Physical and Chemical Analyses of Sediments from around Star Carr as Indicators of Preservation
Physical and Chemical Analyses of Sediments from around Star Carr as Indicators of Preservation
复制标题
对星卡尔周围沉积物的物理和化学分析作为保存指标
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
C. Rolfe
中科院分区：
文献类型：
--
作者：
S. Boreham;J. Boreham;C. Rolfe
摘要本文介绍了一个项目的结果，该项目的重点是调查邻近地区的星星卡尔中石器时代遗址的有机沉积物的恶化。对15个钻孔的沉积序列进行了物理和地球化学分析，以评估矿床的保存状况和潜力。结果表明，由于硫化物化学氧化成硫酸盐，在场址周围的不同地点发生了严重的酸化。这对这些沉积物的保存潜力产生了不利影响。酸化与考古沉积物中发育良好的铁硫（Fe-S）带密切相关，并与每年波动的地下水位密切相关。相比之下，一些序列不断低水位和氧化整个，但其他常年高地下水显示只有适度的酸化。这提供了至少部分地区的中石器时代星星卡尔古湖边缘被更好地保存的可能性，虽然可能容易受到水文制度的变化。
Abstract This paper presents results of a project focused on investigating the deterioration of organic sediments in the area adjacent to the Mesolithic site of Star Carr. Physical and geochemical analyses of sediment sequences from 15 boreholes have been used to assess preservation status and potential of the deposits. The results indicate that severe acidification as a result of chemical oxidation of sulphide to sulphate has occurred at various locations around the site. This has adversely affected the preservation potential of these sediments. The acidification is strongly associated with a well-developed iron-sulphur (Fe-S) zone within the archaeological sediments, and is closely linked to annually fluctuating water tables. In contrast, some sequences had constantly low water tables and were oxidised throughout, but others with perennially high ground water showed only modest acidification. This offers the possibility of at least some areas of the Mesolithic Star Carr palaeo-lake edge being better preserved, although perhaps vulnerable to changes in the hydrological regime.