Basal Platinum-Group Element Mineralization in the Federov Pansky Layered Mafic Intrusion, Kola Peninsula, Russia

Schissel, Don; Tsvetkov, A. A.; Mitrofanov, F. P.; Korchagin, Alexei U.

doi:10.2113/gsecongeo.97.8.1657

Cited by 50 publications

(48 citation statements)

References 17 publications

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“…Hence, we may conclude from our isotope data that the magmatic process in the F-P massif was multistage. In contrast to our results, the sulfur isotopic composition published by Schissel et al (2002) are significantly scattered, most likely due to lower precision of isotope analysis (0.3‰). Both the deposit and host rocks strata have been affected by regional type of metamorphism of the green facies, which is confirmed by presence of albitechlorite association and, grossularite.…”

Section: Resultscontrasting

confidence: 99%

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Petrology of Gabbroides and Isotope Signature of Sulfide Mineralization from Fedorov-Pansky Layered Mafic Intrusion, Kola Peninsula, Russia

2009

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Samples from Fiodoro-Pansky massif were investigated by polarized light microscopy, EDS electron microscopy and isotope ratio mass spectrometry. We have observed four-stage ore mineralization: (1) magmatic Fe-Ti-oxides, (2) sulfide-ferrous oxide, (3) hydrothermal Cu-Ni-sulfide with haycokite, talnakhite and galena admixture, (4) tiosulfates formed from pyrrhotite. A few sulfide samples from generations (2) and (4) were investigated isotopically. The second generation is isotopically homogenous with δ 34 S close to zero, whilst the third generation shows significantly negative δ 34 S values.

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Section: Resultscontrasting

confidence: 99%

“…The massif consists of layered mafic intrusions of gabbroide rocks. The age of this intrusions ranges from 2501 to 2446 Ma (Latypov and Chistyakova, 2000;Schissel et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Petrology of Gabbroides and Isotope Signature of Sulfide Mineralization from Fedorov-Pansky Layered Mafic Intrusion, Kola Peninsula, Russia

2009

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“…General'skaya, Monchegorsk Layered Complex, Fedorovo-Pansky etc. ) are confined to boundaries between Early Proterozoic rifts which were in-filled with volcano-sedimentary rocks overlying the Archaean basement (Schissel et al, 2002;Mitrofanov et al, 2005). In these cases, similar to those in Finland, the intrusive rocks underwent relatively low grade local metamorphism and preserve cumulus and intracumulus minerals.…”

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confidence: 99%

“…In Finland, these geological complexes have been widely studied (Alapieti et al, 1990;Huhma et al, 1990;Vogel et al, 1998;Hanski et al, 2001), and the data were summarized by M. Iljina and E. Hanski (2005). Only a few publications on similar Russian complexes of the Baltic Shield have been written or translated into English (Papunen & Gorbunov et al, 1985;Balashov et al, 1993;Bayanova & Balashov, 1995;Amelin et al, 1995;Mitrofanov et al, 1997;Mitrofanov & Bayanova, 1999;Chashchin et al, 2002;Schissel et al, 2002;Mitrofanov et al, 2005). This paper presents a brief geological description of the Russian mafic-ultramafic intrusions of the Baltic Shield and associated mineralization.…”

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confidence: 99%

Timing and duration of Palaeoproterozoic events producing ore-bearing layered intrusions of the Baltic Shield: metallogenic, petrological and geodynamic implications

Bayanova

Ludden

Mitrofanov

2009

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There are two 300-500-km long belts of Palaeoproterozoic layered intrusions: the Northern (Kola) Belt and the Southern (Fenno-Karelian) Belt in the Baltic (Fennoscandian) Shield. New U-Pb (TIMS) ages and radiogenic isotopic (Nd-Sr-He) data have been determined for mafic-ultramafic Cu-Ni-Ti-Cr and PGEbearing layered intrusions of the Kola Belt. U-Pb ages on zircon and baddeleyite for gabbronorite and anorthosite from the Fedorovo-Pansky, Monchepluton and Main Ridge (Monchetundra and Chunatundra), Mt. Generalskaya intrusions and gabbronorite and dykes from the Imandra lopolith of the Kola Belt define a time interval of more than 130 million years, from ca. 2.52 Ga to 2.39 Ga. At least four intrusive phases have been distinguished: three PGE-bearing, and one barren. This spread of ages is wider than that for intrusions of the Fenno-Karelian Belt which clusters at 2.44 Ga. Nd isotopic values for the Northern Belt range from -1.1 to -2.4, implying an enriched mantle "EM-1 type" reservoir for these layered intrusions. Initial Sr isotopic data for the rocks of the intrusions are radiogenic relative to bulk mantle, with I Sr values from 0.703 to 0.704. Geochemical data and 4 He / 3 He isotopic ratios of the minerals reflect a significant contribution from a mantle source rather than the influence of crustal processes during emplacement. The geological and geochronological data indicate that in the eastern part of the Baltic Shield, mafic -ultramafic intrusive magmatism was active over a protracted period and was related to plume magmatism associated with continental breakup that also involved the Superior and Wyoming provinces.Key words: geochronology, isotopes, Palaeoproterozoic, layered PGE-bearing intrusions, BalticShield.There are about twenty Palaeoproterozoic layered mafic-ultramafic bodies in Finland, most of which occur in a roughly eastwest-trending, 300-km long belt known as the Tornio-NäränkävaaraBelt (Alapieti et al., 1990;Vogel et al., 1998;Iljina & Hanski, 2005). The belt ( Fig. 1) extends for a few kilometres into Sweden (Tornio intrusion), and for several tens of kilometres into the Russian Karelia (Olanga complex). Together the intrusions make up the Southern, or Fenno-Karelian Belt -FKB (Mitrofanov et al., 1997).In the northeast of the province, the Northern, or Kola Belt (KB) strikes northwestwards for about 500 km (Fig.1). It includes more than ten isolated layered mafic-ultramafic bodies that are mostly ore-bearing (Mitrofanov et al., 1997). The central part of the Kola Belt has been suggested to be part of a triple junction typical of intraplate rifting (Pirajno, 2007), and is occupied by the Monchegorsk Layered Complex with a fairly complete range of ore types (Cr, Cu, Ni, Co, Ti, V, Pt, Pd, Rh). The western and eastern arms of the triple junction are composed of large anorthositetroctolite (Main Ridge, Pyrshin, Kolvitsa) intrusions (Fig. 1). The most typical PGE-bearing layered pyroxenite-norite-gabbro-anorthosite intrusions of the Kola Belt (Mt. General'skaya, Monchegorsk Layered Complex...

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“…Тектоническими нарушениями комплекс разбит на четыре блока, рас сматриваемых в качестве самостоятельных массивов: Федорова тундра, Ластъяврский, ЗападноПанский и ВосточноПанский [Schissel et al, 2002] (рис. 4).…”

Section: интрузивный магматизм ивсunclassified

The Paleoproterozoic Imandra-Varzuga rifting structure (Kola Peninsula): intrusive magmatism and minerageny

Chashchin¹,

Mitrofanov²

2014

Geodyn. Tectonophys.

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The article provides data on the structure of the Paleoproterozoic intercontinental ImandraVarzuga rifting structure (IVS) and compositions of intrusive formations typical of the early stage of the IVS development and associated mineral resources. IVS is located in the central part of the Kola region. Its length is about 350 km, and its width varies from 10 km at the flanks to 50 km in the central part. IVS contains an association of the sedimentaryvolcanic, intrusive and dyke com plexes. It is a part of a large igneous Paleoproterozoic province of the Fennoscandian Shield spreading for a huge area (about 1 million km 2 ), which probably reflects the settings of the head part of the mantle plume. Two age groups of layered intru sions were associated with the initial stage of the IVS development. The layered intrusions of the FedorovoPansky and Monchegorsk complexes (about 2.50 Ga) are confined to the northern flank and the western closure of IVS, while intrusions of the Imandra complex (about 2.45 Ga) are located at the southern flank of IVS. Intrusions of older complexes are composed of rock series from dunite to gabbro and anorthosites (Monchegorsk complex) and from orthopyroxenite to gabbro and anor thosites (FedorovoPansky complex). Some intrusions of this complexes reveal features of multiphase ones. The younger Imandra complex intrusions (about 2.45 Ga) are stratified from orthopyroxenite to ferrogabbro. Their important feature is comagmatical connection with volcanites. All the intrusive complexes have the boninitelike mantle origin enriched by litho phyle components. Rocks of these two complexеs with different age have specific geochemical characteristics. In the rocks of the Monchegorsk and FedorovoPansky complexes, the accumulation of REE clearly depends on the basicity of the rocks, the spectrum of REE is nonfractionated and 'flat', and the Eu positive anomaly is slightly manifested. In the rocks of the Imandra complex, the level of REE accumulation is relatively higher. The spectrum of REE here differs with more fraction ated LREE with a 'flat' distribution of HREE and distinct Eu anomalies. Rocks of all the intrusive complexes are character ized mostly by negative ε Nd (T) values, and ε Nd values are distributed more heterogeneously in the rocks of the Monchegorsk complex than in the rocks of the FedorovoPansky complex. Deposits and occurrences of Cr, complex PGECuNi and low sulfide PtPd ores of the world class are spatially related and genetically associated with the IVS intrusive complexes. The Sopcheozero deposit (Monchepluton of the Monchegorsk complex) and Bolshaya Varaka deposit (the samename intrusion of the Imandra complex) represent a layered Cr mineralization. Complex PGECuNi deposits are confined to Monchepluton. They occur in vein ores of the NittisKumuzhyaTravyanaya massifs (which have been worked out) and Sopcha, vein PGE Cu, injecting Ni ores mostly and bottom deposits of the NittisKumuzhyaTravyanaya massifs, as well as in the Nyud 'criti cal' horizon. In the past 10-15 year...

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Basal Platinum-Group Element Mineralization in the Federov Pansky Layered Mafic Intrusion, Kola Peninsula, Russia

Cited by 50 publications

References 17 publications

Petrology of Gabbroides and Isotope Signature of Sulfide Mineralization from Fedorov-Pansky Layered Mafic Intrusion, Kola Peninsula, Russia

Petrology of Gabbroides and Isotope Signature of Sulfide Mineralization from Fedorov-Pansky Layered Mafic Intrusion, Kola Peninsula, Russia

Timing and duration of Palaeoproterozoic events producing ore-bearing layered intrusions of the Baltic Shield: metallogenic, petrological and geodynamic implications

The Paleoproterozoic Imandra-Varzuga rifting structure (Kola Peninsula): intrusive magmatism and minerageny

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