The influence of temperature on rehydroxylation [RHX] kinetics in archaeological pottery
The influence of temperature on rehydroxylation [RHX] kinetics in archaeological pottery
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DOI：
10.1016/j.jas.2012.06.040
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发表时间：
2013-01-01
影响因子：
2.8
通讯作者：
Wilson, Moira A.
中科院分区：
文献类型：
--
作者：
Hall, Christopher;Hamilton, Andrea;Wilson, Moira A.
几乎所有的考古陶瓷都通过与环境水的化学结合进行缓慢的、渐进的再羟基化。该反应伴随着膨胀，并且还伴随着小但可测量的质量增加，这为RHX测年方法提供了基础。RHX反应的速率随着温度的升高而增加。在这里，我们全面地描述了温度对RHX过程的影响与定年方法的关系。我们依次处理RHX反应的动力学模型，RHX速率的温度依赖性，以及不同环境温度对RHX质量增益的影响。我们定义了一个有效的寿命温度，并展示了如何从估计的寿命温度历史计算。历史气象温度数据被用来估计生命周期的温度历史，这可以调整长期的气候变化。我们还展示了如何允许埋葬在考古遗址上的温度历史的影响。最后，我们描述了RHX年龄估计的不确定性如何依赖于温度历史和有效寿命温度的估计。(C)2012爱思唯尔有限公司保留所有权利。
Almost all archaeological ceramics undergo slow, progressive rehydroxylation by chemical combination with environmental water. The reaction is accompanied by an expansion, and also by the small but measurable mass gain that provides the basis of the RHX dating method. The rate of the RHX reaction increases with increasing temperature. Here we describe comprehensively the effects of temperature on the RHX process in relation to the dating methodology. We deal in turn with the kinetic model of the RHX reaction, the temperature dependence of the RHX rate, and the influence of varying environmental temperature on the RHX mass gain. We define an effective lifetime temperature and show how this is calculated from an estimated lifetime temperature history. Historical meteorological temperature data are used to estimate the lifetime temperature history, and this can be adjusted for long-term climate variation. We show also how to allow for the effects of burial in archaeological sites on the temperature history. Finally we describe how the uncertainties in estimates of RHX age depend on the estimates of temperature history and effective lifetime temperature. (C) 2012 Elsevier Ltd. All rights reserved.