TY - GEN
T1 - Imaging hydrothermal mineral deposits area by reflection seismic processing using Vertical Cable Seismic and Ocean Based Sound Source
AU - Seino, Yutaro
AU - Tokuyama, Hidekazu
AU - Ashi, Juichiro
AU - Tara, Kenji
AU - Asakawa, Eiichi
AU - Asano, Yasuhiro
AU - Saito, Akira
PY - 2017/3/30
Y1 - 2017/3/30
N2 - For the estimation of the hydrothermal mineral deposits reserves, geophysical exploration is indispensable, and the practical geophysical survey was conducted in 2013 at the Izena cauldron in the Okinawa trough, known distribution area of the hydrothermal deposits. Shallow seismic data were successfully acquired by the Vertical Cable Seismic method with the Ocean Based Sound Source (VCS-OBSS system). The OBSS system can generate high frequency waves of 1kHz Ricker wavelet, and high resolution data were acquired at this complex hydrothermal area. The data were processed by the three-dimensional Pre-Stack Depth Migration (3D-PSDM) method, and the output volume size was 160m × 220m × 400m. As a result of the interpretation, several continuous reflectors were detected, considering to be indicating the buried sulfide ore mound and the stockwork zone. This study concludes that the VCS-OBSS system is one of the effective geophysical methods for the exploration of the ocean bottom hydrothermal mineral deposits.
AB - For the estimation of the hydrothermal mineral deposits reserves, geophysical exploration is indispensable, and the practical geophysical survey was conducted in 2013 at the Izena cauldron in the Okinawa trough, known distribution area of the hydrothermal deposits. Shallow seismic data were successfully acquired by the Vertical Cable Seismic method with the Ocean Based Sound Source (VCS-OBSS system). The OBSS system can generate high frequency waves of 1kHz Ricker wavelet, and high resolution data were acquired at this complex hydrothermal area. The data were processed by the three-dimensional Pre-Stack Depth Migration (3D-PSDM) method, and the output volume size was 160m × 220m × 400m. As a result of the interpretation, several continuous reflectors were detected, considering to be indicating the buried sulfide ore mound and the stockwork zone. This study concludes that the VCS-OBSS system is one of the effective geophysical methods for the exploration of the ocean bottom hydrothermal mineral deposits.
KW - 3D-PSDM
KW - buried sulfide ore mound
KW - hydrothermal mineral deposits
KW - Izena cauldron
KW - Okinawa trough
KW - stockwork zone
KW - VCS-OBSS system
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U2 - 10.1109/Techno-Ocean.2016.7890756
DO - 10.1109/Techno-Ocean.2016.7890756
M3 - Conference contribution
AN - SCOPUS:85018327797
SP - 22
EP - 27
BT - Techno-Ocean 2016: Return to the Oceans
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th Techno-Ocean, Techno-Ocean 2016
Y2 - 6 October 2016 through 8 October 2016
ER -