English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
 Local TagsRelease HistoryDetailsSummary
  First full-vector archaeomagnetic data from Central Asia for the Last 2k Years: evidences for a possible non-dipolar feature

Bonilla Alba, R., Gómez-Paccard, M., Pavón-Carrasco, F. J., Beamud, E., A. Campuzano, S., Martínez-Ferreras, V., Gurt-Esparraguera, J. M., Ariño-Gil, E., Martín-Hernández, F., Osete, M. L. (2023): First full-vector archaeomagnetic data from Central Asia for the Last 2k Years: evidences for a possible non-dipolar feature, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4308

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021743 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021743_1
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Bonilla Alba, Raquel1, Author
Gómez-Paccard, Miriam1, Author
Pavón-Carrasco, F. Javier1, Author
Beamud, Elisabet1, Author
A. Campuzano, Saioa1, Author
Martínez-Ferreras, Veronica1, Author
Gurt-Esparraguera, Josep Maria1, Author
Ariño-Gil, Enrique1, Author
Martín-Hernández, Fátima1, Author
Osete, Maria Luisa1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: To understand the global geomagnetic field behaviour is necessary to describe its changes at regional scales. For this reason, one of the most important challenges of the archaeomagnetic research is to improve the spatial and temporal coverage of directional and intensity archaeomagnetic data. In this context, we present here the first full-vector archaeomagnetic data from Central Asia derived from the study of 9 archaeological kilns sampled in South Uzbekistan, with ages ranging between 200 BCE and 1400 CE. Thermal and AF demagnetizations and Thellier-Thellier experiments were performed to obtain the full-vector data. Paleointensity experiments include pTRM checks, TRM anisotropy and cooling rate corrections. The comparison between the new data and global geomagnetic field models shows an important deviation from predictions between 200 BCE and 200 CE, especially for the geomagnetic field intensity element. This geomagnetic feature is analysed to determinate its dipolar or non-dipolar character. Both the pole position and virtual axial dipole moment estimations derived from our new data and from the SHAWQ2k model show important discrepancies for the interval 200 BCE – 200 CE, suggesting a non-dipolar origin for the studied feature. Finally, the analysis of the radial magnetic field at the core-mantle boundary and the non-dipolar intensity at the Earth´s surface shows a reversal flux patch for this time window, explaining the low intensities observed in Central Asia for these ages.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4308
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -