Results 81 to 90 of about 61,505 (248)

DISTRIBUTION OF TRACE ELEMENTS IN GROWTH ZONES AND SECTORS OF SPODUMENE CRYSTALS (PASHKI DEPOSIT, NURISTAN, AFGHANISTAN) [PDF]

Минералогия
Regular distribution of several trace elements in spodumene crystals of the Pashki pegmatite Li deposits in Afghanistan (Nuristan province) is analyzed using secondary ion mass spectrometry (SIMS).
M.A. Ivanov, N. Hamdard, S.G. Skublov, V.V. Smolensky   +3 more
doaj   +1 more source

Origin of carbonate-silicate rocks of the Porya Guba (the Lapland-Kolvitsa Granulite Belt) revealed by stable isotope analysis (δ18O, δ13C)

Записки Горного института
Carbonate-silicate rocks of unclear origin have been observed in granulites of the Porya Guba of the Lapland-Kolvitsa Belt within the Fennoscandinavian Shield.
Dmitrii P. Krylov, Ekaterina V. Klimova
doaj  

The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin

Геодинамика и тектонофизика, 2019
Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova ...
A. B. Kuzmichev, M. K. Danukalova, V. F. Proskurnin, A. A. Bagaeva, N. I. Beresyuk, P. A. Gromov   +5 more
doaj   +1 more source

Correlation of the supracrustal complexes of the Small and Large Keivy, North-East of the Baltic Shield

Vestnik MGTU
The issue of correlation between the Small and Large Keivy sections is considered using a technique that includes searching for trends in partially ordered sets of random variables and assessing the degree of similarity/difference between rock ...
Kozlov N. E., Sorokhtin N. O., Mudruk S. V.   +2 more
doaj   +1 more source

The carbon release triggered by 1.32 Ga sill emplacement and its potential environmental implications

Frontiers in Earth Science
Magmatic activity is one of the important pathways for the delivery of deep Earth carbon to the surface. The massive carbon release in this process can have significant impacts on atmospheric-oceanic environment.
Chaokun Zhang, Chaokun Zhang, Wei Tian, Wei Tian, Yanxin He, Yanxin He, Mingyue Gong, Shun Li   +7 more
doaj   +1 more source

The Earth's Greatest Porous Media

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract How deeply does modern meteoric water circulate into the continental crust? How deep is the Earth's Critical Zone (CZ), the top layer of the continental lithosphere that co‐evolves with the atmosphere, hydrosphere, and biosphere, extending from vegetation canopy down to fresh bedrock and the base of active groundwater circulation?
Ying Fan, William E. Dietrich, Jérôme Gaillardet, Steve E. Ingebritsen   +3 more
wiley   +1 more source

New approaches to lithological and stratigraphic research and mapping of the early Precambrian complexes (using an example of the Paleoproterozoic and Archean structures of Keivy, Kola Peninsula)

Vestnik MGTU
Previously, the team of authors proposed a new method for the comparative analysis of geological objects. Its foundation is an assessment of the proximity of statistically significant petrogeochemical characteristics.
Kozlov N. E., Mudruk S. V., Sorokhtin N. O.   +2 more
doaj   +1 more source

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source

Trace element composition of silicate minerals from Kunashak Meteorite (L6)

Записки Горного института
Major (EPMA) and trace (SIMS) element geochemistry in the silicate minerals (olivine, pyroxene and plagioclase) of Kunashak equilibrated ordinary chondrite (L6) is described. No variations in the major element concentrations of the silicate minerals have
Kristina G. Sukhanova, Olga L. Galankina
doaj  

Assessing Mobility Among Inferred Elites Interred in Crypts 1–3 on Kom H at Tungul (Old Dongola), Sudan

Archaeometry, Volume 68, Issue 3, Page 409-420, June 2026.
ABSTRACT As the capital of Makuria, Tungul was a major sociopolitical center within medieval Nubia, being the seat of a bishopric and a monastic community. During the excavation of the Kom H monastery, three burial crypts (Crypts 1–3) were uncovered.
Robert J. Stark, Artur Obłuski, Robert Mahler   +2 more
wiley   +1 more source