Curie point depth map in Japan - Evaluation around Hatchobaru Geothermal Area-

Abstract

Okubo et al. (2023) presented Curie point depths (CPD) of the Japanese Islands. We applied the CPD data of Okubo et al. (2023) to the Hatchobaru geothermal field and compared it with other data to evaluate the results of our analysis. We here define Dcmag as a CPD calculated by Curie point analysis of magnetic data and Dchole as a CPD estimated by drillhole temperature – depth curve, respectively. The Dcmag of the Hatchobaru geothermal field was approximately 6.5 to 9.0 km below sea level. This is generally consistent with the Dchole. Although it is necessary to compare the results with other geoscience data for local temperature anomalies, the Curie point analysis is expected to contribute to the geothermal system modeling.