@article{oai:nagoya.repo.nii.ac.jp:00011466,
 author = {塚脇, 真二 and Tsukawaki, Shinji and 奥野, 充 and Okuno, Mitsuru and 中村, 俊夫 and Nakamura, Toshio},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {Lake Tonle Sap situated in the central part of Cambodia is the largest lake in the Indochina Peninsula. Unique sedimentary processes due to drastic changes in its water area between the rainy and dry seasons are expected in the lake. Further, it is also expected that regional environmental and climatic changes, and their relationships with the rise and fall of various civilication in the peninsula are able to be reconstructed over the period based on analyses of the lake-bottom sediments. Radiocarbon dating of the lake bottom sediments and a molluscan shell from three horizons of TS96-2 core, 108cm in length, obtained from the northern part of Lake Tonle Sap in May 1996,were carried out by an accelerator mass spectrometer (AMS) of the Dating and Material Research Centre, Nagoya University to grasp sedimentation rates in the northern part of the lake as the first step in a series on pursuing the above-mentioned subjects. Radiocarbon ages of sediments from 103-108cm and 48-53cm below lake floor are 6,070 ±90 and 5,620±120 years B.P., respectively, and an age of a molluscan shell, Corbicula sp., from 20cm below lake floor is 630±100 years B.P. Consequently, sedimentation rates in the northern part of Lake Tonle Sap can be estimated based on these radiocarbon ages with the exception of the age of the molluscan shell which is an obvious reworked sediment. The sedimentation rate had been about 1.2 mm/year since 6,070 to 5,620 years B.P. but it had been drastically decreased about 0.1mm/year since 5,620 years B.P. to present. It is inferred that the marked decrease of the sedimentation rates before and after 5,620 years B.P. was caused by completion of filling up the lake basin at that time., タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 1996 (平成8)年度},
 pages = {125--133},
 title = {<14>^C年代からみたトンレサップ湖北部湖底における過去約6,000年間の堆積速度},
 volume = {8},
 year = {1997}
}