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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Oxidizable carbon ratio dating ： ウィキペディア英語版 Oxidizable carbon ratio dating Oxidizable carbon ratio dating is a method of dating in archaeology and earth science that can be used to derive or estimate the age of soil and sediment samples up to 35,000 years old. The method is experimental, and it is not as widely used in archaeology as other chronometric methods such as radiocarbon dating. The methodology was introduced by Archaeology Consulting Team from Essex Junction in 1992.〔Frink, Douglas S. (1992) The Chemical Variability of Carbonized Organic Matter Through Time. ''Archaeology of Eastern North America'' 20: 67-79.〕〔Frink, Douglas S. (1994) The Oxidizable Carbon Ratio (OCR): A Proposed Solution to Some of the Problems Encountered with Radiocarbon Data. ''North American Archaeologist'' 15(1): 17-29 ()〕〔Frink, Douglas S. (1995) Application of the Oxidizable Carbon Ratio (OCR) Dating Procedure and its Implications for Pedogenic Research. In ''Pedological Perspectives in Archaeological Research''. SSA Special Publication 44. Soil Science Society of America: Madison, WI.〕 == Process == This dating method works by measuring the ratio of oxidizable carbon to organic carbon. If the sample is freshly burned there will be no oxidizable carbon because it would have all been removed by the combustion process. Over time this will change and the amount of organic carbon will decrease to be replaced by oxidizable carbon. By measuring the ratio of oxidized carbon to organic carbon (the OCR) and applying it to the following equation the age of the sample can be determined with a very low standard error.〔Douglas S. Frink. ("Application of the Oxidizable Carbon Ratio (OCR) Dating Procedure and its Implications for Pedogenic Research". ) Accessed November 2, 200.〕 :$\backslash text\_\backslash text\; =\; \backslash frac\; \backslash times\; \backslash text\; \backslash times\; \backslash text\}\backslash times\backslash sqrt\backslash times\; 14.4888\}$ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oxidizable carbon ratio dating」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.