5. VALIDATION
The main directions of the lineaments from the Landsat 8 image, Radarsat
image and aeromagnetic image are four sets namely the directions
N080-N100, N030-050, N000-N020, N120-N135. Relative to the data acquired
in the field, we note the D1 deformation in the NS direction with
strongly dipping towards east. The S2 shearing foliation of the D2
deformation has a NNE-SSW orientation and a strong dip towards SE then
secondarily towards NW. These directions are respectively in phase with
the directions N000-N020 and N030-050 coming from the lineaments. The
quartz veins V2b associated with D2 deformation have a N070 -090
orientation and are in phase with the N080-N100 direction of the
lineaments.
In conclusion, all lineaments identified from Landat 8, Radarsat and
aeromagnetic images have been validated by field data except lineaments
N120-N135. On the regional level, the first deformation D1 on the ground
corresponds to the Eburnean deformation. The origin of the S1 foliation
is discussed. Could it be linked to peribatholitic deformations
[20]. On the ground, the S1 foliation transposes onto the S0
bedding. The S1 foliation is difficult to identify and is rarely
observed in the field. The D2 regional event corresponds to a NW-SE
shortening associated with the first major plutonic event which begins
around 2160 Ma and gives numerous granitoid intrusions (Baratoux, and
al., 2011), this corresponds to the S2 shearing foliation of the study
area. The final phase of deformation corresponds to diorite dykes in the
study area and is represented by D3. All these deformations have been
represented, and an anticline and a syncline are interpreted in the
study area.
The stereonet projections of these deformations shows that the dominant
dip of the deformations is towards the SE ( Figure 23 and 24) .