期刊论文

中文

干旱区资源与环境

1003-7578

2017

31

5

141-145

10.13448/j.cnki.jalre.2017.158

国家自然科学基金项目（41471153） 湖南省自然科学基金项目（2016JJ6015）资助

本校为第一机构

对采集衡阳盆地松木剖面的红粘土进行了ESR定年和元素、碳氧稳定同位素测试分析,结果表明:松木剖面δ~(13)C曲线和δ~(18)O曲线的相位和形状基本相同。碳氧同位素曲线图显示,1.78Ma B. P. ~ 1.56Ma B. P.期间,碳氧同位素偏轻,为温暖湿润气候; 1.56MaB. P. ~ 0.716MaB. P.时期,碳氧同位素稍偏重,指示为冷干气候; 0.716Ma B. P.以后,碳氧同位素偏重,干冷程度比上阶段增强。松木红土剖面δ~(13)C曲线和段家坡黄土剖面δ~(13)C曲线在频率和变化趋势方面相近似,记录了构造尺度上三次气候环境变化,早更新世晚期以来衡阳盆地古气候朝着干冷方向发展,与全球气候波动模式基本一致。

The results of ESR dating, elemental analysis, carbon and oxygen isotopes analysis of the red earth from Songmu profile in Hengyang basin indicate that the phases and shapes of δ^13C curve and δ^18O curve are basically the same. Carbon oxygen isotopes charts display that during the period of 1.78 Ma B.P. - 1.56Ma B. P. , carbon and oxygen isotopes are underweight, it belonged to warm and humid climate ; during 1.56 Ma B. P. -0.716Ma B. P. , carbon and oxygen isotopes are slightly overweight and indicating dry and cold climate; after 0.716Ma B...