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Evgenii V. Sharkov
Russian Academy of Sciences
86Publications
14H-index
694Citations
Publications 86
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#1Evgenii V. Sharkov (RAS: Russian Academy of Sciences)H-Index: 14
#2A. V. Chistyakov (RAS: Russian Academy of Sciences)H-Index: 6
Last.P. V. Frolov (RAS: Russian Academy of Sciences)
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The Tiksheozero ultramafic–alkaline–carbonatite intrusive complex, like numerous carbonatite-bearing complexes of similar composition, is a part of a large igneous province related to the ascent of a thermochemical mantle plume. The geochemical and isotopic data indicate that the formation of the ultramafic and alkaline rocks was related to crystallization differentiation of a primary alkali picritic melt, whereas carbonatite magmas were derived from an independent mantle source. We suggest that...
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#1Evgenii V. Sharkov (RAS: Russian Academy of Sciences)H-Index: 14
#2A. V. Chistyakov (RAS: Russian Academy of Sciences)H-Index: 6
Last.P. V. Frolov (RAS: Russian Academy of Sciences)
view all 5 authors...
Magmatic oxide mineralization widely developed in syenite–gabbro intrusive complexes is an important Fe and Ti resource. However, its origin is hotly debatable. Some researchers believe that the oxide ores were formed through precipitation of dense Ti-magnetite in an initial ferrogabbroic magma (Bai et al., 2012), whereas others consider them as a product of immiscible splitting of Fe-rich liquid during crystallization of Fe–Ti basaltic magma (Zhou et al., 2013). We consider this problem with a ...
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#1Maria M. Bogina (RAS: Russian Academy of Sciences)H-Index: 4
#2V. Zlobin (RAS: Russian Academy of Sciences)
Last.A. V. Chistyakov (RAS: Russian Academy of Sciences)H-Index: 6
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Compositional peculiarities of the siliceous high-Mg series (SHMS) rocks formed at the Archean–Paleoproterozoic boundary as a function of plume activity are discussed using example of Early Paleoproterozoic mafic volcanic rocks of the Vodlozero Domain, Fennoscandian Shield. These rocks are characterized by wide variations in Mg# (from 33 to 67) and Cr contents (from 25 to 1123 ppm), LREE enrichment, and weakly negative eNd (from –0.7 to –2.9). The high Gd/Yb ratio in the primitive high-Mg rocks ...
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#1Vural Oyan (Yüzüncü Yıl University)H-Index: 7
#2Mehmet Keskin (Istanbul University)H-Index: 15
Last.Esin Unal (Yüzüncü Yıl University)H-Index: 3
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11 CitationsSource
#1Leonid Aranovich (RAS: Russian Academy of Sciences)H-Index: 7
#2N. S. Bortnikov (RAS: Russian Academy of Sciences)H-Index: 9
Last.Sergey G Skolotnev (RAS: Russian Academy of Sciences)H-Index: 7
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The paper presents newly obtained original data on the morphology, internal structure (as seen in cathodoluminescence images, CL), and composition of more than 400 zircon grains separated from gabbroids and plagiogranites (OPG) sampled at the axial zone of the Mid-Atlantic Ridge (MAR). The zircons were analyzed for REE by LA-ICP-MS and for Hf, U, Th, Y, and P by EPMA. Magmatic zircon in the gabbroids crystallized from differentiating magmatic melt in a number of episodes, as follows from systema...
3 CitationsSource
#1Evgenii V. SharkovH-Index: 14
#2Maria M. BoginaH-Index: 4
Last.A. V. ChistyakovH-Index: 6
view all 3 authors...
Large igneous provinces (LIPs) formed by mantle superplume events have irreversibly changed their composition in the geological evolution of the Earth from high-Mg melts (during Archean and early Paleoproterozoic) to Phanerozoic-type geochemically enriched Fe-Ti basalts and picrites at 2.3 Ga. We propose that this upheaval could be related to the change in the source and nature of the mantle superplumes of different generations. The first generation plumes were derived from the depleted mantle, ...
6 CitationsSource
#1Evgenii V. Sharkov (RAS: Russian Academy of Sciences)H-Index: 14
#2A. V. Chistyakov (RAS: Russian Academy of Sciences)H-Index: 2
The study of coronitic textures in ferrogabbros and data on rhythmic layering of the Elet’ozero Massif supports the existence of a specific low-temperature Fe-rich liquid in nature. This liquid was formed during solidification of intrusion owing to the local multiple accumulation of Fe and Ti contents in a parental Fe-rich Fe–Ti basaltic melt. According to obtained data, this occurred on micro- and macroscale: 1) in the interglanular (intercumulus) space of the crystallization zone where intercu...
1 CitationsSource
#1Evgenii V. Sharkov (RAS: Russian Academy of Sciences)H-Index: 14
#2A. V. Chistyakov (RAS: Russian Academy of Sciences)H-Index: 2
Fe–Ti oxides (magnetite, Ti-magnetite, ilmenite, and associated high-Al spinel) in the ferrogabbroids of the Middle Paleoproterozoic Elet’ozero syenite–gabbro intrusion are intercumulus minerals usually surrounded by coronitic rims of two types. The first type usually represents multilayer amphibole–biotite ± olivine coronas along contacts of Fe–Ti oxides with cumulus moderate-Ca plagioclase and more rarely, clinopyroxene. Two-layer rim is developed in contact with high-Ca plagioclase; the inner...
2 CitationsSource
#1Evgenii V. Sharkov (RAS: Russian Academy of Sciences)H-Index: 14
#2O. A. Bogatikov (RAS: Russian Academy of Sciences)H-Index: 9
The problem of the Daly Gap is considered for the example of bimodal basalt–trachyte series and their intrusive analogs (layered syenite–gabbro intrusions). It is shown that the gap is not controlled by the processes of crystallization differentiation or liquid immiscibility in intermediate chambers of igneous systems (intrusive chambers) and has a primary nature. We interpret its origin as from the existence of two independent types of melts from the materials of head parts of the same mantle p...
3 CitationsSource
#1Vural Oyan (Yüzüncü Yıl University)H-Index: 7
#2Mehmet Keskin (Istanbul University)H-Index: 15
Last.Evgenii V. Sharkov (RAS: Russian Academy of Sciences)H-Index: 14
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Abstract The Pliocene Etrusk stratovolcano, located in the northeast of Lake Van (Eastern Anatolia; Turkey), is one of the important volcanic centres in the Eastern Anatolian collision zone. Mt. Etrusk overlies a widespread volcanic plateau, consisting of basaltic and hawaiitic lavas formed by fissure eruptions between 4.9–4.5 Ma. These basic lavas contain a phenocryst phase consisting of olivine, plagioclase and clinopyroxene. Trace element ratio diagrams imply that these basic magmas were gene...
24 CitationsSource
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