Introduction
The Department of Geological Survey Lesotho maps the geology of the country to produce robust interpretations of tectonic setting, crustal architecture and geological evolution. Department of Geological Survey is a division within the Ministry of Mining Lesotho. The Department collects, synthesizes, archives and disseminates geoscientific data to potential investors. This information provides the building blocks for the design of resource exploration programs in Lesotho. It is also critical in Government decision making, particularly on economic and land use issues. Reports and GIS information is obtainable at the Department free of charge. Geological maps are also available at a certain charge.
Geology
The geology of Lesotho is well documented on the published geological maps at scales of 1:50,000 and 1:100,000. A general map of the whole country is available in two sheets at a scale of 1:250,000. The department of Geological Survey is continually in the process of digitizing all the country’s geological maps. Lesotho has a geological record extending from 250 Ma terrestrial sedimentary successions of the Karoo Super group to recent unconsolidated sediments mainly found in the lowlands.
Geological icons
3, 482m high Thabana-Ntlenyana peak
2 square kilometre Thaba-bosiu plateau and Qiloane pinnacle in Maseru
192 metre-high Maletsunyane waterfall in Semonkong
Mineral Exploration
The Department of Geological Survey Lesotho promotes investment in resources sector by:
Improving the exploration industry understanding of the geology of Lesotho
Providing geoscientific data to potential investors
Helping reduce exploration risk
Improving exploration efficiency
There is a high concentration of Kimberlite intrusions in the Northern Lesotho. The department has identified 405 Kimberlite bodies made up of 39 pipes, 343 dykes and 23 blows (dyke enlargements). Prospects of other mineral deposits identified include base metals, clays, dimension stone, sand and gravel, and Uranium. There are reserves of bituminous shale and coal in several areas of the country.
Geological Advice
Department of Geological Survey of Lesotho provides geological advice to exploration companies actively involved or interested in prospecting Lesotho on the following legislation:
Mines and Minerals Act No. 4 of 2005
The legislation requires mineral explorers to report quarterly on their work programs. The department also gives advice on applications for prospecting licences.
Projects
The role of the Department of Geological Survey of Lesotho is to create and maintain an up-to-date geological framework and an archive of the country mineral resources. The aim is to attract investment in exploration and to advice on land use. Engaging in collaboration projects allows Department of Geological Survey to:
Leverage valuable exploration funds
Gain access to new technology and infrastructure
Gain access to new exploration techniques and knowledge
Add value to data interpretations and enhancements
Maintain a competitive edge in investment attraction
The current major DGS collaborative projects:
Geochemical Mapping Project
JOGMEC Satellite Image analysis and Remote Sensing Project