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从太平洋底发现外星撞击地球的痕迹

彭汉昌 丛友滋 刘正坤 柴之芳 毛雪瑛 庄世杰 徐培苍 李月琴

彭汉昌, 丛友滋, 刘正坤, 柴之芳, 毛雪瑛, 庄世杰, 徐培苍, 李月琴. 从太平洋底发现外星撞击地球的痕迹[J]. 海洋学报, 1996, 18(5): 71-81.
引用本文: 彭汉昌, 丛友滋, 刘正坤, 柴之芳, 毛雪瑛, 庄世杰, 徐培苍, 李月琴. 从太平洋底发现外星撞击地球的痕迹[J]. 海洋学报, 1996, 18(5): 71-81.

从太平洋底发现外星撞击地球的痕迹

基金项目: 国家自然科学基金
  • 摘要: 通过对偶然发现于太平洋M14岩心中的微玻璃陨石的显微特征和物质成分的全面研究,首次发现了撞击坑反弹结构、亲铁元素铱、锇等异常、不定形碳、未饱和无环碳氢化合物、有机质及多种挥发分子,根据这些痕迹和证据肯定了发生于大约2.14~2.30MaBP的一次外星撞击地球事件,并推测撞击地球的外星可能为一彗星碎片;另根据岩心中微玻璃陨石层同该岩心中地磁事件和地磁倒转的联系,进一步论证了这次外星撞击地球事件的发生.最后,笔者提出了发生撞击事件的时代──2.14~2.30MaBP可作为深入研究和划分地质历史中第三纪-第四纪界线的重要参考时代,有待科学家通过更多的发现和长期研究加以验证.
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出版历程
  • 收稿日期:  1994-09-01
  • 修回日期:  1996-03-04

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