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Another type of mining claim is a lode claim. A mining claim allows some security of tenure for the owner, providing an incentive to invest time and money developing the deposit. Mining claim laws vary from state to state, but claims staked over federal minerals follow federal mining law.
When Congress passed the General Mining Act of 1872, the wording was changed to "or other valuable deposits," giving greater scope to the law. The 1872 law was codified as 30 U.S.C. §§ 22-42 [14] The 1872 act also granted extralateral rights to lode claims, and fixed the maximum size of lode claims as 1500 feet (457m) long and 600 feet (183m ...
Placer mining (/ ˈ p l æ s ər /) [1] is the mining of stream bed deposits for minerals. [2] This may be done by open-pit mining or by various surface excavating equipment or tunneling equipment.
Targets are divided into two general categories of materials: placer deposits, consisting of valuable minerals contained within river gravels, beach sands, and other unconsolidated materials; and lode deposits, where valuable minerals are found in veins, in layers, or in mineral grains generally distributed throughout a mass of actual rock ...
Placer mining is an important source of gold, and was the main technique used in the early years of many gold rushes, including the California Gold Rush. Types of placer deposits include alluvium, eluvium, beach placers, aeolian placers and paleo-placers. [2] Placer materials must be both dense and resistant to weathering processes. To ...
Placer mining is a method of extracting gold from alluvial deposits such as sand, gravel, and sediment. [43] [44] These are known as placer deposits which are typically found in riverbeds, stream beds, and floodplains. [45] These deposits typically contain minerals that are resistant to weathering and eroision like gold, platinum, diamonds, and ...
A stringer lode is one in which the rock is so permeated by small veinlets that rather than mining the veins, the entire mass of ore and the enveined country rock is mined. It is so named because of the irregular branching of the veins into many anastomosis stringers, so that the ore is not separable from the country rock.
In 1898, placer and lode gold were discovered on several of the Kobuk River's tributaries. This gold strike (which by some accounts was false) attracted nearly 2,000 people to Alaska, though only 800 actually stayed to find gold. Although mining has continued to take place in this area, little gold has been discovered.