Results 71 to 80 of about 2,456 (203)
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 +4 more
doaj +1 more source
Distinguishing xenotime and zircon in ores and estimating the xenotime content for on-site analysis
Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyEstimation of the content of the major minerals containing rare earth element (REE) (e.g., xenotime, monazite, and bastnäsite) to extract metal REEs is a critical task for efficient exploration of mines with REE reserves. X-ray-excited optical luminescence (XEOL) imaging is a promising method for estimating the REE-bearing mineral content on-site ...
openaire +2 more sources
Location, Location, Location: Monazite Behaviour During UHT Metamorphism and Melt Crystallization
Journal of Metamorphic Geology, Volume 44, Issue 2, Page 158-175, February 2026.ABSTRACT Monazite is a robust mineral for recording the suprasolidus evolution of migmatites and granulites. However, monazite commonly has diverse compositions and yields variable dates in a single sample; understanding the controls on monazite behaviour and composition during partial melting and melt crystallization are not always straightforward ...
Chris Yakymchuk +2 more
wiley +1 more source
P‐T‐t‐d Evolution of Low‐Grade Metamorphic Xenotime, Eastern Alps (Austria)
Terra Nova, Volume 38, Issue 1, Page 65-76, February 2026.ABSTRACT In situ LA‐ICP‐MS U‐Pb dating of xenotime was used to establish the age of low‐grade metamorphism in Permian metasediments of the Austroalpine Unit (Eastern Alps, Austria). Complexly zoned xenotime in chloritoid‐bearing metasedimentary samples possesses distinct MREE‐rich domains. In the eastern sample, this domain yielded a date of c. 135 Ma,
M. S. Hollinetz +4 more
wiley +1 more source
Mineral chemistry and petrology of monazite and xenotime along a prograde metapelitic sequence in the Ivrea-Verbano Zone [PDF]
, 2011 Diese Arbeit beschäftigt sich mit den Phosphatmineralen Monazit (CePO4) und Xenotim (YPO4), die beide ausgezeichnet für in-situ Geochronologie geeignet sind.
Cernok, Ana
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Geochemical characterisation of xenotime formation environments using U-Th
, 2017 Xenotime (YPO4) is a trace component in many metasedimentary and some igneous rocks, altered rocks and many hydrothermal ore assemblages, where it forms in response to a range of different processes from igneous crystallisation to low-temperature early ...
Neal McNaughton (23284660) +1 more
core +2 more sources
1 billion-year-old cell contents preserved in monazite and xenotime
Scientific Reports, 2019 Exceptional microfossil preservation, whereby sub-cellular details of an organism are conserved, remains extremely rare in the Precambrian rock record.
David Wacey +3 more
doaj +1 more source
Crystals, 2020 In recent times, rare earth orthophosphates ( L n PO 4 ) have shown great potential as efficient optical materials. They possess either m o n a z i t e or x e n o t i m e –type structures.
Suchinder K. Sharma +5 more
doaj +1 more source
Decomposition of Xenotime with Sulfuric Acid
The Journal of the Society of Chemical Industry, Japan, 1962 マライ産ゼノタイムを試料として用い,硫酸によって分解するときの最適条件を求めることを目的とし,微粉砕試料について硫酸量,硫酸濃,処理温度,処理時間などと希土類元素の抽出率との関係について検討した。小規模な実験において,微粉砕試料ではつきのような条件でほとんど完全に分解する。(1)試料:硫酸1:2.0,(2)硫酸濃度95%,(3)処理温度250℃,(4)処理時間30分。ゼノタイム試料についてはX線分析によっても検討した。
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Exsolution of thortveitite, yttrialite, and xenotime during low-temperature recrystallization of zircon from New Caledonia, and their significance for trace element incorporation in zircon [PDF]
, 2004 Recrystallized zircon grains in a phengite-epidote-chlorite schist from north-eastern New Caledonia contain as inclusions a mineral assemblage consisting of celadonite, kaolinite, quartz, Fe-oxy-hydroxide,smectite, chlorite, xenotime-(Y), thortveitite ...
Hermann, Joerg +3 more
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