Results 61 to 70 of about 2,496,797 (168)

Fast and Spatially Heterogeneous Cooling Rates at Amphibolite‐Facies Conditions in the Lepontine Alps (Switzerland)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The Lepontine dome (European Central Alps) is constituted by basement nappes under Alpine regional Barrovian metamorphism, yet the duration and pattern of its post‐peak amphibolite‐facies cooling remain uncertain. We examine garnet‐rim compositional re‐adjustment and employ inverse multicomponent diffusion modeling to estimate apparent cooling
A. Tagliaferri, E. Moulas, S. M. Schmalholz, F. L. Schenker   +3 more
wiley   +1 more source

Allanite-(Ce) and rare earth element bearing epidotes in the albitites of central Sardinia (Italy)|Allanite-(Ce) ed epidoti a Terre Rare nelle albititi della Sardegna centrale (Italia)

, 1996
Recent investigations have pointed out that epidotes and allanite-(Ce) are the main REE-bearing minerals in the albitites located in the granodiorite facies of Central Sardinia.
Tamanini M, Carcangiu G, Palomba M
core  

Unusual LREE-rich, peraluminous, monazite- or allanite-bearing pegmatitic granite in the central Grenville Province, Québec

, 2017
International audienceThis contribution presents an original study combining detailed mapping, petrography, whole-rock geochemistry and geochronological constraints on the recently identified LREE (Light Rare Earth Elements) occurrences associated with ...
Gervais, Félix, Groulier, Pierre-Arthur, Olivier Vanderhaeghe, Solgadi, Fabien, François Turlin, Abdelali Moukhsil, Marc Poujol, Félix Gervais, Turlin, François, Vanderhaeghe, Olivier, Fabien Solgadi, André-Mayer, Anne-Sylvie, Moukhsil, Abdelali, Pierre-Arthur Groulier, Poujol, Marc, Anne-Sylvie André-Mayer   +15 more
core   +1 more source

Apatite-hosted REE mineralization in the Eastern Ghats Mobile Belt: A future prospect for REE

Geosystems and Geoenvironment
The growing need of rare earth elements in different sectors of the modern-day world has led to their increasing demand, which is in accordance with their limited supply.
Mousumi Bhattacharjee, Kallola Kumar Behera, Smaranika Priyadarsini Swain   +2 more
doaj   +1 more source

Tonian shoshonitic to ultrapotassic granitoids from Chhotanagpur Gneissic Complex, Eastern Indian Shield: Age, origin and tectonic implications

Geosystems and Geoenvironment
This work reports petrogenesis of an ultrapotassic granitoid pluton emplaced in the Tonian (949.4 ± 2.3 Ma; new LA-ICPMS zircon U–Pb dating) along a regional shear zone during the post-collisional stage of the Grenvillian Satpura orogeny in Eastern India.
Ankita Basak, Bapi Goswami, Yoann Gréau, Susmita Das, Chittaranjan Bhattacharyya   +4 more
doaj   +1 more source

Non-matrix-matched standardisation in LA-ICP-MS analysis: general approach, and application to allanite Th–U–Pb dating [PDF]

, 2017
To make use of the full geochronological potential of accessory minerals such as zircon, allanite, monazite, and titanite, high spatial resolution isotopic analysis of the Th–U–Pb system is required.
Pettke, Thomas, Marco Burn, Thomas Pettke, Martin Engi, Pierre Lanari, Lanari, Pierre, Engi, Martin, Burn, Marco   +7 more
core   +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

Why allanite may swindle about its true age

, 2003
Allanite from the Tertiary Rieserferner pluton (Austrian Alps) is texturally and chemically heterogeneous. Continuous covariation trends reflect coupled substitution of Ca+Al vs.
Siegesmund, Siegfried, Romer, Rolf L.
core   +1 more source

Rare earth element evolution and migration in plagiogranites: a record preserved in epidote and allanite of the Troodos ophiolite

, 2015
Plagiogranites from the Troodos ophiolite in Cyprus are occasionally epidotised, either partially or completely. Epidotisation phenomena include replacement of pre-existing minerals and filling of miarolitic cavities.
Bach, Wolfgang, Anenburg, Michael, Jöns, Niels, Katzir, Yaron, Rhede, Dieter   +4 more
core   +1 more source

Chemical properties of allanite from the Ryoke and Hirosima granite pegmatites in Shikoku, Japan

, 2001
Allanite is one of the most common REE minerals in the Ryoke and Hiroshima granite pegmatites. It generally occurs as prismatic crystal up to 20cm in length to tabular masses in the contact zone of ferro-biotite and feldspar.
船越, 議生, 森岡, 北水, 皆川, 鉄雄   +2 more
core