Effect of water activity on rates of serpentinization of olivine

Thumbnail Image
Lamadrid, Hector
Rimstidt, J. Donald
Schwarzenbach, Esther M.
Klein, Frieder
Ulrich, Sarah
Dolocan, Andrei
Bodnar, Robert J.
Alternative Title
Date Created
Related Materials
Replaced By
The hydrothermal alteration of mantle rocks (referred to as serpentinization) occurs in submarine environments extending from mid-ocean ridges to subduction zones. Serpentinization affects the physical and chemical properties of oceanic lithosphere, represents one of the major mechanisms driving mass exchange between the mantle and the Earth’s surface, and is central to current origin of life hypotheses as well as the search for microbial life on the icy moons of Jupiter and Saturn. In spite of increasing interest in the serpentinization process by researchers in diverse fields, the rates of serpentinization and the controlling factors are poorly understood. Here we use a novel in situ experimental method involving olivine micro-reactors and show that the rate of serpentinization is strongly controlled by the salinity (water activity) of the reacting fluid and demonstrate that the rate of serpentinization of olivine slows down as salinity increases and H2O activity decreases.
© The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 8 (2017): 16107, doi:10.1038/ncomms16107.
Embargo Date
Nature Communications 8 (2017): 16107
Cruise ID
Cruise DOI
Vessel Name
Except where otherwise noted, this item's license is described as Attribution 4.0 International