Results 71 to 80 of about 14,584 (265)

Structure of the Mantle Keel of the Wyoming Craton and Its Relationship to Intracratonic Deformation and Magmatism

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The Wyoming Craton is often cited as an example of decratonization, implying the removal of its lithospheric keel. However, numerous geophysical imaging studies indicate the presence of thick mantle lithosphere beneath much of the Wyoming Craton.
M. J. Bezada, Z. Zhu, H. Ford, J. S. Byrnes   +3 more
wiley   +1 more source

Oxygen–Carbon and Strontium Isotope Composition in Primary Carbonatites of the World: The Data Summary and Linear Trends

Руды и металлы
A statistical regression analysis was performed of a summary of borrowed literary iso- topic data on 176 carbonatite occurrences worldwide (a total of 1829 paired δ18О-δ13С values in primary carbonatites).
Bolonin A. V.
doaj   +1 more source

Slab melting as a barrier to deep carbon subduction [PDF]

, 2016
Interactions between crustal and mantle reservoirs dominate the surface inventory of volatile elements over geological time, moderating atmospheric composition and maintaining a lifesupporting planet1.
A Gale, A Rohrbach, AM Martin, Andrew R. Thomson, AR Thomson, B Debret, B Harte, C Gerbode, CE Manning, CE Manning, DA Zedgenizov, DM Kerrick, E Watson, EM Syracuse, ES Kiseeva, ES Kiseeva, F Schilling, G Bulanova, GM Yaxley, GP Brey, J Alt, J Hernlund, JAD Connolly, JF Molina, JJ Ague, K Litasov, K Litasov, K Nakamura, K Okamoto, K Zahnle, KA Kelley, L Coogan, L Coogan, MG Jackson, Michael J. Walter, MJ Walter, MJ Walter, MJ Walter, MJ Walter, NH Sleep, P McDade, R Dasgupta, R Dasgupta, R Dasgupta, R Kessel, RB Ickert, RC Newton, RC Newton, RC Newton, Richard A. Brooker, RW Luth, S Ghosh, S Keshav, S Poli, S Shilobreeva, Simon C. Kohn, SS Shcheka, T Hammouda, T Hammouda, T Stachel, V Stagno, V Stagno   +61 more
core   +3 more sources

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Geochemical and geophysical relationship of the potassium-rich fenite zone in surface and subsurface investigations of the giant Kuluncak (Malatya) Nb-U-REE-Zr-Li mineralization

Bulletin of the Mineral Research and Exploration
The Kuluncak (Malatya) district hosts one of the most significant Nb–U–REE–Zr–Li mineralizations in Türkiye, spatially associated with alkaline and carbonatite-related rocks.
Okan Pulat, Murat Kirtil, Mustafa Karakaş, Mustafa Küçük, Ahmet Mert Ulutaş, Murat Akgöz, Ali Tugcan Unluer, Mehmet Burak Omaç, Özkan Türkan, Hülya Ateş   +9 more
doaj   +1 more source

Khanneshin - the Afghan carbonatite volcano, discovered in the office

Известия высших учебных заведений: Геология и разведка, 2017
The pétrographie and mineralogical laboratory study of the rock samples and the analysis of the geological setting in the sites of their collection (South Afghanistan) allowed suggesting the presence of the carbonatite volcano there.
B. Ya. Vikhter
doaj   +1 more source

Electrical Conductivity of Amorphous and Molten CaCO3 at High Pressures and Its Implications for Mantle Conductivity Anomalies

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Impedance spectrometry experiments have been conducted on CaCO3 up to 15 GPa and 2,100 K to identify its state under high pressure. The melting temperature of CaCO3 was also determined by the falling of a Re sphere observed via X‐ray radiography. The phase transition from aragonite to the amorphous phase does not cause a leap in the Electrical
Bin Zhao, Takashi Yoshino, Qi Chen, Tony Yu, Dongzhou Zhang, Bin Chen, Yanbin Wang   +6 more
wiley   +1 more source

A New Concept for an Integrated Mapping of Rare‐Earth Elements using Laser–Induced Fluorescence and Reflectance Spectroscopy

Advanced Sensor Research, Volume 5, Issue 3, March 2026.
We introduce a new integrated line‐scan sensor system that combines hyperspectral and laser‐induced fluorescence imaging as a non‐invasive alternative characterization technique specifically suited for rare‐earth element (REE) mapping and identification. We investigate in detail the potential and limitations in comparison to state‐of‐the‐art approaches
Titus Abend, Margret Fuchs, Jan Beyer, Sandra Lorenz, Nadine Schüler, Kay Dornich, Johannes Heitmann, Richard Gloaguen   +7 more
wiley   +1 more source

U-pb dating of niobium minerals from pyrochlor group (ilmeno-vishnevogorsk carbonatitis-miaskite complex, of the southern urals)

Литосфера, 2018
U-Pb dating of the pyrochlore-group minerals from the Nb-rare metal ore deposits of ilmeny-vishnevogorsky carbonatite-miaskite complex of the Ural fold region was carried out.
Irina L. Nedosekova, Viktor A. Koroteev, Boris V. Belyatsky, Viktor V. Sharygin, Еlena N. Lepechinа, Sergei V. Pribavkin   +5 more
doaj   +1 more source

Primary carbonatite melt from deeply subducted oceanic crust [PDF]

, 2008
Partial melting in the Earth's mantle plays an important part in generating the geochemical and isotopic diversity observed in volcanic rocks at the surface.
A Kubo, A Zindler, A. R. Lennie, AW Hofmann, B Harte, B Harte, C. B. Smith, CE Manning, DA Ionov, E Hauri, F Kaminsky, FE Brenker, FE Brenker, G. Gudfinnsson, G. P. Bulanova, GP Bulanova, J. D. Blundy, JM Brenan, K Hirose, K Hirose, K Hirose, L. Gobbo, L. S. Armstrong, LN Kogarko, M Arima, M Coltorti, M. J. Walter, MJ Walter, MJ Walter, O. T. Lord, OG Safonov, PC Hayman, R Dasgupta, R Kessel, R Tappert, RE Harmer, S. Keshav, S. M. Clark, SE Haggerty, T Irifune, T Stachel, T Stachel, T Stachel, WF McDonough   +43 more
core   +2 more sources