MODELLING OF VEIN GOLD RESOURCES WITH METHOD OF INDICATOR KRIGING AND SEEQUENTIAL INDICATOR SIMULATION

• Main Author: Rivai Sitindaon, Samuel
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/56795
• Institution: Institut Teknologi Bandung

This study discusses an analysis of the gold veins resource modeling using the principle indicators, they are using Indicator Kriging (IK) and Sequential Indicator Simulation (SIS) from data assay of gold vein mineralization from Pongkor, West Java. The data used in this study is a data exploration drilling as many as 136 points. From the validation results indicate that relatively only a few data is available or has not been proportional to the volume of ore bodies, wide range (average 50 m to the north), and have some data outliers. Furthermore, the data is divided into deciles class with nine (9) cut off grades, then converted into the form of indicator data. Variogram modeling done with the data indicators for each cut off grades. Grade Estimation was conducted with IK using algorithm of FIK (Full Indicator Kriging) and MIK (Median Indicator Kriging). While simulation of grades conducted using SIS. Gold resource calculation is done using the search volume (R) of the average range indicator variogram. The cumulative distribution curve and the curve Grade-Tonnage for any cut off gradest displayed to validate the results of the estimation and simulation of composite data in the block. From these results it can be concluded that the method of IK with algoritm of FIK is the most suitabele.