Noble Gases In Vent Water From The Juan De Fuca Ridge

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Journal Article: Noble Gases In Vent Water From The Juan De Fuca Ridge

Abstract
Hydrothermal vent fluids collected with the DSRV Alvin from the southern limb of the Juan de Fuca Ridge are chemically unique, having chloride concentrations ~2 times ambient seawater. The same fluids contain noble gases in relative abundances like 2°C air-saturated seawater, the expected recharge composition. However, the absolute noble gas abundances are depleted by ~30% relative to seawater. The combination of very high chloride and moderately depleted noble gases appears to require the formation of a Cl-rich, gas-free brine by phase separation. This brine is mixed with recharge seawater at temperatures in excess of ~340°C and, therefore, deep in the hydrothermal system.

Author 
B. M. Kennedy








Published Journal 
Geochimica et Cosmochimica Acta, 1988





DOI 
10.1016/0016-7037(88)90016-6


 

Citation

B. M. Kennedy. 1988. Noble Gases In Vent Water From The Juan De Fuca Ridge. Geochimica et Cosmochimica Acta. (!) .