AMS 14 C Measurements of Dissolved Inorganic Carbon in Pore Waters from a Deep-Sea “Cold Seep” Giant Clam Community Off Hatsushima Island, Sagami Bay, Japan
Bibliographic Data
| ID | 9241985 |
|---|---|
| Authors | Toshiyuki Masuzawa (0000-0001-6779-8860), Hiroyuki Kitagawa (0000-0002-2336-3416), Takeshi Nakatsuka (0000-0001-8855-4793), Nobuhiko Handa, Toshio Nakamura |
| Year | 1995 |
| Volume | 37 |
| Issue | 2 |
| Pages | 617-627 |
| Publication date | 1995-01-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/s003382220003112x |
| OpenAlex | W2298803304 |
| Language | EN |
| References cited | 15 |
We collected pore waters using an in situ pore water-squeezer for a submersible Shinkai 2000 at six depths beneath the sediment surface within a deep-sea “cold seep” giant clam community off Hatsushima Island, Sagami Bay, Japan. A box core sample was also collected ca. 4.5 km east of the community and pore waters were separated. Dissolved inorganic carbon (DIC) was extracted and purified in a vacuum line and 14 C concentration was determined with a Tandetron accelerator mass spectrometer at Nagoya University after conversion to graphite targets using a batch Fe-catalytic hydrogen reduction method. ∆ 14 C values decreased with increasing depth to −938‰ at the sulfate concentration minimum. This indicates that methane used for the active reduction of sulfate and formation of hydrogen sulfide, which is used by symbiotic chemoautotrophic bacteria in gills of the giant clams, is almost dead and is likely supplied from the deep. ∆ 14 C values of DIC vary linearly with δ 13 C values along a mixing line between that in the bottom water and that produced by the oxidation of dead methane. The δ 13 C value of DIC oxidized from dead methane is estimated to be ca. −45
Anaerobic oxidation of methane · Bay · Cold seep · Deep sea · Dissolved organic carbon · Methane · Mineralogy · Pore water pressure · Remineralisation · Sulfate · Chemistry · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Methane Hydrates and Related Phenomena · Environmental Chemistry · Geology · Inorganic Chemistry · Oceanography
| Citation velocity | historical |
|---|---|
| Highly cited | No |