Regional Airborne Survey for Geothermal Potential

Survey Results

Survey Equipment & Site Photos

AGG survey was conducted over Kuju and Kirishima areas in 2013, and Hachimantai area in 2014. HeliTEM survey was conducted over Kuju and Kirishima areas in 2014. In 2015, AGG survey is conducted over Yuzawa-Kurikoma, Daisetsuzan(Kamikawa), Niseko and Musadake areas, and HeliTEM survey is conducted over Hachimantai, Yuzawa-Kurikoma, Daisetsuzan(Kamikawa), Niseko and Musadake areas.

150m

surface

100m 150m

AGG

AGG HeliTEM 90km/h Flying speed 70km/h

250m(basic) Line interval 250m(basic) Gravity gradient (fracture, fault) Target Resistivity structure

(thermal alteration)

HeliTEM

Gravity Gradiometer Helicopter

Flying for HeliTEM survey

HeliTEM full view

<Kuju AGG> <Kirishima HeliTEM>

Full range 4‐1,000Ωm

4‐200Ωm 4‐50Ωm

N

N

Airborne survey systems are effective for vast surveying activities in mountainous areas with potential geothermal resources without any modification of land surface. These systems are particularly useful in Japan where about 80% of geothermal resources exist in such mountainous and national park-designated areas. JOGMEC used the surveys with the aim of acquiring basic data for verification of geothermal potential.

AGG(Airborne Gravity Gradiometer) and HeliTEM(Helicopter Time-domain Electro-Magnetic) systems are based on current state-of-the-art technology and has been optimized for airborne broad band geophysical exploration. JOGMEC conducted these systems for the first time in Japan.

(Data acquisition by CGG)

Takigami

Otake

Hatchoubaru

2.30g/cm³

Resis

tivity

(Ωm)

Japan Oil, Gas and Metals National Corporation Geothermal Resource Development Department