Carbon isotope systematics of CO2, CO and CH4 in fumarolic gases from Satsuma-Iwojima volcanic island, Japan

Details Carbon isotope systematics of CO2, CO and CH4 in fumarolic gases from Satsuma-Iwojima volcanic island, Japan Carbon isotope systematics of CO2, CO and CH4 in fumarolic gases from Satsuma-Iwojima volcanic island, Japan

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ep%26s...54..257s&link_type=abstract

Earth, Planets and Space, Volume 54, p. 257-263.

Computer Science

1

Scientific paper

Carbon isotopic composition (d13C) of CO2, CO and CH4 were determined for fumarolic gases from Satsuma-Iwojima, to range from -3.1 to -2.6°, from -11.6 to -2.8° and from -56 to -37°, respectively. Carbon isotope exchange equilibrium temperature between CO2 and CO was calculated to be ranging from 896° to 950°C for high temperature (691° to 882°C) fumarolic gases, suggesting that CO2 and CO were in isotopic equilibrium near the vent temperature. However, low temperature (<650°C) gases were not in isotopic equilibrium between CO2 and CO under any realistic conditions. The correlations of d13C(CO), CO/CO2 ratio and temperature can be explained in terms of kinetic conversion of CO to CO2 with decreasing temperature. The d13C values of CH4 and CO2 revealed that the CH4 was not equilibrated in carbon isotope exchange reaction with CO2 even at fumarolic gas temperature near 900°C. Correlation of d13C(CH4) and CH4/C2H6 ratio indicate that CH4 of the low CH4/CO2 ratio group (<10-5) is mainly originated from thermogenic decomposition of organic matter, while the high CH4/CO2 ratio group gas (7.7 × 10-4 to 7.4 × 10-3) is contaminated by the CH4-rich gas with d13C value of about -40°.

Affiliated with

Also associated with

No associations

Rating

Carbon isotope systematics of CO2, CO and CH4 in fumarolic gases from Satsuma-Iwojima volcanic island, Japan 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 Carbon isotope systematics of CO2, CO and CH4 in fumarolic gases from Satsuma-Iwojima volcanic island, Japan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbon isotope systematics of CO2, CO and CH4 in fumarolic gases from Satsuma-Iwojima volcanic island, Japan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1409524