Igor Ashchepkov
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View article: Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry
Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry Open
Cr-bearing amphiboles frequently occur in the subcratonic lithospheric mantle of Siberian Craton particularly in northern kimberlite fields like West Ukukit, Kuranakh, Kuoika, Kharamai, as well as in the central part of Yakutia – in Alakit…
View article: Bulkur phreato-magmatic diamond deposits – new incites for origin from the geochemistry and thermobarometry.
Bulkur phreato-magmatic diamond deposits – new incites for origin from the geochemistry and thermobarometry. Open
The phreatomagmatic Carnian (Upper Triassic) kimberlitic tuff deposit of the Bulkur anticline at the right side of the Lena Mouth has the most high diamond grade in Russia (to 12 crt/t). Comparison of the thermobarometric reconstructions A…
View article: Trace elements in the black Pl bearing xenoliths in Quaternary basalts from Baikal rift. Implications to the origin of granites 
Trace elements in the black Pl bearing xenoliths in Quaternary basalts from Baikal rift. Implications to the origin of granites  Open
It is suggested that in the genesis of the large volumes of the granites of Angara-Vitim Batholiths and similar huge granite massifs the important role play the plume magmas which were the major supply of the heart. But they also could dir…
View article: Ca, Mn, Na admixtures in pyropes as indicator of the diamond grade in kimberlites
Ca, Mn, Na admixtures in pyropes as indicator of the diamond grade in kimberlites Open
 Triangular diagrams of pyrope compositions for minor elements – Mn, Na, Ti in wt%  are proposed to assess the diamond grade  of kimberlite pipes.. Basing on group cluster analysis, diagrams are constructed for pyropes…
View article: The 3000 km mantle transect through Angola and Congo based on diamond satellite minerals from kimberlites
The 3000 km mantle transect through Angola and Congo based on diamond satellite minerals from kimberlites Open
The 3000 km SSW-NNE mantle transect through all Congo craton (including Angola and Congo DR) was constructed based on EPMA analyses of diamond satellite minerals (DSM) from  kimberlites (and placers) using monomineral thermobarometry …
View article: PREDICTION OF THE PRIMARY SOURCES OF GIANT CLIPPIR DIAMONDS IN THE NORTH OF YAKUTIA BY THE METHOD OF MINERALOGICAL AND GEOCHEMICAL ANALOGY (METHOD 5E DIAGRAMS)
PREDICTION OF THE PRIMARY SOURCES OF GIANT CLIPPIR DIAMONDS IN THE NORTH OF YAKUTIA BY THE METHOD OF MINERALOGICAL AND GEOCHEMICAL ANALOGY (METHOD 5E DIAGRAMS) Open
The finds of giant CLIPPIR-type diamonds in the placers hosted by the Ebelyakh River basin in the north of Yakutia suggest that similar diamonds can be found in the kimberlites of the Anabar region and the nearest northern deposits located…
View article: Diamond-associated minerals of the Zarnitsa pipe: A method for predicting CLIPPIR diamonds in weakly diamondiferous kimberlites
Diamond-associated minerals of the Zarnitsa pipe: A method for predicting CLIPPIR diamonds in weakly diamondiferous kimberlites Open
The article considers the geochemistry of diamond-associated minerals of the Karowe (Botswana) and Zarnitsa (Russia) weakly diamondiferous pipes – deposits containing high-quality and costly giant CLIPPIR diamonds. There is applied a predi…
View article: Comparative mineralogy, geochemistry and petrology of the Beloziminsky Massif and its aillikite intrusions
Comparative mineralogy, geochemistry and petrology of the Beloziminsky Massif and its aillikite intrusions Open
Beloziminsky alkaline ultramafic carbonatite massif (BZM) includes carbonatites, ijolites, meltegites, syenites (CIMS) layers and bodies and aillikites intrusions (∼ 645 - 621 Ma) within massif and Yuzhnaya pipe (YuP), locating in 16 km ea…
View article: Trace element geochemistry of mantle xenoliths from Zarnitsa kimberlite pipe, Daldyn field, Yakutia: Complex history of melts interactions with lithospheric mantle
Trace element geochemistry of mantle xenoliths from Zarnitsa kimberlite pipe, Daldyn field, Yakutia: Complex history of melts interactions with lithospheric mantle Open
Mantle xenoliths from Zarnitsa pipe studied in gray eruptive breccias (early) brown autholitic breccia (BAB) and black macrocrystic kimberlites (last dike; BMK), include garnet and spinel dunites-harzburgites, pyroxenites, eclogites, glimm…
View article: Thermal state and nature of the lower crust in the Baikal Rift Zone: Insight from xenoliths of Cenozoic and Paleozoic magmatic rocks
Thermal state and nature of the lower crust in the Baikal Rift Zone: Insight from xenoliths of Cenozoic and Paleozoic magmatic rocks Open
Preliminary studied lower crust and Moho of Baikal Rift (BR) was investigated using pyroxenite xenoliths and xenocrysts from Cenozoic volcanoes to determine the structure, thermal conditions and composition of the transitional zone from th…
View article: Mantle xenoliths from Komsomolskaya kimberlite pipe, Yakutia: Multistage metasomatism
Mantle xenoliths from Komsomolskaya kimberlite pipe, Yakutia: Multistage metasomatism Open
Minerals from > 200 mantle xenoliths from Komsomolskaya kimberlite pipe were studied by electron microprobe and LA-ICP-MS. They are metasomatised garnet and spinel peridotites containing phlogopite, amphibole and ilmenite with garnets (up …
View article: The perspectives of finding of giant CLIPPIR-type diamonds in weakly diamondiferous kimberlites of the north of Yakutia (Western Anabar region) using method of 5E Mitchells’s diagrams and cluster analyses
The perspectives of finding of giant CLIPPIR-type diamonds in weakly diamondiferous kimberlites of the north of Yakutia (Western Anabar region) using method of 5E Mitchells’s diagrams and cluster analyses Open
Finding of the giant diamond in Ebelyakh of CLIPPIR type of IIa type (Moor, 2014) suggest that similar diamonds should be found in the source kimberlites in Anabar basing and nearest Northern fields located within collision Khapchan terrai…
View article: Analyze of the structural conditions of heat and mass transfer under volcanoes of the northwestern sector of the Pacific ocean- Eurasian continent transition
Analyze of the structural conditions of heat and mass transfer under volcanoes of the northwestern sector of the Pacific ocean- Eurasian continent transition Open
Based on the analysis of the tectonophysical characteristics of the actual seismofocal zone (SFZ) in the lithosphere of the Kuril-Kamchatka region and adjacent Oceanic areas,  we estimated the boundary conditions necessary for constru…
View article: The influence of the Siberian plume to the formation of Angaro-Vitim batholiths
The influence of the Siberian plume to the formation of Angaro-Vitim batholiths Open
The influence of the hot spot for the AVB was assumed by (Kuzmin and Yarmolyuk, 2011). It may be the same hot spot that cause the creation of the kimberlites at 420 Ma at the north of Siberian craton (Sun et al,, 2014; 2018) than in the ce…
View article: Thermal state and nature of the low crust in the Baikal Rift zone according to the lower crust xenoliths of Cenozoic volcanics and Paleozoic magmas. 
Thermal state and nature of the low crust in the Baikal Rift zone according to the lower crust xenoliths of Cenozoic volcanics and Paleozoic magmas.  Open
The lower crust and Moho pyroxenites and xenocrysts from Cenozoic volcanoes studied with the EPMA, SEM and LA ICP MS for trace elements evidence about the structure and composition of the transitional zone from the crust to mantle in Cenoz…
View article: Reconstructions of mantle structure beneath kimberlites of Anabar shield and surroundings – similarities and differences.
Reconstructions of mantle structure beneath kimberlites of Anabar shield and surroundings – similarities and differences. Open
Comparative study of the mantle xenocrysts from Anabar region (Ary-Mastakh, Dyuken, Orto-Yargyn fields) and Boomerang kimberlites and pipe show essential differences with the mantle in surrounding area from Olenek (Chomurdakh field)The PTX…
View article: Primary Composition of Kimberlite Melt
Primary Composition of Kimberlite Melt Open
The compositions (mineralogy, major- and trace-element chemistry of rocks and minerals, and Sr-Nd-Hf isotope systematics) of two kimberlite bodies, the Obnazhennaya pipe and the Velikan dyke from the Kuoika field, Yakutian kimberlite provi…
View article: Ascent rate of the Udachnaya-East kimberlite melts from olivine diffusion chronometry
Ascent rate of the Udachnaya-East kimberlite melts from olivine diffusion chronometry Open
Kimberlite melts are low volume, volatile-rich melts formed in the asthenosphere at depth >150-250 km. Due to their low viscosity and the exsolution of CO2 triggered by their interaction with the sub-cratonic mantle, these melts are highly…
View article: The Dynamics of Transformation of Lithospheric Mantle Rocks Beneath the Siberian Craton
The Dynamics of Transformation of Lithospheric Mantle Rocks Beneath the Siberian Craton Open
The problem of heat–mass transfer in the permeable areas above the asthenosphere zones was numerically studied based on an examination of the inclusion content in the minerals (olivine and clinopyroxenes) of igneous and metamorphic rocks o…
View article: Mineralogy and geochemistry of the kimberlite xenocrysts from the Anabar region, Yakutia, Russia
Mineralogy and geochemistry of the kimberlite xenocrysts from the Anabar region, Yakutia, Russia Open
Kimberlitic xenocrysts: garnets, pyroxenes, ilmenites, spinels from Anabar region were analyzed by EPMA and LAICPMS.Reconstructed mantle sections of t Anabar region published (Ashchepkov et al., 2001; 2016; 2019; 2022 show in general, the …
View article: Tracing of evolution of carbonatite and silicate melts of the Belo-Ziminsky alkaline-ultrabasic carbonatite massif by mineralogy and geochemistry
Tracing of evolution of carbonatite and silicate melts of the Belo-Ziminsky alkaline-ultrabasic carbonatite massif by mineralogy and geochemistry Open
The Belo-Ziminsky alkaline-ultrabasic carbonatite massif contain dolomite, and calcite ankerite carbonatites essential part , syenites, melteigites and iolites cut by aillikite dikes of several generations (Ashchepkov et al., 2020; Doroshk…
View article: New formulation of the olivine thermobarometer for mantle xenoliths
New formulation of the olivine thermobarometer for mantle xenoliths Open
The suggested olivin thermometry for mantle peridotite and zenolith (Hoog et al., 2010, Bussweller et al., 2017) allow correct estimation of the temperatures using high precision data obtained by LA ICP MA or even EPMA inn hjigh resolution…
View article: Peridotite xenoliths from the Udachnaya-East kimberlite: windows onto the evolution of the Siberian sub-cratonic lithospheric mantle
Peridotite xenoliths from the Udachnaya-East kimberlite: windows onto the evolution of the Siberian sub-cratonic lithospheric mantle Open
Peridotite xenoliths from kimberlites are useful tools for exploring the architecture and composition of the thick sub-cratonic lithosphere, and thus understanding the long-term evolution of the Earth’s mantle. However, the continuou…
View article: Ancient mantle metasomatism in West Ykukite field Northern Yakutia
Ancient mantle metasomatism in West Ykukite field Northern Yakutia Open
   In the subcratonic lithospheric mantle (SCLM) beneath Leningrad pipe (West Ukukit field), Yakutia garnet thermobarometry allows us to identify seven horizons (paleo subduction slab). Microprobe data for Cr-bearing amphibo…
View article: Mineralogical and geochemical characteristics of lamproite minerals of the Murunsky massif.
Mineralogical and geochemical characteristics of lamproite minerals of the Murunsky massif. Open
Minerals from leucite lamproites of the Murunsky alkaline massif (Vladykin, 2000; 2005; Vladykin, 2009) were analyzed by electron microscopy in the sections of 700 grains of minerals (IGM SB RAS) and LA ICP MS (IIC SB RAS) - 40 grains. Pyr…
View article: Peridotite xenoliths from the Udachnaya-East kimberlite: clues on the P-T structure and composition of the Siberian sub-cratonic lithospheric mantle
Peridotite xenoliths from the Udachnaya-East kimberlite: clues on the P-T structure and composition of the Siberian sub-cratonic lithospheric mantle Open
Together with diamonds, peridotite xenoliths are the best probes for unravelling the architecture and composition of the thick sub-cratonic lithosphere, as they reveal the physicochemical environment in which they were formed and equilibra…
View article: Unique Amphibole Bearing Mantle Column Beneath the Lenin-Grad Kimberlite Pipe, West Ukukit field, NE Yakutia.
Unique Amphibole Bearing Mantle Column Beneath the Lenin-Grad Kimberlite Pipe, West Ukukit field, NE Yakutia. Open
In the subcratonic lithospheric mantle (SCLM) beneath Leningrad pipe (West Ukukit field), Yakutia garnet thermobarometry allows us to identify seven horizons (paleo subduction slab). Microprobe data for Cr-bearing amphiboles >500 grains…
View article: Thermobarometry of diamond inclusions: Mantle structure and evolution beneath Archean cratons and mobile belts worldwide
Thermobarometry of diamond inclusions: Mantle structure and evolution beneath Archean cratons and mobile belts worldwide Open
Thermobarometric calculations for mineral inclusions in diamonds provide a systematic comparison of P-T-fO2 conditions for different cratons and mobile belts worldwide, using a database of 4440 mineral EPMA analyses. Beneath all cratons, t…