2015
DOI: 10.1007/s00015-015-0178-z
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Age of cleft monazites in the eastern Tauern Window: constraints on crystallization conditions of hydrothermal monazite

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Cited by 20 publications
(29 citation statements)
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“…Thorium concentrations (Table ) of the analyzed monazite crystals are similar to other dated Alpine cleft monazites [ Gasquet et al ., ; Janots et al ., ; Berger et al ., ; Gnos et al ., ]. Uranium concentrations are very low, as seems to be characteristic for hydrothermal cleft monazite [e.g., Catlos , ; Janots et al ., ], with the lowest values reported for highly oxidizing conditions [ Gnos et al ., ]. The high Th/U ratios of 360–995 of monazite PK2 (horizontal cleft), along with hematite and senaite in the cleft, therefore reflect the highly oxidizing conditions in this cleft.…”
Section: Discussionmentioning
confidence: 99%
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“…Thorium concentrations (Table ) of the analyzed monazite crystals are similar to other dated Alpine cleft monazites [ Gasquet et al ., ; Janots et al ., ; Berger et al ., ; Gnos et al ., ]. Uranium concentrations are very low, as seems to be characteristic for hydrothermal cleft monazite [e.g., Catlos , ; Janots et al ., ], with the lowest values reported for highly oxidizing conditions [ Gnos et al ., ]. The high Th/U ratios of 360–995 of monazite PK2 (horizontal cleft), along with hematite and senaite in the cleft, therefore reflect the highly oxidizing conditions in this cleft.…”
Section: Discussionmentioning
confidence: 99%
“…The high Th/U ratios of 360–995 of monazite PK2 (horizontal cleft), along with hematite and senaite in the cleft, therefore reflect the highly oxidizing conditions in this cleft. Under these conditions, U occurs partially as U 6+ and therefore cannot be accommodated in the monazite structure [ Janots et al ., ; Gnos et al ., ]. Lower Th/U ratios for GRIM4 (vertical cleft) of 80–425 and GRIM3 (vertical cleft) of 19–114 reflect less oxidizing conditions than in the horizontal PK2 cleft, as also reflected in the association of monazite with Fe 2+ ‐bearing ilmenite instead of hematite (Table S1).…”
Section: Discussionmentioning
confidence: 99%
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“…Fissure‐vein monazite grows in fluid‐filled pockets with fluid‐enhanced reaction kinetics at temperatures at or below ~350°C (Bergemann et al., ; Gnos et al., ; Grand'Homme, ). It has been shown that strong tectonic movement disturbs the chemical equilibrium in the fluid‐filled pocket without deforming the crystals.…”
Section: Introductionmentioning
confidence: 99%