Time-Domain Electromagnetics At Haleakala Volcano Area (Thomas, 1986)
Exploration Activity: Time-Domain Electromagnetics At Haleakala Volcano Area (Thomas, 1986)
|Exploration Activity Details|
|Location||Haleakala Volcano Area|
|Exploration Technique||Time-Domain Electromagnetics|
Controlled-source electromagnetic soundings were found to be substantially more successful in the southwest rift than either the Schlumberger or the self-potential studies. This was largely due to the ability of time-domain methods to penetrate high-resistivity surface layers and thus to define lower-resistivity sections at depth. The results of this sounding study, which was conducted at elevations ranging from 75 to 497 m a.s.l., generally indicated moderate- to lowresistivity (6 - 7 ohm.m) sections to depths of 1 km on the lower rift zone and higher resistivities (12-16 ohm.m) beneath the upper rift zone (B. R. Lienert, pers. commun., 1984). These results were interpreted to indicate that temperatures in the range of 60degrees C and possibly as high as 96degrees C were present at depths of approximately 1 km near the coast and that a colder freshwater lens was present farther inland.
- Donald M. Thomas (1 January 1986) Geothermal Resources Assessment In Hawaii