High alkalinity due to sulfate reduction in the CLAM hydrothermal field, Okinawa Trough

Details High alkalinity due to sulfate reduction in the CLAM hydrothermal field, Okinawa Trough High alkalinity due to sulfate reduction in the CLAM hydrothermal field, Okinawa Trough

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991e%26psl.107..328g&link_type=abstract

Earth and Planetary Science Letters, Volume 107, Issue 2, p. 328-338.

Other

6

Scientific paper

High alkalinity ( > 1.8 mmol kg-1), pH (4.7-5.3), and ammonium ( ~ 5 mmol kg-1) in hydrothermal fluids from the JADE and CLAM sites in the Mid-Okinawa Trough back-arc basin demonstrate organic matter decomposition during high-temperature fluid-sediment interaction. The endmember fluid from the JADE site ( ~ 320°C black smoker), which is free of Mg and SO4, has similar chemical characteristics as those at the Escanaba Trough, one of the representative sediment-hosted ridge systems in the eastern Pacific. On the other hand, fluid samples from the CLAM site ( ~ 100°C) show remarkably high alkalinity (10.3 mmol kg-1) comparable to the highest alkalinity of 10.6 mmol kg-1 (Guaymas Basin) yet observed in hydrothermal fluids, and significantly higher δ34S of SO4 ( > 25‰) than ambient seawater (21‰). It is suggested that sulfate reduction plays a dominant role in decomposing organic matter to increase alkalinity in the CLAM site. Variation of the δ34S values of H2S (from -0.2 to +3.0‰) in the CLAM fluids taken from different vents suggests that the CLAM site should consist of multiple local hydrothermal systems in different evolutionary stages with regard to sulfate reduction.

Affiliated with

Also associated with

No associations

Rating

High alkalinity due to sulfate reduction in the CLAM hydrothermal field, Okinawa Trough 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 High alkalinity due to sulfate reduction in the CLAM hydrothermal field, Okinawa Trough, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High alkalinity due to sulfate reduction in the CLAM hydrothermal field, Okinawa Trough will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1717171