Geological Mapping

Eighteen (18) geological Quarter Degree Sheets covering an approximate area of 54,000 km2 have been selected for geological mapping and maps will be published at a scale of 1:100,000. Out of these, there are 12 unmapped QDS and six (6) QDS will be up-dated from a scale of 1:125,000 to 1:100,000. In addition two blocks covering a total of 314,928 sq km will be compiled followed by field checks and maps published at scale of 1:500,000
Upgrading of Six geological QDSs (scale 1:100,000)
Acquisition of new data and information through field geological mapping, geophysical and geochemical surveys as well as updating existing geological maps. Six (6) QDSs covering an area of about 18,000 km2 have been selected for updating. They include QDSs 146, 147, 148 and 165 (Handeni and Kilindi) in Tanga region; QDS 228 and 229 (Lupa Goldfield in Mbeya region) (see figure 2). The scope of work to be undertaken include compilation of available data and information; field checks and map editing, data processing and interpretation; map preparation, publication and reporting.
Geological mapping of 12 QDSs (scale 1:100,000)
A total of 12 QDSs covering about 36,000 km2, will be mapped and compiled at a scale of 1:100,000. These include QDS 82, 83, 101, 102 (Singida-Iramba Sekenke); QDS 185 (Coastal region); QDS 178, 79 (Dodoma-Mafurungu); QDS 272, 273, 230 (Mbeya region); and QDS 263 (Ruvuma region). The work shall involve compilation of available data and information; field work; petrological and petrophysical studies; laboratory analysis and map preparation at a scale of 1:100,000.
Compilation of regional geological, geophysical and mineral potential block maps (scale 1:500,000)
This will entail compilation and synthesis of existing data and information; conducting geological and geophysical field checks in selected areas; laboratory analysis; data compilation and production of geophysical maps from the old airborne geophysical data archived at GST. Samples for geochronology age determination of rocks will be collected for the purpose of age correlation. Two blocks covering 324 km2 have been selected for compilation of regional geological, geophysical and mineral potential maps at the scale of 1:500,000. They include the Singida-Handeni corridor (Block A with 54 QDS sheets) and Mbeya-Songea corridor (Block B with 54 QDS sheets) as shown in figure 2. Twenty eight (28) QDSs are within the areas selected for the airborne geophysical survey in the Singida – Handeni corridor.


Fig.2: Proposed areas for undertaking Geological Mapping