Prima M. HilmanHead of Information Division – Centre for Geological Resources

REPUBLIC OF INDONESIAMINISTRY OF ENERGY AND MINERAL RESOURCESGEOLOGICAL AGENCY

Geophysical

Prospectivity Maps

Prospectivity Maps

geology(1-of-n coded)

magnetic anomalygamma-ray channels total countdistance to nearest faultKThU

input layer hiddenlayer outputlayer

outputinternal biases = 1

Regional Mineral Exploration Data

GISGIS

AnalyseCombine AnalyseCombine

• Frequency Ratio • Weights of Evidence• Fuzzy Logic• Neural Networks

• Frequency Ratio • Weights of Evidence• Fuzzy Logic• Neural Networks

Geology

Geochemical

Remote Sensing

B∩DB∩D

B∩DB∩D

B∩DB∩DDD

B∩DB∩D

BB TT

T : Total areaD : Area of depositsB : Area of pattern

• Verification of frequency ratio model using testing mineralization points; the area ratio was 0.7868 and the prediction accuracy is 78.68%.

• Verification using processed mineralization points itself ; the area ratio was 0.9580 and the prediction accuracy is 95.80%.

40 precious-base metals mineralization, 25 points for processing and 15 points for test (verification)

• Verification of weight of evidence model using testing mineralization points; the area ratio was 0.6821 and the prediction accuracy is 68.21%.

• Verification using processed mineralization points itself ; the area ratio was 0.8038 and the prediction accuracy is 80.38%.

40 precious-base metals mineralization, 25 points for processing and 15 points for test (verification)

REPUBLIC OF INDONESIAMINISTRY OF ENERGY AND MINERAL RESOURCESGEOLOGICAL AGENCYhttp://www.bgl.esdm.go.id