摘要
通过对陕西眉县清湫村全新世黄土剖面的野外考察研究、粒度分析和磁化率测定，揭示了在渭河阶地自然地带性土壤褐土的形成过程中，由于气候恶化和风尘堆积，以及仰韶文化期人类农业耕垦和聚落建设活动的影响，造成了某些区域全新世古土壤分裂为两层的现象．根据清湫村全新世黄土剖面层序模式，论证了全新世时期风尘堆积仍在继续，古土壤覆盖层亦具有风尘堆积的性质。
It is observed that there are two remarkable palaeosol layers on the Holocene loess profile in Qingqiucun Site, Co.Meixian of Shaanxi Province. They are separated by an eolian loess bed with Neolithic remains in it, such as colored pottery, polished stone implements etc. Particle size analysis and magnetic susceptibility measurements prove further that this Holocene loess sequence could be subdivided from the top to the bottom into:modern ploughed soil(MS), eolian loess(L 0), palaeosol (S 0 upper ),eolian loess (L x), palaeosol(S 0 lower ), loessial transition(L t), and eolian Malan Loess(L 1). This is much different from the classical subdivisions of the Holocene loess profile in the Weihe river valley and also on the Loess Plateau, which is normally MS, L 0,S 0,L t,L 1 on a profile. This study indicates that the Holocene palaeosol is splited due to the eolian dust deposition under the climatic deterioration and the Neolithic farming during 7000～5000aB.P. meanwhile, the stratigraphical sequence on the Qingqiucun profile reveals that the eolian dust deposithon was never stopped completely in the Holocene. Pedological process was dominant and dust deposition was slowed in the warmer humid periods; Dust deposition overcame the pedological process in the colder drier periods. While ancient land use and agricultural activities made it much more complex, farming records were found not only in the soil beds (S 0 upper ,MS), but also in the loess beds(L x,L 0) on the Qingqiucun profile.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第2期72-76,共5页
Journal of Shaanxi Normal University：Natural Science Edition
基金
陕西省自然科学基金
关键词
全新世
成壤过程
人文因素
渭河阶地
Holocene
pedological processes
human dimension
weihe river plain
