Resultados paleomagnéticos preliminares en el sector occidental del Alto Atlas Central, Demnatimplicaciones tectónicas

  1. S. Torres-López 1
  2. J.J. Villalaín 1
  3. A. Casas 2
  4. H. el Ouardi 3
  5. B. Moussaid 4
  1. 1 Universidad de Burgos
    info

    Universidad de Burgos

    Burgos, España

    ROR https://ror.org/049da5t36

  2. 2 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

  3. 3 Université Moulay Ismail
  4. 4 Université Hassan II
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Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Ano de publicación: 2016

Título do exemplar: IX CONGRESO GEOLÓGICO DE ESPAÑA

Número: 16

Páxinas: 897-900

Tipo: Artigo

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Outras publicacións en: Geotemas (Madrid)

Resumo

We present the preliminary results of a paleomagnetic study in Mesozoic sediments of the Demnat-Skoura Culmination, in the Moroccan High Atlas. The magnetization of the Triassic and Jurassic studied series is dominated by a remagnetization with a very stable behavior and systematic normal polarity. We have calculated the characteristic direction of the remagnetization using the small circles method, the result obtained is D= 338.9º, I = 45.9º. Comparing this direction with the Global Apparent polar Wander Path (GAPWP) for Northern Africa we can assign a Cenomanian age (about 100 M.a.), similar to that obtained in other regions of the Central High Atlas. This work allows us to observe that most of the structures analyzed along the Demnat-Skoura Culmination profile are pre- Cenozoic and do not result from African-Eurasia compression. The absence of intrusions and Diapirism in this area, and the location of paleomagnetic sites at a structural level below, or lacking a regional décollement level of the Atlas revives the hypothesis of possible moderate deformations during the Middle Jurassic in Central Moroccan High Atlas.

Fonte de datos: Dialnet