TY - JOUR AU - Hiroyuki Ii, AU - Hiroshi Kanbara, AU - Yohei Kawabata, PY - 2017/05/30 Y2 - 2024/03/29 TI - GEOTHERMAL AND HOT SPRING WATER ORIGIN DETERMINATION USING OXYGEN AND HYDROGEN STABLE ISOTOPE IN THE TOYOHIRAKAWA CATCHMENT, HOKKAIDO, JAPAN JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 13 IS - 37 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/1559 SP - 127-132 AB - <p>Jyozankei hot spring located near Sapporo City in Hokkaido is famous for many visitors and <br>hot spring quality in Japan. Ground temperatures of 220 °C were reached in the Toyoha Mine10 km west of <br>Jyozankei hot spring where several boreholes less than 2000 m in depth for investigating geothermal water <br>were drilled. Subsequently, a hydrological investigation to clarify the influence of geothermal development <br>on Jyozankei hot Spring was performed. Snow, river, well, spring, hot spring and the geothermal borehole <br>waters in the Toyohirakawa catchment including Jyozankei hot spring were sampled and oxygen and <br>hydrogen stable isotopes of water were analyzed to determine water origin for hot spring and geothermal <br>water. As a result, Jyozankei hot spring and the borehole waters were thought to arise from mixed waters of <br>magmatic and surface waters. Borehole water, from less than 2000 m in depth, was 10 to 30 % of the <br>magmatic water and Jyozankei hot spring water was less than 10 % of the magmatic water. Surface water <br>was recharged at the upstream of the Toyohirakawa catchment, with snow from the upper stream of the <br>northwest catchment being an important resource of surface water for both Jyozankei hot spring water and <br>geothermal water from the boreholes.</p> ER -