SCHA.DIF.4k: 4,000 Years of Paleomagnetic Reconstruction for Europe and Its Application for Dating

Abstract

During the last decade, many efforts have been carried out to improve the paleomagnetic database for the Holocene and late Pleistocene epochs. The increase of paleomagnetic data has enabled to have a better knowledge of the spatial and temporal variations of the ancient Earth's magnetic field over the last 100 kyr (Panovska et al., 2019). For the last millennia, the most accurate paleomagnetic information comes from studies performed in archaeological structures and lava flows, since they have recorded snapshots of the past geomagnetic field owing to a thermoremanent magnetization (TRM). These kind of data, named in this work as TRM data, are used to reconstruct the past field (or paleofield) at different spatial scales: from local by determining paleosecular variation (PSV) curves (

Refining geomagnetic field intensity changes in Europe between 200 CE and 1800 CE. New data from the Mediterranean region

“…It has been largely recognized that some of the older studies contain some archeointensities that might not be accurate markers of past geomagnetic field strength (e. g., Chauvin et al, 2000;Genevey et al, 2008). Here and following our previous studies (Gómez-Paccard et al, 2012;Campuzano et al, 2019;Pavón-Carrasco et al, 2021) we selected data following different quality criteria based on the type of material analyzed, the number of specimens retained to calculate the mean values and the laboratory protocol followed to obtain the archeointensities. We selected data obtained from three or more specimens and derived from Thellier type methods including partial pTRM checks.…”

A First‐Order Statistical Exploration of the Mathematical Limits of Micromagnetic Tomography

“…Volcanic rocks acquire a thermoremanent magnetization when they cool in the Earth's magnetic field that is proportional to the direction and strength of the magnetic field at the time of cooling. TRMs of natural rocks are often regarded to be the most reliable data source for geomagnetic field models because of their ability to store information on the paleomagnetic field for thousands to millions of years (e.g., Panovska et al., 2019; Pavón‐Carrasco et al., 2021). Full vector ChRMs consist of both directional and intensity information on the past geomagnetic field, but they can generally only be obtained for 10%–20% of volcanic samples carrying TRMs (e.g., Nagy et al., 2017; Tauxe & Yamazaki, 2015).…”

Archeomagnetic intensity investigations of French medieval ceramic workshops: Contribution to regional field modeling and archeointensity-based dating

“…This tool is based on the use of local reference curves of the temporal variations of the geomagnetic field in direction and/or intensity, either directly obtained from the analysis of numerous dated structures in the region of interest, or, when not available, deduced from regional or even global time-dependent geomagnetic field models. In Europe, one may rely on the regional SCHA-DIF.4K field model covering the past four millennia recently constructed by Pavón-Carrasco et al (2021), which updates and extends the previous SCHA-DIF.3K model (Pavón-Carrasco et al 2009). The following studies indicate the breadth of existing research and interests in a variety of European countries: Belgium, Ech-Chakrouni et al (2013); Bulgaria, Herries et al (2008); England, Batt et al (2017); France, Gallet et al (2009) and Hervé and Lanos (2017); Austria, Schnepp et al (2015); Greece, Aidona et al (2017); Italy, Tema et al (2014) and Principe et al (2018); Spain, Gómez-Paccard and Beamud (2008) and Catanzariti et al (2007).…”