Results 71 to 80 of about 4,304 (252)

Northeastern Greenland Paleomagnetic Records Indicate the Influence of Geomagnetic Flux Lobe Intensity on Virtual Geomagnetic Pole Migration During the Holocene

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Paleomagnetic and rock magnetic analyses were conducted on sediment cores from the northeastern Greenland Shelf and Young Sound along the western edge of Fram Strait. The paleomagnetic signal in all three sediment cores is characterized by a strong and stable single component magnetization carried by low coercivity ferrimagnetic single domain ...
Juliette Girard, Guillaume St‐Onge, Christof Pearce, France Lagroix, Marit‐Solveig Seidenkrantz, Katrine Juul Andresen, Jean‐Carlos Montero‐Serrano, Pierre Francus   +7 more
wiley   +1 more source

The Culprit of Bias for Paleointensity Estimation in the Shaw‐Type Protocol and an Innovative Calculation Method

Geophysical Research Letters
Paleointensity records are vital for understanding the Earth's evolution, but obtaining accurate paleointensity is a challenging task. The Shaw‐type method, a widely‐used paleointensity protocol, produces biased results occasionally despite strict ...
Kaixian Qi, Shuhui Cai, Huafeng Qin, Yuhji Yamamoto, Chenglong Deng, Yongxin Pan, Xin Cheng, Hanning Wu, Rixiang Zhu   +8 more
doaj   +1 more source

Paleointensity of the earth's magnetic field during the Laschamp excursion and its geomagnetic implications [PDF]

, 1988
L'étude des données paléomagnétiques des coulées de Laschamp et d'Olby met en évidence que les directions paléomagnétiques enrégistrées ne sont pas liées à une inversion stable de la polarité mais plutôt à une "tentative" d'inversion ou à une inversion ...
Bonhommet, N., Lévi, S., Roperch, Pierrick   +2 more
core   +1 more source

A geomagnetic estimate of mean paleointensity [PDF]

Journal of Geophysical Research: Solid Earth, 2006
A statistical hypothesis about Earth's magnetic field is tested against paleomagnetism by combining it with the present field to estimate mean paleointensity. The estimate uses the satellite era geomagnetic multipole power spectrum Rn, which gives the mean square magnetic induction represented by spherical harmonics of degree n averaged over the sphere
openaire   +1 more source

High Geomagnetic Reversal Frequency During the Middle to Late Ediacaran (∼570 Ma) Constrained by Integrated Magneto‐ and Cyclostratigraphy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso, R. M. Rocha, D. R. Franco, N. B. Dos Santos, C. G. Leandro, P. Franceschinis, A. E. Rapalini, M. J. Arrouy, L. E. Gómez‐Peral, D. G. Poiré, S. Caetano‐Filho, H. D. Brito, R. I. F. Trindade   +12 more
wiley   +1 more source

Influence of Seasonal Post‐Depositional Processes on the Remanent Magnetization in Varved Sediments From Glacial Lake Ojibway (Canada)

Geochemistry, Geophysics, Geosystems, 2023
The natural remanent magnetization (NRM) of high sedimentation rate sediments provides significant information about paleomagnetic secular variation of the Earth's magnetic field and can also potentially be used for stratigraphy. However, NRM acquisition
Édouard G. H. Philippe, Guillaume St‐Onge, Jean‐Pierre Valet, Pierre‐Marc Godbout, Ramon Egli, Pierre Francus, Martin Roy   +6 more
doaj   +1 more source

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, Benjamin P. Weiss, Bowles, Brecher, Brett, Burkhard, Cacciamani, Chowdhary, Clément Suavet, Coe, Collinson, Collinson, Cournède, Day, Dunlop, Dunn, Eugster, Fuller, Fuller, Garrick-Bethell, Garrick-Bethell, Gattacceca, Goodrich, Gose, Grove, Halgedahl, Hewins, Hoffman, Huebner, Kirschvink, Kletetschka, Larson, Lawrence, Levi, Morden, Nafziger, Nagata, Néel, Pearce, Prunier, Righter, Sato, Shaar, Shea, Suavet, Sugiura, Sugiura, Sugiura, Tauxe, Tauxe, Taylor, Taylor, Thellier, Tikoo, Timothy L. Grove, Ulmer, Wadhwa, Wang, Weiss, Westphal, Westphal, Yu, Yu, Yu, Zen   +64 more
core   +1 more source

Paleointensity of the ancient Martian magnetic field [PDF]

Geophysical Research Letters, 2008
Mars today has no core dynamo magnetic field. However, the discovery of remanent magnetization in Martian meteorites and intense crustal magnetization suggests that Mars once had a global field. Here we present high resolution maps of the magnetic field of Martian meteorite ALH 84001.
Benjamin P. Weiss, Luis E. Fong, Hojatollah Vali, Eduardo A. Lima, Franz J. Baudenbacher   +4 more
openaire   +1 more source

Testing the Accuracy of Paleointensity Estimates Using Experimental Pottery Assemblages

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Paleointensity estimates from archaeological pottery represent a key source of information on Holocene variations in geomagnetic field intensity. Yet, pottery rarely exhibits ideal single‐domain behavior that fully satisfies the theoretical assumptions underlying absolute paleointensity methods.
Lior Bar‐Sovik, Ron Shaar, Agnès Genevey, Yves Gallet, Yoav Vaknin, Yuval Goren   +5 more
wiley   +1 more source

Age constraints on island-arc submarine basalts from geomagnetic paleointensity

Earth, Planets and Space
High-resolution dating of volcanic rocks is the foundation for understanding the evolution of volcanoes and for estimating possible hazards. However, dating is often difficult for submarine volcanoes, where radiocarbon or other dating is frequently ...
Yoichi Usui, Iona McIntosh, Osamu Ishizuka   +2 more
doaj   +1 more source