Results 41 to 50 of about 2,658 (209)

Diamonds from Dachine, French Guiana : a unique record of Early Proterozoic subduction [PDF]

, 2016
This research was supported by NERC grant NE/J008583/1 to MJW and SCK.Diamonds from Dachine, French Guiana, are unique among worldwide diamond populations.
Bulanova, Galina P., Burnham, Antony D., Gobbo, Luiz, Kohn, Simon C., Mikhail, Sami, Smith, Chris B., Walter, Michael J.   +6 more
core   +2 more sources

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

OXIDES AND SILICATES OF RARE AND RARE-EARTH ELEMENTS IN ALKALINE ROCKS OF THE ILMENOGORSKY BLOCK (SOUTHERN URALS) [PDF]

Минералогия, 2017
A significant part of the REE and rare elements in the rocks of the Ilmenogorsky block forms its own minerals. Oxides and silicates of rare and rare-earth elements in alkaline rocks of Ilmenogorsky block (Southern Urals) include oxynatropyrochlore ...
E.P. Makagonov, V.A. Kotlyarov, V.A. Muftakhov   +2 more
doaj  

REE-bearing minerals in the Rapakavi Grante, Southern Finland

Open Geosciences, 2015
The studied rock samples belong to the classic1615–1645 Ma Wiborg Rapakivi granite terrane of southeasternFinland. Geochemical studies show that the rapakivigranites and associated rocks form metaluminousto peraluminous A-type granites and plot in the ...
Al-Ani Thair
doaj   +1 more source

Stability and isotopic dating of monazite and allanite in partially molten rocks: examples from the Central Alps [PDF]

, 2018
We investigated the stability of monazite and allanite as a function of bulk rock composition within several types of Tertiary Alpine anatexites, characterized by different compositions and melting reactions, but similar P-T conditions of melting.
Berger, Alfons, Rosenberg, Claudio, Schaltegger, Urs   +2 more
core  

U-Th-rich zircon, thorite and allanite-(Ce) as main carriers of radioactivity in the highly radioactive ultrapotassic melasyenite porphyry from the Šumava Mts., Moldanubian Zone, Czech Republic [PDF]

Journal of GEOsciences, 2012
*Corresponding author A melasyenite porphyry from the vicinity of Kasperske Hory (the Sumava Mts., Moldanubian Zone) shows a high natural radioactivity (K = 4.4–6.1 wt. %, eU = 15–24 ppm, eTh = 38–49 ppm). The most important carriers of U and Th are zircon, thorite, allanite-(Ce) and scarce monazite. Most of the zircon and thorite grains are altered by
V. Žáček, R. Škoda, P. Sulovský
openaire   +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

Titanite composition and SHRIMP U–Pb dating as indicators of post-magmatic tectono-thermal activity: Variscan I-type tonalites to granodiorites, the Western Carpathians

Geologica Carpathica, 2019
Titanite belongs to the common accessory minerals in Variscan (~360–350 Ma) metaluminous to slightly peraluminous tonalites to granodiorites of I-type affinity in the Tatric and Veporic Units, the Western Carpathians, Slovakia.
Uher Pavel, Broska Igor, Krzemińska Ewa, Ondrejka Martin, Mikuš Tomáš, Vaculovič Tomáš   +5 more
doaj   +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 [PDF]

Mineralogy and Petrology, 2016
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 systems roughly replicating granitic to pelitic composition with high and moderate bulk CaO/Na2O ratios ...
Budzyń, B., Harlov, D., Kozub-Budzyń, G., Majka, J.   +3 more
openaire   +4 more sources

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