TY - JOUR
T1 - Mesothermal gold prospectivity mapping of the southern Kibi-Winneba belt of Ghana based on Fuzzy analytical hierarchy process, concentration-area (C-A) fractal model and prediction-area (P-A) plot
AU - Forson, Eric Dominic
AU - Menyeh, Aboagye
AU - Wemegah, David Dotse
AU - Danuor, Sylvester K.
AU - Adjovu, Isaac
AU - Appiah, Isaac
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/3
Y1 - 2020/3
N2 - In this paper, the southern Kibi-Winneba belt, which shares geological resemblance with the renowned Ashanti belt in Ghana has been investigated to delineate prospective zones of gold mineralization occurrences. The generation of a mineral prospectivity map (MPM) for the study area comprised the integration of nine (9) exploration layers obtained from geological, remote sensing and geophysical datasets based on the Fuzzy analytical hierarchy process (FAHP) approach and geographical information systems (GIS). The employability of the FAHP in the assignment of weight to the nine (9) evidential layers based on their comparative importance with respect to the mineral being sought (which is gold in this study) was carried out by experts in remote sensing and geophysical techniques for mineral exploration. The weights of the evidential layers were subsequently normalized and integrated to produce an MPM of gold deposits within the study area based on a fuzzy operator of γ = 0.9 in GIS. For an elaborate evaluation of the MPM, the concentration-area (C-A) fractal model was employed to classify the generated MPM to obtain 6 thresholds for the generation of a final MPM for the study area. Further evaluation of the MPM was carried out by the prediction-area (P-A) plot based on 15 locations of known gold occurrences, with results obtained predicting that 25% of the study area as prospective regions of gold deposits, within which 75% of the known gold occurrences have been delineated.
AB - In this paper, the southern Kibi-Winneba belt, which shares geological resemblance with the renowned Ashanti belt in Ghana has been investigated to delineate prospective zones of gold mineralization occurrences. The generation of a mineral prospectivity map (MPM) for the study area comprised the integration of nine (9) exploration layers obtained from geological, remote sensing and geophysical datasets based on the Fuzzy analytical hierarchy process (FAHP) approach and geographical information systems (GIS). The employability of the FAHP in the assignment of weight to the nine (9) evidential layers based on their comparative importance with respect to the mineral being sought (which is gold in this study) was carried out by experts in remote sensing and geophysical techniques for mineral exploration. The weights of the evidential layers were subsequently normalized and integrated to produce an MPM of gold deposits within the study area based on a fuzzy operator of γ = 0.9 in GIS. For an elaborate evaluation of the MPM, the concentration-area (C-A) fractal model was employed to classify the generated MPM to obtain 6 thresholds for the generation of a final MPM for the study area. Further evaluation of the MPM was carried out by the prediction-area (P-A) plot based on 15 locations of known gold occurrences, with results obtained predicting that 25% of the study area as prospective regions of gold deposits, within which 75% of the known gold occurrences have been delineated.
KW - Concentration-area fractal model
KW - Fuzzy analytical hierarchy process
KW - Mineral prospectivity mapping
KW - Prediction-area plot Geophysics
KW - Remote Sensing
KW - Southern Kibi-Winneba belt
UR - http://www.scopus.com/inward/record.url?scp=85080102160&partnerID=8YFLogxK
U2 - 10.1016/j.jappgeo.2020.103971
DO - 10.1016/j.jappgeo.2020.103971
M3 - Article
AN - SCOPUS:85080102160
SN - 0926-9851
VL - 174
JO - Journal of Applied Geophysics
JF - Journal of Applied Geophysics
M1 - 103971
ER -