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Magnetotelluric exploration of the Wagner Basin, Gulf of California, Mexico: Evidence for an axial magma chamber and hydrothermal circulation.
Journal of South American Earth Sciences ( IF 1.655 ) Pub Date : 2020-01-14 , DOI: 10.1016/j.jsames.2020.102501
Thalia Avilés Esquivel; Carlos Flores; Valeria Reyes Ortega; Steven Constable; Enrique Gómez-Treviño; Antonio González-Fernández

Different geological and geophysical disciplines have suggested the Wagner Basin as a promising location of geothermal resources. As a reconnaissance tool Magnetotelluric (MT) data were measured at 10 sites along a profile over this basin in the northern Gulf of California. The subsurface distribution of electric resistivity was estimated with two-dimensional smooth inversion using the apparent resistivities and phases from both field polarizations. We found a deep conductor underneath the center of the basin, interpreted as a region of partial melt feeding the accretion zone of this incipient oceanic crust. From six MT sites with close-by heat flow measurements, we also found a positive correlation between the interpreted shallow (first 100 m) low resistivities and high heat flows. This shows that the MT method can be used to map submarine heat sources.
更新日期:2020-01-14

 

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