The transition between blueschists and lawsonite-bearing eclogites based on observations from Corsican metabasalts
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Cited by (68)
Intra-slab COH fluid fluxes evidenced by fluid-mediated decarbonation of lawsonite eclogite-facies altered oceanic metabasalts
2018, LithosCitation Excerpt :A recent review of the available P-T estimates including a belt-scale thermometric dataset can be found in Vitale Brovarone et al. (2013) (see also Vitale Brovarone et al., 2014 for updates), and only the main metamorphic features of the lawsonite eclogite-facies terranes are reported in the following. Lawsonite eclogite-facies rocks in Alpine Corsica are well preserved and include assemblages indicating the transition from garnet blueschist to eclogite sensu stricto (omphacite-garnet-rich) (Caron and Péquignot, 1986; Miller et al., 2000; Healy et al., 2009; Ravna et al., 2010; Vitale Brovarone et al., 2011a, 2014). A large thermometric dataset based on Raman spectroscopy on the carbonaceous material (RSCM) in this unit points to the peak T ranging from ~460 °C in the northern part to ~540 °C in the southern part of the unit across the belt (Vitale Brovarone et al., 2013).
Oceanic- and continental-type metamorphic terranes: Occurrence and exhumation mechanisms
2014, Earth-Science ReviewsTiming of HP metamorphism in the Schistes Lustrés of Alpine Corsica: New Lu-Hf garnet and lawsonite ages
2013, LithosCitation Excerpt :In this study we provide new Lu–Hf geochronological data on garnet and lawsonite in order to constrain the HP stage in the Schistes Lustrés of Alpine Corsica. The Lu–Hf method was selected because it enables direct dating of peak HP minerals such as garnet (Duchene et al., 1997) and lawsonite (Mulcahy et al., 2009), which are safely referred in Corsica to the prograde/peak HP path (e.g. Caron and Péquignot, 1986; Lahondère, 1996; Ravna et al., 2010; Vitale Brovarone et al., 2011a). Closure temperatures of the Lu–Hf method (> 630 °C, Skora et al., 2008; > 800 °C, Schmidt et al., 2011; ca. 1000 °C, Shu et al., 2013) are clearly not exceeded by our samples (500–550 °C; Vitale Brovarone et al., 2011a,b, 2013).