Results 181 to 190 of about 4,431,213 (212)

A new method to determine paleosecular variation

Physics of the Earth and Planetary Interiors, 1994
Abstract This study is based on synthetic virtual geomagnetic pole distributions simulated by the sum of a Fisherian distribution characteristic of paleosecular variation (PSV) and a uniform distribution representing transitional data resulting from reversals and excursions of the geomagnetic field. Using such simulations, the optimum cutoff angle to
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Geomagnetic Paleosecular Variation During the Early Cretaceous

Proceedings
In this study, the amplitude of secular geomagnetic variation is investigated using directional paleomagnetic data obtained from rock samples collected in geological sections of the Paraná Basin.
E. Frigo, Alana Baioco, C. Sommer, J. Savian   +3 more
semanticscholar   +1 more source

Model of geomagnetic paleosecular variations for the Northern Hemisphere

Studia Geophysica et Geodaetica, 1991
A model of radial drifting and oscillating dipoles to represent geomagnetic palaeosecular variations, which showed to be appropriate for the Southern Hemisphere, is evaluated for the Northern Hemisphere. After a new fitting of some involved parameters, its theoretical results are compared with the palaeomagnetic data of Lake de Bouchet (France) and the
Ana M. Sinito, Juan F. Vilas
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A refined age calibrated paleosecular variation and relative paleointensity stack for the NW Barents Sea: Implication for geomagnetic field behavior during the Holocene

, 2020
Reconstruction of Paleomagnetic Secular Variation (PSV) of the geomagnetic field is fundamental both to assess geodynamo models and to obtain age constraints for rocks, sediments and archaeological material. We present refined age-calibrated Holocene PSV
C. Caricchi, L. Sagnotti, S. A. Campuzano, R. Lucchi, P. Macrì, M. Rebesco, A. Camerlenghi   +6 more
semanticscholar   +1 more source

On low-degree spherical harmonic models of paleosecular variation

Physics of the Earth and Planetary Interiors, 1996
Geomagnetic field directions over the past few millions of years have recently been compiled and these data bases can be used to build low-degree spherical harmonic models of the time-averaged field (TAF) and its paleosecular variation (PSV) variance structure.
Quidelleur, Xavier, Courtillot, Vincent
openaire   +2 more sources

Holocene paleosecular variation from dated lava flows on Maui (Hawaii)

Physics of the Earth and Planetary Interiors, 2007
ow inclination and low secular variation seem to be present for at least the past 5 Myear in central Pacific. The period covering the past 10 kyear is crucial to the study of the field variability and to fill the gap between historical field measurements and long-term paleomagnetic records.
Herrero-Bervera, Emilio, Valet, Jean-Pierre   +1 more
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First archaeointensity reference paleosecular variation curve for South America and its implications for geomagnetism and archaeology

Quaternary Research, 2019
We report comprehensive rock-magnetic and archaeointensity investigations from 21 well-constrained pottery fragments from the Catamarca province of northwest Argentina.
A. Goguitchaichvili, C. Greco, Rafael Garcia Ruiz, Lucas Pereyra Domingorena, R. Cejudo, J. Morales, C. Gogorza, Cristina Scattolin, M. Tarragó   +8 more
semanticscholar   +1 more source

Paleosecular variation of the Honolulu Volcanic Series, Oahu, Hawaii

Journal of Geophysical Research, 1972
A paleomagnetic study of 193 sample cores drilled from 25 sites (lava flows) in the Honolulu volcanic series exposed on SE Oahu, Hawaii, yielded a mean angular standard deviation of 9.4°, with 95% confidence limits between about 7.7° and 11.9°. Thus, these lavas in the Brunhes normal polarity epoch confirm an earlier low value for paleosecular ...
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Regionally consistent Western North America paleomagnetic directions from 15 to 35 ka: Assessing chronology and uncertainty with paleosecular variation (PSV) stratigraphy

Quaternary Science Reviews, 2018
New Paleomagnetic Secular Variation (PSV) data from Fish Lake, Utah, USA, along with previously published regional records, allow us to build an independently dated Western North America PSV stack (WNAM17) from about 35 to 15 ka that quantifies dating ...
B. Reilly, J. Stoner, R. Hatfield, M. Abbott, D. Marchetti, D. Larsen, M. Finkenbinder, A. Hillman, Stephen Kuehn, C. Heil   +9 more
semanticscholar   +1 more source

Paleosecular variations of the geomagnetic field during the Holocene from Eastern Asia

Physics of the Earth and Planetary Interiors, 2016
Abstract High-resolution paleomagnetic secular variation (PSV) records bear great information of dynamics processes of the Earth’s geomagnetic field, and can be further used for inter-profile correlation and for dating sediments. However, effects of changes in the depositional environment on PSV records have not been fully determined.
Xiaoqiang Yang, Qingsong Liu, Kefu Yu, Wenya Huang, Liyan Zhu, Huodai Zhang, Jian Liu, JinHua Li   +7 more
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