placer mining encyclopedia

placer iron mining method « BINQ Mining

Placer mining – Wikipedia, the free encyclopedia. Placer mining is frequently used for precious metal deposits (particularly gold) and … Hydraulic mining methods such as hushing were used widely by the Romans …. Lifter bars, sometimes in the form of bolted in …

Ah Hee Diggings (Chinese Walls) - The Oregon Encyclopedia

Mar 17, 2018· The Ah Hee Diggings, also called the Chinese Walls, are sixty acres of hand-stacked, winding rock walls constructed of placer mine tailings. The walls were built by Chinese miners who worked gold-mining claims for the Ah Hee Placer Mining Company along a five-mile stretch of Granite Creek from 1867 to 1891.

Placer miner | Article about placer miner by The Free ...

The first author is particularly grateful to placer miners Bernie and Ron Johnson (Dawson City) for bringing to his attention the significant finds at their 1987-1988 operation on Nugget Gulch, and for donating important Pleistocene bones from this and other sites on Eldorado Creek to the Canadian Museum of Nature, as well as for their great hospitality.

Placer mining — Wikipedia Republished // WIKI 2

Placer mining (/ ˈ p l æ s ər / or / ˈ p l eɪ s ər /) is the mining of stream bed deposits for minerals. This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunnelling equipment.

What are the main methods of mining? | American ...

Placer mining is used to sift out valuable metals from sediments in river channels, beach sands, or other environments. In-situ mining, which is primarily used in mining uranium, involves dissolving the mineral resource in place then processing it at the surface without moving rock from the ground.

Placer mining : definition of Placer mining and synonyms ...

Placer mining ( / ˈ p l æ s ər / or / ˈ p l eɪ s ər /) [1] is the mining of alluvial deposits for minerals.This may be done by open-pit (also called open-cast mining) or by various surface excavating equipment or tunneling equipment.. The name is sometimes said to derive from Spanish placer, meaning "to please," (pleasure) because it is easy mining as compared with others.

Barringer Gold Mine - North Carolina History Project

Historians claim the opening of Barringer Gold Mine was a watershed event. Formerly one of the most important gold mines in 1800s North Carolina, the Barringer Gold Mine is remembered now mostly for being the first gold mine in the Southern Piedmont to use lode mining (pure mining …

Mining | ONE - Online Nevada Encyclopedia

Placer miners moved from one place to the next. They used inexpensive, movable wooden boxes called rockers and long toms to wash sand away from gold. The gold pan, a cliché of placer mining, had a limited capacity and was only for sampling sites during prospecting.

Placer mining | definition of placer mining by Medical ...

POM is a mining operation owning a production interest in certain placer mining claims containing gold, silver and other precious metals in addition to rare earth elements located approximately 80 kilometers northeast of Vancouver in the lower Lillooet River Valley.

Surface Mining Methods and Equipment

UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol. II - Surface Mining Methods and Equipment - J. Yamatomi and S. Okubo ©Encyclopedia of Life Support Systems (EOLSS) SURFACE MINING METHODS AND EQUIPMENT J. Yamatomi and S. Okubo University of Tokyo, Japan Keywords: Mining method, surface mining, open pit mining, open cast mining, placer mining, solution mining…

Mining Facts for Kids

Mining techniques can be divided into two common excavation types: surface mining and sub-surface (underground) mining.Today, surface mining is much more common, and produces, for example, 85% of minerals (excluding petroleum and natural gas) in the United States, including 98% of metallic ores.

Placer mining - The Full Wiki

Placer mining continues in many areas of the world as a source of diamonds, industrial minerals and metals, gems (in Myanmar and Sri Lanka), platinum, and of gold (in the Yukon, Alaska and British Columbia). Methods. The simplest technique to extract gold from placer ore is panning.

placer mineral processing encyclopedia

placer mineral processing encyclopedia placer mineral processing encyclopedia Placer mining . Britannica . Placer mining, ancient method of using water to excavate, transport, concentrate, and recover heavy minerals from alluvial or placer deposits.

Mining - Placer mining | Britannica.com

Mining - Mining - Placer mining: Placers are unconsolidated deposits of detrital material containing valuable minerals. The natural processes by which they form range from chemical weathering to stream, marine, and wind action. Typical minerals recovered in placers are gold, tin, platinum, diamonds, titaniferous and ferrous iron sands, gemstones (rubies, emeralds, and sapphires), and abrasives ...

Mining | Encyclopedia Wikia | FANDOM powered by Wikia

Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an orebody, lode, vein, seam, reef or placer deposit. Since the beginning of civilization, people have used stone, ceramics and, later, metals found close to the Earth's surface. These were...

Mining | The Canadian Encyclopedia

Placer gold deposits in Québec and Nova Scotia stimulated important new mining laws, and massive gold rushes to the Fraser Canyon in British Columbia (1858) and the Klondike in the Yukon (1896) led directly to the extension of colonial and, eventually, Canadian authority over these regions.

Kids.Net.Au - Encyclopedia > Mining

Mining is the extraction of valuable materials from a naturally available source.. Common materials extracted are: bauxite (for aluminum) coal, copper, diamonds, iron (from the ores haematite and limonite), gold, nickel, salt, silver, tin, uranium.. Techniques include: Hard rock mining; Open pit mining

Mining - Simple English Wikipedia, the free encyclopedia

This is called underground mining. Some mining, such as gold mining, is done in other ways. Gold can be mined by searching in the bed of a river or other stream of water to remove the flakes of gold. This is called panning or placer mining. A worker in a mine is called a miner. Underground mining is a dangerous job. Many mines have accidents ...

mining | Infoplease

mining, extraction of solid mineral resources from the earth. These resources include ores, which contain commercially valuable amounts of metals, such as iron and aluminum; precious stones, such as diamonds; building stones, such as granite; and solid fuels, such as coal and oil shale.

Placer mining | Britannica.com

Placer mining, ancient method of using water to excavate, transport, concentrate, and recover heavy minerals from alluvial or placer deposits. Examples of deposits mined by means of this technique are the gold-bearing sands and gravel that settle out from rapidly moving streams and rivers at points

Gold rush Facts for Kids - Kiddle encyclopedia

A gold rush is when a lot of miners go to a mining place full of gold.Well-known examples are the California Gold Rush of 1849, Klondike Gold Rush in the 1890s, and the Australian gold rush which began in 1851.. While gold mining itself didn't make much money for most diggers and mine owners, some people made large fortunes.

Placer Mining | ONE - Online Nevada Encyclopedia

Placer miners moved from one place to the next. They used inexpensive, movable wooden boxes called rockers and long toms to wash sand away from gold. The gold pan, a cliché of placer mining, had a limited capacity and was only for sampling sites during prospecting.

Placer mining - Wikipedia

Placer mining Placer deposits are collections of some mineral existing in discrete particles, mixed with sand, gravel, and other forms of eroded rock. Some of the minerals most commonly found in placer deposits are diamond, gold, platinum, magnetite, rutile, monazite, and cassiterite. These deposits are formed by the action of wind, water, and chemical changes on more massive beds of the mineral.

A Brief History of the Bozeman Trail | WyoHistory.org

Nov 20, 2014· Born in 1835 in Pickens County, Ga., Bozeman grew up at the foot of the Blue Ridge Mountains where placer mining was common. Believing that gold was the hope for a brighter future, his father left his home, wife and five children for the California goldfields in 1849.