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  • Reassessment of 1973 and 1980’s data.

  • Initial selection of targets based on historic data, covering range of geological settings and socio-economic considerations.

  • Satellite remote sensing data obtained from Landsat 7 and Aster.

  • Field reconnaissance and hydro-chemistry sampling all target groups covered by Agreement with Zambian Government. Including identification of geological setting, measurement of temperature and other fluid characteristics; collection of fluid sample.

  • Laboratory analysis of samples for dissolved metals, non-metals and isotopes. Results used to determine geothermometers and water classification.

  • At prospective targets, follow up geological mapping, geophysics, including ground magnetics, resistivity (MT and EM), radiometric, gravity and shallow
    soil temperature profiles.

  • Conceptual modelling and interpretation of Kafue Graben data to define initial drill targets related to sedimentary basin style geothermal systems.

  • Submission and approval of Environmental Impact Assessment for geothermal drilling. Base-line environmental study instigated January 2014.

  • Initial research and exploration drill programme Q3 2013 at Bwengwa River target within the Kafue Graben, to correlate geophysics with geology,
    obtain hydrochemistry samples and measure temperature gradient.

  • Geology, hydro chemistry, and down-well temperature profiles obtained post drilling currently being interpreted and remodelled; (Q2 2014). Update expected Q3 2014.

  • Intention to conduct further drill programme drilling from Q3 2014.

  • Geophysics programmes ongoing at secondary targets within the Kafue Graben.

  • Research programmes relating to other forms of geophysical survey and geo-botany ongoing.



The sedimentary basin geothermal model concept is of meteoric fluids circulating in deep faults within the crystalline rock basement complex below clay rich sediments (the Karoo sedimentary basin) heated by the geothermal gradient and trapped below the clays. This model suggests a significant number of Low-Enthalpy systems within Zambia, which could be utilized as an energy source for binary power plant configurations in which the geothermal fluid heats a low boiling point working fluid.

The objective is to locate and mine the heat from appropriate aquifers, which for indicative geothermometers of circa 160°C should not be too deep – perhaps 2,000m.

Based on current exploration results, the Company’s assessment is that “the Bwengwa River drill target has the characteristics of a realistic geothermal power target, which if proven to be a shallow, permeable, tabular reservoir could be relatively low cost to target and develop, using binary plant technology”.




Data Review:





Reassessment of 1974 Survey and 1980’s Italian-Zambian exploration and pilot power plant. 20 targets investigated across Zambia.

Measurement of conductivity, redox, pH, radiation and surface temperature. Hydrochemistry sampling for laboratory analysis of anions,
cations and isotopes. Results used to calculate geothermometers and determine water classification. (Bwengwa geothermometers >150OC)

Ground magnetic, radiometric, Magnetic susceptibility
Resistivity (Magnetotelluric and Vertical Electrical Soundings)
Shallow soil temperature profiles

Mapping and sampling

Conceptual modelling and interpretation of data to define initial drill targets at Bwengwa


Geothermal Target Areas 2013-2016


Geological Setting


Kalahari GeoEnergy Ltd is a member of the International Geothermal
Association. For further information on Geothermal Energy and power
production please see www.geothermal-energy.org


(+260) 0211 840 431
40 Jesmondine (Corner Central St & Mwambula Rd), Lusaka, ZAMBIA
Plot 1672, Hill Top, Monze, ZAMBIA
Unit D, 11th Floor, Ho Lee Building, 38-44 D’Aguilar St, Central, HONG KONG

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