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High Resolution Analysis of Paleoenvironmental Change by the Simultaneous Methylation Method (TMAH Method)

同时甲基化法（TMAH 法）高分辨率分析古环境变化

基本信息

批准号：
09640587
负责人：
YAMAMOTO Shuichi
金额：
$ 1.66万
依托单位：
Soka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

In this study, we obtained the following results.(1) Retrieval of bio-marker organic compounds on the analyses of oceanic sediments by the TMAH methodLand-derived organic compounds produced by TMAH method are C20-C32 fatty acids, lignins (8 compounds, vanillins, syringyls, cinnamyls), cutin acids (3 compounds), sterols (e.g. beta-sitosterol). On the other side, as marine-derived compounds, C12-C18 fatty acids, sterols (e.g. brassicasterol), phytol, marine cutin acids (6 compounds include new 3 compounds) and cyclohexyl-alkylalcohols (9 compounds) probably originated by bacteria are analyzed.(2) The high resolution analysis of sediment core of California margin (ODP Leg 167, Site 1017)Total organic carbon drastically decreased at the Younger Dryas period, and obviously increased at the last glacial period (12 - 15 kyrs). A clear increase of lignin was also seen at the last glacial period. As it is presumed that the river-system developed to the vicinity of California at this period, the result of lignin suggests the transportation of the land derived organic compounds to this area actively occurred. It is clarified that the contribution of angiosperm has increased gradually from 1 6ka toward the present, as the syringyls/vanillyls ratio of lignin (the contribution index of the angiosperm) increased.(3) Analysis of the Morikita tumulus at Bange-cho in the FukushimaIn the analysis of the Morikita tumulus, we mentioned the position of buried person, the specification of the fiber-like material, the specification of the wood to be used as coffin tub, and differences of vegetation between the present and the Tumulus period.

(1)TMAH法提取海洋沉积物中生物标志物有机化合物TMAH法提取的陆源有机化合物为C20-C32脂肪酸、木质素(8种化合物、香草素、丁香基、肉桂基)、角质酸(3种)、甾醇(如β-谷甾醇)。另一方面，分析了可能来源于细菌的C12-C18脂肪酸、甾醇(如油菜甾醇)、植物醇、海洋角质酸(6个化合物包括新的3个化合物)和环己基烷基醇(9个化合物)。(2)加利福尼亚边缘沉积物岩芯(ODP167腿，1017站)的高分辨率分析表明，总有机碳在年轻的仙女果期急剧下降，在末次冰期(12-15kars)明显增加。末次冰期木质素含量也明显增加。由于推测这一时期的水系发育到加州附近，木质素的结果表明陆源有机化合物向该地区的迁移是活跃的。从16ka到现在，被子植物的贡献率随着木质素的丁香基/香草基比率(被子植物的贡献率)的增加而逐渐增加。(3)福岛班格町的盛木分析在对盛木的分析中，我们提到了埋葬人的位置，纤维状材料的规格，用作棺材的木材的规格，以及现在和图穆勒斯时期植被的差异。