Electrical conductivity of brine-bearing quartzite at 1 GPa: Implications for fluid content and salinity of the crust

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Abstract

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.

Original languageEnglish
Article number2
JournalEarth, Planets and Space
Volume66
Issue number1
DOIs
Publication statusPublished - 2014

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quartzite
salinity
brine
electrical conductivity
crusts
crust
electrical resistivity
conductivity
fluid
fluids
seawater
temperature

Keywords

  • Brine
  • Electrical conductivity
  • Fluid
  • High-conductivity anomaly

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

Cite this

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title = "Electrical conductivity of brine-bearing quartzite at 1 GPa: Implications for fluid content and salinity of the crust",
abstract = "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.",
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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

PY - 2014

Y1 - 2014

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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