Gold exists in extremely dilute concentrations in both fresh water and seawater and is therefore technically present in all rivers. However, the concentration is very small, difficult to detect and its extraction is currently not feasible or economically profitable. All the rivers in the world contain gold. However, some rivers contain so little gold that you could search and sift for years and not find a single small flake.
The amateur searcher will not be able to determine if the gold is contained within a rock outcrop. Of course, there are exceptions to this rule. If there has been a recent storm or flood, for example, gold could spread all over the riverbed or even crawl to its banks. Sewer deposits, waste deposits, alluvial deposits, bank deposits and floodwaters are all places where gold can be found.
The term vein deposit refers to a crack or fissure in a hard rock that is filled with gold. The mineral Placer is derived from this source. When prospecting on a river, you'll want to look for fast- and slow-moving water. The curves of the river where gold can get trapped.
Gold is found when the flow of water is altered by obstacles such as rocks and logs or by the contours of watercourses, such as river curves. River gold mining is a type of placer mining and traditional mining that obtains gold from a placer deposit through the use of a tray. This method is usually reserved for areas where there is a lot of gold at the bottom of the river, since it is a very efficient way to extract gold. Illegal miners looking for gold often use mercury to separate gold from lighter materials, which can contaminate rivers and cause health problems for people who consume fish in affected waterways.
In the United States, areas such as South Carolina, North Carolina, the Trinity River in Texas and the South Yuba River in Southern California were also popular for gold mining and production. While river gold mining has a long history, it's still relatively common today to see a prospector searching for gold.