U-Pb monazite ages in amphibolite- to granulite-facies orthogneiss reflect hydrous mineral breakdown reactions: Sveconorwegian Province of SW Norway

Bingen, Bernard; Breemen, O. van

doi:10.1007/s004100050428

Cited by 167 publications

(77 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4b). It has already been described by Bingen and van Breemen (1998), Zhu andO'Nions (1999), Foster et al (2002) and Cocherie et al (2005). Monazite from migmatite, leucocratic granite and granite dykes from this study exhibits such a zoning.…”

Section: Discussionsupporting

confidence: 80%

Electron microprobe monazite geochronology of magmatic events: Examples from Variscan migmatites and granitoids, Massif Central, France

Mézème

Cocherie

Faure³

et al. 2006

Lithos

View full text Add to dashboard Cite

To cite this version:Eugène Abstract U-Th-Pb dating of monazite with the electron probe microanalyser (EPMA) is increasingly documented as a reliable geochronological method offering high spatial resolution. This method has been applied on monazite from the Cévennes migmatites and granitoids from the southeast of the French Massif Central. Measurements were performed on separated grains after systematic back-scattered electron (BSE) imaging. Monazites from migmatites record two main ages: (i) a protolith age of about 550-543 Ma obtained on inherited cores, and (ii) a migmatization event between 329 ± 5 and 323 ± 3 Ma recorded by monazite rims and all other monogenetic grains. Monazite from the peraluminous Rocles pluton yields a 318 ± 3 Ma age. Finally, three granite dykes are dated at 333 ± 6, 318 ± 5 and 311 ± 5 Ma; the older dyke is the most deformed of them and is interpreted as linked to the migmatization event; the two other dykes are geochronologically, petrologically and structurally coeval with the Rocles pluton. The data constrain the timing of crustal melting following Variscan thickening in the northern Cévennes area. Migmatization of Ordovician protoliths took place at 329-323 Ma and was shortly followed by intrusion of leucogranite at 318-311 Ma. The study shows that EPMA dating of monazite can be successfully used to resolve a close succession of regional melting events.

show abstract

Section: Discussionsupporting

confidence: 80%

Electron microprobe monazite geochronology of magmatic events: Examples from Variscan migmatites and granitoids, Massif Central, France

Mézème

Cocherie

Faure³

et al. 2006

Lithos

View full text Add to dashboard Cite

show abstract

“…Our Re-Os molybdenite age is in good agreement with this CHIME age for the same pluton, which was interpreted as recording cooling to about 700ºC (Suzuki and Adachi, 1998). This temperature is in agreement with high closure temperature estimates for U-Pb systematics in monazite (e.g., Romer and Rötzler, 2001;Bingen and van Breemen, 1998).…”

Section: Results and Interpretationsupporting

confidence: 76%

Re-Os age of molybdenite from the Busetsu two-mica granite, central Japan.

舜三

.シュタイン

亮吏

2002

Bull. Geol. Surv. Japan

View full text Add to dashboard Cite

show abstract

“…Monazite inheritance in high-grade metamorphic rocks is uncommon (Spear & Parrish 1996;Bingen & van Breemen 1998), but has been reported, and therefore is a factor that needs consideration (Braun et al 1998;Santosh et al 2003;Pyle et al 2005). However, ultimately factors including monazite grainsize, composition, rate of cooling, fluid/melt availability and bulk composition will determine the closure temperature of a particular sample and whether inherited components are preserved (Parrish 1990;Bingen & van Breemen 1998;Ayers et al 1999;Zhu & O'Nions 1999;Rubatto et al 2001;Cherniak et al 2004). In the context of this study, the lack of lead diffusion is exemplified by sample PS.…”

Section: Potentiality For Lead Diffusionmentioning

confidence: 99%

Timing of Proterozoic metamorphism in the southern Curnamona Province: implications for tectonic models and continental reconstructions ∗

Rutherford

Hand

Barovich

2007

Australian Journal of Earth Sciences

View full text Add to dashboard Cite

Chemical U -Th -Pb monazite ages from metasedimentary and meta-igneous units of the Willyama Supergroup have confirmed initial SHRIMP U -Pb metamorphic zircon ages constraining the onset of the earliest tectonometamorphic event (the Olarian Orogeny) at ca 1610 Ma in the southern Curnamona Province. An additional episode of high-grade metamorphism and heterogeneously distributed retrograde metamorphism and monazite recrystallisation occurred between ca 1570 and 1550 Ma. On the basis of monazite chemical U -Th -Pb ages from across the southern Curnamona Province, tectonometamorphic models based on ca 1690 Ma low-P, high-T metamorphism in the southern Curnamona Province are not supported. Furthermore, tectonic reconstructions that rely on the correlation of ca 1690 Ma deformation and metamorphism in the Broken Hill region with a similar aged event in the Mojave tarrane of southwestern Laurentia (AUSWUS) are not supported.

show abstract

U-Pb monazite ages in amphibolite- to granulite-facies orthogneiss reflect hydrous mineral breakdown reactions: Sveconorwegian Province of SW Norway

Cited by 167 publications

References 29 publications

Electron microprobe monazite geochronology of magmatic events: Examples from Variscan migmatites and granitoids, Massif Central, France

Electron microprobe monazite geochronology of magmatic events: Examples from Variscan migmatites and granitoids, Massif Central, France

Re-Os age of molybdenite from the Busetsu two-mica granite, central Japan.

Timing of Proterozoic metamorphism in the southern Curnamona Province: implications for tectonic models and continental reconstructions ∗

Contact Info

Product

Resources

About