2024-03-28T18:35:52Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02008845
2023-08-03T05:41:34Z
1642838163960:1642838338003
1642838403551:1642838406414
潜水調査船用多連式ガスタイト海底湧水採取装置の開発
WHATS: a new multi-bottle gas-tight sampler for sea-floor vent fluids
角皆, 潤
土岐, 知弘
中山, 典子
蒲生, 俊敬
加藤, 博之
金子, 将
Tsunogami, Urumu
Toki, Tomohiro
Nakayama, Noriko
Gamo, Toshitaka
Kato, Hiroyuki
Kaneko, Sho
WHATS
fluid sampler
gas sampler
gas-tight
multi-bottle
hydrothermaland cold seep fluid
handling pressured sample
We report a newly developed water sampler WHATS (Water and Hydrothermal-fluid Atsuryoku Tight Sampler), for collecting seafloor venting gas-rich fluid (or gas itself) at in situ pressure (Atsuryoku means pressure in Japanese). It consist of four 150 cm3 stainless steel sample cylinders, eight ball valves, a motor-driven arm, a rail, a peristaltic pump, and a flexible Teflon tube connected to a titanium inlet tube. The motor-driven arm on the rail can open one of the four cylinders. Then, by pumping out pure water that has filled the cylinder, we can introduce sample fluid into the cylinder. After completely replacing the pure water with sample fluid, the valves at both ends of the cylinder are tightly closed by moving the motor-driven arm again. At this stage, the next cylinder becomes to be ready for next sampling. We can take maximum 4 different gas-tight samples in series. Whole operation can be arranged inside the submersible cabin. Use of only one motor to operate valves makes the sampler small, light (28 kg in water), and easy to handle. With the sampler, we can collect almost uncontaminated sample because we pump fluid slowly (120 cm3/min.) into the cylinder using the peristaltic pump. To date, the sampler has been used for ca. 40 dives of shinkai 2000 and shinkai 6500 with the success rate of more the 90%. We also evaluate the safety factors in handling highly pressured samples. We conclude that the sampler can be used to the depth of 3,000 m.\n\nWe report a newly developed water sampler WHATS (Water and Hydrothermal-fluid Atsuryoku Tight Sampler), for collecting seafloor venting gas-rich fluid (or gas itself) at in situ pressure (<i>Atsuryoku</i> means pressure in Japanese). It consists of four 150 cm<sup>3</sup> stainless steel sample cylinders, eight ball valves, a motor-driven arm, a rail, a peristaltic pump, and a flexible Teflon tube connected to a titanium inlet tube. The motor-driven arm on the rail can open one of the four cylinders. Then, by pumping out pure water that has filled the cylinder, we can introduce sample fluid into the cylinder. After completely replacing the pure water with sample fluid, the valves at both ends of the cylinder are tightly closed by moving the motor-driven arm again. At this stage, the next cylinder becomes to be ready for next sampling. We can take maximum 4 different gas-tight samples in series. Whole operation can be arranged inside the submersible cabin. Use of only one motor to operate valves makes the sampler small, light (28 kg in water), and easy to handle. With the sampler, we can collect almost uncontaminated sample because we pump fluid slowly (120 cm<sup>3</sup>/min.) into the cylinder using the peristaltic pump. To date, the sampler has been used for ca. 40 dives of <i>Shinkai 2000</i> and <i>Shinkai 6500</i> with the success rate of more than 90%. We also evaluate the safety factors in handling highly pressured samples. We conclude that the sampler can be used to the depth of 3,000 m.
論文
http://purl.org/coar/resource_type/c_6501
日本地球化学会
The Geochemical Society of Japan
2003
VoR
http://hdl.handle.net/20.500.12000/37632
2188-5923
0386-4073
AN00141280
地球化学
3
37
109
101
jpn
https://doi.org/10.14934/chikyukagaku.37.101
info:doi/10.14934/chikyukagaku.37.101
open access