Areas where Alluvial Gold Deposits have been Found

It has been known that there are certain areas in the Andes that have auriferous gold and a number of quartz veinlets with auriferous content which after having eroded due to variable agents, amongst them the fluvial glacier deposits have given place to the formation of gold placers. According to studies made, in the disintegrated minerals of the geological layers that they belonged to due to atmospheric agents, they first produce dilation and contractions and then the cracking that separates them into smaller fragments. After this, the means of transport, such as the wind and fundamentally the rain, go dragging towards the valleys the softened fragments of such, such as limestone, all being reduced to mud, clays, sand and vegetation; meanwhile the hard and resistant ones are reduced to clastic rocks. As a consequence, the water with its very powerful dragging power, of destruction on one end and construction on the other, has taken most of it to the formation of the fluvial alluvial deposits, producing in this way the mechanic concentration, based mainly in the differences of specific weight, size and shape of the particles, depending on how affected they are by the speed of the water in movement and these factors act together to carry out the separation of fine and light minerals from the heavy and bigger ones.