@article{oai:sucra.repo.nii.ac.jp:00016508, author = {長田, 昌彦 and 松下, 智昭 and 竹村, 貴人 and 高橋, 学}, journal = {埼玉大学地域オープンイノベーションセンター紀要, Report of Comprehensive Open Innovation Center, Saitama University}, month = {}, note = {Rock fractures as a pathway of groundwater have been altered either physically or chemically, and filled with minerals or other fillings depending on circumstances. In this paper, we describe mineralogical and chemical properties of fractures observed in Yakushima granite, along which the wall rocks are solidified. Microscopic observations and EPMA analyses of the solidified part show that cracks are filled with fragments of different kinds in matrix of amorphous calcium carbonate. It is presumed that the calcium carbonate was provided from corals uplifted. This is supported by the results of the radioactive dating that the ages of fillings are always younger than those of the coral., text, application/pdf}, pages = {144--151}, title = {地下水流動経路としての割れ目からの各種情報の取得とその評価に関する基礎研究 : 屋久島の離水サンゴ周辺の割れ目を対象として}, volume = {1}, year = {2009}, yomi = {オサダ, マサヒコ} }