The Paleoproterozoic Kolvitsa Anorthosite Massif: New Data on the U–Pb Age (ID TIMS) and Geochemical Features of Zircon

Steshenko, Ekaterina; Nikolaev, A. I.; Bayanova, T. B.; Drogobuzhskaya, Svetlana; Chashchin, V. V.; Serov, Pavel; Lyalina, L. М.; Novikov, A.I.; Elizarov, D. V.

doi:10.1134/s1028334x18030224

Cited by 6 publications

(6 citation statements)

References 9 publications

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“…The estimated U-Pb age (2448 ± 5 Ma) of metagabbro from the Kolvitsa massif is considered magmatic due to low contents of U and Pb typical of magmatic zircons from basic rocks and spectra of REE distribution. The obtained U-Pb age is interpreted as the time of gabbro formation in the Kolvitsa massif [13] and is close to previously calculated ages of anorthosites from this massif [7,8].…”

Section: Discussionsupporting

confidence: 88%

“…The determination limits were in the range of 0.01 ppm when the diameter of the laser beam was 155 µm, which was in compliance with the available data [17][18][19]. The results were verified in interlaboratory cross-checks and analyses of internationally approved standard zircon samples 91500, TEMORA 1, and Mud Tank [11][12][13].…”

Section: La-icp-mssupporting

confidence: 83%

“…External calibration was carried out using NIST 612 glass with the known contents of REE, U, and Th of 40 ppm as a multipoint calibration forced through the origin after blank correction. The diameter of the laser beam was changed, while all of the rest parameters remained the same: From 35 µm to 240 µm (r = 0.999) [11][12][13]. Sample NIST SRM 610 with the content of 450 ppm was used to check the accuracy of data reduction [14][15][16].…”

Section: La-icp-msmentioning

confidence: 99%

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The Paleoproterozoic Kandalaksha-Kolvitsa Gabbro-Anorthosite Complex (Fennoscandian Shield): New U–Pb, Sm–Nd, and Nd–Sr (ID-TIMS) Isotope Data on the Age of Formation, Metamorphism, and Geochemical Features of Zircon (LA-ICP-MS)

2020

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The paper provides new U–Pb, Sm–Nd, and Nd–Sr isotope-geochronological data on rocks of the Paleoproterozoic Kandalaksha-Kolvitsa gabbro-anorthosite complex. Rare earth element (REE) contents in zircons from basic rock varieties of the Kandalaksha-Kolvitsa area were analyzed in situ using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Plots of REE distribution were constructed, confirming the magmatic origin of zircon. Temperatures of zircon crystallization were estimated using a Ti-in-zircon geochronometer. The U–Pb method with a 205Pb artificial tracer was first applied to date single zircon grains (2448 ± 5 Ma) from metagabbro of the Kolvitsa massif. The U–Pb analysis of zircon from anorthosites of the Kandalaksha massif dated the early stage of the granulite metamorphism at 2230 ± 10 Ma. The Sm–Nd isotope age was estimated on metamorphic minerals (apatite, garnet, sulfides) and whole rock at 1985 ± 17 Ma (granulite metamorphism) for the Kolvitsa massif and at 1887 ± 37 Ma (high-temperature metasomatic transformations) and 1692 ± 71 Ma (regional fluid reworking) for the Kandalaksha massif. The Sm–Nd model age of metagabbro was 3.3 Ga with a negative value of εNd = 4.6, which corresponds with either processes of crustal contamination or primary enriched mantle reservoir of primary magmas.

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Section: Discussionsupporting

confidence: 88%

Section: La-icp-mssupporting

confidence: 83%

Section: La-icp-msmentioning

confidence: 99%

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The Paleoproterozoic Kandalaksha-Kolvitsa Gabbro-Anorthosite Complex (Fennoscandian Shield): New U–Pb, Sm–Nd, and Nd–Sr (ID-TIMS) Isotope Data on the Age of Formation, Metamorphism, and Geochemical Features of Zircon (LA-ICP-MS)

2020

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“…Studying and applying Zr-Ti geochronometer for baddeleyite is considered important. New investigations yield higher temperatures of the baddeleyite grains formation and the U-Pb systematics closure (more than 10,000˚C), compared to zircon (less than 9000˚C) [20] [21] [22]. These newly obtained high temperatures of the U-Pb systematics closure and baddeleyite formation are close to other geochronometers, e.g.…”

Section: Discussionsupporting

confidence: 60%

“…[21] [22]. The NIST SRM 610 and NIST SRM 612[23] [24] [25] glasses are silicate glass reference materials produced by the National Institute of Standards and Technology.…”

mentioning

confidence: 99%

Baddeleyite from Large Complex Deposits: Significance for Archean-Paleozoic Plume Processes in the Arctic Region (NE Fennoscandian Shield) Based on U-Pb (ID-TIMS) and LA-ICP-MS Data

Bayanova¹,

Viktor²,

Drogobuzhskaya³

et al. 2019

OJG

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Baddeleyite is an important mineral geochronometer. It is valued in the U-Pb (ID-TIMS) geochronology more than zircon because of its magmatic origin, while zircon can be metamorphic, hydrothermal or occur as xenocrysts. Detailed mineralogical (BSE, KL, etc.) research of baddeleyite started in the Fennoscandian Shield in the 1990s. The mineral was first extracted from the Paleozoic Kovdor deposit, the second-biggest baddeleyite deposit in the world after Phalaborwa (2.1 Ga), South Africa. The mineral was successfully introduced into the U-Pb systematics. This study provides new U-Pb and LA-ICP-MS data on Archean Ti-Mgt and BIF deposits, Paleoproterozoic layered PGE intrusions with Pt-Pd and Cu-Ni reefs and Paleozoic complex deposits (baddeleyite, apatite, foscorite ores, etc.) in the NE Fennoscandian Shield. Data on concentrations of REE in baddeleyite and temperature of the U-Pb systematics closure are also provided. It is shown that baddeleyite plays an important role in the geological history of the Earth, in particular, in the break-up of supercontinents.

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The Kandalaksha-Kolvitsa gabbro-anorthosite complex: Nd-Sr isotope-geochronological evidence of its affinity to the East-Scandinavian Large Igneous Province

Steshenko

Serov

Kunakkuzin

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

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The article provides new Sm-Nd and Nd-Sr isotope-geochronological data on rocks of the Paleoproterozoic Kandalaksha-Kolvitsa gabbro-anorthosite complex. The isotope Sm-Nd dating on metamorphic minerals (apatite, garnet, sulfide) and rock of the Kolvitsa massif yielded the age of 1887±37 Ma (high-temperature metasomatic transformation) and 1692±71 Ma (regional fluid processing). The model Sm-Nd age of metagabbro is 3.3 Ga with a negative value of εNd=-5.5, which indicates processes of crustal contamination or primary enriched mantle reservoir of initial magmas. According to geochronological and Nd-Sr isotope data, rocks of the Kandalaksha-Kolvitsa complex seem to have a common anomalous mantle source with Paleoproterozoic layered intrusions in the Baltic Shield.

show abstract

The Paleoproterozoic Kolvitsa Anorthosite Massif: New Data on the U–Pb Age (ID TIMS) and Geochemical Features of Zircon

Cited by 6 publications

References 9 publications

The Paleoproterozoic Kandalaksha-Kolvitsa Gabbro-Anorthosite Complex (Fennoscandian Shield): New U–Pb, Sm–Nd, and Nd–Sr (ID-TIMS) Isotope Data on the Age of Formation, Metamorphism, and Geochemical Features of Zircon (LA-ICP-MS)

The Paleoproterozoic Kandalaksha-Kolvitsa Gabbro-Anorthosite Complex (Fennoscandian Shield): New U–Pb, Sm–Nd, and Nd–Sr (ID-TIMS) Isotope Data on the Age of Formation, Metamorphism, and Geochemical Features of Zircon (LA-ICP-MS)

Baddeleyite from Large Complex Deposits: Significance for Archean-Paleozoic Plume Processes in the Arctic Region (NE Fennoscandian Shield) Based on U-Pb (ID-TIMS) and LA-ICP-MS Data

The Kandalaksha-Kolvitsa gabbro-anorthosite complex: Nd-Sr isotope-geochronological evidence of its affinity to the East-Scandinavian Large Igneous Province

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