Drilling and geophysical logging data for a 1,262 m‐deep bore hole in the area inferred to overlie the magma reservoir of Kilauea Volcano, Hawaii, support earlier interpretations based on surface geophysical surveys that a zone of brackish or saline water lies above the reservoir. Temperatures encountered within the hole are not sufficiently high to warrant commercial interest; the maximum temperature, 137°C, is at the hole bottom. However, the temperature gradient toward the bottom of the hole (approximately 160 m below sea level) increases sharply to about 370°C/km, perhaps partly reflecting the effect of decreased water circulation as suggested by the geophysical logging data. If this gradient persists or increases with depth, magmatic temperatures would be attained within 3 km from the hole bottom (i.e., approximately 4 km from ground surface)—a depth in accord with data from ground‐deformation and seismic studies.
Additional publication details
|Publication Subtype||Journal Article|
|Title||A deep research drill hole at the summit of an active volcano, Kilauea, Hawaii|
|Series title||Geophysical Research Letters|
|Contributing office(s)||California Volcano Observatory|
|Other Geospatial||Kilauea Volcano|
|Google Analytic Metrics||Metrics page|