Regional gold potential mapping in Kelantan (Malaysia) using probabilistic based models and GIS

Abstract

Abstract:The aim of this study is to test and compare two probabilistic based models (frequency ratio and weightsof-evidence) with regard to regional gold potential mapping at Kelantan, Malaysia. Until now these models have not been used for the purpose of mapping gold potential areas in Malaysia. This study analyzed the spatial relationship between gold deposits and geological factors such as lithology, faults, geochemical and geophysical data in geographical information system (GIS) software. About eight (8) gold deposits and five (5) related factors are identified and quantified for their spatial relationships. Then, all factors were combined to generate a predictive gold potential map. The predictive maps were then validated by comparing them with known gold deposits using receiver operating characteristics (ROC) and "area under the curve" (AUC) graphs. The results of validation showed accuracies of 80% for the frequency ratio and 74% for the weightsof-evidence model, respectively. The results demonstrated the usefulness of frequency ratio and weights-of-evidence modeling techniques in mineral exploration work to discover unknown gold deposits in Kelantan, Malaysia.

Application of GIS and remote sensing in mineral exploration: current and future perspectives

“…The approach first obtained lithology and lineaments information from satellite images covering the area of study and later integrate and weight both information together with geochemical data such as counts of K (potassium), concentration of Pb (Lead) and concentration of Cu (copper) to produce the prospective map which highlight the mineral potential zones. Yusoff et al (2015) created a regional gold potential map of Kelantan. The study integrated and analysed a variety of geospatial information such as geological, geochemical and geophysical data sets using GIS-based integration method (frequency and WofE statistical method), to create a potential map highlighting areas of gold mineralisation.…”

A GIS-based modified frequency ratio model for gold potential mapping in Kelantan Malaysia

“…The study area occupies approximately 593km 2 . This region was selected because a similar study (Yusoff et al, 2015) had applied a different approach to produce a potential gold map of the area. The choice of the region allows comparison prediction accuracy between the current studies with previous research.…”

Evaluating the application of the statistical index method in flood susceptibility mapping and its comparison with frequency ratio and logistic regression methods

“…FR is one of the most cited BSA methods in natural hazard studies, such as flood mapping (Jothibasu and Anbazhagan 2016), landslide mapping (Li et al 2016), ground water mapping (Manap et al 2014), mineral potential mapping (Yusoff et al 2015), and soil erosion mapping (Khosrokhani and Pradhan 2014). Its popularity is related to its simple and rapid calculation process (Lee et al 2012).…”