SUBMARINE GROUNDWATER Electromagnetic IMAGINING
 

This marine CSEM project will use a newly developed surface-towed marine electromagnetic Porpoise CSEM array system that is owned by the Scripps Institution of Oceanography EM laboratory. 2D and 3D CSEM inversion algorithms will be implemented to image and characterize the spatial distribution and interconnectivity of submarine groundwater systems offshore the island of Hawai‘i.

Link to the survey website: IkeWai Marine CSEM
Download the project description: IkeWaiMarineCSEM.pdf

Schematic illustration of the Porpoise surface-towed CSEM system.

Schematic illustration of the Porpoise surface-towed CSEM system.

The marine CSEM survey layout: The red lines denote the parallel survey towlines, whereas the black lines represent the survey crosslines. Right inset: Bathymetry/elevation map of the island of Hawaiʻi. The survey area is indicated by black rectangular.

The marine CSEM survey layout: The red lines denote the parallel survey towlines, whereas the black lines represent the survey crosslines. Right inset: Bathymetry/elevation map of the island of Hawaiʻi. The survey area is indicated by black rectangular.

Porpoise array alignment along crossline 1. Our chase boat is positioned at the end of the 1 km array of Porpoise E-field receivers.

Porpoise array alignment along crossline 1. Our chase boat is positioned at the end of the 1 km array of Porpoise E-field receivers.

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Survey total coverage: Data was acquired along 15 survey lines offshore the island of Hawai’i, parallel to the Hualalai groundwater system. The color bar represents bathymetric depth that ranges from 10 m (red) to 100 m (blue).  

Power spectrograms showing the E-Field signal as recorded by each one of the Porpoises in days 4 and 5 of the survey. Note the decade in the signal as a function of the offset from the CSEM transmitter and transmitted Amps. The distinctive bands represent the strongest harmonics of waveform-D (3 Hz, 7 Hz, 13 Hz) that is used in this survey.

Power spectrograms showing the E-Field signal as recorded by each one of the Porpoises in days 4 and 5 of the survey. Note the decade in the signal as a function of the offset from the CSEM transmitter and transmitted Amps. The distinctive bands represent the strongest harmonics of waveform-D (3 Hz, 7 Hz, 13 Hz) that is used in this survey.

Time-lapse of surfaced-towed CSEM, Multi-Beam, and Sound Velocity Profile Instruments Recovery.

GAS HYDRATE mapping
 

Marine CSEM geophysicist for the University of Southampton (Ph.D. project). The development of a robust controlled-source electromagnetic (CSEM)-seismic-rock physics joint-interpretation scheme; for the detection, delineation, and quantification of sub-seafloor gas hydrate structures, Off shore Norway. For this purpose, I processed, analyzed and interpreted separately and jointly three datasets: CSEM, seismic and sediment cores datasets. These datasets are compared with SCA/DEM effective medium models to derive the hydrate saturation accurately.


BLACKSMITH & KAJIYA: gas hydrate industry PROJECTS
 

Marine EM geophysicist consultant for Ocean Floor Geophysics. The project involved the operation of a CSEM array, acquisition, and processing of large dataset, to yield a high-resolution imaging of three
gas hydrate fields, Offshore Japan. The data were acquired by a towed CSEM system, employing the Vulcan instrument that was developed by the Scripps Institution of Oceanography. Project link


BLUEMINING: seafloor massive sulfide (sms) RESEARCH  

Marine EM geophysicist for the University of Southampton. The aim of this project is to detect and characterize seafloor massive sulfide (SMS) accumulations at extinct hydrothermal systems, at the vicinity of the active TAG hydrothermal vent. My part in this project included: CSEM survey design (pre-survey synthetic modeling), operating the University of Southampton CSEM deep-towed system, data processing, generating pseudosections and initial 2D Pmax modeling. Preliminary results provide significant evidence for the existence of SMS deposits at these extinct hydrothermal systems. Project link

Blue Mining Project Research Cruise: The Blue Mining project is an international European consortium of 19 large industry and research organisations on various maritime fields of expertise, the "Blue Mining" consortium, will develop solutions that will bring sustainable deep sea mining a big step closer.