{"_buckets": {"deposit": "196f5597-81e3-4f2d-9147-8633a43b5134"}, "_deposit": {"id": "19795", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "19795"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00019795"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "14C and \u03b413C of drip waters in the Ryugashi Cave, Shizuoka"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2014-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "96", "bibliographicPageStart": "84", "bibliographicVolumeNumber": "25", "bibliographic_titles": [{"bibliographic_title": "\u540d\u53e4\u5c4b\u5927\u5b66\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u696d\u7e3e\u5831\u544a\u66f8"}]}]}, "item_9_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "Stalagmites, which are calcite deposits precipitated from drip water on the floor of a limestone cave, show older age than their true due to dead (14C-free) carbon fraction derived from limestone bedrock. To reveal whether the contribution of dead carbon to the stalagmite calcite remains constant while the stalagmite grows up, we investigated 14C of drip waters in the Ryugashi Cave at Hamamatsu, Shizuoka. In the Ryugashi Cave NO. 3, some drip waters were sampled at three points (Site 1, 2, and 3). The drip waters showed 14C of 71.8 to 92.9 pMC and \u03b413C of-9.5 to -5.9\u2030 at site 1, 14C of 78.6 to 89.5 pMC and \u03b413C of -10.5 to -4.2\u2030 at Site 2, and 14C of 86.9 to 91.8 pMC and \u03b413C of - 9.1 to -10.1\u2030 at Site 3. The 14C and \u03b413C of drip waters tended to be lower in fall and winter, and higher in spring and summer. The drip waters in the Site 3, where a RYGS12 stalagmite sample was sampled, showed little fluctuation of 14C and \u03b413C, having annnual mean values of 88.5\u00b11.5 pMC and -9.4\u58eb0.4\u2030, respectively. The outside air and soil had modern 14C: the outside air showed annual mean 14C of 101.2\u00b11.1 pMC and \u03b413C of -9.4\u571f0.2\u2030, and soil showed 14C of 100.1\u58eb1.1 pMC. The results indicate that the dead carbon fraction has remained constant of around 12% while growing of the RYGS12 stalagmite, and that the RYGS12 can be 14C-dated by a correction of the dead carbon fraction. 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