21 Result(s)

Article

He–Ne–Ar–N₂–CO₂ Systematics of Fernando de Noronha Mantle Xenoliths: Confirmation of Mantle Plume Origin

The Fernando de Noronha archipelago (southwest Atlantic, 345 km from the coast of Brazil) is considered as the result of mantle plume activity. However, data on the isotopic composition of helium and neon, whi...

A. I. Buikin, J. Hopp, L. N. Kogarko, A. B. Verchovsky… in Geochemistry International (2022)

Article

N–Ar–He–CO₂ Systematics Combined with H₂O, Cl, K Abundances in MORB Glasses Demonstrate Interaction of Magmatic and Hydrothermal Systems: a Case for MAR at 16°07′–17°11′ N

Here we present data on nitrogen and argon isotopic compositions and He–Ar–N–C(CO₂) elemental ratios obtained during stepwise crushing of fresh basaltic glasses of the N-MORB family from Mid-Atlantic ridge rift v...

A. I. Buikin, S. A. Silantyev, A. B. Verchovsky in Geochemistry International (2022)

Article

The Sources and Evolution of Fluid Phases of Guli Massif Carbonatites (West Siberia): Summarizing of Noble Gases, N₂, CO₂, H₂O Stepwise Crushing Data

Here we present summarizing of isotopic compositions and element ratios of noble gases, nitrogen, carbon and hydrogen in carbonatites of different generations of the Guli massif (West Siberia, Russia) obtained...

A. I. Buikin, J. Hopp, A. B. Verchovsky, L. N. Kogarko, M. Trieloff in Petrology (2021)

Article

Ar and N Isotopic Composition and Elemental Ratios of Ar, N, He, and C in Fluid Inclusions in Ultramafic Rocks of the Guli Massif (Polar Siberia)

The first data on the isotopic composition and elemental ratios of nitrogen, carbon, and noble gases in samples from the early stages of the formation of the Guli Complex (Maimecha-Kotui igneous province, Pola...

A. I. Buikin, A. B. Verchovsky, A. M. Asavin, L. N. Kogarko in Geochemistry International (2020)

Article

Isotopic Composition of Noble Gases, Nitrogen, and Carbon in the Ozerki New L Chondrite

The isotopic composition of noble gases, nitrogen, and carbon in two samples of the Ozerki L chondrite, which differ in the degree of impact metamorphism, analyzed by the methods of stepwise oxidation and crus...

E. V. Korochantseva, A. B. Verchovsky, A. I. Buikin… in Geochemistry International (2020)

Article

Noble Gases, Nitrogen and Carbon Isotopic Compositions of the Ghubara Meteorite, Revealed by Stepwise Combustion and Crushing Methods

The Ghubara meteorite contains abundant trapped gases in voids of highly retentive phases that can be released by stepwise crushing and thermal degassing. Their composition is dominated by the solar wind compo...

E. V. Korochantseva, A. I. Buikin, A. B. Verchovsky… in Geochemistry International (2018)

Article

N–C–Ar–He Isotopic Systematics of Quenched Tholeiitic Glasses from the Bouvet Triple Junction Area

The paper presents pioneering data on the isotopic composition and elemental ratios of nitrogen, carbon (carbon dioxide), helium, and argon in the fluid phase of quenched tholeiitic glasses from different segm...

A. I. Buikin, A. B. Verchovsky, N. A. Migdisova in Geochemistry International (2018)

Article

Nitrogen Isotopic Composition of Shungite from the Onega Structure, Russia, and the Origin of the Organic Matter

The paper presents first nitrogen isotope analyses in shungites sampled from the core material of boreholes and from adits in the Onega region, Russia. The samples represent all varieties of the rocks, both st...

A. B. Verchovsky, N. A. Goltsin, E. M. Prasolov, K. I. Lokhov in Geochemistry International (2018)

Article

Sites and Origin of Noble Gases in Minerals: A Case Study of Amphibole from Alkaline Granitoids of the Kola Peninsula

The paper presents newly acquired data on the budget and mobility of isotopes of noble gases in samples of amphibole, a mineral commonly characterized by relatively high He concentrations compared to other roc...

M. A. Gannibal, I. N. Tolstikhin, A. B. Verchovsky… in Geochemistry International (2018)

Article

Origin of isotopically light nitrogen in meteorites

Bulk meteorite samples of various chemical classes and petrologic types (mainly carbonaceous chondrites) were systematically investigated by the stepped combustion method with the simultaneous isotopic analysi...

A. B. Verchovsky in Geochemistry International (2017)

Article

The fluid phase evolution during the formation of carbonatite of the Guli massif: Evidence from the isotope (C, N, Ar) data

The first data on variations of the isotope composition and element ratios of carbon, nitrogen, and argon in carbonatites of different generations and ultrabasic rocks of the Guli massif obtained by the method...

A. I. Buikin, A. B. Verchovsky, L. N. Kogarko, V. A. Grinenko… in Doklady Earth Sciences (2016)

Article

On the preservation of Xe of the isotopically normal component of noble gases in meteoritic nanodiamonds and ⁴He in lunar soil according to the data of gas desorption during stepped pyrolysis

The release kinetics of Xe of the isotopically normal component of noble gases (P3 component) from the coarse-grained fraction of nanodiamonds from the Orgueil (CI) meteorite and the kinetics of ⁴He release from ...

A. V. Fisenko, A. B. Verchovsky, L. F. Semjonova in Geochemistry International (2014)

Article

PVT parameters of fluid inclusions and the C, O, N, and Ar isotopic composition in a garnet lherzolite xenolith from the Oasis Jetty, East Antarctica

Orthopyroxene, clinopyroxene, and olivine from a metasomatized mantle xenolith of garnet lherzolite in alkaline rocks at the Jetty Oasis, East Antarctica, contain numerous carbon dioxide-dominated composite me...

A. I. Buikin, I. P. Solovova, A. B. Verchovsky, L. N. Kogarko… in Geochemistry International (2014)

Article

Composition and sources of volatiles and noble gases in fluid inclusions in pyroxenites and carbonatites of the Seblyavr Massif, Kola Peninsula

Carbonatites and related pyroxenites from the Seblyavr alkaline-ultramafic massif were analyzed for isotopic composition and concentrations of carbon (in carbon dioxide), nitrogen, and noble gases using the st...

A. I. Buikin, A. B. Verchovsky, N. V. Sorokhtina, L. N. Kogarko in Petrology (2014)

Article

Light element geochemistry of the Chelyabinsk meteorite

The spectacular arrival of a huge meteorite in central Siberia on February 15th 2013 was the largest event of its kind for more than a hundred years. Oxygen isotope analysis reveals the object involved was an ...

C. T. Pillinger, R. C. Greenwood, D. Johnson, J. M. Gibson… in Geochemistry International (2013)

Article

C, N, He, and Ar isotope and element ratios in fluid inclusions from MORB chilled glasses: Stepwise crushing data

A. I. Buikin, A. B. Verchovsky, V. A. Grinenko… in Geochemistry International (2013)

Article

Kinetics of C, N, and Xe release during the quasi-isothermal pyrolysis and subsequent oxidation of nanodiamond from the Orgueil CI meteorite

Analysis of the C, N, and Xe release kinetics of intermediate-sized nanodiamond fraction from the Orgueil CI meteorite during isothermal pyrolysis conducted for the first time and subsequent oxidation indicate...

A. V. Fisenko, A. B. Verchovsky, L. F. Semjonova in Geochemistry International (2013)

Article

Carbon, Nitrogen, and Noble Gases in the Diamond Fractions of the Novo Urei Ureilite

We measured the contents and isotopic compositions for C, N, and noble gases in the diamond fractions separated in a heavy liquid (ρ = 2.9 g/cm³) from a sample enriched with diamond from the Novo Urei ureilite. T...

A. V. Fisenko, A. B. Verchovsky, L. F. Semjonova, C. T. Pillinger in Solar System Research (2004)

Article

Heterogeneity of the interstellar diamond in the CV3 meteorite Efremovka

Based on the heterogeneity in the contents and isotopic compositions of carbon, nitrogen, and rare gases found in different (in grain size) interstellar diamond fractions of the meteorite Efremovka, we discuss...

A. V. Fisenko, A. B. Verchovsky, L. F. Semjonova, C. T. Pillinger in Astronomy Letters (2001)