プレカンブリア期における月の結節潮と月までの距離
1Department of Atmospheric and Oceanic Sciences, The University of Michigan, Ann Arbor 48109, USA.
Nature
|April 17, 1986
まとめ
研究者らは,プレカンブリア紀前帯状鉄の構造を用いて,古代の月の距離を決定した. この発見は,月軌道の長期的な安定性を支持し,地球の初期の潮の進化に関する新しい洞察を提供します.
科学分野:
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- 地質物理学 地質物理学とは地質物理学です.
- 月科学 月科学 月科学
背景:
- 潮進化の以前のモデルは,遠い過去における地球と月の衝突が,直接的な証拠を欠いて,壊滅的であったことを示唆している.
- 古代の月の距離を理解することは,地球の初期の気候と軌道動態を再構築するために重要です.
研究 の 目的:
- プレカンブリア時代における月の距離を直接決定するために.
- 月面の結節潮が古代の気候パターンに影響を与えたという仮説を検証するために.
主な方法:
- オーストラリアの25億年前の帯状鉄形成 (BIF) の分析.
- 23.3年±0.3年の周期を月面の節点潮のサインとして解釈する.
- 観測された周期性に基づいた古代月の距離の計算.
主要な成果:
- 25億年前のBIFで23.3 ± 0.3年の周期が確認されました.
- この周期性は,月の節点潮の気候の影響に起因する.
- 現在から25億年前の月の計算距離は,約52地球の半径でした.
結論:
- この発見は,プレカンブリア期に月の距離があったという最初の直接的な証拠となる.
- 推論されたプレカンブリア時代の潮摩擦の歴史は,古生物学的なデータと月の軌道安定性と一致しています.
- この方法は,プリカンブリア期の堆積物記録のミランコビッチ周期を分析することによって,古代の月の距離を決定する新たなアプローチを提供している.
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