Triaxe archeointensity analysis

Gallet, Yves; Goff, Maxime Le; Genevey, Agnès

doi:10.1016/j.pepi.2022.106924

Cited by 3 publications

(10 citation statements)

References 43 publications

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“…These magnetometers measure the magnetization carried by a small-volume specimen (~0.7 cm 3 ) directly at high temperatures up to 650 °C, with increments of ~5 °C, in zero field or in a field of up to 200 µT in any direction (Le Goff and Gallet, 2004). The experimental protocol developed for the Triaxe has been described elsewhere (e.g., Genevey et al, 2009;Hartmann et al, 2010;Gallet et al, 2022) and we will only highlight its main features below.…”

Section: Archaeointensity Methods and Resultsmentioning

confidence: 99%

“…We note that the R'(Ti) data do not require correction for a potential TRM anisotropy effect because the direction of TRM lab is precisely parallel to that of the primary NRM component used for intensity determination. It has also been shown experimentally that the R'(Ti) data are minimally affected by the cooling rate effect on TRM acquisition (e.g., Le Goff and Gallet, 2004;Genevey et al, 2009;Hartmann et al, 2010;Gallet et al, 2022). This effect generally prevents the determination of intensity values using the ratio of NRM to TRM lab fractions that remain unblocked between Ti and T2, as it primarily affects magnetic grains with high unblocking temperatures.…”

Section: Archaeointensity Methods and Resultsmentioning

confidence: 99%

“…To further minimize the potential impact of cooling rate on TRM acquisition, we systematically used a cooling rate of 10 °C/minute for TRM lab acquisition in our study, instead of the 2 °C/minute rate routinely used so far (Gallet et al, 2022).…”

Section: Archaeointensity Methods and Resultsmentioning

confidence: 99%

“…Numerous archaeomagnetic studies have been conducted in this region in recent years, providing a large set of archaeointensity data (e.g. Gallet and al-Maqdissi, 2010;Shaar et al, 2016;2021;2022;Livermore et al, 2021). Consequently, from the chaos caused by the violent destruction of a site, it becomes possible to establish, with archaeomagnetism, a comparative chronology for the manufacture of the ceramics discovered in the rubble.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An archaeomagnetic intensity-based search for order in the chaos of the destruction of Hama (Syria) dated to 720 BCE

Gallet

Mouamar

Lumsden

et al. 2023

Journal of Archaeological Science: Reports

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Section: Archaeointensity Methods and Resultsmentioning

confidence: 99%

Section: Archaeointensity Methods and Resultsmentioning

confidence: 99%

Section: Archaeointensity Methods and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An archaeomagnetic intensity-based search for order in the chaos of the destruction of Hama (Syria) dated to 720 BCE

Gallet

Mouamar

Lumsden

et al. 2023

Journal of Archaeological Science: Reports

Self Cite

View full text Add to dashboard Cite

“…The current work is part of an ongoing effort to construct a continuous archaeointensity curve for the Levant and Mesopotamia, which is based on laboratory methods that were tested against each other and found to yield compatible results. These methods include the Thellier-IZZI-MagIC method with the LAC criteria (Table 1), the Thellier method modified by Coe (Coe, 1967;Coe et al, 1978) with anisotropy and cooling rate corrections using the criteria of Genevey et al (2003) and the Triaxe method (Gallet et al, 2022;Le Goff & Gallet, 2004). The Extended Methods section in Supporting Information S1 provides a detailed summary of the methods employed in the LAC.…”

Section: Levantine Archaeomagnetic Curve (Lac V20)mentioning

confidence: 99%

Geomagnetic Field Intensity During the First Millennium BCE From Royal Judean Storage Jars: Constraining the Duration of the Levantine Iron Age Anomaly

Hassul,

Shaar,

Vaknin

et al. 2024

Geochem Geophys Geosyst

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The rich and extensively studied archaeological record of the Near East provides an opportunity to develop a comprehensive archaeomagnetic dataset for exploring the behavior of the geomagnetic field with high precision. The Levantine archaeomagnetic curve (LAC) project is an ongoing effort to develop a continuous high‐resolution geomagnetic intensity curve for the Levant and Mesopotamia. The first version of the LAC covered the period between 3000 and 550 BCE. Here, we report archaeointensity data from 169 samples compiled into 32 groups dating between the 7th and the 1st centuries BCE aiming at extending the LAC up to the end of the first millennium BCE. Twenty‐two groups are assembled from storage jar handles bearing different types of royal seal impressions, which were used in Judah as part of a taxation administrative system. These groups are combined with 10 other groups of pottery assemblages, three of which are from Hellenistic destruction layers dated using radiocarbon and coins. The new curve shows that the Levantine Iron Age Anomaly (LIAA) spanned 550 years (1100 ‐ 550 BCE) and that the rate of decline during the last spike around 600 BCE could have reached ∼0.6 μT/year. During the 6th century, the virtual axial dipole moment (VADM) dropped from 160 ZAm2 to 125 ZAm2 after which field intensity only slightly increased to 135 ZAm2, until another considerable decline to ∼90 ZAm2 during the 3rd to the 1st centuries BCE. We highlight the archaeomagnetic implication of the new curve in inferring the relative chronological relationship between different stamp types.

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Thermal profiles in varied experimental firings: Implications for different clays and archaeomagnetism

Kostadinova‐Avramova,

Dimitrov,

Kosterov

2024

Archaeometry

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Thermal profiles of 16 firings performed under various experimental conditions are investigated and compared, with special attention to cooling due to its significance in archaeomagnetism. Samples of different shapes and sizes handmade from six starting clays were fired once and repeatedly followed by magnetic measurements. The collected experimental data provide a broader view of the relationships among firing conditions, clay composition, and final ceramic products.According to direct measurements, open hearths and kilns reach very similar temperatures (800–900°C). Firing temperature and soaking time tend to be linearly related at temperatures around and above 700°C. Soaking time appears to be independent of the structure type around and above 800°C but not below 600°C. Heating rates and times are related exponentially. Only the cooling process distinguishes ’open’ and ’kiln’ firing, with kiln insulation being the primary factor controlling all thermal parameters. A possible relationship between cooling and fuel type is suggested. Cooling in open hearths and kilns differs from that in laboratory furnaces.The magnetic profiles obtained for various clays highlight the differences in composition, grain size, and thermal stability; increasing the number of firings reduces these later.

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Triaxe archeointensity analysis

Cited by 3 publications

References 43 publications

An archaeomagnetic intensity-based search for order in the chaos of the destruction of Hama (Syria) dated to 720 BCE

An archaeomagnetic intensity-based search for order in the chaos of the destruction of Hama (Syria) dated to 720 BCE

Geomagnetic Field Intensity During the First Millennium BCE From Royal Judean Storage Jars: Constraining the Duration of the Levantine Iron Age Anomaly

Thermal profiles in varied experimental firings: Implications for different clays and archaeomagnetism

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