Conditions of Formation of Layered Intrusions of the Monchegorsk Magmatic Cluster

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Conditions of Formation of Layered Intrusions of the Monchegorsk Magmatic Cluster. / Semenov, V. S.; Kazanov, O. V.; Korneev, S. I.; Salnikova, E. B.; Semenov, S. V.

In: Petrology, Vol. 30, No. 4, 24.07.2022, p. 369-391.

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

Author

Semenov, V. S. ; Kazanov, O. V. ; Korneev, S. I. ; Salnikova, E. B. ; Semenov, S. V. / Conditions of Formation of Layered Intrusions of the Monchegorsk Magmatic Cluster. In: Petrology. 2022 ; Vol. 30, No. 4. pp. 369-391.

BibTeX

@article{eea96cb8a0cb45ef98e0cd8ff50f8c27,

title = "Conditions of Formation of Layered Intrusions of the Monchegorsk Magmatic Cluster",

abstract = "The paper presents geochronological data and results of petrological modeling of the Monchegorsk and Monchetundra layered massifs. The U-Pb ID-TIMS zircon dating of norite from the marginal zone of Mt. Nittis yielded 2506 ± 7 Ma, which coincides with previous data on similar rocks from other areas. Based on the comparison of sections of the Monchegorsk and Kivakka massifs, the pre-erosion thickness of the Monchegorsk massif is estimated as 3700 m. Calculations using rocks of the marginal zone of the Monchegorsk intrusion at a pressure of 6.5–5.5 kbar showed that the melt in equilibrium with Ol contained SiO2 ≤ 55 wt %, TiO2 ≤ 0.50 wt %, and MgO ≤14 wt %. The temperature of the primary magma could be equal to 1390°C. At a lower pressure (below 6.5 kbar), the obtained melt becomes more siliceous. In the Monchegorsk intrusion, the composition of intratelluric olivine according to this model could vary within 88–92 mol % Fo. The content of intratelluric olivine in the melt, depending on pressure, could vary from 11 to 24 vol %. Magmas that formed the Monchegorsk intrusion and the layered series of the Monchetundra intrusion (hole 742) were derived from different sources.",

keywords = "cumulates, geochronological age, magma, melt, micrograined rocks, Monchegorsk and Monchetundra layered massifs, Monchegorsk and Monchetundra layered massifs, cumulates, geochronological age, micrograined rocks, melt, magma",

author = "Semenov, {V. S.} and Kazanov, {O. V.} and Korneev, {S. I.} and Salnikova, {E. B.} and Semenov, {S. V.}",

note = "Publisher Copyright: {\textcopyright} 2022, Pleiades Publishing, Ltd.",

year = "2022",

month = jul,

day = "24",

doi = "10.1134/s0869591122030079",

language = "English",

volume = "30",

pages = "369--391",

journal = "Petrology",

issn = "0869-5911",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "4",

}

RIS

TY - JOUR

T1 - Conditions of Formation of Layered Intrusions of the Monchegorsk Magmatic Cluster

AU - Semenov, V. S.

AU - Kazanov, O. V.

AU - Korneev, S. I.

AU - Salnikova, E. B.

AU - Semenov, S. V.

PY - 2022/7/24

Y1 - 2022/7/24

N2 - The paper presents geochronological data and results of petrological modeling of the Monchegorsk and Monchetundra layered massifs. The U-Pb ID-TIMS zircon dating of norite from the marginal zone of Mt. Nittis yielded 2506 ± 7 Ma, which coincides with previous data on similar rocks from other areas. Based on the comparison of sections of the Monchegorsk and Kivakka massifs, the pre-erosion thickness of the Monchegorsk massif is estimated as 3700 m. Calculations using rocks of the marginal zone of the Monchegorsk intrusion at a pressure of 6.5–5.5 kbar showed that the melt in equilibrium with Ol contained SiO2 ≤ 55 wt %, TiO2 ≤ 0.50 wt %, and MgO ≤14 wt %. The temperature of the primary magma could be equal to 1390°C. At a lower pressure (below 6.5 kbar), the obtained melt becomes more siliceous. In the Monchegorsk intrusion, the composition of intratelluric olivine according to this model could vary within 88–92 mol % Fo. The content of intratelluric olivine in the melt, depending on pressure, could vary from 11 to 24 vol %. Magmas that formed the Monchegorsk intrusion and the layered series of the Monchetundra intrusion (hole 742) were derived from different sources.

AB - The paper presents geochronological data and results of petrological modeling of the Monchegorsk and Monchetundra layered massifs. The U-Pb ID-TIMS zircon dating of norite from the marginal zone of Mt. Nittis yielded 2506 ± 7 Ma, which coincides with previous data on similar rocks from other areas. Based on the comparison of sections of the Monchegorsk and Kivakka massifs, the pre-erosion thickness of the Monchegorsk massif is estimated as 3700 m. Calculations using rocks of the marginal zone of the Monchegorsk intrusion at a pressure of 6.5–5.5 kbar showed that the melt in equilibrium with Ol contained SiO2 ≤ 55 wt %, TiO2 ≤ 0.50 wt %, and MgO ≤14 wt %. The temperature of the primary magma could be equal to 1390°C. At a lower pressure (below 6.5 kbar), the obtained melt becomes more siliceous. In the Monchegorsk intrusion, the composition of intratelluric olivine according to this model could vary within 88–92 mol % Fo. The content of intratelluric olivine in the melt, depending on pressure, could vary from 11 to 24 vol %. Magmas that formed the Monchegorsk intrusion and the layered series of the Monchetundra intrusion (hole 742) were derived from different sources.

KW - cumulates

KW - geochronological age

KW - magma

KW - melt

KW - micrograined rocks

KW - Monchegorsk and Monchetundra layered massifs

KW - Monchegorsk and Monchetundra layered massifs, cumulates, geochronological age, micrograined rocks, melt, magma

UR - http://www.scopus.com/inward/record.url?scp=85134624416&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/07b99c6e-da80-3784-b9c3-40558b4c9626/

U2 - 10.1134/s0869591122030079

DO - 10.1134/s0869591122030079

M3 - Article

AN - SCOPUS:85134624416

VL - 30

SP - 369

EP - 391

JO - Petrology

JF - Petrology

SN - 0869-5911

IS - 4

ER -

ID: 98218344