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首页> 外文期刊>Geosciences >δ 13 C and δ 18 O Stable Isotope Analysis Applied to Detect Technological Variations and Weathering Processes of Ancient Lime and Hydraulic Mortars
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δ 13 C and δ 18 O Stable Isotope Analysis Applied to Detect Technological Variations and Weathering Processes of Ancient Lime and Hydraulic Mortars

机译：δ13​​ C和δ18 O稳定同位素分析用于检测古石灰和水力砂浆的技术变化和风化过程

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Samples of mortars were collected from lime and hydraulic mortars affected by environmental degradation. A total of 63 samples were obtained from Hellenistic, Late Roman and Byzantine historic constructions located at Kavala, Drama and Makrygialos in North Greece. Samples were collected in sections from the surface up to 6 cm deep using a drill-core material. The first sample was collected from the external layer, while the internal samples were collected each 1cm beeper from the previous, in order to monitor the moisture ingress. Isotopic data will make it possible to create an ideal Hellenistic and Byzantine mortar layer and to provide weathering gradients. The isotopic values comprise a range of δ 13 C and δ 18 O values from ?17.1‰ to 1.2‰ and ?25.9‰ to ?2‰, respectively. The weathering process of Hellenistic and Byzantine are expressed, by the regression lines δ 18 O calcite matrix = 0.6 × δ 13 C calcite matrix ? 1.9 and δ 18 O calcite matrix = 0.6 × δ 13 C calcite matrix ? 2.0 for hydraulic and Lime mortars respectively. Pronounced isotopic shift to heavy or light δ 13 C and δ 18 O in the carbonate matrix was attributed to the primary source of CO 2 (atmospheric versus biogenic) and H 2 O (evaporation of local primary water), in residual limestone and in secondary processes such as recrystallization of calcite with pore water and salts attack. Exogenic processes related to biological growth are responsible for further alterations of δ 18 O and δ 13 C in lime mortars. This study indicated that stable isotope analysis is an excellent tool to fingerprint the origin of carbonate, the environmental setting conditions of mortar, origin of CO 2 and water during calcite formation and to determine the weathering depth and the potential secondary degradation mechanisms.
机译：从受环境退化影响的石灰和水硬性砂浆中收集砂浆样品。从位于希腊北部的卡瓦拉，话剧和马克里贾洛斯的古希腊建筑，罗马晚期建筑和拜占庭式建筑中总共获得了63个样本。使用钻芯材料从表面到深达6 cm的部分切片收集样品。第一个样品是从外层收集的，而内部样品是从上一个蜂鸣器每隔1厘米的蜂鸣器收集的，以监测水分的进入。同位素数据将可以创建理想的希腊化和拜占庭式砂浆层，并提供耐候性梯度。同位素值的δ13 C和δ18 O值范围分别从？17.1‰至1.2‰和？25.9‰至？2‰。用回归线δ18 O方解石矩阵= 0.6×δ13 C方解石δ表示希腊化和拜占庭化的风化过程。 1.9和δ18 O方解石基体= 0.6×δ13 C方解石基体2.0分别用于液压砂浆和石灰砂浆。碳酸盐基质中同位素向重或轻δ13 C和δ18 O的明显迁移，归因于残余石灰石和次生中CO 2的主要来源（大气与生物成因）和H 2 O（局部主要水的蒸发）。方解石与孔隙水和盐分的重结晶等过程。与生物生长有关的外生过程导致石灰砂浆中δ18 O和δ13 C的进一步变化。这项研究表明，稳定的同位素分析是识别碳酸盐的成因，砂浆的环境环境条件，方解石形成过程中的CO 2和水的起源以及确定风化深度和潜在的二次降解机理的出色工具。

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