@article{oai:niigata-u.repo.nii.ac.jp:00028018,
 author = {中川, 勉 and 渡部, 直喜 and 柚原, 雅樹 and 徐, 輝竜},
 journal = {新潟大学積雪地域災害研究センター研究年報, 新潟大学積雪地域災害研究センター研究年報},
 month = {Mar},
 note = {Groundwater circulation was investigated by means of natural spring waters in the western slope of the Gozu mountain which is located in 20km east away from Niigata City and is composed of mainly Cretecious granitic rocks. There is a tectonic line of NNE-SSW direction along the western foot of this mountain. Over the 120 water samples were collected from the western slope of this mountain and surrounding area. We found Ca-HCO_3 type spring waters having higher concentration than other spring waters along similar elevation of 300 to 500 meters above sea level. δ^<18>O values of these Ca-HCO_3 type waters are lower than other waters in surroundings. Such lower values suggest that Ca-HCO_3 type waters are derived from the higher recharge area and are formed by dissolution of plagioclase during longer circulation than others. These indicate that Ca-HCO_3 type waters having lower δ^<18>O values are discharging along the fault fractures of NE-SW direction and are different from the circulation of other groundwaters.},
 pages = {96--107},
 title = {新潟県五頭山西麓の湧水と水文地質構造について},
 volume = {21},
 year = {2000}
}