中国科学D辑(英文版)
中國科學D輯(英文版)
중국과학D집(영문판)
SCIENCE IN CHINA（SCIENTIA SINICA）
2003年
10期
1003-1011
,共9页
侯圣山%杨石岭%孙继敏%丁仲礼
侯聖山%楊石嶺%孫繼敏%丁仲禮
후골산%양석령%손계민%정중례
oxygen isotope ratio%quartz%atmosphere dust%provenance
Oxygen isotope compositions were measured in quartz grains extracted from a 7.0 Ma red clay-loess sequence at Lingtai and six late Pleistocene loess sediments(Malan loess). Results show that the changes in oxygen isotope compositions of Malan loess are basically controlled by the geochemical characteristics of the source materials, while the effect of weathering process after dust deposition could be minor. The oxygen isotope distribution of quartz grains from red clay at Lingtai is similar to that of the overlying loess-paleosol sequence, thus indicating that the red clay at Lingtai has the same eolian origin as the loess-paleosol deposits. Furthermore, the oscillations of the isotope compositions in 4-16 μm-sized quartz grains may reflect the changes, to some extent, of the climatic systems of the source region.
