Late Miocene remagnetization within the internal sector of the Northern Apennine, Italy. (Articolo in rivista)

Type
Label
  • Late Miocene remagnetization within the internal sector of the Northern Apennine, Italy. (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Aiello I.W., Hagstrum J.T., Principi G. (2004)
    Late Miocene remagnetization within the internal sector of the Northern Apennine, Italy.
    in Tectonophysics (Amst. Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Aiello I.W., Hagstrum J.T., Principi G. (literal)
Pagina inizio
  • 1 (literal)
Pagina fine
  • 14 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 383 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Late Miocene remagnetization within the internal sector of the Northern Apennine, Italy. (literal)
Abstract
  • Paleomagnetic and geologic evidence indicates that Upper Jurassic radiolarian cherts of both the Tuscan Cherts Formation (continental margin, Tuscan Units) and the Monte Alpe Cherts Formation (oceanic crust, Ligurian Units) were remagnetized during Miocene orogenesis of the Northern Apennines of Italy. Characteristic overprint magnetizations with reversed polarities have been found over a large area within the internal sector of the Northern Apennines, including eastern Liguria, Elba Island and the Thyrrenian margin, and west of the Middle Tuscan Ridge. The reversed-polarity overprint (average direction: D=177º, /=-52º, alfa95=15º) was most likely acquired during Late Miocene uplift and denudation of the orogenic chain, and thermochemical remagnetization was a probable consequence of increased circulation of orogenic fluids. Similarly, mostly reversed-polarity directions of magnetization have been found by other workers in overlying post-orogenic Messinian sediments (D=177º, /=-57º, alfa95=3º), which show little counterclockwise (CCW) vertical-axis rotation with respect to stable Europe (-8±5º). The Monte Alpe Cherts sampled at sites in the external sector of the Northern Apennines, close to major tectonic features, have normal-polarity overprint directions with in situ W-SW declinations. Since the overlying post-orogenic Messinian sediments have not been substantially rotated about vertical axes, the evidence points to an earlier, pre-Late Miocene remagnetization in the external parts of the orogenic chain. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it