Results 51 to 60 of about 4,906 (222)

Quaternions for rotations in paleomagnetism

Mathematical Geosciences, 2022
Abstract A variety of rotation operations are needed in paleomagnetism. These include transformations to the geographic coordinate system, tilt correction, finding virtual geomagnetic poles, and drawing demagnetization paths. Different methods have been used for each rotation operation - graphical manipulations on a stereonet, matrix ...
openaire   +1 more source

Automated Mineral Identification and Rock‐Type Classification of Lunar Mare Basalts Using SEM Images

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract We present an automated system for identifying minerals and classifying rock types in Apollo lunar mare basalts using scanning electron microscopy (SEM) imagery. Mineral segmentation is based on a U‐Net architecture, supplemented by two scale‐aware models designed to incorporate pixel size information.
Ji‐In Jung, Sonia M. Tikoo, Jaehong Chung, Claire I. O. Nichols   +3 more
wiley   +1 more source

On the reliability of drilling core reorientations using palaeomagnetic methods: A case study from the boreholes in the Tarim Basin

地质科技通报, 2023
Objective This study explores the accuracy of drilling core reorientations by using remanent magnetization. Methods To this end, paleomagnetic analyses were carried out on 43 Silurian sandstone samples collected from five boreholes (TKQ101, SHUN9, TAT19,
Weiwei Chen, Fengli Yang, Yuan Zhuang, Mingchen Xu, Yuyang Hu   +4 more
doaj   +1 more source

Paleomagnetism

Eos, Transactions American Geophysical Union, 1989
The Third Annual Northeast Paleomagnetic Workshop was held September 23 at the University of Massachusetts, Amherst; Laurie Brown of the university's geology department was the organizer. On September 22, Sue Halgedahl of Lamont Doherty Geological Observatory, Palisades, N.Y., gave a lecture on magnetic domain structure and its relationship to ...
openaire   +1 more source

Physics‐Informed Machine Learning Framework to Retroactively Estimate Mantle Thermal Convection From Partial Geophysical Observations

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract Mantle convection drives the solid Earth, powering plate motions, volcanism, and earthquakes while regulating planetary heat loss. Reconstructing its history is hampered by sparse, noisy observations concentrated near the surface and the present day. Here I develop an inverse physics‐informed neural network framework to estimate mantle thermal
Atsushi Nakao
wiley   +1 more source

Marine Magnetic Anomalies Enhanced by Internal Stress in Rapidly Cooled Submarine Basalts

Geophysical Research Letters
Marine magnetic anomalies are pivotal to our understanding of plate tectonics, geomagnetic fields, and deep Earth dynamics. However, the question of how Ti‐rich titanomagnetites, the primary remanence carriers in oceanic crust rocks, can faithfully ...
Fei Han, Huapei Wang, Yiliang Lv, Greig A. Paterson, Andrew J. Biggin, Wyn Williams, Tao Yang, Junxiang Miao, Ting Cao, Duowen Zhu, Chen Wen, Shaochen Hu, Xiaowei Chen, Mengqing Wang, Yiming Ma, Jiakun Fang, Jiabo Liu   +16 more
doaj   +1 more source

The Fine‐Scale Magnetic History of the Allende Meteorite: Implications for the Structure of the Solar Nebula

AGU Advances, 2021
Magnetic fields in the early solar system may have driven the inward accretion of the protoplanetary disk (PPD) and generated instabilities that led to the formation of planets and ring and gap structures.
Roger R. Fu, Michael W. R. Volk, Dario Bilardello, Guy Libourel, Geoffroy R. J. Lesur, Oren Ben Dor   +5 more
doaj   +1 more source

Dansgaard‐Oeschger Events Recorded in Low‐Latitude Marine Sediments and Teleconnection With High‐Latitude Climate Variations

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Dansgaard‐Oeschger (D‐O) events are millennial‐scale high‐latitude climate oscillations with abrupt climate transitions between stadial and interstadial conditions, which are well recorded in and outside of high northern latitudes. However, their signal propagation mechanisms from high to low latitudes are uncertain.
Zhanjie Liu, Zhaoxia Jiang, Long Chen, Andrew P. Roberts, Sanzhong Li, Liang Chen, Zhengxin Yin, Wanxin Liu, Yulong Guan, Yuzhen Zhang   +9 more
wiley   +1 more source

Synchronous Advance of the Alpine Glaciation Across the Northern and Southern Tibetan Plateau During the Mid‐Pleistocene Transition

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Chronological studies of glacial sediments from the Shishapangma and Yarlung Tsangpo River valley indicate that Quaternary glaciation on the southern Tibetan Plateau commenced at ∼0.75–0.83 Ma. However, the oldest glacial deposits in the northern plateau are dated to only ∼0.46 Ma, markedly later than the Middle Pleistocene glacial ...
Chengying Liu, Benhong Guo, Wenjiao Xiao, Zaijun Li, Linkai Wang, Fei Wang   +5 more
wiley   +1 more source

Paleomagnetism of the Late Paleogene and Neogene rocks of the Serbian Carpatho-Balkanides: Tectonic implications [PDF]

Geološki Anali Balkanskoga Poluostrva, 2002
This paper focuses on results of the paleomagnetic research conducted in the territory of Serbian Carpatho-Balkanides, within the following basinal domains: Babušnica-Koritnik (the Oligocene deposits), Žagubica (the upper part of the Lower Miocene and ...
Marović Milun, Đoković Ilija M., Milićević Vlada, Toljić Marinko, Gerzina Nataša S.   +4 more
doaj   +1 more source