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Dating a medieval pottery workshop of the city of Burgos (Spain): Archaeomagnetic and archaeological evidences
Physics of the Earth and Planetary Interiors ( IF 2.3 ) Pub Date : 2021-05-01 , DOI: 10.1016/j.pepi.2021.106723
Ángela Herrejón-Lagunilla , Juan José Villalaín , Ángel Carrancho , Carmen Alonso-Fernández , Javier Jiménez-Echevarría , Francisco Javier Pavón-Carrasco

Here we report a detailed archaeomagnetic and rock-magnetic study of a pottery kiln from Burgos (Spain) to reconstruct its burning conditions and date its last use and abandonment age. During the course of a rescue archaeological excavation carried out in 2015 in the center of Burgos city, a medieval pottery workshop was discovered. Two well-preserved kilns appeared and archaeomagnetic analyses were performed on one of them. In addition to a large amount of pottery remains, some numismatic and documental evidences provided a general chronological estimation, but the abandonment age of the workshop remains unknown. On the basis of the existing archaeological information we carried out an archaeomagnetic study in order to date its last use. 69 archaeomagnetic samples were collected from the combustion chamber and the kiln's fire tunnel. Stepwise alternating field and thermal demagnetization of the natural remanent magnetization (NRM) were carried out to retrieve the mean direction. Additional experiments consisted in the acquisition of isothermal remanence (IRM), low-field magnetic susceptibility and its anisotropy as well as thermomagnetic curves. Despite the high temperatures expected in the combustion chamber, it appeared that the bricks´ samples from the fire tunnel exhibit the most successful directional results. Magnetite and variable contributions of hematite are the main ferromagnetic minerals observed in the thermomagnetic curves. The type of lithology studied, its previous magnetic history and their location in the kiln strongly condition the observed directional and rock-magnetic results. Additionally, AMS data revealed the manufacturing fabric of the fire tunnel's bricks, showing moderately high anisotropy degrees, but not enough to casts doubts on the directional NRM record. In order to test the reproducibility of the dating results, archaeomagnetic dating was carried out using different geomagnetic field models and the Iberian paleosecular variation curve. The small differences observed in the dating results are mainly due to the density and type of input data of these records. The combination of the archaeomagnetic analyses with the archaeological and documental suggests that last kiln's usage took place during the first half of the XVIth century CE. Overall, this paper illustrates how the combination of archaeological data and archaeomagnetic analyses may improve our understanding about the manufacturing processes, use and age of abandonment of archaeological combustion structures.



中文翻译:

约会布尔戈斯市(西班牙)的中世纪陶器作坊:考古和考古证据

在这里,我们报告了对来自布尔戈斯(西班牙)的陶窑的详细古地磁和岩磁研究,以重建其燃烧条件并确定其最后使用和废弃年龄。在2015年布尔戈斯市中心的救援考古发掘过程中,发现了一座中世纪的陶艺作坊。出现了两个保存完好的窑炉,并对其中一个进行了古磁分析。除了大量的陶器残骸外,一些钱币和文献证据还提供了一般的时间顺序估计,但车间的废弃年龄仍然未知。根据现有的考古学信息,我们进行了一次地磁研究,以便确定其最后一次使用日期。从燃烧室和窑炉的火道中收集了69个古磁性样品。进行了自然剩余磁化(NRM)的逐步交变磁场和热消磁,以检索平均方向。其他实验包括等温剩磁(IRM),低场磁化率及其各向异性以及热磁曲线的获取。尽管预期燃烧室中会出现高温,但似乎从火洞中取出的砖块样品显示出最成功的定向结果。磁铁矿和赤铁矿的变化成分是在热磁曲线中观察到的主要铁磁矿物。研究的岩性类型,其先前的磁历史及其在窑中的位置强烈地影响了所观察到的定向和岩石磁结果。此外,AMS数据还揭示了消防隧道的制造结构。s的砖块,具有中等程度的各向异性度,但不足以对定向NRM记录产生怀疑。为了测试测年结果的可重复性,使用不同的地磁场模型和伊比利亚古生物变化曲线进行了古地磁测年。在约会结果中观察到的细微差异主要是由于这些记录的输入数据的密度和类型。考古磁学分析与考古和文献资料的结合表明,最后一座窑的使用发生在十六世纪上半叶。使用不同的地磁场模型和伊比利亚古生物变化曲线进行了古地磁定年。在约会结果中观察到的细微差异主要是由于这些记录的输入数据的密度和类型。考古磁学分析与考古和文献资料的结合表明,最后一座窑的使用发生在十六世纪上半叶。使用不同的地磁场模型和伊比利亚古生物变化曲线进行了古地磁定年。在约会结果中观察到的细微差异主要是由于这些记录的输入数据的密度和类型。考古磁学分析与考古和文献资料的结合表明,最后一座窑的使用发生在十六世纪上半叶。世纪CE。总体而言,本文说明了考古数据与考古磁学分析的结合如何提高我们对考古燃烧结构的制造过程,用途和废弃年代的了解。

更新日期:2021-05-08
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