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Gold Finding Methods
The high concentrations of big gold deposits in the rocks of the intermediate Precambrian age have already been distinguished. Many of these deposits can be found in rocks of, or those related to, greenstone granite association like those in the districts of Ontario and Quebec, Canada, as well as in Kolar, India; and Kalgoorlie Australia. It would be interesting to find out if the auriferous greenstone granite areas have any geochemical differences that would set them apart from the terrain that do not have any gold I them with otherwise very comparable formations of rock. Gold deposits occur in mountain ranges and are usually close to the surface and can be detected with many types of exploration tools available these days. However, what happens in the case of the deposits that without a doubt are in adjacent valleys under a thick cover of younger sediments? It is possible there will be new tools developed that will have the ability of detecting these? There is some newer technology currently being explored and used such as measuring the amount of mercury that can be found in the air that is more concentrated in the areas where there are ore deposits and this method is hoped to be useful. But what other types of methods can be used for the discovery of gold? There are diverse different factors and problems that interfere with gold finding and that have to do with the distribution of gold in the rocks. There is a good amount of information that can be found on the gold content of a lot of types of rock and minerals and in those of bedrock ore; however there are many blank spots that are still to be discovered and learned about. There are three different points to be looked into for instance, the first would have to be the amount of crust of 0.003 – 0.004 ppm; the second would have to be the content of gold in the lowest grade ore that are mined in these times and have an average grade of only around 0.04 ounces per ton and a porphyry copper deposits that brought about gold as a byproduct and finally there is the gold content of the ore that is being mined at gold mines all around the world. (This is at 0.3 – 0.5 ounces per ton). Is there any nice percentage of total gold in the areas of the earth where it can be found in concentrations right under the ones of porphyry copper gold and presently gold ore that can be mined, or is there an actual hole in the series of concentration between the two grades of ore instead of only in one that is created by the financial side of mining? A resulting question has to do with the gold distribution that is close to the deposits and other metals. Is gold mainly confined to the deposits themselves or does it little by little start to decrease away from the deposits? In other words doesn’t a rich concentrate usually bound to a gold bearing deposit? There are other unknown of things as far the occurrence of gold in minerals, especially in those that are made out of mafic rock, which is dark rocks that are highly concentrated in magnesium and iron, as well as the distribution of gold in porphyry copper deposits and the wall rocks of these.
