Results 11 to 20 of about 22,327 (143)

AGE AND GEODYNAMIC SETTINGS OF MIASKITE-PEGMATITES, CARBONATITES, AND Nb-Zr MINERALIZATION OF THE ILMENO-VISHNEVOGORSKY ALKALINE COMPLEX, SOUTH URAL (U-Pb AND Rb-Sr ISOTOPE DATA)

Геодинамика и тектонофизика, 2022
The Ilmeno-Vishnevogorsky miaskite-phenite-carbonatite complex (IVС), located in the Urals folded region, is a representative of "linear type" carbonatite complexes, with which Nb-Zr deposits are associated.
I. L. Nedosekova, V. S. Chervyakovsky, M. V. Chervyakovskaya, V. A. Bulatov   +3 more
doaj   +1 more source

GEOCHEMISTRY OF TRACE ELEMENTS IN ROCK-FORMING MINERALS OF GNEISSES AND GRANITES OF THE MURZINKA GRANITE AREA, CENTRAL URALS [PDF]

Минералогия, 2020
The Murzinka granite area (Central Urals), which combines Murzinka granite pluton and underlying rocks of the Murzinka-Adui metamorphic complex, exhibits an evident WE-trending geochemical zonation of magmatism with increasing of Rb, Li, Nb and Ta ...
S.V. Pribavkin, N.S. Borodina, M.V. Chervyakovskaya   +2 more
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Spatial and temporal variations of Rb/Sr ratios of the bulk surface sediments in Lake Qinghai

Geochemical Transactions, 2010
The Rb/Sr ratios of lake sediments have been suggested as indicators of weathering intensity by increasing work. However, the geochemistry of Rb/Sr ratios of lake sediments is variable between different lakes.
Liu Bin, Xu Hai, Wu Feng
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On the age of pyrochlore carbonatites from the Ilmeno-Vishnevogorsky Alkaline Complex, the Southern Urals (insights from Rb-Sr and Sm-Nd isotopic data)

Литосфера, 2020
Research subject. In this research, we carried out Sm-Nd- и Rb-Sr-dating of pyrochlore carbonatite from the Vishnevogorsky niobium deposit, Ilmeno-Vishnevogorsky Alkaline Complex, Southern Urals.
I. L. Nedosekova, V. A. Koroteev, T. B. Bayanova, P. A. Serov, V. I. Popova, M. V. Chervyakovskaya   +5 more
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Response of the Rb–Sr system in biotite during contact metamorphism in the aureole of the Makhavinekh Lake Pluton, Labrador [PDF]

Geochronology
High-temperature contact metamorphism in the aureole of the 1322 Ma Makhavinekh Lake Pluton, Labrador, led to progressive consumption of 1850 Ma garnet formed during upper-amphibolite facies regional metamorphism that produced migmatitic paragneiss ...
C. R. M. McFarlane
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Factors conditioning the content of chemical elements in soil and mosses in Armenia

Journal of Trace Elements and Minerals, 2022
In this research, chemical element contents were determined using the Epithermal neutron activation analysis (Cr, V, Ti, Sr, Rb, As, Zn, Co, Fe, Mn and Ba) and atomic-absorption spectrometry (Cu and Pb) for mosses and X-ray fluorescence spectroscopy (Cr,
Gevorg Tepanosyan, Lilit Sahakyan, Astghik Gevorgyan, Marina Frontasyeva   +3 more
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Direct Rubidium-Strontium Dating of Hydrocarbon Charge Using Small Authigenic Illitic Clay Aliquots from the Silurian Bituminous Sandstone in the Tarim Basin, NW China

Scientific Reports, 2019
Illitic clay is ubiquitous in clastic hydrocarbon reservoirs, and the host for several radiometric isotopes such as the potassium-argon (K-Ar) and rubidium-strontium (Rb-Sr) systems.
Shaojie Li, Xuan-Ce Wang, Chao-Feng Li, Simon A. Wilde, Youyu Zhang, Suzanne D. Golding, Keyu Liu, Yuxiang Zhang   +7 more
doaj   +1 more source

Dating circulations of hydrothermal fluids in the crystalline basements of unconformity-related metal deposits using in situ Rb ∕ Sr geochronology: proof of concept [PDF]

Geochronology
The use of in situ Rb–Sr geochronology has boomed in recent years following its implementation using LA-ICP-MS/MS technology, which enables fast, in situ analyses at the micron scale on selected minerals.
Q. Boulogne, Q. Boulogne, G. Milesi, G. Milesi, C. Peiffert, E. Fischer, E. Fischer, C. Ballouard, M. Serdoun, M. Serdoun, T. Obin, T. Obin, A. Lecomte, P. Martz, A. Kaczowka, J. Mercadier, J. Mercadier   +16 more
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Ultrasonic Shaking of Glauconite Pellets with Diverse Reagents for a Comparison of Their K–Ar with Already Published Rb–Sr Results

Geosciences, 2021
A combined ultrasonic treatment, with de-ionized H2O, dilute HAc or dilute HCl, of three Mid-Miocene glauconite samples was applied to K–Ar date the different separates in order to compare the results with those obtained by the Rb–Sr method using the ...
Norbert Clauer, Edward Keppens, I. Tonguç Uysal, Amélie Aubert   +3 more
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Rb–Sr muscovite age of a pegmatite near Sivakkavaara, Finland [PDF]

Bulletin of the Geological Society of Finland, 1977
Isotopic analysis of five large books of muscovite from a pegmatite emplaced between the third and fourth deformational phases of the Svecokarelian orogenic episode indicate crystallization before 1880 m.y.
O. van Breemen, D.R. Bowes
doaj   +1 more source