Results 81 to 90 of about 4,431,213 (212)

New Permian Paleomagnetic and Geochronologic Results From the Alxa Block: Constraints on Its Tectonic Affinity and the Closure of Paleo‐Asian Ocean

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract The Paleo‐Asian Ocean's (PAO) closure timing and the Alxa Block's (ALB) tectonic affinity remain debated. We present new paleomagnetic and geochronologic data from Permian volcanic and sedimentary rocks in the ALB. Characteristic remanent magnetization (ChRM) directions from Early (∼282 Ma), Middle (∼268 Ma), and Late Permian (∼255 Ma) rocks ...
Wei Xu, Bo Song, Jizhong Shi, Yan Li, Baowen Wang, Xiaozhou Ye, Xiaofeng Han, Haihong Xu, Yunpeng Zhang, Huiyuan Zhang, Zhiming Sun   +10 more
wiley   +1 more source

First Paleomagnetic Results From Late Triassic Volcanic Rocks of the Yidun Terrane, Eastern Tibetan Plateau: Constraints on the Closure of the Paleo‐Tethys Ocean

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract To constrain the temporal and spatial evolution of the Ganzi‐Litang Paleo‐Tethys Ocean, this study presents the first paleomagnetic results from Late Triassic volcanic rocks in the Yidun terrane in the eastern Tibetan Plateau. The mean paleomagnetic direction for 27 sites is Ds = 39.2°, Is = −52.9°, κs = 42.2, α95 = 4.3°, and the paleomagnetic
Yong Cao, Zhiming Sun, Haibing Li, Xinwen Cao, Xiaozhou Ye, Yuhan Yang, Lei Zhang, Yang Gao   +7 more
wiley   +1 more source

Cooling Rate Correction in Paleointensity Experiments on Archeological and Geological Materials

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Obtaining accurate estimates of the absolute intensity of the past geomagnetic field (paleointensity) is one of the major challenges in paleomagnetic research. Paleointensity data are typically determined by replacing the ancient thermoremanent magnetization (TRM) acquired in an unknown field with a laboratory TRM acquired under controlled ...
Ron Shaar
wiley   +1 more source

Paleomagnetic constraint of the age and duration of the Taupō Eruption, New Zealand

Earth, Planets and Space, 2023
We have carried out paleomagnetic analyses of tephras from the Taupō eruption, one of the most violent eruptions on Earth in the past 5000 years. Pyroclastic deposits were collected with 7 cm3 cubes pushed into each unit of the Taupō eruption sequence ...
Takeshi Hasegawa, Annika Greve, Darren M. Gravley, Chie Kusu, Yasuaki Kaneda, Shohei Shibata, Makoto Okada, Szabolcs Kósik, Nobutatsu Mochizuki, Gillian Turner   +9 more
doaj   +1 more source

Paleomagnetism of a lateritic paleoweathering horizon and overlying Paleoproterozoic red beds from South Africa: Implications for the Kaapvaal apparent polar wander path and a confirmation of atmospheric oxygen enrichment [PDF]

, 2002
The Olifantshoek Group in southern Africa contains Paleoproterozoic red beds that are exceptionally well preserved, lying unconformably atop a regionally extensive lateritic paleoweathering profile.
Beukes, N. J., Evans, D. A. D., Kirschvink, J. L.   +2 more
core   +1 more source

Geomagnetic Dipole Strength During the Cretaceous Normal Superchron Recorded by Baked Sediments From Hainan (SE Asia)

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The Cretaceous Normal Superchron constitutes an enigmatic ∼37‐Myr interval of stable polarity in the history of the Earth's magnetic field. The strength of the geomagnetic dipole moment during this interval is controversial, with absolute paleointensity determinations on crystallized volcanic rocks, volcanic glasses, and silicate crystals ...
Yuchen Chi, Florian Lhuillier, Jun Meng, Chunyang Zhang, Valeriy P. Shcherbakov   +4 more
wiley   +1 more source

Paleomagnetism and Aeromagnetic Survey From Tancitaro Volcano (Central Mexico) - Paleo-Secular Variation at Low Latitudes During the Past 1 Ma

Geofísica Internacional, 2017
El volcán Tancítaro (TV) forma parte del campo volcánico monogenético Michoacán- Guanajuato (MGVF) en el sector centro-oeste del Eje Volcánico Trans Mexicano (TMVB).
Rafael García-Ruiz, Avto Goguitchaichvili, Hector López Loera, Miguel Cervantes-Solano, Juan Morales-Contreras, Rafael Maciel-Peña, José Rosas-Elguera   +6 more
doaj   +1 more source

An updated catalogue of pre-Hispanic archaeomagnetic data for north and central Mesoamerica: Implications for the regional paleosecular variation reference curve

Boletín de la Sociedad Geológica Mexicana, 2019
espanolAunque el patrimonio cultural de Mesoamerica es cuantioso, aun no se cuenta con una curva de variacion secular del campo geomagnetico mediante datos arqueomagneticos para el centro de Mexico y areas adyacentes.
A. Soler-Arechalde, C. Caballero-Miranda, J. Urrutia‐Fucugauchi, María Luisa Osete-López, Verónica López-Delgado, A. Goguitchaichvili, Alan Barrera-Huerta   +6 more
semanticscholar   +1 more source

Early Jurassic magnetostratigraphy and paleolatitudes from the Hartford continental rift basin (eastern North America) . . . [PDF]

, 2008
To determine whether the ~200 Ma central Atlantic magmatic province (CAMP) coincides with a normal polarity bias and a purported abrupt change in polar wander at the J1 cusp, we collected samples for paleomagnetic study from 80 sites distributed over a ...
Kent, Dennis V., Olsen, Paul E.
core   +2 more sources

Late Mesoproterozoic Rapid True Polar Wander Recorded in the Jingeryu Formation, North China Craton

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Disentangling short‐duration (≤10 Ma) true polar wander (TPW) events in the Precambrian presents a significant challenge, necessitating the acquisition of high‐resolution and ‐quality paleomagnetic data and well‐determined age relations. This study reports new paleomagnetic results from carbonate sequences of the Jingeryu Formation in the ...
Hanqing Zhao, Shihong Zhang, Jikai Ding, Qiang Ren, Jianping Qu, Kunkun Yang, Haiyan Li, Tianshui Yang, Huaichun Wu   +8 more
wiley   +1 more source