[B-PT26_2AM1] 古代ゲノム学

[BPT26-02] 地球環境の進化：堆積物記録中に残されたポルフィリンからの観点

*大河内 直彦¹、力石 嘉人¹、菅 寿美¹、小川 奈々子¹ (1.海洋研究開発機構)

キーワード：ポルフィリン, 堆積物, 地球表層環境

Alkyl porphyrins are derivatives of chlorophylls that are formed in the surface of the Earth by photosynthesizers. Structural changes associated with the diagenetic processes have been intensively studied during the last half a century. Now we know that some alkyl porphyrins are derived only from specific chlorophylls that are originated from a specific type of photosynthesizers. Together with carbon and nitrogen isotopic compositions, such structural information provides a profound insight on the critical evaluation of the surface water environment in the geological past. In this presentation, I will review the diagenetic alteration of chlorophyll structures and review the current evidence.