The chloride anion is known to be the most abundant salt ion in sea water. At the regions such as
ODP Sites 1249 and 1250 the highly enriched chloride concentration is observed in a zone
extended from near the sediment surface (~1 mbsf) to depths about 25 mbsf. Here, we designed
the in-situ electric circuit system for measuring chloride concentration within reliable accuracy. In
the cylindrical cell the 5-10 tubes having holes on the wall and electrodes were equipped around
clay mixture. The open holes were made to regulate to a certain degree the interface area between
methane gas and clay sample. As may be anticipated, the chloride concentration abnormally
increased under fast rate condition for forming methane hydrate, but no noticeable concentration
change was detected under relatively low rate. In fact, the present experiment seems to be a lot
deficient to investigate the ion diffusion and moreover does not fully reflect the real deep-sea
floor condition, but the meaningful results for describing the abnormal salinity enrichment might
be drawn. The physical effects of chloride anions on surface morphologies of methane hydrate
formed in the sediments were additionally examined with the Field Emission-Scanning Electronic
Microscope (FE-SEM).
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/1154 |
| Date | 07 1900 |
| Creators | Seol, Jiwoong, Koh, Dongyeon, Cha, Minjun, Lee, Huen, Lee, Youngjoo, Kim, Jihoon |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | text |
| Rights | Seol, Jiwoong; Koh, Dongyeon; Cha, Minjun; Lee, Huen; Lee, Youngjoo; Kim, Jihoon |
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