Results 31 to 40 of about 231 (169)
Holocene Paleointensity of the Island of Hawai `i From Glassy Volcanics
Geochemistry, Geophysics, Geosystems, 2018 This study presents new high‐quality paleointensity records and 14C radiocarbon age determinations from the Island of Hawai `i during the Holocene. Previous studies on Hawai `i use experimental methods and statistical selection criteria that may produce ...
G. Cromwell +4 more
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Relative paleointensity stack during the last 250 kyr in the northwest Pacific [PDF]
Journal of Geophysical Research: Solid Earth, 2007 We have conducted a paleomagnetic study of 10 sediment cores recovered from the northwest Pacific. The purpose is to establish a regional paleointensity stack during the last 250 kyrs (NOPAPIS‐250) for global coverage of paleointensity data as well as a regional reference for paleointensity‐assisted stratigraphy.
Y. Yamamoto +4 more
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Progress in Earth and Planetary Science, 2020 We present a novel paleomagnetic record for the lower Matuyama chronozone, which includes the Réunion subchronozone and the lower Olduvai polarity reversal, from a continuous section of a 168-m-thick on-land marine succession in the southernmost part of ...
Takumi Konishi, Makoto Okada
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Relative paleointensity (RPI) and age control in Quaternary sediment drifts off the Antarctic Peninsula [PDF]
Quaternary Science Reviews, 2019 Lack of foraminiferal carbonate in marine sediments deposited at high latitudes results in traditional oxygen isotope stratigraphy not playing a central role in Quaternary age control for a large portion of the globe. This limitation has affected the interpretation of Quaternary sediment drifts off the Antarctic Peninsula in a region critical for ...
Channell, James +4 more
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A Physical Interpretation of Asymmetric Growth and Decay of the Geomagnetic Dipole Moment
Geochemistry, Geophysics, Geosystems, 2022 Observations of relative paleointensity reveal several forms of asymmetry in the time dependence of the virtual axial dipole moment (VADM). Slow decline of the VADM into a reversal is often followed by a more rapid rise back to a quasi‐steady state ...
B. A. Buffett, M. S. Avery, W. Davis
doaj +1 more source
Oriented Magnetite Inclusions in Plagioclase: Implications for the Anisotropy of Magnetic Remanence
Geochemistry, Geophysics, Geosystems, 2022 Micron to sub‐micron sized ferromagnetic inclusions in rock forming silicate minerals may give rise to particularly stable remanent magnetizations. When a population of inclusions have a preferred crystallographic or shape orientation in a rock, the ...
O. Ageeva +7 more
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On the use of calibrated relative paleointensity records to improve millennial‐scale geomagnetic field models [PDF]
Geochemistry, Geophysics, Geosystems, 2006 Current millennial‐scale time‐varying global geomagnetic field models suffer from a lack of intensity data compared to directional data, because only thermoremanently magnetized material can provide absolute information about the past field strength. The number of archeomagnetic artifacts that can provide such data diminishes rapidly prior to 3000 B.C.
Korte, M., Constable, C.
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Geochemistry, Geophysics, Geosystems, 2021 This work presents an extensive directional paleomagnetic database of the Kiaman reversed superchron. It is composed of 1,459 paleomagnetic directions from igneous rocks corresponding to 91 data sets (or paleomagnetic poles).
Daniele Brandt +2 more
doaj +1 more source
Paleomagnetic Recording Efficiency of Sedimentary Magnetic Mineral Inclusions: Implications for Relative Paleointensity Determinations [PDF]
Journal of Geophysical Research: Solid Earth, 2019 AbstractSedimentary relative paleointensity (RPI) records are often carried by complex magnetic mineral mixtures, including detrital and biogenic magnetic minerals. Recent studies have demonstrated that magnetic inclusions within larger detrital silicate particles can make significant contributions to sedimentary paleomagnetic records.
Hoabin Hong +7 more
openaire +4 more sources
Frontiers in Earth Science, 2021 Loess-paleosol sequences (LPSs) are important terrestrial archives of paleoenvironmental and paleoclimatic information. One of the main obstacles for the investigation and interpretation of these archives is the uncertainty of their age-depth ...
Stephanie Scheidt +19 more
doaj +1 more source