期刊论文

中文

地理科学

1000-0690

2018

38

2

300-306

10.13249/j.cnki.sgs.2018.02.017

(41471153):国家自然科学基金项目 (2016JJ6015):湖南省自然科学基金项目 (41471153):National Natural Science Foundation of China (2016JJ6015):Natural Science Foundation of Hunan Province

本校为第一机构

通过对衡阳市区高兴红土剖面元素含量分析、磁化率分析和ESR年代测定,探讨该剖面的低频磁化率值(χlf)、Rb/Sr值、化学蚀变指数(CIA)、退碱系数(Bc)和化学淋溶系数(BA)等的分布特征及其古气候意义。研究表明:①样品Rb/Sr值与化学风化参数值有显著的相关性,磁化率值与化学风化参数值有很好的相关性,Rb/Sr比值和磁化率值一同可以作为红土沉积古环境变化的替代性指标,极好地记录了衡阳盆地更新世以来古气候的变化,大致可以划分为3个阶段:2.23~1.323 Ma B.P.期间,Rb/Sr值和磁化率值为相对高值区,气候特征为温暖湿润;1.323~0.76 Ma B.P.期间,Rb/Sr值、低频磁化率值和CIA值呈现最高值区,气候为本区最温...

Based on the analysis of elements, magnetic susceptibility and Electron Spin Resonance (ESR) dat-ing of samples from Gaoxing red clay profile in Hengyang City. The result indicates that: the Rb/Sr ratios and chemical weathering parameters values of Gaoxing profile showed a significant positive correlation, and the magnetic susceptibility ratios and chemical weathering parameters values showed a good positive correlation. The results revealed that Rb/Sr ratios and magnetic susceptibility values would be alternative index in red clay sedimentary environmental. recording the climate change in Hen...