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- W1999376453 abstract "Abstract This paper deals with the magnetic fabric and remanent magnetization of welded scoriae fall deposits. Four scoriae blankets were emplaced on Vulcano (Aeolian Islands) from about 50 to 8 ka. Their detailed chronostratigraphic position has been debated in the literature and they have therefore been given a different interpretation in the reconstruction of the Vulcano's eruptive history. The aims of the study were a better understanding of the magnetic features of the scoriae fall deposits, which have so far been given little attention, and to set the chronostratigraphic relationships of the sampled deposits on the ground of their palaeomagnetic directions. Overall, the magnetic properties of the four deposits are alike. Investigation of isothermal remanence and susceptibility versus temperature measurements point to low-Ti titanomagnetite as the main ferromagnetic mineral. Magnetic foliation is well developed, moderately dispersed and in most cases close to horizontal. Lineation is either clustered or dispersed within the foliation plane. Stepwise thermal and alternating field demagnetization shows that secondary components are negligible in two units. In the other two, they are always completely removed in the first steps, below 20 mT or 400°C. Thereafter, the characteristic component (ChRM) is clearly isolated and the within-site dispersion of its direction is small ( α 95 α 95 The palaeomagnetic results corroborate the hypothesis that the investigated scoriae deposits correspond to different volcanic phases, related to recurrent arrival of mafic magma, and show that those of Spiaggia Lunga and Quadrara were produced during two distinct periods of volcanic activity with little time separation between them." @default.
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- W1999376453 date "2001-06-01" @default.
- W1999376453 modified "2023-09-25" @default.
- W1999376453 title "Palaeomagnetism of welded, pyroclastic-fall scoriae at Vulcano, Aeolian Archipelago" @default.
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- W1999376453 doi "https://doi.org/10.1016/s0377-0273(00)00298-5" @default.
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