Identification of gradient temperature and heat flow area of geothermal Ijen Volcano Indonesia

Abstract

Abstract A researcher carried out a study about gradient temperature and heat flow in the field of regional area of solfatara Ijen Banyuwangi Regency, East Java province, Indonesia. It is according to the temperature from the surface to about 100 cm deep, while making use of thermocouples with the accuracy of ± 0.5 % and ± 1 °C. Coordinate position measurements using a Garmin GPS device. This research aims to study the distribution of the temperature at any given depth, which is the gradient of temperature at a depth of 2000 m and the value of heat transfer through conduction. Temperature distribution of the depth contour, there are zones with high-temperature, and they increase along with the increase in depth. The gradient of temperature is 35 °C m−1 at a depth of 2000 meters generates 175.6 °C. The maximum heat flow value is always obtained in the presence of sulfur, while the average heat flow of solfatara on the field is 21.08 W m−2.