Interpretation Geophysics

It provides integrated geophysical interpretation and research on a region by region in order to support mineral exploration for the mining sector in Namibia. In addition, it provides complementary interpretation services to airborne geophysics.

Magnetics

Airborne magnetics has been a crucial tool in the //Karas integrated Interpretation of high-resolution airborne geophysical data. Preliminary results has identified unique units, dykes, fault zones, lineaments and other geophysical features, which could not be mapped during ground geological mapping. The //Karas Report will soon be finalized and made available at our MME library for the public. Thereafter, similar work will be done to other regions throughout the entire country.

Electromagnetic

An airborne electromagnetic interpretation workshop was conducted by Fugro Airborne Surveys on the Eiseb project (Area 2 and 3) early this year. The integrated interpretation was mainly on the Tempest AEM and Regional magnetic data. However, a comprehensive report on the interpretation was never delivered but various deliveries of grids plus power presentations on the workshop were received

Results of Area 2 and 3 that formed part of the AEM interpretation.

Magnetotelluric

A Magnetotelluric survey was conducted by Southern African MagnetoTelluric EXperiment (SAMTEX). The programme aimed to study the cratonic boundaries of Southern Africa and provide information about lithospheric strike directions and the resistivity distributions as well as possible locations of terrane boundaries.

(Left) Surfer-Classed- Post map of resistivity distribution and (Right) Sketch of a complete apparent resistivity pseudo-map, which shows a remarkable a-symmetric distribution of the low resistivity zones within the western syncline. Black crosses indicate the survey lines.

Resistivity Survey

A resistivity survey in the Tsumeb area was conducted as collaboration between the Geological Survey and the Federal Institute for Geosciences and Natural Resources (BGR, Germany). The aim was to establish and locate a new waste dumpsite for the town as the pre-existing site was leaching contaminates into the groundwater system.

Radiometric

High resolution Radiometric data has indicated capability of discriminating lithological units on a regional scale during the //Karas Interpretation. This however invites more research on mapping geological units in other parts of the country. When overlain on the regional geology map radiometric data has proven to be a significant mapping tool.