Results 91 to 100 of about 3,470 (247)
Paleomagnetic studies on single crystals separated from the middle Cretaceous Iritono granite
Earth, Planets and Space, 2018 Investigations of superchrons are the key to understanding long-term changes of the geodynamo and the mantle’s controlling role. Granitic rocks could be good recorders of deep-time geomagnetic field behavior, but paleomagnetic measurements on whole-rock ...
Chie Kato +4 more
doaj +1 more source
Paleointensity Determinations with Measurements at High Temperature.
Journal of geomagnetism and geoelectricity, 1995 Paleointensity determinations following the principle of the Konigsberger Thellier Thellier (KTT) method, but with measurement at high temperatures have been carried out. The high temperature measurements were made with a continuous thermal demagnetization system, which operates as a modification of a 2G horizontal access cryogenic magnetometer.
Tanaka, Hidefumi +3 more
openaire +2 more sources
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.Abstract Marine sediments contain magnetic mineral particles of detrital, biogenic and authigenic origin that record changes in the direction and intensity of the geomagnetic field over geological time. Previous studies have demonstrated that the recording efficiencies of detrital and biogenic magnetite differ.
Kuang He +8 more
wiley +1 more source
Paleointensity of sediment core PS1882-2
, 1997 Paleointensity of sediment core PS1882-
Norbert R Nowaczyk (6959615) +1 more
core +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.Abstract The study of variations in geomagnetic field intensity over time and space is crucial to understand the evolution of the geodynamo and its interactions with the Earth's surface. In this work, we introduce the SAGEOMAG (South America GEOMAGnetic) database, a comprehensive and updated repository of geomagnetic field intensity records derived ...
Victor J. O. Marum +6 more
wiley +1 more source
Paleointensity of sediment core PS2180-2
, 2001 Paleointensity of sediment core PS2180-
Stein, Ruediger +13 more
core +1 more source
Paleointensity Determination Using the Thellier Technique
Journal of geomagnetism and geoelectricity, 1986 The Thellier technique is discussed, specifically in respect of small (3×3mm) samples measured using a cryogenic magnetometer. It is concluded that as long as stringent criteria are imposed the technique gives reliable results. Agreement with the Shaw technique is noted, as also with observatory-based values.
M. J. AITKEN +3 more
openaire +3 more sources
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.Abstract Micropaleomagnetic analysis offers a path to high‐precision reconstructions of ancient magnetic fields from terrestrial and space‐returned samples by inverting the vertical stray field of individual particles to recover their magnetic moments through the use of magnetic microscopes.
U. D. Bellon +9 more
wiley +1 more source
Selection of Basalts for Paleointensity Studies
Journal of geomagnetism and geoelectricity, 1986 The selection of basalt samples for the determination of paleointensity, proposed by SENANAYAKE et al. (1982) based mainly on the low-temperature susceptibility variation, may not be adequate for the purpose. Besides the Type 2 basalts in their classification, the magnetic mineral Fe2.9Ti0.1O4 (TM10), which occurs commonly in basalts, also shows an ...
openaire +2 more sources
Alteration of the coercivity spectrum and paleointensity determination
Geophysical Research Letters, 1987 A restudy of 13 bricks from a 19th‐century kiln, using the Shaw AF‐demagnetization method of paleointensity determination, revealed alteration of the magnetite carrying natural remanent magnetization (NRM) during heating to the Curie point. Anhysteretic remanences before heating (ARM1) and after heating (ARM2) had similar intensities, but the ARM2 ...
David J. Dunlop +2 more
openaire +1 more source