Sampling

Sampling are techniques that serve to obtain samples that are representative of a deposit, and the results of these are utilized for the economic evaluation and the systematic evaluation of the deposit and which in some cases might be something looking into. The basis of an evaluation in a special auriferous project and also in any mining project is to obtain a sampling in a sector of the mine, while trying to obtain samples that correspond to those obtained in the study that was presented by the company. The miner is required to make a description of all the existing mining labors in the area of the deposit, incising on the geological characteristics of each one of them. Describe the current conditions of the existing labors, making a check of each one of them, locating them on a blueprint and indicating the corresponding accessibility. The sampling should be in concordance with the geo-mineralogical characteristics of the deposit. For example the sampling channels should be perpendicular to the direction of the vein, lode sampling, and porphyry etc.

Integral sampling method
This method consists of manually extracting separately all of the volume of the material in each differentiated horizon or by layers of 1.00 meters in thickness, classifying them in overload, superior or inferior gravel and the number of the sampling that belongs to each layer, in progressive function of the depth that is reached. This method is more recommendable even though it is very hard work, because it allows better support and confidence to the result of the sample, since it is more representative and real in volume. Besides this, with this data we can elaborate the geological column and the value of the alluvial deposit.

Channel sampling
Once one of the walls of the shaft has been set up as vertically as possible, a technique is then carried out to take the sample by this means, whose recommendable section is of 25 x 25 cm. by the variable potency of the shaft. The samples are extracted by layers that are made up of a lithologic horizon be it by the type of material, size of the particles in the gravel, coloration etc. Right after, the samples are panned depending on their precedence until they become reduced into concentrates to the respective counting of the number of gold particles and then register them according to the table of colours.