Results 11 to 20 of about 108 (93)
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 +5 more
wiley +1 more source
Magnetomineralogy of Archeomagnetic Materials.
Journal of geomagnetism and geoelectricity, 1996 A survey of the main magnetomineralogical characteristics of 92 archeomagnetic samples from 37 sites in Greece, Italy, North Africa, and China is presented. Coercive force spectra suggest that magnetite and/or titano-magnetite dominates both natural and laboratory remanences (NRM, ARM and IRM).
Evans, M. E., Jiang, L.
openaire +2 more sources
The time-dependence of intense archeomagnetic flux patches [PDF]
Journal of Geophysical Research, 2011 [1] The long‐term temporal behavior of intense geomagnetic flux patches at the core‐mantle boundary and the relation with lower mantle lateral heterogeneity are under debate. We apply an algorithm to detect centers of intense flux patches and track their time‐evolution in a recent archeomagnetic field model in order to study the kinematics of such ...
Amit, Hagay +4 more
openaire +4 more sources
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 +4 more
doaj +1 more source
A regional archeomagnetic model for Europe for the last 3000 years, SCHA.DIF.3K: Applications to archeomagnetic dating [PDF]
Geochemistry, Geophysics, Geosystems, 2009 The available European database of archeomagnetic field values and instrumental data has been used to produce a regional model for the geomagnetic field in Europe for the last 3000 years (from 1000 B.C. to 1900 A.D., connecting with the epoch covered by the IGRF models).
Pavón-Carrasco, F. Javier +3 more
openaire +2 more sources
Correlation based snapshot models of the archeomagnetic field [PDF]
Geophysical Journal International, 2020 SUMMARY For the time stationary global geomagnetic field, a new modelling concept is presented. A Bayesian non-parametric approach provides realistic location dependent uncertainty estimates. Modelling related variabilities are dealt with systematically by making little subjective a priori assumptions. Rather than parametrizing the model
S Mauerberger +3 more
openaire +3 more sources
Archeomagnetic dating in western North America: An updated reference curve based on paleomagnetic and archeomagnetic data sets [PDF]
Geochemistry, Geophysics, Geosystems, 2010 A robust database of paleomagnetic (PM) and archeomagnetic (AM) data for western North America covering the past 4 millennia is assembled from three data sets: (1) published PM data for dated lava flows, (2) recently published AM data generated by R. L. DuBois, and (3) published AM data generated by J. L. Eighmy. Chronologic information for the AM data
Jonathan T. Hagstrum, Eric Blinman
openaire +1 more source
Archeomagnetic intensity variations during the era of geomagnetic spikes in the Levant [PDF]
Physics of the Earth and Planetary Interiors, 2021 Observational records of rapidly varying magnetic fields strongly constrain our understanding of core flow dynamics and Earth's dynamo. Archeomagnetic analyses of densely sampled artefacts from the Near-East have suggested that the intensity variation during the first millennium BCE was punctuated with two geomagnetic spikes with rates of change of ...
Livermore, Philip +2 more
openaire +3 more sources
Geochemistry, Geophysics, Geosystems, 2018 In this work, we present 16 directional and 27 intensity high‐quality values from Iberia. Moreover, we have updated the Iberian archeomagnetic catalogue published more than 10 years ago with a considerable increase in the database.
A. Molina‐Cardín +19 more
doaj +1 more source