{"created":"2021-03-01T06:43:47.481119+00:00","id":8394,"links":{},"metadata":{"_buckets":{"deposit":"1baf5b06-c292-4931-967a-7756231a69e8"},"_deposit":{"id":"8394","owners":[],"pid":{"revision_id":0,"type":"depid","value":"8394"},"status":"published"},"_oai":{"id":"oai:tsukuba.repo.nii.ac.jp:00008394","sets":["3:233:254"]},"author_link":["34876"],"item_12_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1998","bibliographicIssueDateType":"Issued"}}]},"item_12_date_granted_46":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"1998-10-31"}]},"item_12_degree_grantor_44":{"attribute_name":"学位授与大学","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"筑波大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"University of Tsukuba"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"12102","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_12_degree_name_43":{"attribute_name":"取得学位","attribute_value_mlt":[{"subitem_degreename":"博士（理学）"},{"subitem_degreename":"Doctor of Philosophy in Science"}]},"item_12_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In an attempt to explore the rates and mechanism of weathering-ring development, temporal changes in several rock properties due to weathering were investigated and a growth model for the weathering rinds was constructed. The study area is Nasuno-ga-hara, Central Japan, which consists of coalescing alluvial fans with four fluvial terraces and a modern floodplain. The formation ages of these geomorphic surfaces are 0-ka, 20 ka, 320 ka, 450 ka and 830 ka. The time elapsed since the above ages is assumed as the weathering periods. The terrace and floodplain deposits commonly include andesite gravel. The gravel was randomly sampled from the outcrops of each geomorphic surface. All the gravel taken from 320-ka, 450-ka and 830-ka terraces has brown weathering rinds (brown layers) with a thickness of 3-6 mm, which differ from fresh-looking inner parts with gray colour. Rock sample with similar texture were chosen for detailed investigation. The rocks taken from each geomorphic surface are called as O-ka, 20-ka, 320-ka, 450-ka and 830-ka rocks.  ･･･","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_12_description_45":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_description":"1998","subitem_description_type":"Other"}]},"item_12_dissertation_number_47":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第1971号"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"小口，千明","creatorNameLang":"ja"},{"creatorName":"Oguchi, Chiaki 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