Archeointensities in Greece during the Neolithic period: New insights into material selection and secular variation curve

Fanjat, Grégory; Aidona, Elina; Kondopoulou, D.; Camps, Pierre; Rathossi, Christina; Poidras, Thierry

doi:10.1016/j.pepi.2012.10.011

Cited by 18 publications

(11 citation statements)

References 56 publications

(59 reference statements)

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“…Apart from the two sites presented here, four Greek pottery collections have been analysed within the above frame: ARH and SKS (Tema et al 2012) and Dikili-Tash (DTc) and Vassili (BSc; Fanjat et al 2013). The mean intensities derived from these previous studies are also reported in Table 3, together with our new results.…”

Section: Re-evaluation Of Previous Results Through Magnetic Measurementsmentioning

confidence: 96%

“…Nevertheless, some of these procedures are almost as time consuming as a Thellier experiment and a full success cannot still be guaranteed. For example, our first attempt to obtain archaeomagnetic data from Prehistoric Greek ceramics had also a moderate success (Tema et al 2012) and this was followed by a total failure (Fanjat et al 2013), while in both studies standard magnetic mineralogy experiments and material selection criteria were applied. It is therefore Figure 6.…”

Section: Re-evaluation Of Previous Results Through Magnetic Measurementsmentioning

confidence: 99%

“…• C since the white mica structure persists (Rathossi & Pontikes 2010a;Fanjat et al 2013; Fig. 10a, Table 4).…”

Section: Dikili-tash (Dtc) Ceramic Collectionmentioning

confidence: 99%

“…Additionally, we compiled and extended the corresponding published XRPD data from BSC and DTc sites (Fanjat et al 2013) for a better comparison. The results were used to assess the firing conditions (temperature, atmosphere, duration) and the proportion of Fe-bearing minerals (hematite, magnetite).…”

Section: Detailed Mineralogical Description and Inferred Firing Condimentioning

confidence: 99%

“…The geological background of the archaeological site consists of neogene sediments (marls, red clay, sand) which are in contact with an ophiolitic complex, composed of plutonic and volcanic rocks, (Fanjat et al 2013) and (c) Skala-Sotiros (SKS, SKO). The estimated firing temperature for each sample is given in Table 4.…”

Section: Arhontiko (Arh) Ceramic Collectionmentioning

confidence: 99%

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Investigating the archaeointensity determination success of prehistoric ceramics through a multidisciplinary approach: new and re-evaluated data from Greek collections

Kondopoulou¹,

Gómez‐Paccard

Aidona³

et al. 2017

Geophysical Journal International

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S U M M A R YThe Balkan area provides an almost continuous record of the geomagnetic field variations during the last eight millennia but important data dispersion and chronological gaps are still observed. In order to improve this pattern, we oriented our research towards the study of Greek prehistoric ceramics and pottery collections. We present here new archaeointensity and mineralogical results from pottery and ceramics collected in two Bronze Age sites in Northern Greece, corresponding to the middle third and middle second millennium BC. Thermal demagnetization experiments, thermomagnetic curves, thermal demagnetization measurements of three axes composite isothermal magnetization and first-order reversal curves (FORC) diagrams were performed in order to define the main magnetic carriers and select the most promising samples for archaeointensity determination. The results suggest that the majority of the studied materials are dominated by a mixture of superparamagnetic and stable single domain grains, with very little magnetic interactions. In almost all samples the main magnetic carrier observed is a low coercivity mineral, most probably magnetite and/or Ti-magnetite. Classical Thellier experiments, including both the thermoremanent magnetization anisotropy and cooling rate corrections were performed on the selected samples. Two new archaeointensities were obtained and compared with previous data available for Greece and neighbouring countries and with global geomagnetic field models results. In order to investigate the causes of the high rate of failure observed in our archaeointensity experiments, we re-examined the results obtained from the study of four collections already published by better characterizing the magnetic and mineralogical properties of the studied fragments. Specific hysteresis curves performed at different layers of ceramic fragments reveal an important degree of inhomogeneity. Mineralogical analysis of selected samples from the totality of six Greek prehistoric sites studied, including new X-ray powder diffraction analysis and a detailed description of the different geological contexts, is provided. The results suggest that the sherds were all fired in medium-high temperatures (mostly between 500• and 800• C). The nature of the baked clay paste in response to the local geology appears to account for a part of the variability in magnetic properties. We suggest that X-ray powder diffraction analyses and thorough examination of the geological environment in combination with a satisfactory knowledge of the corresponding excavations history might provide an additional tool to appropriately select pottery fragments before performing future archaeointensity experiments.

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Section: Re-evaluation Of Previous Results Through Magnetic Measurementsmentioning

confidence: 96%

Section: Re-evaluation Of Previous Results Through Magnetic Measurementsmentioning

confidence: 99%

“…• C since the white mica structure persists (Rathossi & Pontikes 2010a;Fanjat et al 2013; Fig. 10a, Table 4).…”

Section: Dikili-tash (Dtc) Ceramic Collectionmentioning

confidence: 99%

Section: Detailed Mineralogical Description and Inferred Firing Condimentioning

confidence: 99%

Section: Arhontiko (Arh) Ceramic Collectionmentioning

confidence: 99%

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Investigating the archaeointensity determination success of prehistoric ceramics through a multidisciplinary approach: new and re-evaluated data from Greek collections

Kondopoulou¹,

Gómez‐Paccard

Aidona³

et al. 2017

Geophysical Journal International

Self Cite

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show abstract

An updated catalogue of Greek archaeomagnetic data for the last 4500 years and a directional secular variation curve

et al. 2013

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National audienceWe present an updated compilation of Greek directional archaeomagnetic data for the last 4.5 millennia. The data set comprises 89 directions from archaeological artefacts and volcanic rocks. Most of the data come from the Late Bronze Age (1700-1400 BC) that is the flourishing period of the Minoan civilization in Crete, while parts of the classical (480-323 BC), Hellenistic (32-31 BC) and Roman (146 BC-330 AD) periods are also well covered. The dataset has been analysed using the Bayesian approach for curve building and a directional secular variation (SV) curve for Greece is proposed. Comparisons with regional and global model predictions show a general agreement even though some discrepancies are observed for some time intervals. The new curves together with the previously published intensity SV curve for Greece, also using the Bayesian approach, form a homogeneous set and enrich our knowledge of the full geomagnetic field vector variation in Greece during the last millennia

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Archaeomagnetic versus luminescence methods: the case of an Early Byzantine ceramic workshop in Thessaloniki, Greece

Aidona

Polymeris

Camps

et al. 2017

Archaeol Anthropol Sci

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Archeointensities in Greece during the Neolithic period: New insights into material selection and secular variation curve

Cited by 18 publications

References 56 publications

Investigating the archaeointensity determination success of prehistoric ceramics through a multidisciplinary approach: new and re-evaluated data from Greek collections

Investigating the archaeointensity determination success of prehistoric ceramics through a multidisciplinary approach: new and re-evaluated data from Greek collections

An updated catalogue of Greek archaeomagnetic data for the last 4500 years and a directional secular variation curve

Archaeomagnetic versus luminescence methods: the case of an Early Byzantine ceramic workshop in Thessaloniki, Greece

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