An updated catalog of pre-hispanic archaeomagnetic data for north and central Mesoamerica: Implications for the regional paleosecular variation reference curve

  1. Ana Ma. Soler-Arechalde 1
  2. Cecilia Caballero-Miranda 1
  3. Jaime Urrutia-Fucugauchi 1
  4. María Luisa Osete-López 2
  5. Verónica López-Delgado 1
  6. Avto Goguitchaichvili 1
  7. Alan Barrera-Huerta 1
  1. 1 Universidad Nacional Autónoma de México
    info

    Universidad Nacional Autónoma de México

    Ciudad de México, México

    ROR https://ror.org/01tmp8f25

  2. 2 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

Revista:
Boletín de la Sociedad Geológica Mexicana

ISSN: 1405-3322

Ano de publicación: 2019

Tomo: 71

Número: 2

Páxinas: 497-518

Tipo: Artigo

DOI: 10.18268/BSGM2019V71N2A16 DIALNET GOOGLE SCHOLAR lock_openAcceso aberto editor

Outras publicacións en: Boletín de la Sociedad Geológica Mexicana

Resumo

Despite the immense cultural heritage of Mesoamerica, there is still no reference archaeomagnetic curve available for Central Mexico and adjacent areas. The present research has two simultaneous objectives: to obtain finer characteristics of the geomagnetic field elements over archaeological past, and to build up a reliable regional archaeomagnetic dating tool for the time span of 350 BC. to 1500 AD. For these purposes, 72 previous were compiled and analyzed with 40 new data selected from unpublished reports and theses performed in the paleomagnetic laboratories of the Geophysics Institute of UNAM (CDMX and Morelia). Most of the samples carry thermo-remanent magnetization, 31 cases were unburned stuccos, and 3 mural paintings carrying detrital or pictorial remanent magnetization. A total of 112 archaeomagnetic directions constitute the core of the updated catalogue. Special effort should be paid for to the time intervals of 500 BC.-AD. 200 and AD. 1200-325 where there is a major lack of reliable archaeomagnetic results. The present paleosecular variation curve agrees reasonably well with the fluctuation observed in the SW United States area. The differences in the intervals between AD. 600-720, AD. 850 and 1000 and AD. 1200-1325 may be rather attributed to the lack of reliable data than to local non-dipole field. It is urgent to gather a greater number of high-quality data supported by radiome tric ages to improve the reference curve in both regions.

Fonte de datos: Dialnet