Estudio preliminar de las propiedades magnéticas de los estromatolitos de manganeso de la cueva de El Soplao(Cantabria, España)

  1. J.J. Villalaín 1
  2. C. Rossi 2
  3. R.P. Lozano 3
  1. 1 Universidad de Burgos
    info

    Universidad de Burgos

    Burgos, España

    ROR https://ror.org/049da5t36

  2. 2 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  3. 3 Instituto Geológico y Minero de España
    info

    Instituto Geológico y Minero de España

    Madrid, España

    ROR https://ror.org/04cadha73

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Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Any de publicació: 2012

Títol de l'exemplar: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Número: 13

Pàgines: 1204-1207

Tipus: Article

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Altres publicacions en: Geotemas (Madrid)

Resum

Manganese stromatolites have been recently discovered in El Soplao cave (Cantabria, Spain). These rocks are unique since it was previously unknown that they could form in the dark region of caves. We have studied the magnetic properties, which are dominated by the paramagnetic fraction. However the natural remanent magnetization (NRM) contains a very stable component carried by magnetite, showing normal and reversed polarities. The reversed polarities dominate. These results indicate that the minimum age of the El Soplao stromatolites is older than the Brunhes/Matuyama polarity transition (~780.000 años).

Fuente de los datos: Dialnet