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Earth, Planets and Space
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Early cretaceous absolute geomagnetic paleointensities from Córdoba Province (Argentina)

الأحجام الجيومغناطيسية المطلقة الطباشيرية المبكرة من مقاطعة قرطبة (الأرجنتين)
Authors: Rubén Cejudo; Avto Goguitchaichvili; Silvana Evangelina Geuna; L. M. Alva‐Valdivia; Jesús Solé; Juan Morales;

Early cretaceous absolute geomagnetic paleointensities from Córdoba Province (Argentina)

Abstract

Abstract We present here new paleointensity and geochronology results from Early Cretaceous volcanic rocks of Sierra Chica de Cordoba (Argentina). The new K-Ar isotopic ages of 5 samples range from 136 to 122 Ma. Twenty five samples from 7 individual flows yielded acceptable paleointensity estimates. The mean paleointensity values per flow are ranging from 53.0 ± 1.9 to 25.4 ± 2.6 μT and the corresponding Virtual Dipole Moments (VDMs) are ranging from 9.3±1.3 to 4.6±0.5 (1022 Am2). This corresponds to the mean value of 7.3±1.7×1022 Am2, which is compatible to the present geomagnetic axial dipole. Currently available selected paleointensity data from 80 to 130 Ma suggest that geomagnetic field strength frequently fluctuated before and during the Cretaceous Normal Superchron while the magnetic polarity maintained stable. The mean paleointensities derived from Córdoba lavas agree remarkably well with those obtained from the Paraná Magmatic Province (133–132 Ma). This reinforces the hypothesis about the unreliability of ‘Mesozoic Dipole Low’. Key words: Paleointensity, rock-magnetism, Early Cretaceous, South America.

Country
Argentina
Keywords

geomagnetism, Atmospheric Science, Paleomagnetism, Paleomagnetic Data, Geochronology, geochronology, Argentina, ROCK-MAGNETISM, Early Cretaceous, Magnetosome Formation in Prokaryotes, EARLY CRETACEOUS, Quantum mechanics, Cretaceous, rock-magnetism, https://purl.org/becyt/ford/1.5, Volcanic rock, Biochemistry, Genetics and Molecular Biology, volcanic rock, SOUTH AMERICA, rock property, PALEOINTENSITY, https://purl.org/becyt/ford/1, Geophysical Exploration and Monitoring Techniques, Molecular Biology, Volcano, Earth's magnetic field, Physics, Cordoba [Argentina], Magnetostratigraphy, paleomagnetism, Life Sciences, Paleontology, Geology, FOS: Earth and related environmental sciences, South America, magnetic intensity, Structural basin, Earth and Planetary Sciences, Geomagnetic reversal, Climate Change and Paleoclimatology, Geophysics, Magnetic field, Physical Sciences, Paleointensity, Mesozoic

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
16
Average
Average
Average
Green
Published in a Diamond OA journal