Sample Preparation

After the receiving of the sample of the mining, weighing approximately 2,000 kilograms some samples of the rock were initially selected for petrographic studies.

After, the sample was ground in a mill of primary mandibles and, afterwards, in a secondary mandible mill leaving with granulometry under 6.35 mm. (1/4”).

Immediately, a homogenous pile was made from which 500 kilograms were removed to proceed with the studies.

Thus, the mineral was ground in ten nets and homogenized in a homogenary machine in V, making immediately a new pile from which approximately 80 kilograms were removed which were ground to 28 nets and homogenized, afterwards making a new pile which was reduced until reaching three representative samples, with approximately 1 kilogram each one, which were sent for their chemical analysis.

20 more kilograms were removed from the pile of the mineral with granulometry under 10 nets, and they made a new pile which was being reduced until obtaining a representative sample of a kilogram which was sent for mineralogical characterization.

The remaining of the mineral under 10 nets was again homogenized, a new pile was made and the samples of two kilograms each were removed, which served for the practices of benefits.

To obtain the representative results in the samples, proper care was taken of relating the weight and the granulometry of each aliquot removed for characterization and practices of benefitting, using statistic values applied to minerals of gold.

This procedure allowed to obtain good reproductivity according to the tenor of different aliquots.