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Three water sites in upper mantle olivine and the role of titanium in the water weakening mechanism

Walker, Andrew; Hermann, Joerg; Berry, Andrew John; O'Neill, Hugh


Infrared spectroscopy on synthetic olivines has established that there are at least four different mechanisms by which hydrogen is incorporated into the crystal structure. Two mechanisms occur in the system MgO-SiO2-H 2O associated with silicon and magnesium vacancies, respectively. A third mechanism is associated with trivalent cation substitution, commonly Fe3+ in natural olivine, while the fourth mechanism, which is the one most prevalent in natural olivines from the spinel-peridotite faciès...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Journal of Geophysical Research
DOI: 10.1029/2006JB004620


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