まとめ
フルレレン (C60) は,白亜紀-三次紀 (K-T) 境界の煙灰サンプルで発見されました. これは,小惑星の衝突だけでなく,野火が,K-Tイベントでこれらの分子を生成した可能性があることを示唆しています.
科学分野:
- 地質化学 地質化学
- パレオントロジー・パレオントロジー
- 有機化学 オーガニック・ケミストリー
背景:
- クレータ紀-三次紀 (K-T) の境界線は,大量絶滅の出来事を示しています.
- C60を含むフルレンは,複雑な炭素分子である.
- K-T境界における地球外または地球上のフルレレンの起源は議論されている.
研究 の 目的:
- フルレンの含有量について,K-T境界スイッチを分析するために.
- フルレンの濃度と地上の燃焼による濃度を比較する.
- K-T境界フラーレンの火災発生源の可能性を調査する.
主な方法:
- 高圧液体クロマトグラフィー (HPLC) が分離に使用されました.
- 紫外線可視光 (UV-Vis) のスペクトル解析により,C60が特定されました.
- トルウエンの抽出法が試料の準備に使用されました.
主要な成果:
- C60は,ニュージーランドの遺跡からのK-T境界の焦土に検出されました.
- フラーレンの濃度は,百万分の0.1~0.2の範囲であった.
- 同じような量のフラーレンは,一般の炎の煙草にも見つかっていた.
結論:
- K-T境界層のフルレレンは,森林火災から発生した可能性があります.
- K-T衝突イベントに関連した野火は,妥当な情報源である.
- これは,K−T境界フルレネスの影響に基づく説明のみに異議を唱える.
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