@base . a , , ; , , ; "Science Reports, Tohoku University, Series 3, Mineralogy, Petrology, and Economic Geology." ; ; ; "0371-3903" ; ; "0371-3903" ; ; "0371-3903" ; "Science Reports, Tohoku University, Series 3, Mineralogy, Petrology, and Economic Geology." , "Science Reports, Tohoku University, Series 3, Mineralogy, Petrology, and Economic Geology" ; . . a ; "0371-3903" ; . a , ; "Science Reports, Tohoku University, Series 3, Mineralogy, Petrology, and Economic Geology" . a . "Japan" . a ; ; "20071210122000.0"^^ ; ; . a ; . a ; "0371-3903" ; .