scholarly journals In situ Raman quantitative detection of methane concentrations in deep‐sea high‐temperature hydrothermal vent fluids

2020 ◽  
Vol 51 (11) ◽  
pp. 2328-2337
Author(s):  
Lianfu Li ◽  
Xin Zhang ◽  
Zhendong Luan ◽  
Zengfeng Du ◽  
Shichuan Xi ◽  
...  
Keyword(s):  
High Temperature ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Quantitative Detection ◽  
In Situ Raman ◽  
Methane Concentrations

scholarly journals In Situ Quantitative Raman Detection of Dissolved Carbon Dioxide and Sulfate in Deep-Sea High-Temperature Hydrothermal Vent Fluids

2018 ◽  
Vol 19 (6) ◽  
pp. 1809-1823 ◽  
Author(s):  
Lianfu Li ◽  
Xin Zhang ◽  
Zhendong Luan ◽  
Zengfeng Du ◽  
Shichuan Xi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Dissolved Carbon ◽  
Dissolved Carbon Dioxide

scholarly journals Development of an Easy-to-Operate Underwater Raman System for Deep-Sea Cold Seep and Hydrothermal Vent In Situ Detection

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5090
Author(s):  
Qingsheng Liu ◽  
Jinjia Guo ◽  
Wangquan Ye ◽  
Kai Cheng ◽  
Fujun Qi ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Methane Hydrate ◽  
Sulfur Cycle ◽  
Cold Seep ◽  
Remotely Operated Vehicle ◽  
Bacterial Mats ◽  
Optical Module ◽  
In Situ Detection

As a powerful in situ detection technique, Raman spectroscopy is becoming a popular underwater investigation method, especially in deep-sea research. In this paper, an easy-to-operate underwater Raman system with a compact design and competitive sensitivity is introduced. All the components, including the optical module and the electronic module, were packaged in an L362 × Φ172 mm titanium capsule with a weight of 20 kg in the air (about 12 kg in water). By optimising the laser coupling mode and focusing lens parameters, a competitive sensitivity was achieved with the detection limit of SO42− being 0.7 mmol/L. The first sea trial was carried out with the aid of a 3000 m grade remotely operated vehicle (ROV) “FCV3000” in October 2018. Over 20,000 spectra were captured from the targets interested, including methane hydrate, clamshell in the area of cold seep, and bacterial mats around a hydrothermal vent, with a maximum depth of 1038 m. A Raman peak at 2592 cm−1 was found in the methane hydrate spectra, which revealed the presence of hydrogen sulfide in the seeping gas. In addition, we also found sulfur in the bacterial mats, confirming the involvement of micro-organisms in the sulfur cycle in the hydrothermal field. It is expected that the system can be developed as a universal deep-sea survey and detection equipment in the near future.

In Situ Measurements of Chemical Distributions in a Deep-Sea Hydrothermal Vent Field

Science ◽  
1986 ◽  
Vol 231 (4742) ◽  
pp. 1139-1141 ◽  
Author(s):  
K. S. JOHNSON ◽  
C. L. BEEHLER ◽  
C. M. SAKAMOTO-ARNOLD ◽  
J. J. CHILDRESS
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
In Situ Measurements ◽  
Hydrothermal Vent Field

In situ Raman study of C60 polymerization at high pressure high temperature conditions

2002 ◽  
Vol 116 (5) ◽  
pp. 2166-2174 ◽  
Author(s):  
A. V. Talyzin ◽  
L. S. Dubrovinsky ◽  
T. Le Bihan ◽  
U. Jansson
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
In Situ Raman ◽  
Temperature Conditions ◽  
High Pressure High Temperature ◽  
Raman Study

scholarly journals Abundances of Hyperthermophilic Autotrophic Fe(III) Oxide Reducers and Heterotrophs in Hydrothermal Sulfide Chimneys of the Northeastern Pacific Ocean

2008 ◽  
Vol 75 (1) ◽  
pp. 242-245 ◽  
Author(s):  
Helene C. Ver Eecke ◽  
Deborah S. Kelley ◽  
James F. Holden
Keyword(s):  
High Temperature ◽  
Pacific Ocean ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Hydrothermal Sulfide ◽  
Northeastern Pacific ◽  
Endeavour Segment

ABSTRACT The abundances of hyperthermophilic heterotrophs, methanogens, and autotrophic reducers of amorphous Fe(III) oxide in 18 samples of deep-sea hydrothermal vent sulfide chimneys of the Endeavour Segment were measured. The results indicate that conditions favor the growth of iron reducers toward the interiors of these deposits and that of heterotrophs toward the outer surfaces near high-temperature polychaete worms (Paralvinella sulfincola).

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