1.86 Ga key paleomagnetic pole from the Murmansk craton intrusions – Eastern Murman Sill Province, NE Fennoscandia: Multidisciplinary approach and paleotectonic applications

Roman V. Veselovskiy, Alexander V. Samsonov, Alexandra V. Stepanova, Ekaterina B. Salnikova, Yulia O. Larionova, Alexey V. Travin, Andrey A. Arzamastsev, Svetlana V. Egorova, Kseniya G. Erofeeva, Maria V. Stifeeva, Valentina V. Shcherbakova, Valeriy P. Shcherbakov, Grigoriy V. Zhidkov, Vladimir S. Zakharov

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

We present the first 1.86 Ga paleomagnetic key pole of Fennoscandia obtained for the dolerite sills of the Murmansk craton - Eastern Murman Sill Province, that outcrop in the northern part of the Kola Peninsula along the Barents Sea coast for a distance of 200 km (Slat = 68.5 degrees; Slong = 37.9 degrees; N = 16 sites; Plat = 54.7 degrees; Plong = 234.7 degrees; dp/dm = 4.3 degrees/6.3 degrees, Qv = 5). The age of the sills and their characteristic remanent magnetization (ChRM) was determined by four independent geochronometers: U-Pb -1860 +/- 4 and 1863 +/- 7 Ma (IDTIMS, baddeleyite), Sm-Nd - 1889 +/- 57 Ma, Rb-Sr - 1850 Ma, Ar/Ar - 1865 +/- 8 and 1857 +/- 20 Ma (biotite). The primary nature of the ChRM is confirmed by the results of petrographic, geochemical, paleo- and rock magnetic studies, as well as by thermochronological data. The similarity of the petrographic and geochemical characteristics of sills from different localities indicates that these dolerite sills were formed during a single magmatic event and their cooling down to 580 degrees C occurred at depths of about 10 +/- 2 km and lasted similar to 2800 years or even faster. Paleogeographic reconstruction of Fennoscandia on the basis of the obtained paleomagnetic pole is in general agreement with the previously suggested configuration of core of the Nuna/Columbia supercontinent (Evans and Mitchell, 2011; Meert and Santosh, 2017). A new reliable Thellier-Coe paleointensity determination for this time reveals a rather low mean VDM = 1.8 ( +/- 0.1) x 10(22) Am-2 that supports the Proterozoic dipole low hypothesis (Biggin et al., 2009).

Translated title of the contribution1.86 Палеомагнитный полюс....
Original languageEnglish
Article number5
Pages (from-to)126-145
Number of pages20
JournalPrecambrian Research
Volume324
DOIs
StatePublished - 1 May 2019

Keywords

  • Fennoscandian Shield
  • Geochemistry
  • Geochronology
  • Key paleomagnetic pole
  • Murmansk craton
  • Paleointensity

Scopus subject areas

  • Geology
  • Geochemistry and Petrology

Cite this

Veselovskiy, Roman V. ; Samsonov, Alexander V. ; Stepanova, Alexandra V. ; Salnikova, Ekaterina B. ; Larionova, Yulia O. ; Travin, Alexey V. ; Arzamastsev, Andrey A. ; Egorova, Svetlana V. ; Erofeeva, Kseniya G. ; Stifeeva, Maria V. ; Shcherbakova, Valentina V. ; Shcherbakov, Valeriy P. ; Zhidkov, Grigoriy V. ; Zakharov, Vladimir S. / 1.86 Ga key paleomagnetic pole from the Murmansk craton intrusions – Eastern Murman Sill Province, NE Fennoscandia : Multidisciplinary approach and paleotectonic applications. In: Precambrian Research. 2019 ; Vol. 324. pp. 126-145.
@article{d58d00bc53a545f592802a55d308263a,
title = "1.86 Ga key paleomagnetic pole from the Murmansk craton intrusions – Eastern Murman Sill Province, NE Fennoscandia: Multidisciplinary approach and paleotectonic applications",
abstract = "We present the first 1.86 Ga paleomagnetic key pole of Fennoscandia obtained for the dolerite sills of the Murmansk craton - Eastern Murman Sill Province, that outcrop in the northern part of the Kola Peninsula along the Barents Sea coast for a distance of 200 km (Slat = 68.5 degrees; Slong = 37.9 degrees; N = 16 sites; Plat = 54.7 degrees; Plong = 234.7 degrees; dp/dm = 4.3 degrees/6.3 degrees, Qv = 5). The age of the sills and their characteristic remanent magnetization (ChRM) was determined by four independent geochronometers: U-Pb -1860 +/- 4 and 1863 +/- 7 Ma (IDTIMS, baddeleyite), Sm-Nd - 1889 +/- 57 Ma, Rb-Sr - 1850 Ma, Ar/Ar - 1865 +/- 8 and 1857 +/- 20 Ma (biotite). The primary nature of the ChRM is confirmed by the results of petrographic, geochemical, paleo- and rock magnetic studies, as well as by thermochronological data. The similarity of the petrographic and geochemical characteristics of sills from different localities indicates that these dolerite sills were formed during a single magmatic event and their cooling down to 580 degrees C occurred at depths of about 10 +/- 2 km and lasted similar to 2800 years or even faster. Paleogeographic reconstruction of Fennoscandia on the basis of the obtained paleomagnetic pole is in general agreement with the previously suggested configuration of core of the Nuna/Columbia supercontinent (Evans and Mitchell, 2011; Meert and Santosh, 2017). A new reliable Thellier-Coe paleointensity determination for this time reveals a rather low mean VDM = 1.8 ( +/- 0.1) x 10(22) Am-2 that supports the Proterozoic dipole low hypothesis (Biggin et al., 2009).",
keywords = "Fennoscandian Shield, Geochemistry, Geochronology, Key paleomagnetic pole, Murmansk craton, Paleointensity",
author = "Veselovskiy, {Roman V.} and Samsonov, {Alexander V.} and Stepanova, {Alexandra V.} and Salnikova, {Ekaterina B.} and Larionova, {Yulia O.} and Travin, {Alexey V.} and Arzamastsev, {Andrey A.} and Egorova, {Svetlana V.} and Erofeeva, {Kseniya G.} and Stifeeva, {Maria V.} and Shcherbakova, {Valentina V.} and Shcherbakov, {Valeriy P.} and Zhidkov, {Grigoriy V.} and Zakharov, {Vladimir S.}",
year = "2019",
month = "5",
day = "1",
doi = "10.1016/j.precamres.2019.01.017",
language = "English",
volume = "324",
pages = "126--145",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Elsevier",

}

Veselovskiy, RV, Samsonov, AV, Stepanova, AV, Salnikova, EB, Larionova, YO, Travin, AV, Arzamastsev, AA, Egorova, SV, Erofeeva, KG, Stifeeva, MV, Shcherbakova, VV, Shcherbakov, VP, Zhidkov, GV & Zakharov, VS 2019, '1.86 Ga key paleomagnetic pole from the Murmansk craton intrusions – Eastern Murman Sill Province, NE Fennoscandia: Multidisciplinary approach and paleotectonic applications' Precambrian Research, vol. 324, 5, pp. 126-145. https://doi.org/10.1016/j.precamres.2019.01.017

1.86 Ga key paleomagnetic pole from the Murmansk craton intrusions – Eastern Murman Sill Province, NE Fennoscandia : Multidisciplinary approach and paleotectonic applications. / Veselovskiy, Roman V.; Samsonov, Alexander V.; Stepanova, Alexandra V.; Salnikova, Ekaterina B.; Larionova, Yulia O.; Travin, Alexey V.; Arzamastsev, Andrey A.; Egorova, Svetlana V.; Erofeeva, Kseniya G.; Stifeeva, Maria V.; Shcherbakova, Valentina V.; Shcherbakov, Valeriy P.; Zhidkov, Grigoriy V.; Zakharov, Vladimir S.

In: Precambrian Research, Vol. 324, 5, 01.05.2019, p. 126-145.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - 1.86 Ga key paleomagnetic pole from the Murmansk craton intrusions – Eastern Murman Sill Province, NE Fennoscandia

T2 - Multidisciplinary approach and paleotectonic applications

AU - Veselovskiy, Roman V.

AU - Samsonov, Alexander V.

AU - Stepanova, Alexandra V.

AU - Salnikova, Ekaterina B.

AU - Larionova, Yulia O.

AU - Travin, Alexey V.

AU - Arzamastsev, Andrey A.

AU - Egorova, Svetlana V.

AU - Erofeeva, Kseniya G.

AU - Stifeeva, Maria V.

AU - Shcherbakova, Valentina V.

AU - Shcherbakov, Valeriy P.

AU - Zhidkov, Grigoriy V.

AU - Zakharov, Vladimir S.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - We present the first 1.86 Ga paleomagnetic key pole of Fennoscandia obtained for the dolerite sills of the Murmansk craton - Eastern Murman Sill Province, that outcrop in the northern part of the Kola Peninsula along the Barents Sea coast for a distance of 200 km (Slat = 68.5 degrees; Slong = 37.9 degrees; N = 16 sites; Plat = 54.7 degrees; Plong = 234.7 degrees; dp/dm = 4.3 degrees/6.3 degrees, Qv = 5). The age of the sills and their characteristic remanent magnetization (ChRM) was determined by four independent geochronometers: U-Pb -1860 +/- 4 and 1863 +/- 7 Ma (IDTIMS, baddeleyite), Sm-Nd - 1889 +/- 57 Ma, Rb-Sr - 1850 Ma, Ar/Ar - 1865 +/- 8 and 1857 +/- 20 Ma (biotite). The primary nature of the ChRM is confirmed by the results of petrographic, geochemical, paleo- and rock magnetic studies, as well as by thermochronological data. The similarity of the petrographic and geochemical characteristics of sills from different localities indicates that these dolerite sills were formed during a single magmatic event and their cooling down to 580 degrees C occurred at depths of about 10 +/- 2 km and lasted similar to 2800 years or even faster. Paleogeographic reconstruction of Fennoscandia on the basis of the obtained paleomagnetic pole is in general agreement with the previously suggested configuration of core of the Nuna/Columbia supercontinent (Evans and Mitchell, 2011; Meert and Santosh, 2017). A new reliable Thellier-Coe paleointensity determination for this time reveals a rather low mean VDM = 1.8 ( +/- 0.1) x 10(22) Am-2 that supports the Proterozoic dipole low hypothesis (Biggin et al., 2009).

AB - We present the first 1.86 Ga paleomagnetic key pole of Fennoscandia obtained for the dolerite sills of the Murmansk craton - Eastern Murman Sill Province, that outcrop in the northern part of the Kola Peninsula along the Barents Sea coast for a distance of 200 km (Slat = 68.5 degrees; Slong = 37.9 degrees; N = 16 sites; Plat = 54.7 degrees; Plong = 234.7 degrees; dp/dm = 4.3 degrees/6.3 degrees, Qv = 5). The age of the sills and their characteristic remanent magnetization (ChRM) was determined by four independent geochronometers: U-Pb -1860 +/- 4 and 1863 +/- 7 Ma (IDTIMS, baddeleyite), Sm-Nd - 1889 +/- 57 Ma, Rb-Sr - 1850 Ma, Ar/Ar - 1865 +/- 8 and 1857 +/- 20 Ma (biotite). The primary nature of the ChRM is confirmed by the results of petrographic, geochemical, paleo- and rock magnetic studies, as well as by thermochronological data. The similarity of the petrographic and geochemical characteristics of sills from different localities indicates that these dolerite sills were formed during a single magmatic event and their cooling down to 580 degrees C occurred at depths of about 10 +/- 2 km and lasted similar to 2800 years or even faster. Paleogeographic reconstruction of Fennoscandia on the basis of the obtained paleomagnetic pole is in general agreement with the previously suggested configuration of core of the Nuna/Columbia supercontinent (Evans and Mitchell, 2011; Meert and Santosh, 2017). A new reliable Thellier-Coe paleointensity determination for this time reveals a rather low mean VDM = 1.8 ( +/- 0.1) x 10(22) Am-2 that supports the Proterozoic dipole low hypothesis (Biggin et al., 2009).

KW - Fennoscandian Shield

KW - Geochemistry

KW - Geochronology

KW - Key paleomagnetic pole

KW - Murmansk craton

KW - Paleointensity

UR - http://www.scopus.com/inward/record.url?scp=85061095678&partnerID=8YFLogxK

U2 - 10.1016/j.precamres.2019.01.017

DO - 10.1016/j.precamres.2019.01.017

M3 - Article

VL - 324

SP - 126

EP - 145

JO - Precambrian Research

JF - Precambrian Research

SN - 0301-9268

M1 - 5

ER -