欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
将中坝遗址5ka以来连续沉积地层按文化序列分为12层，分别测量Rb、Sr和Cr、Cu含量，对比显示，Cr／Cu比值与Rb／Sr比值明显正相关。Cr与Rb的属性相似，Cr化学活性低，易于在粉砂质沉积物中富集；而Cu和Sr在成壤过程中容易迁移，在粘土质沉积层中含量较高。通过对Cr、Cu元素在表生环境下的化学性质、沉积地层的属性、微地貌特征、与泥炭腐殖化度古里雅冰芯氧同位素曲线等指标对比表明，Cr／Cu比值变化对环境干湿变化的指示具有普遍意义。
英文摘要：
Applying distribution characteristics of chemical elements during soil-forming process to resume palaeoenvironmental evolution is a key field in the research of past global changes. This paper divided the continuous strata of the Zhongba site in Chongqing into 12 sub-layers according to cultural sequence over last 5 ka, measuring Rb, Sr, Cr and Cu contents respectively by XRF and ICP-AES methods. Results indicated that Cr has similar chemical nature as Rb with low activity and is apt to deposit in fine sand materials. Meanwhile, Cu and Sr are easy to be transported over the weathering process and enrich in claypan. A linear regression demonstrated that Cr/Cu ratios are positively relative to Rb/Sr ratios. After comparing variation curves of Cr/Cu ratios with climatic records of peat humification in Hongyuan, northeast region of the Tibet Plateau in last 5 ka, they both are well consistent with each other. Therefore, this paper suggested that Cr/Cu ratios as Rb/Sr be a reliable proxy to indicate palaeoenvironment even with higher accuratcy. Obviously, Cr/Cu ratios will be significant in geo-archaeological research.
同期刊论文项目
同项目期刊论文
Charecteristics of paleoflood deposits archived in unit T0403 of Yuxi Site in the Three Gorges reser
Research on the relationship between site function and environment at the site of Zhongba, Chongqing
Animal diversities and characteristics of environmental change revealed by skeletons unearthed at Zh
Relations between man and nature reflected by the evolution of the Neolithic production tools in the
Relation between human existence and environment viewing from the distribution of prehistoric archae
Spore-pollen-climate factor transfer function and paleoenvironment reconstruction in Dajiuhu,Shennon
Environmental archaeology of the Dachang region in the Daning Valley, the Three Gorges reservoir reg
Relationship between the temporal-spatial distribution of archaeological sites and natural environme
High-resolution geochemistry records of climate changes since late-glacial from Dajiuhu peat in Shen
Rise and decline of ancient salt industry revealed by Na and Ca concentrations in sediments at Zhong
期刊信息
位置：