Serpentinized peridotite and associated listvenites of Neoproterozoic age outcrop in the Bir Umq area western Saudi Arabia. The mantle section ophiolite is extensively serpentinized. Serpentinite host samples are low Al2O3 (0.48–0.75 wt%) CaO (0.28–1.24 have high Mg# (0.90–0.92), indicating a strongly depleted protolith, typically with supra-subduction zone environments more specifically fore-a...

While it is known that serpentinized peridotite acts as a water reservoir in the mantle wedge of subduction zone, spatial distribution and quantity stored these reservoirs, well acoustic velocity olivine-antigorite aggregates, are not constrained. Here, we report propagation seismic waves through synthetic olivine–antigorite which used proxies for various lithologies, by varying amount antigori...

Article history: Received 8 July 2009 Received in revised form 6 November 2009 Accepted 8 January 2010 Available online 2 February 2010

Serpentinization, i.e. the hydrothermal alteration of ultramafic rocks, is an important and ubiquitous geologic process that occurs at slow- ultraslow-spreading mid-ocean ridges, magma-poor passive margins, subduction zones. While serpentinization over a wide temperature range involves diverse fluid compositions, few experimental studies systematically examined effects composition on kinetics o...