蒙城尉迟寺文化层的地质地球化学研究Ⅱ——古遗址气候变化反演及代用指标选择  

Geochemical research on prehistorical culture of Yuchisi Site in Mengcheng Ⅱ——Reconstruction of climatic changes and discussion on proxy selection

作　　者：徐利斌[1,2] 孙立广[1,2] 彭子成[2] 罗泓灏[1,2] 王吉怀[3] 

机构地区：[1]中国科学技术大学极地环境研究室,安徽合肥230026 [2]中国科学技术大学地球和空间科学学院,安徽合肥230026 [3]中国社会科学院考古研究所,北京100710

出　　处：《中国科学技术大学学报》2009年第7期673-682,共10页JUSTC

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-151)资助

摘　　要：考古遗址剖面研究正在突破传统文物考古研究的学科局限，应用孢粉学、地质地球化学等多学科交叉和新技术新方法，提供研究人类历史有意义的信息．通过对安徽蒙城尉迟寺遗址剖面中各种元素、粒度等指标的综合研究分析，区分了剖面各种指标对人为影响、自然影响的响应程度，并且利用主要受自然影响的指标恢复了5050-4000cal．aB．P．间尉迟寺遗址地区的气候变化历史．在与经典亚洲夏季风指标对比的基础上，探讨影响气候变化的原因，以及气候变化与原始文化之间的关系．并在此基础上，提出古遗址剖面气候研究中使用代用指标时需要特别注意的问题．Application of the new methods of palynology, geochemistry and so on can help researches based on the archaeological profile to break free from the disciplinary limitations that beset cultural relic researches, and provide meaningful information for archaeological research. 230 samples were collected from a 460 cm deep sediment profile named YC1 in the Yuchisi Site in Mengcheng, Anhui Province at an interval of 2 cm. The site contains cultural layers of the Dawenkou Culture and Longshan Culture, aged from 5 050 cal. aB. P. to 4 000 cal. aB. P. Based on the statistical analysis of elements and grain size in the cultural layers of Yuchisi Site in Mengcheng of Anhui, the extent of every index responding to human activities and climate was obtained, and the climatic change of Yuchisi Site from 5 050 cal. aB. P. to 4 000 cal. aB. P. was reconstructed using climatic impacting indexes, such as factor2 from Principle component analysis, Al2O3/SiO2 and clay concentration. Results show that the climate in the Dawenkou Culture （from 5 050 cal. aB. P. to 4 400 cal. aB. P. ） was quite warm and wet, but in the Longshan Culture （from 4 400 cal. aB. P. to 4 000 cal. aB. P. ） it was quite cold and dry. From the comparison with classical Asian monsoon index （Stalagmitic δ^18O records in Dongge Cave） and solar activity, the reasons for climatic change, and the correlation between climatic change and cultures in primitive society were discussed. Based on this study, it is recommended that the climatic proxy that is heavily influenced by human activities should be avoided.

关 键 词：尉迟寺遗址 气候变化 主成分分析 气候影响因素 夏季风 人口数量 

分 类 号：X142[环境科学与工程—环境科学]