Aqueous fluids with salinity similar to seawater in subduction channels: Fluid inclusions in jadeite-rich rocks from serpentinite mélange, Rio San Juan Complex, Dominican Republic

Abstract

Seawater-like saline fluid inclusions (FI) were observed in peridotite xenoliths from the mantle wedge beneath the Pinatubo volcano (5.1 wt% NaCl equiv., Kawamoto et al., 2013, PNAS) and the Ichinomegata volcano (3.7 % NaCl, Kumagai et al., 2014, Contrib Mineral Petrol). Saline FI are commonly found in high-pressure metamorphic rocks (Frezzotti and Ferrando, 2015, Am Mineral). Here we report preliminary salinity data of rare aqueous FI in jadeite-rich rocks from serpentinite mélanges of the Rio San Juan Complex (Schertl, et al., 2012, Eur J Mineral).