A COMPOSITE GEOPHYSICAL INVESTIGATION OF BURUM DOLOMITIC MARBLE DEPOSIT, FEDERAL CAPITAI TERRITORY, NIGERIA
A COMPOSITE GEOPHYSICAL INVESTIGATION OF BURUM DOLOMITIC MARBLE DEPOSIT, FEDERAL CAPITAI TERRITORY, NIGERIA
| dc.contributor.author | ANEKE, SYLVANUS CHUKWUMA | |
| dc.date.accessioned | 2014-02-11T09:57:18Z | |
| dc.date.available | 2014-02-11T09:57:18Z | |
| dc.date.issued | 1988-11 | |
| dc.description | Thesis submitted to the Ahmadu Bello University in partial fulfillment of the requirements for the award of the degree of Master of Science in Applied Geophysics. Department of Physics Faculty of Science Ahmadu BPLLO University, Zaria November, 1988 | en_US |
| dc.description.abstract | A composite geophysical investigation was carried out on the Dolomite marble deposit at Burum. In the Federal Capital Territory. The aim was to delineate the lateral extent of the deposit, provide a preliminary estimate of its' quantity and to identify the geotechnical and hydrogeological conditions of the deposit. Ihe Electrical Resistivity Profiling, Vertical Electrical Sounding and VLF (EM) Methods were employed for the investigation. There is a close match and striking agreement between the outlines of the marble deposit (fig. 4.1) as obtained from the resistivity profiling (fig. 2.8) and VLF (EM) data (figs 2.11, 2.12 and 2.13). The figures show that the deposit extends laterally for about 950m in the NNE - SSW direction with an average width of about 120m. Based on geophysical (VES) and borehole data, the shape of the deposit has been approximated to that of an inverted triangularprism with a rectangular top model (fig. 4.2). It has a variable central axial thickness with an average of about 61m. The minimum ore reserve of the deposit was consequently calculated to be about 9.74 mi11ion tonnes. The VES results indicate four geoelectric layers with resistivities of 250 to 2000 Ohm - m for the firsl layer, 25 Lo 60 Ohm - m for the second layer, 65 to 96 Ohm - m for the third and 1950 to 4000 Ohm - m for the fourth layer. The Third layer is replaced in some regions by a geoelectric unit with resistivity of 105 to 130 Ohm - m. - vi i - The results show a thickness varying from 0.4 to 0.9 for the first layer, 2 to 20m for the second layer, 10 to 46m for the third layer. The other geoelectric unit which replaced the third layer in some regions has a thickness varying between 39.5 and 102m, while the fourth layer is of infinite thickness. These results are in agreement with those deduced from borehole data from the area. The first two geoelectric layers constitute the overburden whose thickness varies between 0 and 25m within the project area. The total volume of the overburden overlying the deposit is estimated to be about 0.137 x 106 m3.The region bounding the deposit to the north has comparatively lower apparent resistivity values (18 - 60 Ohm - m) than the region bounding it to the south (with apparent resistivity values of 100 to 400 Ohm - mV Using the results of the investigations, comparatively weak zones have been identified and some per-mining and hydro-geological conditions of the deposit have been highlighted | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/1103 | |
| dc.language.iso | en | en_US |
| dc.subject | COMPOSITE, | en_US |
| dc.subject | GEOPHYSICAL, | en_US |
| dc.subject | INVESTIGATION, | en_US |
| dc.subject | BURUM, | en_US |
| dc.subject | DOLOMITIC, | en_US |
| dc.subject | MARBLE, | en_US |
| dc.subject | DEPOSIT, | en_US |
| dc.subject | FEDERAL CAPITAI, | en_US |
| dc.subject | TERRITORY, | en_US |
| dc.subject | NIGERIA | en_US |
| dc.title | A COMPOSITE GEOPHYSICAL INVESTIGATION OF BURUM DOLOMITIC MARBLE DEPOSIT, FEDERAL CAPITAI TERRITORY, NIGERIA | en_US |
| dc.type | Thesis | en_US |