The progressive southward reoccupation of territories of the Iberian Peninsula by the Christian kingdom against the Muslims from the eighth century AD onwards is a well-known process. However, there are few well-dated sites of this period, especially in the northern plateau of Spain. Here we report the full vector archaeomagnetic dating of two hearths from the archaeological site of La Pudia I (Caleruega, Castile-and-León, Spain). Both hearths were archaeomagnetically investigated in order to date their last use linked to the abandonment of the site. The archaeomagnetic direction was analysed through thermal (TH) and stepwise alternating field (AF) demagnetization of the natural remanent magnetization (NRM). Pseudo-single domain slightly substituted magnetite was identified as the main magnetic carrier. Thellier–Coe type absolute archaeointensity determinations were carried out on 48 samples from both hearths. The mean directions obtained were independently analysed both at sample and at specimen levels yielding very similar results but statistically distinguishable at 95% confidence level. The archaeomagnetic dating was carried out by comparing the mean directions and archaeointensity values of both hearths with the SHA.DIF.14k geomagnetic field model. The results obtained are in agreement with the archaeological context, suggesting that the abandonment of the archaeological site took place between the end of ninth century and the first half of the eleventh century AD. These results provide one of the first evidences of independently well-dated sites of the Christian conquest in the Iberian northern plateau at the onset of the Early–High Middle Ages.

中文翻译：

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拉普迪亚遗址（Caleruega，布尔戈斯，西班牙）的两个炉膛的完整矢量古地磁年代测定，对伊比利亚北部高原的中世纪人口繁殖过程提出了新的限制

从公元八世纪开始，基督教王国对穆斯林逐渐向南重新占领了伊比利亚半岛的领土，这是一个众所周知的过程。但是，这一时期的约会地点很少，尤其是在西班牙北部高原。在这里，我们报告了拉普迪亚一世考古遗址（西班牙卡莱鲁加，卡斯蒂利亚-莱昂，西班牙）的两个炉膛的完整矢量古电磁定年。对两个炉膛进行了古地磁研究，以便确定其最后一次使用与遗弃地点有关。通过自然剩磁（NRM）的热（TH）和逐步交变磁场（AF）消磁分析了古磁方向。伪单畴微取代磁铁矿被确定为主要的磁性载体。Thellier-Coe型绝对古菌强度测定是对两个炉膛的48个样品进行的。分别在样品和样品水平上对获得的平均方向进行了独立分析，得出了非常相似的结果，但在95％置信水平下具有统计学上的区别。通过将两个炉床的平均方向和古强度值与SHA.DIF.14k地磁场模型进行比较来进行古地磁定年。获得的结果与考古学背景相符，这表明考古遗址的废弃发生在9世纪末至公元11世纪上半叶。