The 1.80–1.74-Ga gabbro–anorthosite–rapakivi Korosten Pluton in the Ukrainian Shield: a 3-D geophysical reconstruction of deep structure

Bogdanova, Svetlana; Pashkevich, І. K.; Buryanov, V. B.; Makarenko, I. B.; Оrlyuk, М.І.; Skobelev, V. M.; Starostenko, V. I.; Legostaeva, О. V.

doi:10.1016/j.tecto.2003.10.023

Cited by 36 publications

(18 citation statements)

References 20 publications

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“…the crustal tongue melting model of Duchesne et al, 1999). As shown by Bogdanova et al (2004), the crust beneath the KPC is marked by an elevated Moho (beneath the KPC the Moho discontinuity occurs at a depth of 38-39 km, whereas in the surrounding areas it is located at depths between 42 and 52 km), and in comparison with the ambient areas (Fig. 12), the crust is less dense and less magnetic.…”

Section: Model Of Formation Of the Ukrainian Amcg Complexesmentioning

confidence: 94%

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The origin of the Palaeoproterozoic AMCG complexes in the Ukrainian shield: New U-Pb ages and Hf isotopes in zircon

Shumlyanskyy¹,

Hawkesworth

Billström

et al. 2017

Precambrian Research

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Section: Model Of Formation Of the Ukrainian Amcg Complexesmentioning

confidence: 94%

“…The KPC and KNPC occur as large igneous bodies (over 10 400 and 5 500 km 2 , respectively) that extend down to mid-crustal levels, and perhaps to the mantle-crust boundary as evidenced by an extensive set of geophysical data (Bogdanova et al, 2004).…”

Section: Duration Of the Amcg Magmatism And Its Relation To The Coevamentioning

confidence: 99%

The origin of the Palaeoproterozoic AMCG complexes in the Ukrainian shield: New U-Pb ages and Hf isotopes in zircon

Shumlyanskyy¹,

Hawkesworth

Billström

et al. 2017

Precambrian Research

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“…The Korosten Pluton occupies about 12,500 km 2 of the northwestern part of the Ukrainian shield. It contains three massif-type anorthosites and associated rocks, which were emplaced between 1800 and 1740 Ma (see the review of Bogdanova et al, 2004). In this province, the Fedorivka layered intrusion has significant potential for Fe-Ti ores .…”

Section: Spatial and Temporal Distributionmentioning

confidence: 99%

“…The ascent of the plagioclase crystal mush from the upper part of the deep magma chamber results from gravitational instability due to its low density relative to the crust. Even though the emplacement of an anorthositic massif by simple vertical diapirism has been successfully modeled (Barnichon et al, 1999), the intrusions are probably favored by zones of crustal weakness such as major lineaments (Corrigan and Hanmer, 1997;Scoates and Chamberlain, 1997;Duchesne et al, 1999;Ryan, 2000;Bogdanova et al, 2004). The polybaric crystallization of anorthosites is largely deduced from the occurrence of high-alumina orthopyroxene megacrysts (HAOM) containing plagioclase exsolutions (Emslie, 1975).…”

Section: Crystallization Conditions Of Anorthositesmentioning

confidence: 99%

“…However, most anorthosite provinces seem to be associated with major lineaments (Corrigan and Hanmer, 1997;Scoates and Chamberlain, 1997;Duchesne et al, 1999;Ryan, 2000;Bogdanova et al, 2004), and a consensus is emerging that anorthosites were emplaced in continental arc environments in a post-collisional regime Zhang et al, 2007;Vander Auwera et al, 2011;Bybee et al, 2014).…”

Section: Crystallization Conditions Of Anorthositesmentioning

confidence: 99%

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Fe–Ti–V–P ore deposits associated with Proterozoic massif-type anorthosites and related rocks

Charlier

Namur

Bolle

et al. 2015

Earth-Science Reviews

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a b s t r a c t a r t i c l e i n f oMagmatic rocks containing economic concentrations of iron, titanium, vanadium and phosphorous are commonly associated with massif-type anorthosites and related rocks. This rock association is part of the anorthositemangerite-charnockite-(rapakivi-)granite suites that are restricted to the Proterozoic. Understanding the geochemistry and emplacement mechanisms of ilmenite, magnetite and apatite ore deposits is crucial for exploration, efficient mining operations and ore processing. This review discusses the controlling factors on the grade of an ore, its mineralogy, and its major and trace element distribution. We present petrogenetic models of currently mined deposits (Lac Tio, Tellnes, Damiao) and discuss the characteristics of minor ore bodies from anorthosite provinces worldwide (Grenville, North China Craton, East European Craton, Rogaland, Laramie). Models of formation of anorthosite and related rocks are presented, as well as the nature of the possible parental magmas of the suite. A mineralogical classification of Fe-Ti ores is proposed: (1) Gabbro-noritic ilmenite ore ± apatite ± magnetite; (2) Ti-magnetite-dominated ore; (3) Nelsonite (Fe-Ti oxides + apatite); and (4) Rutile-ilmenite ore. The stability of ilmenite and magnetite is then critically reviewed and the influence of various factors, particularly oxygen fugacity and crystallization pressure, is examined. We discuss liquidus compositions of Fe-Ti oxides and the behavior of important trace elements such as Cr and V, both of which are sensitive to fO 2 variations. Postcumulus evolution of both oxides can occur due to re-equilibration with trapped liquid, re-equilibration with ferromagnesian silicates, exsolution, oxidation, reaction between ilmenite and magnetite, and metamorphic overprinting. These various processes are described and their effects on the oxide geochemistry are emphasized. Several potential ore-forming processes have been invoked and can explain the formation of huge concentration of ilmenite, ±magnetite, ±apatite. Fractional crystallization can be combined with crystal sorting and plagioclase buoyancy to produce relative enrichment of dense ore minerals. Silicate liquid immiscibility can segregate conjugate Si-rich and Fe-rich melts, the latter being enriched in Fe-Ti-P. Magma mixing can produce hybrid magmas located in a single-phase field of the phase diagram and precipitate a pure ilmenite cumulate. Alternative processes are also described, such as ejection of Fe-Ti-enriched residual melts by filter-pressing and compaction, solidstate remobilization of ilmenite in veins, and hydrothermal transport of Fe and Ti from the host anorthosite followed by concentration in veins and lenticular ore bodies. The magnetic properties of Fe-Ti ore deposits present contrasting signatures, depending on whether the natural remanent magnetization is dominated by hemo-ilmenite or multi-domain magnetite. Micro-and macro-scale deformation features of ore rocks are intimately correlated with magma emplacement, and...

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A Composite Structure of the Bashkir Anticlinorium: Insights from Detrital Zircons Search in Ordovician Sandstones of the Uraltau Uplift, Southern Urals

Кузнецов

Romanyuk

Белоусова

2021

Geological and Geo-Environmental Processes on Earth

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The 1.80–1.74-Ga gabbro–anorthosite–rapakivi Korosten Pluton in the Ukrainian Shield: a 3-D geophysical reconstruction of deep structure

Cited by 36 publications

References 20 publications

The origin of the Palaeoproterozoic AMCG complexes in the Ukrainian shield: New U-Pb ages and Hf isotopes in zircon

The origin of the Palaeoproterozoic AMCG complexes in the Ukrainian shield: New U-Pb ages and Hf isotopes in zircon

Fe–Ti–V–P ore deposits associated with Proterozoic massif-type anorthosites and related rocks

A Composite Structure of the Bashkir Anticlinorium: Insights from Detrital Zircons Search in Ordovician Sandstones of the Uraltau Uplift, Southern Urals

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