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Article

Open Access

Application of Microgravimetry to Assessing Collapse Risk in Carbonate Sinkhole Areas, Cheria Basin, Northeast of Algeria

Author(s)

BOUHLASSA Saddek, FEHDI Chemseddine and BOUBAYA Djamel

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DOI:10.17265/1934-7391/2017.05.004

Affiliation(s)

Department of Geology, Larbi Tebessi University, Tebessa 12002, Algeria

ABSTRACT

This study presents the results and the interpretation of a microgravity survey realized in the MChentel zone near Cheria tone situated in the Northeast Algerian. The microgravity survey, made during April and March, 2016, allowed the obtaining of 614 measures distributed on the whole zone of study. The gravimetric data were measured by means of a gravimeter relative GNU-KC 444 were used with location and the height of stations with centimetric precision by pocket GPS and an electronic theodolite type Qeo FET 420 k. The gravimetric data measured on the ground were connected with a reference gravimetric station situated near the zone of study. On the scale of the zone of study, the gravimetric data show a decrease of the values of the anomaly of Bouguer between both collapses. This trend implies probably an effect of karstification which would explain the decrease of the values of the anomaly of Bouguer by going to the center of the studied zone. The interpretation of gravimetric data shows the presence essentially of two negative zones, they present a deficit of in-depth mass which can be 30 meters.

KEYWORDS

Microgravity survey, MChentel, Bouguer anomaly.

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