首页 | 本学科首页   官方微博 | 高级检索  
     检索      

呼伦湖东露天矿剖面有机碳的总量及其稳定碳同位素和古环境演化
引用本文:薛滨,王苏民,沈吉,羊向东,马燕.呼伦湖东露天矿剖面有机碳的总量及其稳定碳同位素和古环境演化[J].湖泊科学,1994,6(4):308-316.
作者姓名:薛滨  王苏民  沈吉  羊向东  马燕
作者单位:中国科学院南京地理与湖泊研究所 南京210008
基金项目:国家自然科学基金项目(49172119)
摘    要:湖泊沉积物中有机碳的总量(TOC)取决于湖泊的初始生产力及有机质沉积后的保存能力,而有机碳的稳定同位素(δ~(13)C)值则反映了不同来源有机质的组成以及流域古植被状况。本文通过对内蒙呼伦湖东露天煤矿剖面TOC及δ~(13)C值的垂直分布的研究,结合剖面的沉积特征及孢粉、硅藻分析结果,讨论了呼伦湖地区末次冰期以来古气候古环境演化过程。结果表明有机碳的总量及其稳定碳同位素可作为分析古气候环境的一种有效的代用指标。

关 键 词:湖泊  沉积物  有机碳  稳定同位素  古环境演化
收稿时间:1993/9/24 0:00:00
修稿时间:1994/2/22 0:00:00

Total organic carbon and its stable carbon isotope and paleoenvironmental evolution of donglutian coal profile, Hulun Lake
Xue Bin,Wang Sumin,Shen Ji,Yang Xiangdong and Ma Yan.Total organic carbon and its stable carbon isotope and paleoenvironmental evolution of donglutian coal profile, Hulun Lake[J].Journal of Lake Science,1994,6(4):308-316.
Authors:Xue Bin  Wang Sumin  Shen Ji  Yang Xiangdong and Ma Yan
Institution:Xue Bin Wang Sumin Shen Ji Yang Xiangdong Ma YanNanjing Institute of Geography and Linndology,Chinese Academy of Sciences,Nanjing21008)
Abstract:Total organic carbon (TOC) in lake sediment s depends on the input of organic matter, the primary production of lake itself and its preservation potency while the stable isotope value (13C) of organic carbon reflects the combination of different sources of organic matter and the paleovegetation in the drainage area-According to the vertical distribution of TOC and 13C, combined with the sedunentary characteristics, sporo-pollen and diatom from Donglutian coalfild of Hulun Lake, Inner Mongolia, the paleoenvironmental evolution of this region since last Glaciation has been reconstructed as follows:the lake pioneering period of LGM or a bit later, cold and dry; the highest lake level period of the second half of Post Clacial (13000 -10900 a B. P. ), temperate and wet; Younger Dryas Period (10900- 10600a B. P. ), cold and dry; the higher lake level period at the beginning of Holocene ( 10600-10000a B. P. ), temperate and wet; the intermediate-low lake level in the Early Holocene (10000-7200a B. P. ) , temperate and dry; the higher lake level of Middle Holocene (7200 -5000a B. P. ), warm and wet; the strong shrinkage period in the late Middle Holocene (5000- 3000a B. P. ), temperate and dry.
Keywords:Lake sediments  total organic carbon  stable isotope of oranic carbon  paleoenvironmental evolution  Hulun Lake  
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《湖泊科学》浏览原始摘要信息
点击此处可从《湖泊科学》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号