Results 21 to 30 of about 1,390 (185)

Separation, reserve estimation and radioactivity responsibility of the economic heavy minerals of East El- Arish black sand, North Sinai, Egypt

open access: yesScientific Reports, 2023
Multi-heavy mineral separation techniques like density, magnetic, and electromagnetic techniques are followed by picking, grain counting, and mineralogical examinations conducted with an environmental scanning electron microscope (ESEM). These techniques
M. Awad   +5 more
doaj   +1 more source

REE-bearing minerals in Drava river sediments, Slovenia, and their potential origin

open access: yesGeologija, 2017
Monazite and xenotime are major ore minerals for rare earth elements (REE), Y, and actinides, a powerful tool for radiometric dating and indicators of the geological genesis of the parent rock.
Aleš Šoster   +3 more
doaj   +1 more source

Radiological assessment of different monazite grades after mechanical separation from black sand

open access: yesScientific Reports, 2023
In Egyptian black sands, monazite is a precious mineral characterized by its composition, which includes crucial constituents such as thorium, trace amounts of uranium, and rare earth elements. It is essential to evaluate and quantify the extent of gamma-
N. A. kotb   +2 more
doaj   +1 more source

Phase Decomposition upon Alteration of Radiation-Damaged Monazite–(Ce) from Moss, Østfold, Norway

open access: yesCHIMIA, 2010
The internal textures of crystals of moderately radiation-damaged monazite–(Ce) from Moss, Norway, indicate heavy, secondary chemical alteration.
Lutz Nasdala   +8 more
doaj   +1 more source

New monazite U-Pb age constraints on the evolution of the Paleoproterozoic Vaasa granitoid batholith, western Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2016
The Vaasa batholith, western Finland, is a large, peraluminous granitoid pluton that crystallized at 1.88–1.87 Ga during the culmination of the Svecofennian orogeny.
A.K. Kotilainen   +4 more
doaj   +1 more source

MINERALOGY AND GEOCHEMISTRY OF CHLORITHOLITES FROM THE NEPRYAKHINO GOLD FIELD, SOUTH URALS [PDF]

open access: yesМинералогия, 2020
The chlorite rocks (chloritolites) exposed in a bedrock of the Mokhovoe boloto (Moss swamp) gold placer (East Uralian Megazone, South Urals), which occurs on ultramafic rocks, are studied.
V.V. Murzin, D.A. Varlamov
doaj   +1 more source

Formation of monazite-(Ce, La) by fluid-apatite interaction: the Floresta Azul Alkaline Complex, Bahia, Brazil

open access: yesBrazilian Journal of Geology
: Monazite is a common accessory mineral in the Floresta Azul Alkaline Complex, occurring in three different rock types, which form this batholith: nepheline syenite, granite and fenite. Two compositional types of monazite can be found: monazite-(Ce) and
Jailson Júnior Alves Santos   +3 more
doaj   +1 more source

Ion microprobe dating of fissure monazite in the Western Alps: insights from the Argentera Massif and the Piemontais and Briançonnais Zones

open access: yesSwiss Journal of Geosciences, 2020
Ion probe 208Pb/232Th fissure monazite ages from the Argentera External Massif and from the high-pressure units of the Western Alps provide new insights on its Cenozoic tectonic evolution.
Emmanuelle Ricchi   +4 more
doaj   +1 more source

Mineralogy, Geochemistry, and Fluid Inclusion Microthermometry of Apatite and Rare Earth Element Minerals in the Esfordi Deposit, NE of Bafq, Yazd Province

open access: yesJournal of Economic Geology, 2021
Introduction REE should be evaluated in rocks and minerals due to their behavior in complex geochemical processes leading to their use as tracers in geochemical environments.
Kiamars Hosseini   +1 more
doaj   +1 more source

Assessment of Five Monazite Reference Materials for U-Th/Pb Dating Using Laser-Ablation ICP-MS

open access: yesGeosciences, 2019
Monazite is a common accessory phosphate mineral that occurs under a wide range of pressure and temperature conditions in sedimentary, metamorphic and igneous rocks.
Marianne Richter   +6 more
doaj   +1 more source

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