Integrated geophysical measurements on a test site for detection of buried steel drums

Abstract

Geophysical methods are increasingly used to detect and locate illegal waste disposal and buried toxic steel drums. This study describes the results of a test carried out in clayey-sandy ground where 12 empty steel drums had previously been buried at 4-5 m below ground level. This test was carried out with three geophysical methods for steel-drum detection: a magnetometric survey, electrical resistivity tomography with different arrays, and a multifrequency frequency-domain electromagnetic induction survey. The data show that as partially expected, the magnetometric and electromagnetic induction surveys detected the actual steel drums buried in the subsurface, while the electrical resistivity tomography mainly detected the changes in some of the physical properties of the terrain connected with the digging operations, rather than the actual presence of the steel drums.

In-situ Location of Precious Stones using Magnetic Data and Pseudo-Gravity Transforms in Parts of the Nupe Basin Area of Nigeria

“…3,107 km 2 in the Pategi (Sheet 204) area of Bida basin, central Nigeria. The vegetation is of the Guinea savannah type with two distinct seasons (rainy and dry) [15] with tropical Guinea type climate [16].…”

Application of Aeromagnetic Data and Pseudogravity Transforms in the Analysis of Structures and Mineralization Potential of Osi NE, Southwestern Nigeria

“…Euler Deconvolution (Paterson et al, 1991;Cowan et al, 2000;Mahmoodi, 2016) while tanks and drums have been detected or explored worldwide with structural indices 3.0 (magnetic) of 3D Euler Deconvolution (Marchetti and Settimi, 2011). Figure 7c occurrences and the largest in size, followed by Granite.…”

“…The areas where there are good number of clusters are labelled G to J for a particular structure (e.g pipe or sphere). Kimberlite pipe which is well known for hosting large quantity of minerals (diamonds and garnet) and rocks (peridotite and xenoliths) (Macnae, 1979;AtchutaRao and Sanker-Narayan, 1981;Barongo, 1983;Macnae, 1995a;1996b;Keating and Sailhac, 2004) has been detected or explored worldwide using structural index 1.1 (gravity) of 3D Euler Deconvolution (Paterson et al, 1991, Cowan et al, 2000; Mahmoodi, 2016) while tanks and drums have been detected or explored worldwide with structural index 2.0 (gravity) of 3D Euler Deconvolution (Marchetti and Settimi, 2011). Granite (3/4), Banded Gneiss (2/4) Amphibolite (1/6) and Schist (1/6).…”