Jadeitite Jade and Related Rocks from the Sierra del Convento Subduction Mélange ( Eastern Cuba ) /

Jadeitite is formed in high-pressure subduction environments as a rare constituent within serpentinite-matrix tectonic mélanges. It is formed by fluid flow in veins over a wide range of pressure and temperature (P-T) conditions, from blueschist facies to eclogite facies (Harlow, 1994; Harlow and Sorensen, 2005; Sorensen et al., 2006; Harlow et al., 2008). Therefore, the study of jadeitites provides first hand insights into the chemical signature of released fluid and the role of slab dehydration, water-rock interactions and geochemical recycling in subduction zones, (Morishita et al., 2007; Sorensen et al., 2010).