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Título del libro: Optimized Arrays For Resistivity Measurements Confined To The Perimeter Of A Survey Area
Título del capítulo: A special ERT-3D array carried out to investigate the subsoil of the Pyramid El Castillo, Chichen Itza, Mexico

Autores UNAM:
RENE EFRAIN CHAVEZ SEGURA; ANDRES TEJERO ANDRADE; GERARDO CIFUENTES NAVA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2015
Palabras clave:

Architecture; Geology; Geophysics; Soils; Ancient structures; Apparent resistivity; Archaeological site; Electric resistivity tomography; Electrical methods; Geophysical information; Low resistivity; Yucatan peninsula; Structural geology


Resumen:

It is not always possible to apply traditional 3D electrical methods to investigate the subsoil beneath ancient structures in archaeological sites. Special three dimensional electric resistivity tomography (ERT-3D) arrays have been designed to 'illuminate' the subsoil beneath the structure under study. The square array was designed to surround the target to acquire reliable geophysical information from the subsurface. This ERT-3D array is applied to investigate the subsoil of the pyramid of El Castillo, located in the archaeological site of Chichen Itza, in the southern lowlands of Mexico, in the Yucatan Peninsula. This building is the emblematic structure of this well-known site and elected as one of the man-made world seven wonders. Previous GPR studies provided evidences of a buried man-made tunnel excavated within the limestone rocks near this ancient structure. Now, and ERT-3D study was carried out by employing 96 flat-surface electrodes, which surrounded the edifice forming a square geometry. A total of 8,500 apparent resistivity observations were measured, with a total depth of investigation of 25 m. A low resistivity body was found beneath the pyramid, which can be associated to a sinkhole filled with sweet water. © (2015) by the European Association of Geoscientists & Engineers (EAGE).


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