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Showing 1 to 13 of 13 for “"Paleointensity"”.
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A paleomagnetic study of the angrite Sahara 99555
… a primary paleomagnetism and then to determine a paleointensity estimate and its ferromagnetic mineralogy. Our studies show that the primary ferromagnetic mineral in SAH 99555 is magnetite and there are also some accessory ferromagnetic minerals including titanomagnetite and hematite. The natural …
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Tiny Space Magnets: X-ray Microscopy and Nanopaleomagnetism of Meteoritic Metal
… a different point during its thermal evolution. Paleointensity results provide the first observations of a quiescent period in dynamo activity preceding core solidification. This also helps to constrain the paleomagnetic signals associated with core nucleation, which, in turn, constrains the …
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Paleomagnetic Investigation of Enstatite Chondrite Chondrules: Implications for the Solar Nebula
… from these chondrules. Thus, the paleointensity of the inner nebular field cannot be definitively constrained by the magnetizations of the dusty olivine chondrules.
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Remanent magnetization in angrite NWA 4931
… core yielded a pristine record, indicative of a paleointensity strength on the order of 25 [mu]T. These results, in light of magnetic measurements on other angrite samples, are suggestive of a core dynamo active for at least seven million years on the angrite parent body, beginning by 4564 Ma.
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Archaeomagnetic dating of bronze age pottery from Tell Mozan, Syria
… measurements using the Thellier-style absolute paleointensity technique of Tauxe and Staudigel (2004). Archaeointensity experiments displayed an 88% success rate and 80% of the samples correlated well with their archaeologically determined dates. A small subset of samples appeared to indicate a …
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Applications of time series analysis to geophysical data
… are magnetically stable and reliable relative paleointensity measurements could be obtained. Spectral analysis of the directions reveals a predominant 10 ky periodicity and no dominant looping direction.
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Paleomagnetism of Lonar impact glass
… that they may not be the best recorders of paleointensity. The impact glasses display clear evidence of a series of wild, directionally unstable magnetic moments when heated to temperatures in excess of 400 to 500°C that are not observed in other terrestrial samples. The simplest explanation …
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Magnetic records from latest Triassic to earliest Jurassic red beds, Utah and Arizona, and from mid-Pleistocene lake beds, New Mexico
… paleomagnetic data combined with relative paleointensity records support the presence of three geomagnetic field phenomena 14±/Calabrian Ridge II at ~536 ka, 11± at ~400 ka, and Levantine at ~360-360 ka.
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Variación de la paleointensidad absoluta del campo magnético terrestre registrada en secuencias de coladas basálticas de la región volcánica de Djavakheti (Georgia)
Este trabajo obtiene y analiza datos direccionales y de intensidad del campo magnético terrestre registrados en tres secuencias de coladas de lava plio-pleistocenas (Djavakheti, Georgia). La determinación de la paleointensidad absoluta es un proceso complejo y su fiabilidad es todavía …
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Tectonics of the East Pacific rise : studies of faulting characteristics and magnetic and gravity anomalies
… within the Brunhes epoch, variations in the paleointensity of the Earth's field, variations in the magnetization intensity of the source rock due to variability in the magmatic supply, and variations in the degree of hydrothermal alteration at the rise axis. On the basis of comparisons of …