Estudio arqueomagnético de seis episodios de combustión de la Cueva Estillín(Burgos, España)

1. Á. Herrejón Lagunilla ¹
2. J.J. Villalaín ¹
3. Á. Carrancho ¹
4. P. Sánchez Yustos ²

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Abstract

Results of the archaeomagnetic study of six combustion episodes from El Estillín Cave are reported. These episodes are part of a fumiers sequence, a type of materials that appears in caves and rock-shelters related to livestock stabling activities from the recent Prehistory (Angelucci et al. 2009). Considering the scarcity of geomagnetic directional data in Iberia before the first millennium BCE, these materials are a source of valuable data to improve and temporary extend secular variation records. The NRM of more than 100 oriented specimens was demagnetized. Additionally, IRM acquisition, backfield curves, hysteresis cycles and thermomagnetic curves were carried out on representative samples. Magnetite is the main ferromagne- tic mineral detected and a magnetization increment (peak) around 200ºC was detected during the heating in the thermomag- netic curves. However, a definitive explanation for this phenomenon has not been yet determined.

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