Absolute paleointensity determinations by using of conventional double-heating and multispecimen approaches on a Pliocene lava flow sequence from the Lesser Caucasus

Goguitchaichvili, Avto; Caccavari, Ana; Calvo‐Rathert, Manuel; Morales, J.; Solano, Miguel Cervantes; Vashakidze, G. T.; He, Huaiyu; Vegas, Néstor

doi:10.1016/j.pepi.2016.06.002

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…On the other hand, the high Curie temperatures might be attributed to the presence of partially oxidized magnetite, i.e., to the maghemitization of magnetite. The Curie temperature of this phase would be related to the degree of oxidation and lies between magnetite and maghemite Curie temperatures (Gehring et al, 2009;Liu et al, 2001). Usually in this type of basalts a high temperature oxidation is observed in which ilmenite and magnetite exsolution is produced.…”

Section: Rock Magnetic Resultsmentioning

confidence: 99%

“…Since the 1990s, several new paleomagnetic and paleointensity studies have been carried out in the Djavakheti region, using modern methodology applying strict reliability and quality criteria. Many of them were carried out on Pliocene and Pleistocene lava flow sequences (Caccavari et al, 2014;Calvo-Rathert et al, 2011Camps et al, 1996;Goguitchaichvili & Pares, 2000;Goguitchaichvili et al, 1997Goguitchaichvili et al, , 2001aGoguitchaichvili et al, , 2009Goguitchaichvili et al, , 2016. In these previous studies, several episodes of unstable field behavior could be observed.…”

Section: Introductionmentioning

confidence: 99%

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Evidence of Unusual Geomagnetic Regimes Recorded in Plio‐Pleistocene Volcanic Sequences from the Lesser Caucasus (Southern Georgia)

Sánchez‐Moreno

Calvo‐Rathert

Goguitchaichvili

et al. 2018

Geochem Geophys Geosyst

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We report a detailed paleomagnetic study on two Plio‐Pleistocene lava flow sequences from the Djavakheti Highland, Lesser Caucasus. The Korkhi sequence is composed of two volcanic successions of distinct age (1.9 and 3.1 Ma), while the Apnia sequence was emplaced between 3.8 and 3.1 Ma according to available radiometric datings. Normal, reverse and intermediate polarities have been determined from both sequences. Mean directions of the normal and reverse polarity groups for each section do not match the expected field direction, but the possibility of tectonic rotations has been dismissed. A composite analysis of paleomagnetic directions, of virtual geomagnetic pole (VGP) scatter and available paleointensity results from a previous study, allow the interpretation of the observed paleomagnetic results. In the Apnia sequence, both a short recording time unable to average paleosecular variation (PSV) and an anomalous Earth magnetic field (EMF) record are responsible for the observed paleomagnetic directions. According to paleomagnetic results and radiometric ages, this sequence most probably records the reverse to normal polarity transition C2Ar to C2An‐3n. The upper Korkhi subsequence yields an anomalous EMF record, reflecting a transitional time interval. Paleomagnetic results and available absolute ages suggest that this subsequence either records transition C2r‐1r to Olduvai or Olduvai to C1r‐2r. The lower Korkhi subsequence registers a normal polarity interval within the Gauss chron, reflecting a stable stage of the EMF.

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Section: Rock Magnetic Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evidence of Unusual Geomagnetic Regimes Recorded in Plio‐Pleistocene Volcanic Sequences from the Lesser Caucasus (Southern Georgia)

Sánchez‐Moreno

Calvo‐Rathert

Goguitchaichvili

et al. 2018

Geochem Geophys Geosyst

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Noise across Olduvai Subchron: Paleomagnetic study of a Pliocene lava succession from Javakheti Highland (Georgia, Lesser Caucasus)

Goguitchaichvili¹,

Gómez²,

Rathert

et al. 2021

Physics of the Earth and Planetary Interiors

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An Integrated Paleomagnetic, Multimethod‐Paleointensity, and Radiometric Study on Cretaceous and Paleogene Lavas From the Lesser Caucasus: Geomagnetic and Tectonic Implications

Calvo‐Rathert

Bógalo

Morales³

et al. 2021

JGR Solid Earth

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Paleomagnetic and paleointensity data can supply evidence about the past characteristics and fluctuations of the geomagnetic field. Such information provides constraints which contribute to an improved knowledge of the processes taking place in the deep interior of the Earth (e.g., Biggin & Paterson, 2015). When a rock is magnetized in the Earth's magnetic field (EMF), its remanence vector is generally (nearly) parallel to the latter. Thus, information about directional EMF variations can be in principle directly determined

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Absolute paleointensity determinations by using of conventional double-heating and multispecimen approaches on a Pliocene lava flow sequence from the Lesser Caucasus

Cited by 4 publications

References 38 publications

Evidence of Unusual Geomagnetic Regimes Recorded in Plio‐Pleistocene Volcanic Sequences from the Lesser Caucasus (Southern Georgia)

Evidence of Unusual Geomagnetic Regimes Recorded in Plio‐Pleistocene Volcanic Sequences from the Lesser Caucasus (Southern Georgia)

Noise across Olduvai Subchron: Paleomagnetic study of a Pliocene lava succession from Javakheti Highland (Georgia, Lesser Caucasus)

An Integrated Paleomagnetic, Multimethod‐Paleointensity, and Radiometric Study on Cretaceous and Paleogene Lavas From the Lesser Caucasus: Geomagnetic and Tectonic Implications

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