@article{oai:niigata-u.repo.nii.ac.jp:00028016,
 author = {柚原, 雅樹 and 相楽, 渉 and 高橋, 俊郎 and 渡部, 直喜 and 山岸, 宏光 and 丸井, 英明},
 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 = {The^<87>Sr/^<86>Sr and ^<143>Nd/^<144>Nd ratios, Rb, Sr, Sm and Nd concentrations were determined in surface waters and rocks collected from the Hieda-yama landslide area, Nagano Prefecture. The change of trace element concentrations, ^<87>Rb/^<86>Sr and ^<147>Sm/^<144>Nd ratios in andesite by chemical weathering supports dissolution of plagioclase by this process as indicated in Sagara et al. (1997). The ^<87>Sr/^<86>Sr and ^<143>Nd/^<144>Nd ratios, however, are almost constant, because Sr and Nd isotopic ratios among minerals have small variation. This is caused by its young formation age. The ^<87>Sr/^<86>Sr and ^<143>Nd/^<144>Nd ratios of surface waters in the Kanayama-sawa river are close to those ratios of andesites. However, ^<87>Rb/^<86>Sr and ^<147>Sm/^<144>Nd ratios are lower than the ratios of andesites. These observations indicate that Sr and Nd in surface waters originated from plagioclases of these andesites.},
 pages = {73--82},
 title = {長野県稗田山崩壊地周辺に分布する岩石および地表水のSr・Nd同位体比組成},
 volume = {21},
 year = {2000}
}