Constraints from the dehydration of antigorite on high-conductivity anomalies in subduction zones.

ABSTRACT: Regions with high electrical conductivities in subduction zones have attracted a great deal of attention. Determining the exact origin of these anomalies could provide critical information about the water storage and cycling processes during subduction. Antigorite is the most important hydrous mineral within deep subduction zones. The dehydration of antigorite is believed to cause high-conductivity anomalies. To date, the effects of dehydration on the electrical conductivity of antigorite remain poorly understood. Here, we report new measurements of the electrical conductivity of both natural and hot-pressed antigorite at pressures of 4 and 3 GPa, respectively, and at temperatures reaching 1073 K. We observed significantly enhanced conductivities when the antigorite was heated to temperatu

SUBMITTER: Wang D 

PROVIDER: S-EPMC5714963 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature