Results 51 to 60 of about 2,325 (156)

Provenance and Petrological Evolution of Sand Injection Complexes: Insights From Heavy Mineral Analysis in the Paleogene Forearc Succession of the San Joaquin Basin

Basin Research, Volume 38, Issue 3, May–June 2026.
The study of heavy mineral assemblages with statistical analysis resolves provenance signatures and quantifies syn‐emplacement modification of sand injection complexes. Results demonstrate transformative petrological processes, including density‐dependent hydraulic sorting and mechanical grain degradation.
Gustavo Zvirtes, Andrew Morton, Andrew Hurst, Ruy Paulo Philipp, Wiktor Luzinski, Giuseppe Palladino, Luciano Alessandretti   +6 more
wiley   +1 more source

An in-situ electron microscopy study of dual ion-beam irradiated xenotime-type ErPO$_4$

, 2020
International audienceRare-earth phosphates adopting the xenotime (REPO 4 ; RE = Tb − Lu & Y, Sc) structure are proposed as a potential matrix for the confinement of minor actinides.
Dacheux, Nicolas, Baumier, Cedric, Deschanels, Xavier, Mesbah, Adel, Seydoux-Guillaume, Anne-Magali, Rafiuddin, Mohamed Ruwaid, Szenknect, Stephanie   +6 more
core   +1 more source

Investigation of Thermoluminescence Characteristics and Kinetics of Natural Obsidian

Luminescence, Volume 41, Issue 4, April 2026.
Thermoluminescence (TL) properties of natural obsidian from the Aksaray region were investigated under beta irradiation. The study identifies optimal grain size, evaluates kinetic parameters via Tm–Tstop and computerized glow curve deconvolution (CGCD) methods, and demonstrates the material's potential for low‐dose environmental and personal radiation ...
Hamide Avci
wiley   +1 more source

Mineral chemistry of monazite-(Nd), xenotime-(Y), apatite, fluorite and zircon hosting in lamprophyre dyke in Abu Rusheid area, South Eastern Desert, Egypt

Geologija, 2012
The studied mineralized lamprophyre dyke in Abu Rusheid area is trending NNW-SSE, and occurs withinAbu Rusheid mineralized shear zone, measuring 0.2 - 1.0 m in width and 0.5 - 1.0 km in length. It was emplacedparallel with the Abu Rusheid shear zone. The
Mohamed A. Ali
doaj  

The Quantification of Radiation Damage in Orthophosphates Using Confocal μ-Luminescence Spectroscopy of Nd3+

Frontiers in Chemistry, 2019
In this study, we present a new concept based on the steady-state, laser-induced photoluminescence of Nd3+, which aims at a direct determination of the amorphous fraction fa in monazite- and xenotime-type orthophosphates on a micrometer scale ...
Christoph Lenz, Christoph Lenz, Gordon Thorogood, Robert Aughterson, Mihail Ionescu, Daniel J. Gregg, Joel Davis, Gregory R. Lumpkin   +7 more
doaj   +1 more source

Structure of a Variscan migmatite-granite transition zone (N Sardinia, Italy)

Journal of Maps, 2023
This paper presents the structural map of the Barrabisa Complex, an E-W ribbon-like migmatitic massif exposed in the northern part of Sardinia. The migmatites consist of metatexites and diatexites with variable melt proportion, grading in the central ...
M. De Luca, N. Ruberti, G. Oggiano, Ph. Rossi, V. Pascucci, L. Casini   +5 more
doaj   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Xenotime at the Nanoscale:U-Pb Geochronology and Optimisation of Analyses by Atom Probe Tomography

, 2021
Xenotime (YPO4) is an accessory phase common in low to high-temperature geological environments. Xenotime is an established geochronometer, though its small size, low modal abundance and textural complexity make it more difficult to analyse with ...
Saxey, David W., Reddy, Steven, Rickard, William, William D. A. Rickard, Fougerouse, Denis, Verberne, Rick, Reddy, Steven M., Saxey, David, Rickard, William D. A., Denis Fougerouse, Verberne, R., Joseph, Cilva, Steven M. Reddy, Rick Verberne, Cilva Joseph, David W. Saxey, Joseph, C.   +16 more
core   +2 more sources

Release, Migration, Sorption, and (Re)Precipitation of U during Peraluminous Granite Alteration under Oxidizing Conditions in Central Portugal

Geosciences, 2018
In this work, in order to study the release, migration, sorption, and (re)precipitation of uranium (U) during alteration under oxidizing conditions, we carried out a systematic study using scanning electron microscopy, X-ray maps, and electron microprobe
Marina M. S. Cabral Pinto, Maria M. V. G. Silva, Ana M. R. Neiva, Fernanda Guimarães, Paulo B. Silva   +4 more
doaj   +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