Precise reconstruction of variation in paleovegetation during Cretaceous hot period by analyses of terrestrial plant-derived organic molecules in sediments

通过分析沉积物中陆生植物源有机分子精确重建白垩纪炎热期古植被变化

• 批准号: 23540542
• 负责人: SAWADA Ken
• 金额: $ 3.33万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540542/
• 关键词: 古植生解析; 陸域環境変動; 植物バイオマーカー; ケロジェン; 抵抗性高分子; 白亜紀; 植物化石; 熱化学分解分析; バイオマーカー; 熱分解分析; 熱化学分解; 被子植物進化

The objective of this study is to reconstruct long time scale variations in paleovegetation and terrestrial paleoenvironment by analyses of terrestrial plant-derived biomarkers and kerogens in sedimentary rocks from the Cretaceous Yezo Group, Hokkaido, Japan. In particular, we found rapid changes in angiosperm / gymnosperm vegetation ratio and coniferous vegetation evaluated by analysis of terrestrial plant terpenoid biomarkers. Moreover, we suggest that composition of long chain n-alkanols released from resistant macromolecule in kerogen can be useful as an indicator of deciduous broad leaf plant vegetation. Variation in the paleovegetation using the long chain n-alkanols released from kerogen is almost synchronous to that in angiosperm / gymnosperm vegetation using terrestrial plant biomarkers, confirming high applicability of the released n-alkanol proxy for reconstructing paleovegetation from ancient sediment.

本研究的目的是通过分析日本北海道白垩纪虾夷群沉积岩中陆生植物来源的生物标志物和干酪根，重建古植被和陆地古环境的长期尺度变化。特别是，我们发现通过陆生植物萜类生物标志物分析评估被子植物/裸子植物植被比例和针叶植被的快速变化。此外，我们认为干酪根中抗性大分子释放的长链正烷醇的组成可用作落叶阔叶植物植被的指示剂。使用干酪根释放的长链正烷醇的古植被变化几乎与使用陆地植物生物标志物的被子植物/裸子植物植被的变化同步，证实了释放的正烷醇代理对于从古代沉积物重建古植被的高度适用性。

项目成果

Evaluation of paleoenvironment using terpenoid biomarkers in lignites and plant fossils from the Miocene Tokiguchi Porcelain Clay Formation at the Onada mine, Tajimi, central Japan

使用日本中部多治见 Onada 矿中新世 Tokiguchi 瓷土组褐煤和植物化石中的萜类生物标志物评估古环境

• DOI: 10.1016/j.coal.2012.10.013
• 发表时间: 2013
• 影响因子: 5.6
• 作者: Sawada; K.; Nakamura; H.; Arai; T. Tsukagoshi M.
• 通讯作者: T. Tsukagoshi M.

骨化石中のコレステロールの炭素同位体組成を用いた海生哺乳類の古食性解析の研究

利用化石骨骼中胆固醇碳同位素组成进行海洋哺乳动物古食分析研究

• 发表时间: 2011
• 作者: 新村龍也; 沢田健
• 通讯作者: 沢田健

Paleoenvironmental variations recorded by kerogens in middle Miocene turbidite sediments of the Kawabata Formation, central Hokkaido, Japan

日本北海道中部川端组中中新世浊积岩沉积物干酪根记录的古环境变化

• 发表时间: 2014
• 作者: Takaaki Mori; Ken Sawada; Satoshi Furota; Gentaro Kawakami
• 通讯作者: Gentaro Kawakami

Paleoproductivity of dinoflagellate and cyanobacteria during the mid-Cretaceous Oceanic Anoxic Events in the Vocontian Basin, SE France

法国东南部 Vocontian 盆地白垩纪中期海洋缺氧事件期间甲藻和蓝藻的古生产力

• 发表时间: 2013
• 作者: Takuto Ando; Ken Sawada; Reishi Takashima; Hiroshi Nishi
• 通讯作者: Hiroshi Nishi

Pyrolysis and thermochemolysis of kerogens from sedimentary rocks of the Permian / Triassic transition in the Meichan section, South China

华南梅产剖面二叠/三叠纪过渡沉积岩干酪根的热解与热化学作用

• 发表时间: 2013
• 作者: Shuji Ogata; Ken Sawada; Kunio Kaiho
• 通讯作者: Kunio Kaiho