PI Country:
Japan, UK, Mauritius
PIs:
Tamaki, K., Ura, T., and Gamo, T.
Ocean:
Indian
Région:
CIR
Année:
2006
Start Date:
7-Dec-06
End Date:
5-Jan-07 We principally focused on advancing the understanding of the Rodriguez Segment (Segments 15 and 16) of CIR (the Central Indian Ridge) where the previous geological and geophysical studies were ongoing as UK and French programs. As reported in IR News from the Ridge Crest online (http://www.interridge.org/RidgeCrestNews): Two possible active hydrothermal sites are newly found during the cruise by the CTD operation and AUV operation. One is in the Segment 15 and the other is in the Segment 16. Although further surveys by ROV or submersible are necessary, the intensive signals of manganese anomaly in the deepsea water suggest strong possibility of existence of active hydrothermal sites.
Ship:
R/V Hakuho-maru
Equipment:
AUV r2D4, seabeam, magnetics, gravity, CTD 
