Resultados paleomagnéticos preliminares en el vulcanismo neógeno de la Sierra de Las Cruces (Valle de México, México)

• M.L.Osete ^[1] ; V.C. Ruiz ^[1] ; C. Caballero ^[2] ; J. Urrutia - Fucugauchi ^[2]
  1. [1] Universidad Complutense de Madrid

     Universidad Complutense de Madrid

     Madrid, España

     
  2. [2] Instituto de Geoflsica. Universidad Autónoma Nacional de México (UNAM).
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 5, 1996, págs. 1025-1028
• Idioma: español
• Títulos paralelos:
  • Preliminary palaeomagnetic results on fhe neogene vullcanism from Sierra de Las Cruces (Basin of Mexico, Mexico)
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• Resumen

  • A palaeomagnetic study have been carried out on the western margin of the México basin. 24 sites from Sierra de Las Cruces were sampled and analyzed in the laboratory. A total amount of 231 samples has been fully demagnetized and a simple directional magrietic behavior was observed in all samples.

    The mean direction obtained in this study is 0=353.11=31.6 (N=24 K=28.9 a95=5.6), in agreement with the expected direction. Therefore this area has not been affected by significant block rotations in contrast tb the counterclockwise rotations observed in the easternmost sector of the Transmexican Volcanic Belt (TMVB), towards the Gulf of México, and in its central"western parto In addition a magnetic zonation has beeh observed covering at least the Matuyama and Gauss polarity chrons.