Results 21 to 30 of about 4,431,213 (212)

Paleomagnetism and Paleosecular Variations From the Plio‐Pleistocene Golan Heights Volcanic Plateau, Israel [PDF]

Geochemistry, Geophysics, Geosystems, 2019
AbstractStatistical analysis of geomagnetic paleosecular variation (PSV) and time‐averaged field has been largely based on global compilations of paleomagnetic data from lava flows. These show different trends in the averaged inclination anomaly (ΔI) between the two hemispheres, with small positive (<2°) anomalies in midsouthern latitudes and large ...
Nicole Behar, Ron Shaar, Lisa Tauxe, Hanna Asefaw, Yael Ebert, Ariel Heimann, Anthony A. P. Koppers, Hagai Ron   +7 more
openaire   +6 more sources

The importance of clays in speleothem magnetic remanence acquisition [PDF]

Scientific Reports
Speleothems are promising recorders of paleosecular variation of the Earth’s magnetic field, but ambiguities remain about the physical processes active during remanence acquisition.
Rashida Doctor, Joshua M. Feinberg, Plinio Jaqueto, Ricardo Trindade, Janine A. Carmo   +4 more
doaj   +2 more sources

Assessing the reliability of paleomagnetic datasets using the R package PmagDiR [PDF]

Scientific Reports
Paleomagnetism is the most important source of information for determining the position of tectonic plates in the geological past. Over the last few decades significant advancements have been made in improving the reliability of paleomagnetic data ...
Edoardo Dallanave
doaj   +2 more sources

Latitude Dependence of Geomagnetic Paleosecular Variation and its Relation to the Frequency of Magnetic Reversals: Observations From the Cretaceous and Jurassic

Geochemistry, Geophysics, Geosystems, 2019
Nearly three decades ago paleomagnetists suggested that there existed a clear link between latitude dependence of geomagnetic paleosecular variation (PSV) and reversal frequency.
P. V. Doubrovine, T. Veikkolainen, L. Pesonen, E. Piispa, S. Ots, A. V. Smirnov, E. Kulakov, A. Biggin   +7 more
semanticscholar   +3 more sources

An activity index for geomagnetic paleosecular variation, excursions, and reversals [PDF]

Geochemistry, Geophysics, Geosystems, 2017
AbstractMagnetic indices provide quantitative measures of space weather phenomena that are widely used by researchers in geomagnetism. We introduce an index focused on the internally generated field that can be used to evaluate long term variations or climatology of modern and paleomagnetic secular variation, including geomagnetic excursions, polarity ...
S. Panovska, C. G. Constable
openaire   +5 more sources

Brunhes Paleomagnetic Directions and Paleointensities From Northern Hainan Island

Geochemistry, Geophysics, Geosystems
Paleomagnetic studies typically assume that the long‐term, time‐averaged geomagnetic field behaves as a geocentric axial dipole (GAD). While paleodirectional data over the past five million years generally agree with GAD predictions, mid‐to‐low latitude ...
Mengqing Wang, Huapei Wang, Huafeng Qin, Jian Luo, Chen Wen, Fei Han, Yiming Ma, Jiabo Liu   +7 more
doaj   +2 more sources

Constraints on Brunhes low-latitude paleosecular variation Iztaccihuatl stratovolcano, basin of Mexico

Geofísica Internacional, 1995
Los datos paleomagnéticos para lavas del volcán Iztaccíhuatl permiten analizar la variación paleosecular del campo geomagnético en la región central de Mexico.
Jaime Urrutia-Fucugauchi
doaj   +2 more sources

An archaeomagnetic study of the Ishtar Gate, Babylon. [PDF]

PLoS ONE
Data from the marriage of paleomagnetism and archaeology (archaeomagnetism) are the backbone of attempts to create geomagnetic field models for ancient times. Paleointensity experimental design has been the focus of intensive efforts and the requirements
Anita Di Chiara, Lisa Tauxe, Helen Gries, Barbara Helwing, Matthew D Howland, E Ben-Yosef   +5 more
doaj   +2 more sources

New detailed paleosecular variation record at Santa Lucía archaeological site (Corrientes province, northeastern Argentina)

Geofísica Internacional, 2011
Se reporta información paleomagnética de una sección sedimentaria del sitio arqueológico Santa Lucía, provincia de Corrientes (Nordeste de Argentina). El magnetismo remanente natural obtenido en 74 especimenes orientados mostró una remanencia magnética ...
Hugo G. Nami
doaj   +4 more sources

Persistent high paleosecular variation activity in southern hemisphere for at least 10 000 years

Earth and Planetary Science Letters, 2016
Direct observations of the geomagnetic field show that secular variation is strong in the Atlantic hemisphere, and comparatively reduced in the Pacific region. The dipole has been decaying since at least 1840 AD, driven by growth and migration of reverse
C. Constable, M. Korte, S. Panovska
semanticscholar   +3 more sources