Balneogeological study of hot springs around Lake Togo in Tottori Prefecture

Abstract

Followings were found after the balneogeological study of hot springs around Lake Togo.
1) The geology around Lake Togo consists of alluvium (deposit of Lake Togo) diluvium (deposit of drowned valley) and substratum of Tertiary deposit and granite.
2) Though the presumption of substratum in the distance of Asazu hot spring, Nagae and Kadota was succeeded by the electric prospecting, that is difficult in the sides of Matsuzaki and Togo hot spring.
3) The ground water bearing layers around Lake Togo consists of deposits of Lake Togo and drowned valley, containing its considerable continuity. But the hot water bearing layer is a part of drowned valley deposit, only having a partial extension.
4) The heat energy of hot spring groups is magmatic water. It is considered that the hot water bearing stratum have been constituted after this heat or hot water raised along cracks of failures cutting bed rocks and then mixed with ground water in the coarse sand layer of drowned valley deposit.