Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island

Details Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3321315a&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 21, CiteID L21315

Other

3

Geochemistry: Hydrothermal Systems (0450, 3017, 3616, 4832, 8135, 8424), Volcanology: Thermodynamics (0766, 1011, 3611), Volcanology: Volcano Monitoring (7280), Volcanology: Lava Rheology And Morphology

Scientific paper

Sulfur speciation in volcanic gases is a potentially valuable tracer of degassing processes at volcanoes. Hitherto, observations of sulfur speciation in volcanic gas plumes have however been limited both in number and quality. Here, we report on periodic measurements of SO2 to H2S proportions in the volcanic gases from La Fossa volcano (Vulcano Island) performed during 2004-2006, a period which encompasses two heating events of the fumarolic field in January-April 2005 and December 2005. Results indicate a systematic relative increase (by a factor of 2-6) of SO2 to H2S proportions in the fumaroles during the heating events, which we ascribe to a temperature increase in the mixing zone between magmatic and hydrothermal fluids. We also demonstrate that sulphur speciation in La Fossa fumaroles reflects re-equilibration within a poly-baric hydrothermal system, and that this hydrothermal re-equilibration erases the pristine SO2/H2S ratios of any magma-derived sulphur present.

Affiliated with

Also associated with

No associations

Rating

Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island 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 Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrothermal buffering of the SO2/H2S ratio in volcanic gases: Evidence from La Fossa Crater fumarolic field, Vulcano Island will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1315201