Sapporo Gakuin University (SGU): Repository / 札幌学院大学学術機関リポジトリ
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Teaching, reading, and writing to children with intellectual disabilities using the language, living environment studies, and watercolour learning methods of Steiner schools ～ Exploring the educational effects of integrated experiential activities ～
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Geological Constraints to the Origin of the Earth’s Life
Get PDFBulletin地球生命の起源の研究は，近年著しく進展してきており，新しい視点も導入されてきている。それらの視点をもとに，生命起源に関係する地質学的束縛条件について考察した。まず，地球の対照として月の地質学的特徴を整理した。冥王代の地球から，材料（Eコンドライト）と初期状態（ドライで裸の地球），初期地殻（斜長岩とKREEP玄武岩），後期重爆撃以降に成立したハビタブルトリニティに関する束縛条件をまとめた。次に，生命誕生のために必要な化学進化，エネルギー源，さらに多様で矛盾した化学合成に関する条件から束縛条件を考えた。最後に，地質学的証拠から時間的束縛条件をまとめた。In this paper, the author discusses the chemical variation formed during the solidified process of the Earth. Recently, research of the origin of the Earth’s life has been progressing, and new perspectives introduced into the origin. Based on these perspectives, geological constraints compiled. At first, the geological features of the Moon were reviewed as a contrast to Earth. The boundary conditions from the Hadean Earth, including raw materials (E chondrites) and initial Earth’s state, so called “dry and naked Earth”, primitive crust (anorthosite and KREEP basalt), and the habitable trinity established after late heavy bombardment (LHB), become important. Constraints related to the chemical evolution necessary for Earth’s life origin, energy sources, and the diverse and conflicting conditions for chemical synthesis are discussed. At last, temporal constraints are compiled from geological evidence.departmental bulletin pape
