granitoids from the Western Karelia subprovince of the Fennoscandian Shield. This group is referred to as quartz syenites, but shows compositional variation from syenites to quartz monzonites, with a small number of monzonites and granites. Compositionally studied rocks are alkali and alkali-calcic, and magnesian, mostly metaluminous. Characteristically, they have a high content of alkaline (Na, K), large ion lithophile elements (LILE) (Ba, Sr), high-field strength elements (HFSE) (TiO 2 , Zr, Ce), as well as a low content of Mg, Ni and Cr, by which they can be distinguished from sanukitoid and quartz diorite suites of the Karelia Province. These quartz syenites were emplaced between 2.74 and 2.66 Ga, representing late-phase intrusions overlapping in age with the sanukitoids, the quartz diorites and the leucogranitoids. Initial whole-rock 1 Nd values of quartz syenites vary from 1.8 to 21.8, and do not indicate a significant contribution of considerably older crust. Oxygen-isotope data for zircon indicate a varying mantle source (d18O 5.35–7.15‰), with a contribution from source(s) with elevated d18O values. Our data provide constraints on compositionally diverse Neoarchaean magmatism in the Archaean Karelia Province. The late Archaean evolution of the Western Karelia subprovince resembles that of the Neoarchean domains worldwide with respect to granitoid composition and temporal distribution.

AB - We have studied a group of granitoids from the Western Karelia subprovince of the Fennoscandian Shield. This group is referred to as quartz syenites, but shows compositional variation from syenites to quartz monzonites, with a small number of monzonites and granites. Compositionally studied rocks are alkali and alkali-calcic, and magnesian, mostly metaluminous. Characteristically, they have a high content of alkaline (Na, K), large ion lithophile elements (LILE) (Ba, Sr), high-field strength elements (HFSE) (TiO 2 , Zr, Ce), as well as a low content of Mg, Ni and Cr, by which they can be distinguished from sanukitoid and quartz diorite suites of the Karelia Province. These quartz syenites were emplaced between 2.74 and 2.66 Ga, representing late-phase intrusions overlapping in age with the sanukitoids, the quartz diorites and the leucogranitoids. Initial whole-rock 1 Nd values of quartz syenites vary from 1.8 to 21.8, and do not indicate a significant contribution of considerably older crust. Oxygen-isotope data for zircon indicate a varying mantle source (d18O 5.35–7.15‰), with a contribution from source(s) with elevated d18O values. Our data provide constraints on compositionally diverse Neoarchaean magmatism in the Archaean Karelia Province. The late Archaean evolution of the Western Karelia subprovince resembles that of the Neoarchean domains worldwide with respect to granitoid composition and temporal distribution.

KW - 1171 Geosciences

KW - OXYGEN-ISOTOPE COMPOSITION

KW - PB ZIRCON GEOCHRONOLOGY

KW - U-PB

KW - EASTERN FINLAND

KW - BALTIC SHIELD

KW - SUPERIOR-PROVINCE

KW - SM-ND

KW - GEOCHEMICAL CHARACTERISTICS

KW - FENNOSCANDIAN SHIELD

KW - ARCHEAN GRANITOIDS

U2 - 10.1144/SP449.4

DO - 10.1144/SP449.4

M3 - Chapter

SN - 978-1-78620-280-2

T3 - Geological Society Special Publication

SP - 61

EP - 88

BT - Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons

A2 - Halla, Jaana

A2 - Whitehouse, Martin

A2 - Ahmad, Talat

A2 - Bagai, Zibisani

PB - Geological Society of London

CY - London

ER -

Heilimo E, Mikkola P, Huhma H, Halla J. Alkaline-rich quartz syenite intrusions of the Western Karelia subprovince. julkaisussa Halla J, Whitehouse M, Ahmad T, Bagai Z, toimittajat, Crust–Mantle Interactions and Granitoid Diversification: Insights from Archaean Cratons. London: Geological Society of London. 2017. s. 61-88. (Geological Society Special Publication; 449). https://doi.org/10.1144/SP449.4