Results 11 to 20 of about 244 (74)

Cooling Rate Correction in Paleointensity Experiments on Archeological and Geological Materials

Geochemistry, Geophysics, Geosystems
Obtaining accurate estimates of the absolute intensity of the past geomagnetic field (paleointensity) is one of the major challenges in paleomagnetic research.
Ron Shaar
doaj   +2 more sources

Archaeomagnetism in the Levant and Mesopotamia Reveals the Largest Changes in the Geomagnetic Field. [PDF]

J Geophys Res Solid Earth, 2022
Abstract Our understanding of geomagnetic field intensity prior to the era of direct instrumental measurements relies on paleointensity analysis of rocks and archaeological materials that serve as magnetic recorders. Only in rare cases are absolute paleointensity data sets continuous over millennial timescales, in sub‐centennial resolution, and ...
Shaar R, Gallet Y, Vaknin Y, Gonen L, Martin MAS, Adams MJ, Finkelstein I.   +6 more
europepmc   +2 more sources

ArchKalmag14k: A Kalman‐Filter Based Global Geomagnetic Model for the Holocene

Journal of Geophysical Research: Solid Earth, Volume 127, Issue 2, February 2022., 2022
Abstract We propose a global geomagnetic field model for the last 14 thousand years, based on thermoremanent records. We call the model ArchKalmag14k. ArchKalmag14k is constructed by modifying recently proposed algorithms, based on space‐time correlations. Due to the amount of data and complexity of the model, the full Bayesian posterior is numerically
M. Schanner, M. Korte, M. Holschneider
wiley   +1 more source

ThellierCoolPy: A Cooling‐Rate Correction Tool for Paleointensity Data

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 12, December 2021., 2021
Abstract We report a new approach of implementing cooling‐rate corrections in absolute ancient magnetic field intensity (paleointensity) studies. Nearly all methods of determining paleointensity estimates rely on rocks having recorded a thermoremanent magnetization (TRM), on cooling from above the rock’s constituent minerals’ Curie temperature ...
Adrian R. Muxworthy, Evelyn B. Baker
wiley   +1 more source

First Full Vector Archeomagnetic Data From Northern Mexico

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 10, October 2021., 2021
Abstract Several regional secular variation curves of the geomagnetic field have been proposed for Mexico over the last millennia. Despite a fairly large number of archeomagnetic data, these curves remain imprecise because of an uneven quality and geographic distribution, with a lack of data in Northern Mexico.
B. Tchibinda Madingou, M. Perrin, G. Hervé, A. Hernàndez Cardona, L. M. Alva‐Valdivia, R. Cruz Antillón   +5 more
wiley   +1 more source

Further Evidence of High Intensity During the Levantine Iron Age Anomaly in Southwestern Europe: Full Vector Archeomagnetic Dating of an Early Iron Age Dwelling From Western Spain

Journal of Geophysical Research: Solid Earth, Volume 126, Issue 9, September 2021., 2021
Abstract We report an archeomagnetic study from the Early Iron Age archeological site of Cerro de San Vicente (Salamanca, Spain). The studied materials were sampled from one roundhouse and its central fireplace, a surrounding burnt floor, and slags with a twofold objective.
N. García‐Redondo, M. Calvo‐Rathert, Á. Carrancho, A. Goguitchaichvili, E. Iriarte, A. Blanco‐González, M. J. Dekkers, J. Morales‐Contreras, C. Alario‐García, C. Macarro‐Alcalde   +9 more
wiley   +1 more source

Correlation Based Time Evolution of the Archeomagnetic Field

Journal of Geophysical Research: Solid Earth, Volume 126, Issue 7, July 2021., 2021
Abstract In a previous study, a new snapshot modeling concept for the archeomagnetic field was introduced (Mauerberger et al., 2020, https://doi.org/10.1093/gji/ggaa336). By assuming a Gaussian process for the geomagnetic potential, a correlation‐based algorithm was presented, which incorporates a closed‐form spatial correlation function.
M. Schanner, S. Mauerberger, M. Korte, M. Holschneider   +3 more
wiley   +1 more source

Decadal Geomagnetic Secular Variations From Greigite Bearing Dead Sea Sediments

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 4, April 2021., 2021
Abstract Archeomagnetic data from the Levant revealed periods within the Holocene with fast and extreme changes in the geomagnetic field. Yet, the availability of the archeomagnetic data is sporadic and the correlation with the available sedimentary records from the region is rather poor.
Yael Ebert, Ron Shaar, Mordechai Stein
wiley   +1 more source

Bulk magnetic domain stability controls paleointensity fidelity [PDF]

, 2017
Nonideal, nonsingle-domain magnetic grains are ubiquitous in rocks; however, they can have a detrimental impact on the fidelity of paleomagnetic records—in particular the determination of ancient magnetic field strength (paleointensity), a key means of ...
Muxworthy, Adrian R, Pan, Yongxin, Paterson, Greig A, Yamamoto, Yuhji   +3 more
core   +1 more source

Intensity of the geomagnetic field in Europe for the last 3 ka: Influence of data quality on geomagnetic field modeling

Geochemistry, Geophysics, Geosystems, 2014
One of the main challenges of paleomagnetic research is to obtain high‐resolution geomagnetic field intensity reconstructions. For the last millennia, these reconstructions are mostly based on archeomagnetic data.
Francisco Javier Pavón‐Carrasco, Miriam Gómez‐Paccard, Gwenaël Hervé, María Luisa Osete, Annick Chauvin   +4 more
doaj   +1 more source