Stable isotope geochemistry of sulfides from intrusion in Monchegorsk, northern part of Baltic Shield

Huber, Miłosz; Hałas, Stanisław; Neradovsky, Yuri N.; Bayanova, T. B.; Mokrushin, Artem W.; Lata, Lesia

doi:10.1515/geochr-2015-0034

Cited by 7 publications

(7 citation statements)

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“…Their position has been the subject of dispute for many researchers, who have emphasized their features indicating both crystallization during the mixing phase of alkali melts with supracrustal material and later [86]. Isotopic studies of these minerals indicate that they were generally formed by fluid crystallization from the Earth's mantle, although some crystallize later, as also evidenced by δ 13 C values in carbonates [11,89,107] and δ 34 S sulfides [108][109][110][111]. This is also confirmed by data obtained by other researchers.…”

Section: Discussionmentioning

confidence: 99%

Optical and Spectroscopic Properties of Lorenzenite, Loparite, Perovskite, Titanite, Apatite, Carbonates from the Khibiny, Lovozero, Kovdor, and Afrikanda Alkaline Intrusion of Kola Peninsula (NE Fennoscandia)

et al. 2022

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This manuscript deals with the analysis of significant rare earth elements (REE) minerals such as eudialyte, lorenzenite, loparite, perovskite, titanite, apatite, and carbonates. These minerals are found in the rocks of the Khibiny, Lovozero, Afrikanda, and Kovdor massifs (the Paleozoic hotspot activity in the Kola-Karelian Alkaline Province is estimated at about 100,000 km2). Performed microscopic analyses that demonstrated their structure and optical features (dimming, interference colors, relief). Single-crystal analysis using XRD methods, SEM-EDS, and spectroscopic (FTIR) studies allowed the characteristics of described minerals: Lorenzenite in Lovozero probably crystalized after loparite have small additions of Nb, La, Ce, Pr, and Nd. Loparite and perovskite have the addition of Ce, Nb, and Ta. The same dopants have titanite probably crystalized after perovskite. Calcite in these massifs had the addition of Ce and Sr, the same as in fluorapatite, which was found in these rocks too. All of the analyzed minerals are REE-bearing and can be considered as deposits.

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Section: Discussionmentioning

confidence: 99%

Optical and Spectroscopic Properties of Lorenzenite, Loparite, Perovskite, Titanite, Apatite, Carbonates from the Khibiny, Lovozero, Kovdor, and Afrikanda Alkaline Intrusion of Kola Peninsula (NE Fennoscandia)

et al. 2022

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“…The obtained isotope-geochronological data combined with results of previous geochemical, petrological, and mineralogical studies of the complex [43][44][45][46][47][72][73][74] allow referring it to the vast Paleoproterozoic East Scandinavian LIP, which is associated with rich deposits of strategic mineral raw materials (i.e., Cr, Cu-Ni-Co and PGE) [1][2][3][4][5][6][12][13][14][15][16][17][18][19][21][22][23][24][25][26][27][29][30][31][32][33][34][35][36][37][38][39]41,42,54,87,[89][90][91][92]94].…”

Section: Discussionmentioning

confidence: 99%

“…Plot for εNd(T) vs T for layered intrusions (2.53-2.39 Ga) in the Fennoscandian Shield and Pados-Tundra complex. Isotope data from[3][4][5][11][12][13]15,16,19,[21][22][23][24][25][26][28][29][30][31][32][33][35][36][37][38][39]41,87,[89][90][91][92][93][94].…”

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confidence: 99%

Metallogenic Setting and Evolution of the Pados-Tundra Cr-Bearing Ultramafic Complex, Kola Peninsula: Evidence from Sm–Nd and U–Pb Isotopes

et al. 2020

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The article presents new Sm–Nd and U–Pb geochronological data on rocks of the poorly studied Pados-Tundra Cr-bearing complex. It is part of the Notozero mafic–ultramafic complex (western Kola Peninsula) and occurs at the border of the Paleoproterozoic Lapland Granulite Belt and the Archean Belomorian composite terrain. The Pados-Tundra complex hosts two major zones, the Dunite and Orthopyroxenite Blocks. Dunites are associated with four levels of chromite mineralization. Isotope Sm–Nd studies of dunites, harzburgites, and orthopyroxenites from the central part of the complex have been carried out. The isochron Sm–Nd age on 11 whole-rock samples from a rhythmically layered series of the complex is 2485 ± 38 Ma; the mineral Sm–Nd isochron for harzburgites shows the age of 2475 ± 38 Ma. It corresponds with the time of large-scale rifting that originated in the Fennoscandian Shield. When the rhythmically layered series of the intrusion and its chromite mineralization were formed, hornblendite dykes intruded. The U–Pb and Sm–Nd research has estimated their age at ca. 2080 Ma, which is likely to correspond with the occurrence of the Lapland–Kola Ocean. According to isotope Sm–Nd dating on metamorphic minerals (rutile, amphibole), the age of postmetamorphic cooling of rocks in the complex to 650–600 °C is 1872 ± 76 Ma. The U–Pb age on rutile from a hornblendite dyke (1804 ± 10 Ma) indicates further cooling to 450–400 °C. The conducted research has determined the early Proterozoic age of rocks in the rhythmically layered series in the Pados-Tundra complex. It is close to the age of the Paleoproterozoic ore magmatic system in the Fennoscandian Shield that developed 2.53–2.40 Ga ago. Later episodes of alterations in rocks are directly related to main metamorphic episodes in the region at the turn of 1.9 Ga. Results of the current study expand the geography of the vast Paleoproterozoic East Scandinavian Large Igneous Province and can be applied for further studies of similar mafic–ultramafic complexes.

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“…The metavulcanites found in the Kandalaksha region were established as 2.4-2.7 Ga years old (Barbey et al 1984); Bridguoter et al 1999;Huber et al 2013). Their protolith was extrusion-lava compositions of today's andesites and basalts (Huber 2001;Kozlov et al 1995;Mints et al 1999).…”

Section: Geological Structurementioning

confidence: 99%

Geoheritage of the Kandalaksha region (Kola Peninsula, White Sea, Arctic Russia), Evaluation, and Geotourism Opportunities

Huber

Galina²,

Mariya³

et al. 2022

Geoheritage

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The subarctic Kandalaksha region abounds in many tourist values and is notably characterized by a richness of geology, nature, history, and landscape. Its mountains are located directly on the coast of the White Sea. The skerry-fiord coast is the habitat of many seabirds that nest on its many islands. There is also large mammals such as seals and bears. The coastal area and islands are a reserve within the National Park that was established to protect the breeding areas of the seabirds. Despite its location near the Arctic Circle, the area has a relatively mild climate. Many of the villages and towns in the area have a centuries-old history inextricably linked to the indigenous peoples (Karelians, Sami) who inhabited the area, as well as to the “Pomors,” the first Russian colonizers of the area. On top of this, this is a location with an environment that contains numerous examples of flora and fauna, as well as a geologically and geomorphologically interesting landscape connected with glaciation, abrasion, and isostatic movements. Here, the geological substrate, made up of Paleoproterozoic collisional structures of the Lapland Granulite Belt, was repeatedly tectonically rejuvenated within the forming aulacogen of the White Sea and the Kola-Lapland Mobile Belt, along with numerous Paleozoic intrusions of kimberlite and alkaline rocks. The youngest processes are associated with Pleistocene glaciation and isostatic relaxation in the Holocene. All these features contribute to the high tourist potential of the area. At present, it is being developed in a more or less organized way with the participation of private capital. This article presents a proposal for the systematic development of the area in question and the formalization of tourist routes in the area. This article aims to meet this need by proposing a tourist trail in the Kandalaksha area so as to enable tourists to explore this remarkable area.

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Stable isotope geochemistry of sulfides from intrusion in Monchegorsk, northern part of Baltic Shield

Cited by 7 publications

References 4 publications

Optical and Spectroscopic Properties of Lorenzenite, Loparite, Perovskite, Titanite, Apatite, Carbonates from the Khibiny, Lovozero, Kovdor, and Afrikanda Alkaline Intrusion of Kola Peninsula (NE Fennoscandia)

Optical and Spectroscopic Properties of Lorenzenite, Loparite, Perovskite, Titanite, Apatite, Carbonates from the Khibiny, Lovozero, Kovdor, and Afrikanda Alkaline Intrusion of Kola Peninsula (NE Fennoscandia)

Metallogenic Setting and Evolution of the Pados-Tundra Cr-Bearing Ultramafic Complex, Kola Peninsula: Evidence from Sm–Nd and U–Pb Isotopes

Geoheritage of the Kandalaksha region (Kola Peninsula, White Sea, Arctic Russia), Evaluation, and Geotourism Opportunities

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