地理科学 ›› 2009, Vol. 29 ›› Issue (6): 923-928.doi: 10.13249/j.cnki.sgs.2009.06.923

• 论文 • 上一篇    下一篇

江苏兴化DS浅孔沉积物地球化学元素与粒度所揭示的古环境意义

舒强1, 赵志军1, 陈晔1, 张茂恒1, 李吉均1,2   

  1. 1. 南京师范大学地理科学学院 江苏省环境演变与生态建设重点实验室, 江苏 南京 210046;
    2. 兰州大学资源环境学院, 甘肃 兰州 730000
  • 收稿日期:2009-02-26 修回日期:2009-05-11 出版日期:2009-11-20 发布日期:2009-11-20
  • 作者简介:舒强(1975- ),男,重庆人,博士,副教授,主要从事环境演变方面的研究工作。E-mail:xjshuqiang@sina.com;xjshuqiang@sohu.com
  • 基金资助:
    国家自然科学基金项目(40501075、40671193、40471135)资助。

Palaeoenvironmental Significance of Geochemistry Elements and Grain Size of DS Core Sediments in Xinghua,Jiangsu Province

SHU Qiang1, ZHAO Zhi-jun1, CHEN Ye1, ZHANG Mao-heng1, LI Ji-jun1,2   

  1. 1. College of Geography Science, Nanjing Normal University;Key Laboratory of Environmental Evolution and Ecological Construction of Jiangsu Province, Nanjing, Jiangsu 210046;
    2. Department of Geography, Lanzhou University, Lanzhou, Gansu 730000
  • Received:2009-02-26 Revised:2009-05-11 Online:2009-11-20 Published:2009-11-20

摘要: 选择位于东亚季风典型区的苏北盆地沉降中心附近湖沼沉积为研究对象,进行了AMS14C、粒度、地球化学元素的综合分析。分析表明,末次冰消期以来苏北盆地古气候经历了冷干、暖湿、温湿、冷暖波动剧烈、暖湿的变化过程。苏北盆地DS钻孔沉积物所揭示的气候变化与贵州董歌洞石笋氧同位素数据和格陵兰冰芯数据所揭示的气候变化总体变化趋势大体一致,但在一些细部上还是存在着差异,较好的响应了区域环境和全球气候变化。

Abstract: A sediment core of the typical area of East Asian monsoon from North Jiangsu Basin was chosen for the study.Based on the analyses of geochemistry elements and grain size of DS core sediments from the basin, the paper probed into the characteristics and the environmental significance of geochemistry elements ratios and grain size.The results show that regional palaeoenvironmental changes were divided into five periods:cool and dry period of 13,700-11,310 cal a B P, and include Younger Dryas Event;warm and moist period of 11,310-9,100 cal a B P;temperate and moist period of 9,100-7,710 cal a BP;temperature and humidity fluctuated high frequency period of 7,710-6,480 cal a B P;warm and moist period of 6,480-0 cal a B P.The records of climatic and environmental evolution of DS core were in accordance with the GRIP oxygen isotope record and Donggedong’s stalagmite oxygen isotope record approximately.It responded to regional environmental and global abrupt climatic changes.

中图分类号: 

  • X141/P595