Search Results - "Prévot, Michel"

Single-domain chemical, thermochemical and thermal remanences in a basaltic rock by Draeger, Ulrike, Prévot, Michel, Poidras, Thierry, Riisager, Janna

“…Tiny basaltic samples containing finely grained titanomagnetite with Curie temperature less than 100°C were heated in air in weak field (25–100μT) at…”
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Investigating the reasons for the failure of palaeointensity experiments: a study on historical lava flows from Mt. Etna (Italy) by Calvo, Manuel, Prévot, Michel, Perrin, Mireille, Riisager, Janna

“…A refined palaeointensity experiment, accompanied by rock-magnetic studies, has been carried out on six lava flows from 1910 and 1928 from Mt. Etna. The…”
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Possible mechanisms causing failure of Thellier palaeointensity experiments in some basalts by Kosterov, Andrei A., Prévot, Michel

“…The normally magnetized zone of the Jurassic Lesotho basalts, although providing apparently quite reliable palaeofield directions Kosterov & Perrin 1996),…”
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Absence of preferred longitude sectors for poles from volcanic records of geomagnetic reversals by Prévot, Michel, Camps, Pierre

“…ACCORDING to a recent compilation of sedimentary records from the past 12 Myr, the reversing geomagnetic field displays a marked long-term longitudinal…”
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The Age of Paraná Flood Volcanism, Rifting of Gondwanaland, and the Jurassic-Cretaceous Boundary by Renne, Paul R., Ernesto, Marcia, Pacca, Igor G., Coe, Robert S., Glen, Jonathon M., Prévot, Michel, Perrin, Mireille

“…The Paraná-Etendeka flood volcanic event produced ×1.5 × 10$^6$ cubic kilometers of volcanic rocks, ranging from basalts to rhyolites, before the separation of…”
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Magnetism of oriented single crystals of hemoilmenite with self-reversed thermoremanent magnetization by Goguitchaichvili, Avto, Prévot, Michel

“…Ten large, single crystals of hemoilmenite (yFeTiO3 (1‐y)Fe2O3) with y close to 0.54 were extracted from the self‐reversed Pinatubo dacitic pumice erupted in…”
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Geomagnetic paleosecular variation recorded in Plio-Pleistocene volcanic rocks from Possession Island (Crozet Archipelago, southern Indian Ocean) by Camps, Pierre, Henry, Bernard, Prévot, Michel, Faynot, Liliane

“…Possession Island, in the Crozet Archipelago, consists of volcanic units erupted mainly between ∼5 and 0.5 Ma. A paleomagnetic sampling was carried out along…”
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Revisiting the Jurassic geomagnetic reversal recorded in the Lesotho Basalt (Southern Africa) by Prévot, Michel, Roberts, Neil, Thompson, John, Faynot, Liliane, Perrin, Mireille, Camps, Pierre

“…SUMMARY We carried out a detailed and continuous palaeomagnetic sampling of the reversed to normal geomagnetic transition recorded by some 60 consecutive flow…”
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The mechanism of self-reversal of thermoremanence in natural hemoilmenite crystals: new experimental data and model by Prévot, Michel, Hoffman, Kenneth A., Goguitchaichvili, Avto, Doukhan, Jean-Claude, Shcherbakov, Valera, Bina, Mansour

“…New magnetic and mineralogical findings on self-reversing hemoilmenite (Fe 2− y Ti y O 3) grains from Pinatubo lavas (1991 eruption) provide important clues…”
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A Statistical Model of the Fluctuations in the Geomagnetic Field from Paleosecular Variation to Reversal by Camps, Pierre, Prévot, Michel

“…The statistical characteristics of the local magnetic field of Earth during paleosecular variation, excursions, and reversals are described on the basis of a…”
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Magnetostratigraphy and paleontology of Aït Kandoula basin (High Atlas, Morocco) and the African-European late Miocene terrestrial fauna exchanges by Benammi, Mouloud, Calvo, Manuel, Prévot, Michel, Jaeger, Jean-Jacques

“…A magnetostratigraphic study has been carried out on a middle Miocene to upper Pliocene lacustrine sedimentary deposit in the central part of the Aït Kandoula…”
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An attempt to determine the absolute geomagnetic field intensity in Southwestern Iceland during the Gauss–Matuyama reversal by Goguitchaichvili, Avto, Prévot, Michel, Thompson, John, Roberts, Neil

“…We have measured the variation in the intensity of the geomagnetic field during the Gauss–Matuyama (N4–R3) polarity reversal by application of the Thelliers'…”
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Thermodetrital and crystallodetrital magnetization in an Icelandic hyaloclastite by Goguitchaichvili, Avto, Prévot, Michel, Dautria, Jean‐Marie, Bacia, Maria

“…An Icelandic hyaloclastite, mostly composed of millimetric fragments of basaltic glass, that is fresh at the bottom of the unit but largely palagonitized in…”
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Transitional geomagnetic impulse hypothesis: Geomagnetic fact or rock-magnetic artifact? by Camps, Pierre, Coe, Robert S., Prévot, Michel

“…A striking feature of the Steens Mountain (Oregon) geomagnetic polarity reversal is the two (maybe three) extremely rapid field directional changes (6 degrees…”
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Intensity of the Earth's magnetic field since Precambrian from Thellier-type palaeointensity data and inferences on the thermal history of the core by Prévot, Michel, Perrin, Mireille

“…We present a compilation of palaeointensity data obtained by the Thellier method from magmatic rocks up to 3.5 Gyr old. No apparent very long-term variation…”
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Paleointensity of the Earth's magnetic field in the Jurassic: New results from a Thellier study of the Lesotho Basalt, southern Africa by Kosterov, Andrei A., Prévot, Michel, Perrin, Mireille, Shashkanov, Vladimir A.

“…Thellier paleointensity experiments carried out on the Jurassic (180 m.y. old) Karoo basalt, Lesotho, southern Africa, provided paleointensity estimates for 40…”
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Revisiting the initial sites of geomagnetic field impulses during the Steens Mountain polarity reversal by Camps, Pierre, Prévot, Michel, Coe, Robert S.

“…We present a new palaeomagnetic investigation of the two sites from the Steens Mountain (Oregon) volcanic record of a Miocene polarity reversal which were…”
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Rotation of the Semail ophiolite (Oman): Additional Paleomagnetic data from the volcanic sequence by Perrin, Mireille, Plenier, Guillaume, Dautria, Jean-marie, Cocuaud, Emmanuel, Prévot, Michel

“…Thirty-two flows (247 cores) were sampled in the V1 (Geotimes) and V2 (Lasail) volcanic units of the Semail ophiolite, Oman (Aswad, Fizh, Hilti, Sarami,…”
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Paleomagnetic and geochronological study of a geomagnetic field reversal or excursion recorded in pliocene volcanic rocks from Georgia (Lesser Caucasus) by Camps, Pierre, Ruffet, Gilles, Shcherbakov, Valera P., Shcherbakova, Valja V., Prévot, Michel, Moussine-Pouchkine, Alexis, Sholpo, Lolij, Goguitchaichvili, Afthandil, Asanidzé, Bejan

“…A 250-m thick volcanic sequence of some 63 Pliocene lava flows from Georgia (Akhalkalaki plateau) which was previously thought to record the Gauss-Matuyama…”
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How the geomagnetic field vector reverses polarity by Prévot, Michel, Mankinen, Edward A, Grommé, C. Sherman, Coe, Robert S

“…A highly detailed record of both the direction and intensity of the earth's magnetic field as it reverses has been obtained from a Miocene volcanic sequence…”
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