KFU. Card publication. Archaeomagnetic investigations in Bolgar (Tatarstan)

KAZAN
FEDERAL UNIVERSITY

- RUS
- 中文
- ES

ARCHAEOMAGNETIC INVESTIGATIONS IN BOLGAR (TATARSTAN)

Form of presentation

Articles in international journals and collections

Year of publication

2020

Язык

английский

Authors, employees of KFU

Kosareva Lina Raisovna, author

Kuzina Dilyara Mtygullovna, author

Luneva Olga Viktorovna, author

Nurgaliev Danis Karlovich, author

Khasanov Damir Irekovich, author

Other authors

Sitdikov Airat , author

Spassov Simo , author

Suttie Neil , author

Bibliographic description in the original language

Kosareva L.R., Kuzina D.M., Nurgaliev D.K., Sitdikov A.G., Luneva O.V., Khasanov D.I., Suttie N., Spassov S. Archaeomagnetic investigations in Bolgar (Tatarstan) // Studia Geophysica et Geodaetica. 64(2), p. 255-292

Annotation

The objective of this study is to provide a well-dated point for a future palaeosecular variation (PSV) reference curve for western Russia. For this purpose archaeomagnetic and magnetic property analyses were carried out on a pottery kiln unearthed at the UNESCO World Heritage site of ancient Bolgar, having a rather precise age dating. The archaeological context provided an age between 1340 and 1360 C.E. The characteristic remanence vector was determined through alternating field demagnetisation and Thellier-Thellier palaeointensity experiments. Some innovations were introduced regarding palaeointensity. The check testing the equality of blocking and unblocking temperature was redefined. This allowed waiving the commonly used additional zero-field cooling steps during the Thellier-Thellier experiment. Another innovation concerns the calculation of archaeointensity at structure level. A Bayesian approach was introduced for averaging individual specimen archaeointensities using a prior probability distribution of unknown uncertainties. Next, an additional prior probability distribution was used to correct for cooling rate effects. This resulted in a lower uncertainty compared to common practice and in eluding time consuming cooling rate experiments. The complex magnetic mineralogy consists of maghaemite, multi-domain haematite and Al-substituted haematite. Some samples contained also some non-stoichiometric magnetite. The magnetic mineralogy was determined through hysteresis loops, backfield and remanence decay curves, measurements of the frequency dependence of magnetic susceptibility and through low temperature magnetisation curves. Accompanying hightemperature thermomagnetic analyses revealed an excellent thermo-chemical stability of the studied specimens. Directions obtained from alternating field demagnetisation and those extracted from archaeointensity experiments are congruent and have low uncertainties. The obtained archaeomagnetic results are fairly in agreement with global geomagnetic field models and contemporary PSV data of the wider area. The geomagnetic field vector obtained for ancient Bolgar is of high quality, deserving thus its inclusion in a future PSV reference curve for European Russia.

Keywords

archaeology, Golden Horde, archaeomagnetism, Thellier-Thellier method, Bayesian statistics, geomagnetic field, palaeosecular variation, magnetic property analyses

The name of the journal

Studia Geophysica et Geodaetica

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/159398/F_Kosareva2020_Article_ArchaeomagneticInvestigationsI.pdf?sequence=1&isAllowed=y

URL

https://link.springer.com/article/10.1007/s11200-019-0493-3

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=238721&p_lang=2

Resource files

File name	Size (MB)	Format
F_Kosareva2020_Article_ArchaeomagneticInvestigationsI.pdf	1,54	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Kosareva Lina Raisovna	ru_RU
dc.contributor.author	Kuzina Dilyara Mtygullovna	ru_RU
dc.contributor.author	Luneva Olga Viktorovna	ru_RU
dc.contributor.author	Nurgaliev Danis Karlovich	ru_RU
dc.contributor.author	Khasanov Damir Irekovich	ru_RU
dc.contributor.author	Sitdikov Airat	ru_RU
dc.contributor.author	Spassov Simo	ru_RU
dc.contributor.author	Suttie Neil	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Kosareva L.R., Kuzina D.M., Nurgaliev D.K., Sitdikov A.G., Luneva O.V., Khasanov D.I., Suttie N., Spassov S. Archaeomagnetic investigations in Bolgar (Tatarstan) // Studia Geophysica et Geodaetica. 64(2), p. 255-292	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=238721&p_lang=2	ru_RU
dc.description.abstract	Studia Geophysica et Geodaetica	ru_RU
dc.description.abstract	The objective of this study is to provide a well-dated point for a future palaeosecular variation (PSV) reference curve for western Russia. For this purpose archaeomagnetic and magnetic property analyses were carried out on a pottery kiln unearthed at the UNESCO World Heritage site of ancient Bolgar, having a rather precise age dating. The archaeological context provided an age between 1340 and 1360 C.E. The characteristic remanence vector was determined through alternating field demagnetisation and Thellier-Thellier palaeointensity experiments. Some innovations were introduced regarding palaeointensity. The check testing the equality of blocking and unblocking temperature was redefined. This allowed waiving the commonly used additional zero-field cooling steps during the Thellier-Thellier experiment. Another innovation concerns the calculation of archaeointensity at structure level. A Bayesian approach was introduced for averaging individual specimen archaeointensities using a prior probability distribution of unknown uncertainties. Next, an additional prior probability distribution was used to correct for cooling rate effects. This resulted in a lower uncertainty compared to common practice and in eluding time consuming cooling rate experiments. The complex magnetic mineralogy consists of maghaemite, multi-domain haematite and Al-substituted haematite. Some samples contained also some non-stoichiometric magnetite. The magnetic mineralogy was determined through hysteresis loops, backfield and remanence decay curves, measurements of the frequency dependence of magnetic susceptibility and through low temperature magnetisation curves. Accompanying hightemperature thermomagnetic analyses revealed an excellent thermo-chemical stability of the studied specimens. Directions obtained from alternating field demagnetisation and those extracted from archaeointensity experiments are congruent and have low uncertainties. The obtained archaeomagnetic results are fairly in agreement with global geomagnetic field models and contemporary PSV data of the wider area. The geomagnetic field vector obtained for ancient Bolgar is of high quality, deserving thus its inclusion in a future PSV reference curve for European Russia.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	archaeology	ru_RU
dc.subject	Golden Horde	ru_RU
dc.subject	archaeomagnetism	ru_RU
dc.subject	Thellier-Thellier method	ru_RU
dc.subject	Bayesian statistics	ru_RU
dc.subject	geomagnetic field	ru_RU
dc.subject	palaeosecular variation	ru_RU
dc.subject	magnetic property analyses	ru_RU
dc.title	Archaeomagnetic investigations in Bolgar (Tatarstan)	ru_RU
dc.type	Articles in international journals and collections	ru_RU