TY - JOUR
T1 - Electrical conductivity of brine-bearing quartzite at 1 GPa
T2 - Implications for fluid content and salinity of the crust
AU - Shimojuku, Akira
AU - Yoshino, Takashi
AU - Yamazaki, Daisuke
N1 - Funding Information:
We thank E. Ito for valuable discussions regarding the manuscript. We also thank the two anonymous reviewers for their constructive comments that have helped us improve the manuscript significantly. This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas (Research in a Proposed Research Area), ‘Geofluids: Nature and Dynamics of Fluids in Subduction Zones’ from the Japan Society for Promotion of Science (No. 2109003). AS is supported by the JSPS Research Fellowships for Young Scientists.
PY - 2014/12
Y1 - 2014/12
N2 - The electrical conductivity of brine-bearing quartzite with fluid fractions of 0.19 to 0.30 and salinity of 3 to 17 wt.% was measured at 800 to 1,100 K and 1 GPa. The conductivity of the brine-bearing quartzite increases with salinity and fluid fraction, but is almost independent of temperature. Our results suggest that regions of high conductivity (10-3 to 10-2 S/m) in the crust could be explained by the presence of quartzite with fluids of salinity similar to that of seawater. To account for those regions with the highest conductivity of 10-1 S/m, quartzite with fluid of high salinity (>10 wt.%) is required.
AB - The electrical conductivity of brine-bearing quartzite with fluid fractions of 0.19 to 0.30 and salinity of 3 to 17 wt.% was measured at 800 to 1,100 K and 1 GPa. The conductivity of the brine-bearing quartzite increases with salinity and fluid fraction, but is almost independent of temperature. Our results suggest that regions of high conductivity (10-3 to 10-2 S/m) in the crust could be explained by the presence of quartzite with fluids of salinity similar to that of seawater. To account for those regions with the highest conductivity of 10-1 S/m, quartzite with fluid of high salinity (>10 wt.%) is required.
KW - Brine
KW - Electrical conductivity
KW - Fluid
KW - High-conductivity anomaly
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U2 - 10.1186/1880-5981-66-2
DO - 10.1186/1880-5981-66-2
M3 - Article
AN - SCOPUS:84900436423
SN - 1880-5981
VL - 66
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 1
M1 - 2
ER -