TITLE:
Elaboration of the Hydro-Geophysics GIS Showing the Volubilis Depression and the Prerifains Ridges Structuration (Morocco North Occidental)
AUTHORS:
Asma Ben Moussa, Abdelaziz Mridekh, Bouabid El Mansouri, Ahmed Manar, Mohamed Chibout
KEYWORDS:
Prerifaines Ridges, Volubilis, Miocene, Electric, Gravimetric, GIS Hydro-Geophysics
JOURNAL NAME:
International Journal of Geosciences,
Vol.6 No.6,
June
26,
2015
ABSTRACT: We present a comparative
analysis of electrical and gravity data on the Geographic Information System of
the prerifaines ridges. At the Meso-Cenozo?c sequence, the geometry of the
prerifaines ridges is fairly well known. However, the post-Miocene series
remain to be characterized. In this perspective, we use a database composed of
gravity and vertical electrical sounding profiles and geo-electrical sections
in order to characterize this structuration. These data are calibrated by many
oil and hydrogeological boreholes. Preliminary results lead to better
understanding of the organization of its underlying structures in this area.
The Gravimetric filtering results show that the area may be dissected by tree
major faults striking NW-SE, NE-SW and N-S. All these faults have contributed,
since Hercynian to Alpines orogenies, to the structuring of this area, being
proved to be the deepest and can reach 4500 m. The comparison of gravity maps,
geological and structural maps under Geographic Information System allows the
identification of major structural directions and trends of the study area. It
confirms some structural elements gathered from outcrops and define new ones.
Results from this work show the importance of using various filtering and
interpretation techniques in the analysis of gravity data. They also provide
news insights into the deep structure of the study area.