Conduction models of the temperature distribution in the East Rift Zone of Kilauea Volcano

Temperature variations in the 1966-meter Hawaii Geothermal Project well HGP-A are simulated by model studies using a finite element code for conductive heat flow. Three models were generated: a constant temperature source from a vertical dike; a constant heat-generating magma chamber; and a transient heat source from a tapered vertical dike. Fair correlation is obtained between the HGP-A well temperature and the tapered dike 125 years after it is injected with an initial (transient) 1200° C temperature. Results provide background information from which to evaluate the importance of water convection in maintaining the temperature distribution in the East Rift Zone.