Archaeomagnetic investigation of bricks from the VIIIth–VIIth century BC Greek–indigenous site of Incoronata (Metaponto, Italy)

Hill, Mimi J.; Lanos, Philippe; Denti, Mario; Dufresne, Philippe

doi:10.1016/j.pce.2008.02.026

Cited by 14 publications

(15 citation statements)

References 23 publications

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“…(2007, 2008) that studied ceramics from the Greek islands of Kos, Lesbos, Thasos, Chios, Rodos and from Asia Minor found in the archaeological sites of Nymphaion and Panticapeaum (Crimean Peninsula). Such high intensities for this period are also supported by data from southern Italy (Evans 1986; Hill et al . 2008) and by the high quality results from three Hellenistic kilns at Katerini, Greece (De Marco et al .…”

Section: The Data Setsupporting

confidence: 82%

“…These results come from the studies of Nachasova et al (2007Nachasova et al ( , 2008) that studied ceramics from the Greek islands of Kos, Lesbos, Thasos, Chios, Rodos and from Asia Minor found in the archaeological sites of Nymphaion and Panticapeaum (Crimean Peninsula). Such high intensities for this period are also supported by data from southern Italy (Evans 1986;Hill et al 2008) and by the high quality results from three Hellenistic kilns at Katerini, Greece (De Marco et al 2008b) with a mean site intensity F site = 85.8 μT. As the scatter of the intensity data and the differences for some time periods are important, the general features of the geomagnetic field in the Balkans were estimated by calculating an averaged SV curve.…”

Section: T H E Data S E Tmentioning

confidence: 54%

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Secular variation of the Earth's magnetic field in the Balkan region during the last eight millennia based on archaeomagnetic data

Tema¹,

Kondopoulou²

2011

Geophysical Journal International

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S U M M A R YThe first archaeomagnetic secular variation (SV) curves for the whole Southern Balkan Peninsula are presented. These are based on all data within a 700 km circle centred at Thessaloniki (40.60 o N, 23.00 o E). This data set consists of 325 directional and 625 intensity data mainly from Greece, Bulgaria, Serbia and southern Hungary. Some data from southern Italy are also included. The sliding moving window technique, was used to calculate a continuous SV curve for intensity while the directional SV curves were calculated using the bivariate extension of the Fisher statistics. These curves are well constrained and clearly show the main features of the geomagnetic field variation in this region during the last eight millennia. Comparisons with the predictions of the SCHA.DIF.3K and SCHA.DIF.8K regional and the CALS7K.2 and ARCH3K.1 global geomagnetic field models show a good agreement for the last 3000 years but differences for older times. The Balkan SV curves identify several rapid changes of the geomagnetic field in eastern Europe and can be used as reference curves for archaeomagnetic dating in the Balkan Peninsula.

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Section: The Data Setsupporting

confidence: 82%

Section: T H E Data S E Tmentioning

confidence: 54%

Secular variation of the Earth's magnetic field in the Balkan region during the last eight millennia based on archaeomagnetic data

Tema¹,

Kondopoulou²

2011

Geophysical Journal International

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“…Our archaeointensity results are consistent ( Fig. 13c) with Italian (Hill et al 2008;Gallet et al 2009) data. The Spanish data (Burakov et al 2006) obtained from potsherds present somewhat higher values that could be explained by the fact that their data were corrected for anisotropy using AMS which give usually a lower correcting factor than TRM anisotropy (Chauvin et al 2000).…”

Section: R E S U Lt Ssupporting

confidence: 90%

Archaeomagnetic results on three Early Iron Age salt-kilns from Moyenvic (France)

Hervé

Schnepp

Chauvin

et al. 2011

Geophysical Journal International

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International audienceVariations of the Earthfs magnetic field during the first millennium BC in western Europe remain poorly constrained, especially archaeointensity changes. Three salt-kilns (MOA, MOB and MOC) sampled in Moyenvic (Lorraine, eastern France) have been studied to provide new reference data. Each kiln has been dated by radiocarbon to originate from the Early Iron Age or Hallstatt period (between VIII and Vth Century BC). Rock magnetic experiments and hysteresis results suggest the predominance of pseudo-single domain (PSD) Ti-poor magnetite. Archaeomagnetic directions obtained by thermal and alternating field demagnetizations have high mean inclination (close to 70.) and declination (between 19 and 31.). A first set of classical Thellier.Thellier experiments was conducted on 46 samples with a laboratory field almost parallel to the direction of the characteristic remanent magnetization (ChRM). Only 24 of these specimens present a linear NRM.TRM plot. For other specimens, NRM.TRM plots are concave-up with positive pTRM checks. The very large dispersion observed between the determined palaeointensity values suggests some artefacts have not been fully recognized. A second set of Thellier experiments was conducted on 34 sister specimens with the laboratory field applied quasi-perpendicular to the ChRM. In these cases,mineralogical evolutions during heating and chemical remanent magnetization acquisitions have been clearly recognized, despite positive pTRM checks. The concave-up shapes of NRM.TRM plots appear mainly due to mineralogical alteration rather than to the presence of PSD.MD grains. For the entire set of samples the success rate of the palaeointensity determinations is very low with 80 per cent of the samples rejected. Nevertheless, reliable mean archaeointensities have been obtained for two of the three kilns (MOA, 80.1 } 14.5 ƒÊT and MOB, 86.6 } 6.9 ƒÊT at the latitude of Paris). The high field strength and the archaeomagnetic directions determined, combined with previous published data, provide further evidence for important changes of the Earth magnetic field in Europe during the first half of the first millennium BC. These large variations of the geomagnetic field during the Iron Ages indicate that archaeomagnetism is highly suitable for dating of structures from this period

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“…Others argue that AARM is preferable because the corrections are usually similar (Ben-Yosef et al, 2008a;Mitra et al, 2013), it is faster to determine the AARM tensor than the ATRM one, and there is no further laboratory alteration with the AARM tensor. Some studies use a partial TRM (pTRM) to determine the ATRM tensor in order to avoid bias introduced by alteration when heating to high temperatures (Chauvin et al, 2000;Genevey and Gallet, 2002;Hill et al, 2008), while total TRMs are used in other studies based on the assumption that total TRM correction avoids the complications of pTRM tails that may affect pTRMs. The use of pTRM checks insures that the ATRM tensor has not been affected by alteration (Shaar et al, 2010(Shaar et al, , 2011.…”

Section: Anisotropy Correctionmentioning

confidence: 99%

Geomagnetic intensity variations for the past 8 kyr: New archaeointensity results from Eastern China

Cai

Tauxe

Deng

et al. 2014

Earth and Planetary Science Letters

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In this study, we have carried out paleointensity experiments on 918 specimens spanning the last ∼7 kyr, including pottery fragments, baked clay and slag, collected from Shandong, Liaoning, Zhejiang and Hebei Provinces in China. Approximately half of the specimens yielded results that passed strict data selection criteria and give high-fidelity paleointensities. The virtual axial dipole moments (VADMs) of our sites range from ∼2 × 10 22 to ∼13 × 10 22 Am 2 . At ∼2250 BCE our results suggest a paleointensity low of ∼2 × 10 22 Am 2 , which increases to a high of ∼13 × 10 22 Am 2 by ∼1300 BCE. This rapid (less than 1000 yrs) six-fold change in the paleointensity may have important implications for the dynamics of core flow at this time. Our data from the last ∼3 kyr are generally in good agreement with the ARCH3k.1 model, but deviate significantly at certain time periods from the CALS3k.4 and CALS10k.1b model, which is likely due to differences in the data used to constrain these models. At ages older than ∼3 ka, where only the CALS10k.1b model is available for comparison, our data deviate significantly from the model. Combining our new results with the published data from China and Japan, we provide greatly improved constraints for the regional model of Eastern Asia. When comparing the variations of geomagnetic field in three global representative areas of Eastern Asia, the Middle East and Southern Europe, a common general trend of sinusoidal variations since ∼8 ka is shown, likely dominated by the dipole component. However, significant disparities are revealed as well, which we attribute to non-dipolar components caused by movement of magnetic flux patches at the core-mantle boundary.

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Archaeomagnetic investigation of bricks from the VIIIth–VIIth century BC Greek–indigenous site of Incoronata (Metaponto, Italy)

Cited by 14 publications

References 23 publications

Secular variation of the Earth's magnetic field in the Balkan region during the last eight millennia based on archaeomagnetic data

Secular variation of the Earth's magnetic field in the Balkan region during the last eight millennia based on archaeomagnetic data

Archaeomagnetic results on three Early Iron Age salt-kilns from Moyenvic (France)

Geomagnetic intensity variations for the past 8 kyr: New archaeointensity results from Eastern China

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