Results 51 to 60 of about 181 (155)

Bending the Sierra Madre Oriental: A Paleocene Orocline

Tectonics, Volume 44, Issue 11, November 2025.
Abstract The Sierra Madre Oriental belt of the Mexican thin‐skinned fold‐and‐thrust belt, which formed during the Late Cretaceous due to the subduction of the Farallon Plate beneath North America, exhibits a pronounced curvature of approximately 100°, concave to the southwest.
Rafael Guerra Roel, Gabriel Chávez‐Cabello, José Jorge Aranda Gómez, Mark J. Dekkers, Gerardo Patiño Méndez, Daniel Pastor‐Galán   +5 more
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

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

Paleomagnetic Pole Positions and Geomagnetic Secular Variation from the Cretaceous Ponta Grossa Dike Swarm (Brazil)

Geofísica Internacional, 2015
A detailed paleomagnetic and rock magnetic investigation has been carried out on the Early Cretaceous Ponta Grossa dike swarm in southern Brazil. This formation seems an excellent target for paleomagnetic study.
Miguel Cervantes Solano, Avto Goguitchaichvili, Mabel Mena, Luis Alva-Valdivia, Juan Morales Contreras, Ruben Cejudo Ruiz, Héctor López–Loera, Ana María Sole, Jaime Urrutia-Fucugauchi   +8 more
doaj   +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

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

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

Pliocene–Pleistocene Paleomagnetic Secular Variation and Time‐Averaged Field From the Northern Volcanic Zone of the Andes, Colombia

Earth and Space Science
Paleomagnetic results obtained from 38 Pliocene—Pleistocene volcanic flows from the Knot of the Pastos and surroundings of Puracé volcano and Popayán (southwestern Colombia) are presented.
A. Sánchez‐Duque, V. Mejia, M. P. Torres, A. Pinilla   +3 more
doaj   +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

Improving the reconstruction of Holocene geomagnetic paleosecular variation in the Antarctic region

Physics of the Earth and Planetary Interiors
We present new paleomagnetic data from the ANTA02-AV43 core collected in the Ross Sea (Antarctica), spanning the last 10 ka. Results document a relative paleointensity (RPI) record that closely matches predictions from global geomagnetic models and from previously published records from nearby peri-Antarctic margins, including the Ross Sea and Wilkes ...
Leonardo Sagnotti, Chiara Caricchi, Patrizia Macrì, Ester Colizza, Paola Del Carlo, Alessio Di Roberto, Aldo Winkler   +6 more
openaire   +2 more sources