岷江上游营盘山遗址土壤理化特征及指示意义

古遗址地层土壤理化特征研究有助于古环境重建。以岷江上游营盘山遗址文化剖面和黄土剖面为研究对象，分析了土壤粒度、磁化率、有机质和碳酸盐含量及元素地球化学等物理化学指标及其影响因素。结果表明古人类活动影响了土壤粒度、磁化率、有机质、碳酸盐及元素迁移等特征，灰烬层土壤出现了环境指标不一致的现象。位于灰烬层上部的古土壤保留了与成壤强度一致的环境信息，指示出岷江上游干旱河谷区在全新世中晚期曾出现相对温暖湿润的气候特征。利用遗址区文化层剖面重建古环境需多指标对比研究，剔除人类活动的干扰信息。

Physical and Chemical Characteristics of Soils in the Yingpanshan Site and Its Environmental Significance

Physical and chemical characteristics of soil from strata of an ancient cultural site is important to paleoenvironment reconstruction. This study investigated cultural and natural soil profiles in the Yingpanshan site, an ancient cultural site in the upper reaches of the Minjiang river, by analyzing particle size distribution, magnetic susceptibility, element geochemistry, organic matter and carbonate contents of soil samples. Our result showed that ancient human activities did affect the characteristics of soil, such as particle size, magnetic susceptibility, organic matter, carbonate and element migration, causing inconsistent changes among environmental indices. A warmer and moister climatic feature was presented in the drought valley of upper Minjiang river during the mid-late Holocene, which could be demonstrated by pedogenic features of the paleosol above the ash layer. A better reconstruction of paleoenvironment using soils from cultural strata, demands great attentions on multi-proxies and avoiding information mislead by human activities.