Results 71 to 80 of about 519 (182)

Evolution of the Earth's magnetic field strength in northwestern Argentina during the last two millennia: Towards the improvement of south American geomagnetic paleosecular variation curve

, 2023
A magnetic mineralogy and absolute geomagnetic intensity study was carried out on prehispanic ceramic fragments from the Southern Andes region (Northwest Argentina). Magnetic susceptibility vs.
García Ruíz, Rafael, Berkovich, Cesar, Rafael García-Ruiz, Kravchinsky, Vadim, Pérez Rodríguez, Nayeli, Nayeli Pérez Rodríguez, Cesar Berkovich, Catriel Greco, Morales, Juan, Vadim Kravchinsky, Goguitchaichvili, Avto, Greco Mainero, Mariano Catriel, Avto Goguitchaichvili, Juan Morales   +13 more
core   +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

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

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

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

A Lake Record of Geomagnetic Secular Variations for the Last 23 ka From Lake Chala: Toward a Composite Directional Lake Record of the Earth's Magnetic Field for Equatorial East Africa

Geochemistry, Geophysics, Geosystems
The documentation and understanding of variations in the Earth's magnetic field through time is fundamental for several disciplines, but current geomagnetic models rely on datasets heavily biased toward the mid‐ and high northern latitudes.
A. Di Chiara, M. W. Hounslow, B. A. Maher, V. Karloukovski, M. Van Daele, M. Blaauw, D. Verschuren   +6 more
doaj   +1 more source

Paleomagnetic and rock-magnetic survey of Brunhes lava flows from Tancitaro volcano, Mexico [PDF]

Geofísica Internacional, 2009
This study presents paleomagnetic results from Tancitaro volcanism in the Michoacan Guanajuato Volcanic Field, western Mexico, as a contribution to the time averaged field global database. Detailed paleomagnetic and rock-magnetic studies were carried out
C. Caballero Miranda, J. Urrutia Fucugauchi, L. Alva Valdivia, J. Morales, B. Aguilar Reyes, V. C. Ruíz Martínez, V. H. Garduño Monroy, A. Goguitchaichvili, R. Maciel Peña, A. Goguitchaichvili, V. H. Garduño Monroy, V. C. Ruiz Martinez, B. Aguilar, Reyes, J. Morales L. Alva-Valdivia, C. Caballero Miranda and J. Urrutia-Fucugauchi   +8 more
doaj  

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