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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/4586

    Título
    A comparison of Thellier-type and multispecimen paleointensity determinations on Pleistocene and historical lava flows from Lanzarote (Canary Islands, Spain)
    Autor
    Calvo Rathert, ManuelAutoridad UBU Orcid
    Morales Contreras, Juan J.
    Carrancho Alonso, ÁngelAutoridad UBU Orcid
    Goguitchaichvili, Avto
    Publicado en
    Geochemistry, Geophysics, Geosystems. 2016, V. 17, n. 9, p. 3638–3654
    Editorial
    American Geophysical Union (AGU)
    Fecha de publicación
    2016-09
    ISSN
    1525-2027
    DOI
    10.1002/2016GC006396
    Resumen
    Sixteen Miocene, Pleistocene, and historic lava flows have been sampled in Lanzarote (Canary Islands) for paleointensity analysis with both the Coe and multispecimen methods. Besides obtaining new data, the main goal of the study was the comparison of paleointensity results determined with two different techniques. Characteristic Remanent Magnetization (ChRM) directions were obtained in 15 flows, and 12 were chosen for paleointensity determination. In Thellier-type experiments, a selection of reliable paleointensity determinations (43 of 78 studied samples) was performed using sets of criteria of different stringency, trying to relate the quality of results to the strictness of the chosen criteria. Uncorrected and fraction and domain-state corrected multispecimen paleointensity results were obtained in all flows. Results with the Coe method on historical flows either agree with the expected values or show moderately lower ones, but multispecimen determinations display a large deviation from the expected result in one case. No relation can be detected between correct or anomalous results and paleointensity determination quality or rock-magnetic properties. However, results on historical flows suggest that agreement between both methods could be a good indicator of correct determinations. Comparison of results obtained with both methods on seven Pleistocene flows yields an excellent agreement in four and disagreements in three cases. Pleistocene determinations were only accepted if either results from both methods agreed or a result was based on a sufficiently large number (n>4) of individual Thellier-type determinations. In most Pleistocene flows, a VADM around 5 31022 Am2 was observed, although two flows displayed higher values around 931022 Am2.
    Materia
    Magnetism
    Paleontology
    Magnetismo
    Paleontología
    URI
    http://hdl.handle.net/10259/4586
    Versión del editor
    http://dx.doi.org/10.1002/2016GC006396
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    • Artículos PALEOMAG-UBU
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    Nombre:
    Calvo-GGG_2016.pdf
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    1.292Mb
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