Geothermal geology and comprehensive temperature model based on surface and borehole geology in Sengan, Northeast Japan

•Acidic alteration and high-temperature hot springs surround several Quaternary volcanoes within the Sengan area.•Quaternary intrusive granitic-dioritic rocks are distributed beneath the Sengan area.•Sengan area subsurface temperature was estimated based on temperature logging data.•Several high-temperature zones are scattered above sea level in the Sengan area.•The granitic-dioritic magma contributes to the formation of geothermal systems in the Sengan area.