文献类型：期刊文献

中文题名：中国主要沙漠和沙地碳同位素特征

英文题名：Carbon isotope characteristics of deserts and sandy lands in China

作者：郭翠萍[1] 郭浩[2] 霍俊澎[2] 辛智鸣[3]

第一作者：郭翠萍

机构：[1]北票市台吉林果服务站,北票122122;[2]中国林业科学研究院荒漠化研究所,北京100091;[3]中国林业科学研究院沙漠林业实验中心,磴口015200

年份：2020

卷号：0

期号：2

起止页码：135-140

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2017】；CSSCI:【CSSCI2019_2020】；CSCD:【CSCD2019_2020】；

基金：国家重点研发计划(2016YFC0501004)资助.

语种：中文

中文关键词：碳同位素;沙漠;沙地;地表沉积物;沙尘源

外文关键词：carbon isotope;desert;sandy land;surface sediment;dust source

分类号：X142;P597

摘要：为了解中国沙漠(沙地)的碳同位素(δ13C)特征,分别在中国8大沙漠4大沙地地表采集沉积物样品,采用同位素质谱技术全面分析了样品的碳酸盐碳同位素组成和分布规律。研究结果表明:(1)中国主要沙漠(沙地)碳酸盐δ13C值位于-10.7‰~1.9‰之间,具有明显的区域特点。根据δ13C值分布范围将8大沙漠4大沙地初步分为5个区域:A:库姆塔格沙漠和塔克拉玛干沙漠;B:巴丹吉林沙漠;C:柴达木沙漠和乌兰布和沙漠D:库布齐沙漠、腾格里沙漠和毛乌素沙地;E:古尔班通古特沙漠、呼伦贝尔沙地和科尔沁沙地。(2)中国沙漠(沙地)的δ13C值与采样区域的降雨量密切相关。(3)中国沙漠(沙地)的δ13C值分区性与中国北方大地构造和山脉分布密切相关。
In order to understand carbon isotope characteristics of desert(sandy land)in China,surface sediments were collected in eight deserts and four sandy lands separately.Carbonate carbon isotopic compositions of samples were measured by means of stable isotope ratio mass spectrometry,and the function relations between the value ofδ13C and the average precipitation of research area were studied.The result showed that the carbon isotopic compositions of surface sediments are-10.7‰~1.9‰,with an decreasing trend from west to east.The value ofδ13C is inversely proportional to the average precipitation.It is possible to identify dust sources with the value ofδ13C of sand-dust fallouts due to its significant regional differences.