白亜紀/古第三紀境界における炭素循環擾乱イベント(<特集>顕生代の環境擾乱イベントとその解析)

概要

論文の詳細を見る
Mass extinction event at the Cretaceous-Paleogene (K-P) boundary (65.5Ma) is characterized by the simultaneous disruption in global carbon cycling. Multiple stable carbon isotope profiles in both marine and terrestrial sedimentary sequences have revealed detailed recovery patterns from the perturbations of marine and ocean surface-atmosphere carbon reservoirs. Recent studies suggest a close linkage between carbon cycle recovery and ecosystem diversification in the ocean; but the roles of the exogenic carbon cycle on the terrestrial environment and ecosystem still remain unclear. The leaf wax n-alkanes in the K-P boundary sequence exhibit variations in their molecular distribution and/or isotopic composition associated with the climatic changes, and thus, are a useful proxy for accessing paleoterrestrial environment and also a key of revealing its relation to the carbon cycle perturbation at that time.
日本有機地球化学会の論文
2008-12-30