Abstract:
The presence of low sulphidation epithermal gold at is a part of the geological
process of the Sunda arc, Indonesia. This process encourages the formation of
mineralized zones very closely with rock fractures in the Honje Formation and
Cipacar Formation. This study describes the role of associated minerals (Ag, Cu,
Pb, Zn and As) in Au-Ag Mineralization using the T2 Hotellings method. To obtain
field data, namely surface mapping, this study analysed rock sampling for the
petrographic test of 17 samples, and drill assay data with drilling depth between
50-450 meters. Meanwhile, the lithological zones were studied by BRAN, VNBR
and VEIN and the multivariate normality test showed that the data were
multivariate normally distributed between gold (Au) content and associated mineral
content. The Multivariate Analysis of Variance average comparison test shows that
there is a significant difference between the main mineral content and associated
minerals in the lithology of BRAN, VEIN, and VNBR rocks. Minerals Ag, Cu, Pb,
Zn and As are significant to Au, although not all lithological zones are significant
because the values of the deterministic coefficient are different. Ag in each zone is
significant for Au while for Zn and As in each zone is insignificant. Based on the
arithmetic regression model on VNBR (Breccia Vein) with a small significance
value, it shows that Ag, Cu and Pb influence changes in the grade value of Au. The
implication of this research is to provide convenience for metal mineral exploration
activities in predicting the role of associated minerals (associated minerals) on the
main mineral content, especially for Low Sulphidation epithermal gold (Au).
