Menengai Caldera, Kenya

Name of project:
Geo-structural study of the Menengai Caldera
Country: Area of study:
Kenya Menengai Caldera
Customer:
ELC – Electroconsult (Baranzate, Milano, Italy)
Project objectives:
To carry out a geo-structural and geomorphological study, by remote sensing, in support to the exploration of geothermal resources in the Menengai Caldera area
Composition of the working group:
GEOMAP
Personnel involved:
1 geologist photointerpreter, 1 GIS and Remote Sensing expert
Number man/months:
4
Project steps:
In a first phase the acquisition and pre-processing of several remotely sensed imagery from Aster and Landsat sensors has been carried out, in order to make them geometrically coherent and suitable for photo-interpretation. Furthermore, a colour orthophoto, with a 0,4 m ground resolution, was provided by the Customer.
In a second phase, the photointerpretation of the above-mentioned images in a GIS environment has been performed, aimed at the extraction of the following themes: total field of lineations, drainage network and landform (with special attention to volcanic features). A DTM (Aster GDEM, generated by Aster images) and a vector topographic map have been used also, as ancillary data.
The total field of lineation has been subsequently processed and analysed: 1) to produce statistically aggregated data such as rose diagrams, used to represent the various trends of azimuthal orientation of linear features, both on the whole, and divided by category and geological units; 2) to generate maps of fracture density and nodal points (where two or more lineations cross), obtained by a particular methodology which uses a multicriterial analysis for the evaluation of linear features, by means of weighs related to several parameters, such as lithology, slope, stress field, etc.
The study has produced a final report and a series of maps at 1:30,000 scale for the whole study area and 1:15,000 scale for the area of the caldera: drainage network, geomorphology, geology, total field of lineations (with rose diagrams), density of lineations, density of nodal points
Start (year/month): End (year/month): Value of the project:
10/2012 12/2012