黄土与古土壤容重指标与季风气候变化关系的初步研究——以郑州邙山赵下峪剖面为例

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基金项目:

国家自然科学基金资助项目(编号:49572132)

A PRELIMINARY STUDY ON THE RELATION BETWEEN VOLUMETRIC WEIGHT OF LOESS AND PALEOSOL AND MONSOON CLIMATE CHANGE

1. Institute of geomechanics, Chinese Academy of Geology Sciences;Beijing 100081;
2. State Key Laboratory of Loess and Quaternary Geology Chinese Academy of Science, Xi'an 710054;
3. Open Laboratory of Lake Sediment and Environment, Chinese Academy of Science, Nanjing 210008

摘要: 本文以郑州邙山赵下峪剖面为例,研究了黄土-古土壤序列的容重及其与磁化率、粒度的关系。结果表明,容重与磁化率反映的夏季风变化有显著的正相关关系,与粗颗粒含量反映的冬季风变化有显著的负相关关系;而天然压实作用对S₁₀以上黄土与古土壤容重的贡献可以忽略不计。所以,风成沉积的容重指标综合反映了冬季风与夏季风气候组合关系的变化。
- 黄土古土壤 /
- 容重 /
- 季风气候变化
Abstract: Taking Zhaoxiayu section,Mangshan,Zhengzhou as an example,this paper has studied the volumetric weight of loess-palaeosol sequences and its relation with susceptibility as well as its grain size.It is shown that volumetric weight bears an evident positive correlation to the summer monsoon variations indicated by the susceptibility,an evident inverse correlation to the winter monsoon variations indicated by the content of coarse fraction,and the natural compaction contributes very little to volumetric weight of loess-palaeosol sequences above S₁₀.Volumetric weight can thus be regarded as an indicator to the variations of the combination of winter monsoon and summer monsoon.
- loess-palaeosol sequence /
- volumetric weight /
- monsoon climate variation