地学前缘 ›› 2009, Vol. 16 ›› Issue (6): 146-153.

• 论文 • 上一篇    下一篇

Heinrich 3事件的实证:浙江舟山群岛泥裂

贾楠,孙立广,袁林喜,谢周清   

  1. 中国科学技术大学 地球与空间学院, 安徽 合肥 230026
  • 收稿日期:2009-11-09 修回日期:2009-11-18 出版日期:2009-12-16 发布日期:2009-12-10
  • 作者简介:贾楠(1985—),女,博士研究生,环境科学专业。Email: jiananb@mail.ustc.edu.cn
  • 基金资助:

    国家重点基础研究发展计划“973”项目(2010CB428902)

Direct evidence of Heinrich event 3: Desiccation crack in Zhoushan Islands, Zhejiang Province.

 GU Nan, SUN Li-An, YUAN Lin-Chi, XIE Zhou-Qing   

  1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
  • Received:2009-11-09 Revised:2009-11-18 Online:2009-12-16 Published:2009-12-10

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摘要：

在浙江舟山朱家尖岛观音湾海滩地区发现了大量发育良好,深达60 cm的泥裂构造。年代学结果表明,该泥裂构造形成于312～304 ka BP期间。孢粉学和粘土矿物学研究结果表明,该构造揭示了研究区域曾经发生的一次强烈的冷干事件,事件发生时植被衰落。这极可能是第四纪晚期全球范围内发生的气候快速变冷事件Heinrich 3事件的一个直接的景观证据,为第四纪气候快速变化的研究提供了一种新的研究对象。

关键词: 舟山群岛;泥裂;Heinrich 3事件;气候变化

Abstract:

The large desiccation cracks, which are up to 60 cm deep, were developed on the intertidal zone of the Guanyin Bay, Zhujiajian Island, Zhejiang Province. The results from chronological, palynological and mineralogical analysis show that the time of the formation of the desiccation crack is coincident with the period of the environmental change from warm and humid to cold and dry. The desiccation crack corresponds to an abrupt climate shift event during 312304 ka BP, with a decline in vegetation. It is most probable that this phenomenon demonstrates a direct landscape evidence for the worldwide abrupt climate event—the Heinrich event 3. The desiccation crack provides a new method for the research of Quaternary abrupt climate shift events.

Key words: Zhoushan Islands; desiccation cracks; Heinrich event 3; climate shift