Results 41 to 50 of about 646 (177)

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

Hotspot magmatism and volcanic hazard at Cape Verde through the lens of shipborne surveying and dredging

Geology Today, Volume 42, Issue 4, Page 174-182, July/August 2026.
The Cape Verde archipelago is a long‐lived volcanic ocean island chain formed by a mantle plume in the Atlantic Ocean. The archipelago is characterized by ten subaerial islands with complex age relationships, abundant submarine volcanism and variable volcanic hazards.
Brian Oller, Hunter R. Edwards, Yash Srivastava, Abigail K. Barker, Alex Kovalick, Giovanni Lima, Cornelia Nilsson, Marine Paquet, Easton Satin‐Shaw, Isaias Teixeira, M. Jeff Buxton, Noah DesRosiers, Mason Schettig, James M.D. Day   +13 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
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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
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Progressively Fenitised Schist and Carbonatitic Clasts From a Metasomatic Aureole Beneath the Alkalic Dunedin Volcano, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley   +1 more source

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 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
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Tracing Deep Carbon Cycling by Zinc Isotopes in a Peralkaline‐Carbonatite Suite

Geochemistry, Geophysics, Geosystems
Sedimentary carbonates are known to be carried into the deep mantle by subducted slabs, and studies on mantle‐derived magmas have attempted to trace the recycled carbonate in their mantle source.
Bowen Wei, Zhaochong Zhang, Zhiguo Cheng, Qiuhong Xie, M. Santosh, Weiliang Kong, Bingxiang Liu, Marc K. Reichow, Yingjie Li   +8 more
doaj   +1 more source

Characterisation of Pelletal Lapilli in Explosive Melilitite–Carbonatite Eruptions: An Example from Mt. Vulture Volcano (Southern Italy)

Geosciences
Among the volcaniclastic products of melilitite–carbonatite eruptions, pelletal lapilli are often found, resulting in them being particularly useful for characterising the interface between the erupting magma and its volatile component. Pelletal lapilli,
Gabriele Carnevale, Vittorio Zanon
doaj   +1 more source

Portland clinker production with carbonatite waste and tire-derived fuel: crystallochemistry of minor and trace elements [PDF]

Cerâmica, 2014
This paper presents results on the composition of Portland clinkers produced with non-conventional raw-materials and fuels, focusing on the distribution of selected trace elements.
F. R. D. Andrade, M. Pecchio, J. M. C. Santos, Y. Kihara   +3 more
doaj