INVESTIGADORES
OSELLA Ana Maria
artículos
Título:
3D electrical imaging of an archaeological site using electric and electromagnetic methods
Autor/es:
OSELLA, ANA; DE LA VEGA, MATIAS; LASCANO, EUGENIA
Revista:
GEOPHYSICS
Editorial:
SOC EXPLORATION GEOPHYSICISTS
Referencias:
Año: 2005 vol. 70 p. 101 - 107
ISSN:
0016-8033
Resumen:
Floridablanca is an 18th century archaeological site located in South Argentina. The archaeological investigations at the site began in 1998 and in 2000 we started a project to perform geophysical studies there. In this paper we report the implementation of electric and electromagnetic methods in a sector of the site which corresponded to the settler?s houses. The objective of the prospection was to characterize the zone and the buried archaeological structures (adobe walls, tiles from a roof collapse) with 2D and 3D electric and electromagnetic techniques. We first applied an Electromagnetic Induction Method covering a 600 m2 area within a frequency ranging from 1000 to 19000 Hz. A 3D visualization of the In-Phase and Quadrature components gave a first description of anomalies possibly associated with buried structures. We then performed eighteen dipole-dipole profiles and inverted the data to obtain the corresponding 2D and 3D electrical tomographies. Finally, after correlating the information obtained from the analysis of both electromagnetic and electric data, we performed a more localized 3D dipole-dipole mesh (25 m2) to achieve the final electrical imaging of the most representative buried structure. The results obtained in this paper were lately confirmed by an archaeological  excavation.