Results 71 to 80 of about 4,120 (208)

Gravity and Magnetic Separation for Concentrating Critical Raw Materials from Granite Quarry Waste: A Case Study from Buddusò (Sardinia, Italy)

Resources
The Critical Raw Materials Act (CRMA), enacted by the European Union (EU) in May 2024, represents a strategic framework that aims to address the growing demand for critical raw materials (CRMs) and reduce dependency on non-EU sources.
Antonello Aquilano, Elena Marrocchino, Carmela Vaccaro   +2 more
doaj   +1 more source

Petrography of Allanite-bearing Tonalite from Iwo Region, Osun State, Nigeria

Materials and Geoenvironment, 2020
Primary, secondary and accessory minerals in tonalitic rocks from Iwo region of the Precambrian Basement Complex of Southwestern Nigeria were identified and analysed with the aim of determining the various processes involved during the crystallisation of
E. J. Oziegbe, O. O. Ocan, A. O. Buraimoh   +2 more
semanticscholar   +1 more source

Episodic Rifting of a Large Igneous Province Concentrated Along a Microcontinent Boundary

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Many large igneous provinces (LIPs) comprise once contiguous magmatic products that are now fragmented across multiple tectonic plates. Emplacement of these voluminous magmatic products is commonly coeval with, or shortly followed by, fragmentation into constituent domains.
Jeremy L. Asimus, Hugo K. H. Olierook, Sally A. Gibson, Joanne M. Whittaker, Jacqueline A. Halpin, Nathan R. Daczko, Millard F. Coffin, Daniel E. Heaton, Anthony A. P. Koppers, Kaj Hoernle, Folkmar Hauff, Ivan Belousov   +11 more
wiley   +1 more source

Redistribution of REE, Y, Th, and U at high pressure: Allanite-forming reactions in impure meta-quartzites (Sesia Zone, Western Italian Alps)

, 2012
International audienceAccessory phases are important hosts of trace elements; allanite may contain >90% of the REE in a bulk rock. The mobility and redistribution of several trace elements, notably HREE, Th, U, and Y is thus controlled by reactions ...
Cenki-Tok, B., Darling, James, Regis, Daniele, Regis, D., Cenki-Tok, Bénédicte, Engi, Martin, Darling, J., Engi, M.   +7 more
core   +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

Allanite Petrochronology in Fresh and Retrogressed Garnet–Biotite Metapelites from the Longmen Shan (Eastern Tibet)

, 2019
Linking the timing of allanite growth to metamorphic conditions in metapelites is particularly challenging because of the large variety of allanite textures and chemical compositions.
Janots, Emilie, Magnin, Valérie, Airaghi, Laura, Lanari, Pierre, de Sigoyer, Julia   +4 more
core   +1 more source

Experimental constraints on the relative stabilities of the two systems monazite-(Ce) – allanite-(Ce) – fluorapatite and xenotime-(Y) – (Y,HREE)-rich epidote – (Y,HREE)-rich fluorapatite, in high Ca and Na-Ca environments under P-T conditions of 200–1000 MPa and 450–750 °C

Mineralogy and Petrology, 2017
The relative stabilities of phases within the two systems monazite-(Ce) – fluorapatite – allanite-(Ce) and xenotime-(Y) – (Y,HREE)-rich fluorapatite – (Y,HREE)-rich epidote have been tested experimentally as a function of pressure and temperature in ...
B. Budzyń, D. Harlov, G. Kozub-Budzyń, J. Majka   +3 more
semanticscholar   +1 more source

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, Volume 61, Issue 3, Page 566-592, March 2026.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source

Rare-earth and rare-metal mineralization in late granite of Syrostan massif (Southern Urals)

Литосфера, 2015
The article provides a complete list of Syrostan massif minerals, which includes 47 mineral species. It is shown that the rare-metal and rare-earth mineralization is confined to the late vein facies - granite dykes and pegmatites.
E. P. Makagonov, V. A. Muftahov
doaj   +2 more sources

Rapid Slab Rollback Drives Early Cretaceous Back‐Arc Extension in NE China: Implication for Crustal Growth and Episodic Porphyry Mineralization

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract The subduction of the Paleo‐Pacific Plate beneath the NE Asian continental margin induced extensive magmatism, providing an excellent opportunity to investigate the interplay between plate dynamics, arc magmatism, continental crust formation, and porphyry mineralization.
Honghui Wang, Xinghua Ma, Simon A. Wilde, Yong Lai, Zhenhua Zhou, Jinyu Yan   +5 more
wiley   +1 more source