Results 31 to 40 of about 1,861 (213)
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
openaire +5 more sources
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
doaj +1 more source
The effects of aliasing and lock-in processes on palaeosecular variation records from sediments [PDF]
, 2000 Studies of sedimentary records of palaeointensity variation report periods as long as 50 kyr. Archaeointensity data show geomagnetic periods of 2 kyr with large ampli-tudes.
Gubbins, D., Teanby, N.
core +1 more source
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
openaire +1 more source
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
doaj +1 more source
, 2003 We report a survey carried out on basalt flows from Amsterdam Island in order to check the presence of intermediate directions interpreted to belong to a geomagnetic field excursion within the Brunhes epoch, completing this paleomagnetic record with ...
Bernard Henry +11 more
core +4 more sources
Cooling rate effects on paleointensity estimates in submarine basaltic glass and implications for dating young flows [PDF]
, 2005 Cooling rate effects on the intensity of thermoremanent magnetization (TRM) have been well documented in ceramics. In that case, laboratory cooling is generally more rapid than the initial cooling, leading to an overestimate of the paleofield by 5-10% in
Bergmanis, Eric +4 more
core +2 more sources
Controlled-atmosphere thermal demagnetization and paleointensity analyses of extraterrestrial rocks [PDF]
, 2013 We describe a system for conducting thermal demagnetization of extraterrestrial rocks in a controlled atmosphere appropriate for a wide range of oxygen fugacities within the stability domain of iron.
Aitken +64 more
core +1 more source
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
, 2019 Metallic microstructures in slowly-cooled iron-rich meteorites reflect the thermal and magnetic histories of their parent planetesimals. Of particular interest is the cloudy zone, a nanoscale intergrowth of Ni-rich islands within a Ni-poor matrix that ...
Bryson, James F. J. +2 more
core +3 more sources