Research output: Contribution to journal › Article › peer-review
Fragments of Paleoproterozoic Large Igneous Provinces in Northern Fennoscandia : Baddeleyite U–Pb Age Data for Mafic Dykes and Sills. / Salnikova, E. B.; Veselovskiy, R. V.; Arzamastsev, A. A.; Erofeeva, K. G.
In: Doklady Earth Sciences, Vol. 491, No. 2, 01.04.2020, p. 227-230.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Fragments of Paleoproterozoic Large Igneous Provinces in Northern Fennoscandia
T2 - Baddeleyite U–Pb Age Data for Mafic Dykes and Sills
AU - Salnikova, E. B.
AU - Veselovskiy, R. V.
AU - Arzamastsev, A. A.
AU - Erofeeva, K. G.
N1 - Funding Information: This study was supported by the Russian Science Foundation, project no. 16-17–10260-P. Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Abstract: New data on the age of dolerite dikes in the NE part of the Kola province of the Fennoscandinavian shield and the picrodolerite sills that cut the dikes are presented. The results of U–Pb ID-TIMS baddeleyite dating indicate that dolerites were formed between 2508 ± 6 and 2513 ± 16 Ma ago, simultaneously with the intrusions of the Monchegorsk group. A comparison of the composition of the dolerites studied with dykes of the same age found in other Archean cratons shows their significant similarity and suggests their formation at the same large magmatic province. The age of baddeleyite from the picrodolerites sills at 2403 ± 12 Ma ago indicates an event of basic magmatism that was not previously established in this part of the Fennoscandinavian shield. It is possible that, along with dolerite dykes with an age of 2405 Ma and komatiites of the Vetreny belt of the Karelian craton, sills of the Kola province are a component of a unified large magmatic event.
AB - Abstract: New data on the age of dolerite dikes in the NE part of the Kola province of the Fennoscandinavian shield and the picrodolerite sills that cut the dikes are presented. The results of U–Pb ID-TIMS baddeleyite dating indicate that dolerites were formed between 2508 ± 6 and 2513 ± 16 Ma ago, simultaneously with the intrusions of the Monchegorsk group. A comparison of the composition of the dolerites studied with dykes of the same age found in other Archean cratons shows their significant similarity and suggests their formation at the same large magmatic province. The age of baddeleyite from the picrodolerites sills at 2403 ± 12 Ma ago indicates an event of basic magmatism that was not previously established in this part of the Fennoscandinavian shield. It is possible that, along with dolerite dykes with an age of 2405 Ma and komatiites of the Vetreny belt of the Karelian craton, sills of the Kola province are a component of a unified large magmatic event.
KW - baddeleyite
KW - Fennoscandia
KW - mafic dykes
KW - U–Pb dating
UR - http://www.scopus.com/inward/record.url?scp=85086408061&partnerID=8YFLogxK
U2 - 10.1134/S1028334X20040145
DO - 10.1134/S1028334X20040145
M3 - Article
AN - SCOPUS:85086408061
VL - 491
SP - 227
EP - 230
JO - Doklady Earth Sciences
JF - Doklady Earth Sciences
SN - 1028-334X
IS - 2
ER -
ID: 69864463