Exploitation in Alluvial Deposits

Objective
This type of this type of work is to make way for the small scale miners, students, weekend prospectors and everyone to be able to become acquainted with auriferous mining activities that are done and about the basic knowledge of alluvial gold deposits during the stages of exploration, exploitation and concentration; having an effect, fundamentally in the mining system that is more adequate and convincing for the types of deposits that can be found in certain areas. 

Origins of alluvial gold deposits
Metallic gold can be found in alluviums and comes from primary gold pockets of rocks that are in auriferous veins. For those that are looking for gold pockets will need to prepare themselves for a good amount of hard work and a lot of panning in order to locate them. In many cases individuals are simply not able to find gold because the right kind of research has not been done on the subject. The setback is also that when individuals do the research and study up on it often times they find the things that were stated in certain places or books or sites etc, did not necessarily apply to the type of stream these people have available. keep in mind that it is not possible to state for sure that just because a deposit of gold was located under a rock that all these types of rocks will have a deposit of gold under them in a stream that is known to be gold bearing and people that have been doing this type of work for a long time will all tell you the same thing. Just because nothing is found it does not mean that there will not be any in that area. In a lot of cases, individuals prospect areas that should not have been prospected to begin with. This is for the most part due to a failure of comprehending the basic concepts of nature.

Simply bear in mind that in order to be able to find out where gold could be concentrated in a placer, the primary and most important thing to learn is how the action of the stream influences as well as how the water flows. This is highly recommended due to the fact that the flow of water and gases needs to be understood to be successful. Approximately all the practical rules and mathematics have been created by different tests and comparisons of liquids that have been made. For instance, whenever water is restricted in a container that is closed and is not in movement, there are certain principles of science that have power over its action and these can be predicted. When water is not in movement there is no problem with it, on the other hand when it begins to flow this is when the predicament begins. In channel-like canals that are closed, the flow can also be foreseen in a safe way and precisely. On the other hand when water starts to flow in channels that are wide open such as in the case of streams it causes there to be a great amount of variables and only sweeping statements can be made. To add to the complexity of this process, streams can have more than just one principle of science working within a few yards of another. Remember that before any mineral can be carried or concentrated by a stream it needs to enter the stream somewhere upstream from where it is then concentrated and there has to be enough for it to concentrate. The area that the gold comes from is called the original source and these sources usually consist of veins, mineralised zones in bedrock, as well as permanent placers or preserved placers that were formed in the past.

The original source can be at a distance from one or both sides of the stream and it can also consist of an exposed vein in the bedrock of a stream. The original source is in many cases a deposit that has a little amount of gold that is not convenient to waste time on. There are many cases in which the source has less than one milligram of gold per ton in it. However, when a long period of time goes by, natural weathering breaks up the rock and releases the gold, which is then carried to the stream. Even though there are diverse methods in which this can occur, the most known of and most significant is runoff, which is the occurrence that takes place when the soil becomes saturated with more water than it is able to tolerate and it begins to move across the top or surface. There is also another form of runoff that is called ground runoff and this has to do with the water that gets to the stream through leakage. This seepage or leakage carries almost no sediment to the stream even though it sometimes moves some material through solution.