Resumo

ROSALES-RODRIGUEZ, Joel; LEE BANDY, William  e  CENTENO-GARCIA, Elena. Depth of the base of the magnetic source and thermal structure of the Gulf of Mexico. Rev. mex. cienc. geol [online]. 2014, vol.31, n.2, pp.190-202. ISSN 2007-2902.

The depth to the magnetic source bottom was obtained using an exponential method applied to magnetic data from the Gulf of Mexico, on the oceanic crust mainly. The study area was subdivided by three different grid sizes: one for analysis window of 100x100 km, another analysis window of 150x1150 km and the last one for analysis window of 200x1200 km. Shallow depths obtained with the three analysis windows vary from 17.0 to 14.0 km, and the major depths from 35.0 to 37.5 km. In all three cases over the central part of the Gulf the shallow depths are observed. The observed differences between the three analysis windows are the geometries and trends. There is a better correspondence between the results using the window of 100x1100 km and the crust tectonic model from Gulf of Mexico. The lower depths are observed over the oceanic-transitional continental crust boundary, where seismic Moho depth is greater. The depths to the magnetic source bottom obtained are greater than the seismic Moho depth.

Palavras-chave : oceanic crust; exponential method; Gulf of Mexico.

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