Sulfur isotope systematics in icelandic geothermal systems and influence of seawater circulation at Reykjanes

Details Sulfur isotope systematics in icelandic geothermal systems and influence of seawater circulation at Reykjanes Sulfur isotope systematics in icelandic geothermal systems and influence of seawater circulation at Reykjanes

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44.1223s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Issue 8, pp.1223-1231

Other

5

Scientific paper

Pyrite from altered basalts from Nàmafjall and Krafla high-temperature fields and deep zones at Reykir, Leira and other low-temperature fields, and aqueous sulfides from Nàmafjall, have 34 S values of 0 to 2.6%. These values are close to those for postglacial basaltic lavas from the Reykjanes Peninsula. The major source of sulfur in these meteoric hydrothermal systems is the upper-mantle or basalt. At the low-temperature fields, however, the 34 S values of sulfide decrease with decreasing depth, suggesting the presence of a light sulfur source in the shallower aquifers. In contrast, in the Reykjanes and Svartsengi geothermal fields, where seawater contributes to the hydrothermal systems, sulfide sulfur is distinctly enriched in 34 S at all depths except for one Reykjanes pyrite from 84 m depth. The enrichment is about 8%. at the deepest core (1734 m) of Reykjanes and decreases with decreasing depth. These enrichments are most likely due to seawater sulfate being involved in the hydrothermal systems. However, in the Reykjanes fluid, dissolved heavy sulfates are not in isotopic equilibrium with sulfide. Disequilibrium between sulfate and sulfide is also demonstrated in all other Icelandic geothermal systems studied.

Affiliated with

Also associated with

No associations

Rating

Sulfur isotope systematics in icelandic geothermal systems and influence of seawater circulation at Reykjanes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Sulfur isotope systematics in icelandic geothermal systems and influence of seawater circulation at Reykjanes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sulfur isotope systematics in icelandic geothermal systems and influence of seawater circulation at Reykjanes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1274990