@book{oai:u-ryukyu.repo.nii.ac.jp:02008854, author = {Toki, Tomohiro and Ishibashi, Jun-ichiro and Noguchi, Takuroh and Tawata, Miki and Tsunogai, Urumu and Yamanaka, Toshiro and Nakamura, Kentaro}, month = {Jan}, note = {Hydrothermal fluids were collected from five hydrothermal fields around the Southern Mariana Trough backarc spreading center for chemical and isotopic analyses. Yamanaka site was interpreted as inactive, so we present results from Snail, Archaean, Pika and Urashima sites. The slightly low pH and negative alkalinity suggests a little bit input of magmatic volatiles, supported by high CO2 concentrations. Consequently low pH would lead to the hydrothermal fluids rich in Fe compared to the MOR hydrothermal fluids., 図書の1章}, publisher = {Springer Japan}, title = {Chemical and isotopic compositions of hydrothermal fluids at Snail, Archaean, Pika, and Urashima sites in the southern Mariana Trough}, year = {2015} }