placer mining encyclopedia

Panning mining Encyclopedia Britannica. Panning, in mining, simple method of separating particles of greater specific gravity (especially g) from soil or gravels by washing in a pan with water.Panning is one of the principal techniques of the individual prospector for recovering g and diamonds in placer (alluvial) deposits..

Minerals and Mining | Encyclopedia.com

Placer Dome Inc, Placer Dome Inc. Box 49330 Bentall Postal Station Suite 1600,1055 Dunsmuir St. Vancouver, British Columbia Canada V7X 1P1 (604) 682-7082 Fax: (604) 6… Metallurgy and Mining: Terms and Concepts, mine1 / mīn/ • possessive pron. used to refer to a thing or things belonging to or associated with the speaker: you go your way ...

ENVIRONMENTAL EFFECTS OF PLACER MINING - Encyclopedia …

Placer mining [1] / ˈplæsər / [2] is the mining of stream bed ( 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. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often ...

Placer Dome - Wikipedia

Placer Dome Inc. was a large mining company specializing in gold and other precious metals, with corporate headquarters in Vancouver, British Columbia, Canada. In August 2005, the company had interests in 16 gold mining operations in 7 countries; it had a market capitalization of $6.7 billion USD (on June 30, 2005). For the year 2004, it had sales of $1,888 million, net …

The Encyclopedia of Placer Mining | Wide World Maps & MORE!

The Encyclopedia of Placer Mining. $ 138.00 Quantity. Add to Cart. The Encyclopedia of Placer Mining jlw-phx.encycloPlacerMining. Share this Product. Share 0 Tweet Pin it 0 Fancy +1. Latest News. The New Digital Gift Cards from Wide World Maps & MORE! The Map Wizard has done it again! ...

Placer Mining | Encyclopedia.com

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 …

Placer mining - Academic Kids

Placer mining (pronounced "plass-er") is a open-pit or open-cast form of mining by which certain valuable minerals are extracted from the earth without tunneling. Excavation …

Placer mining -

Immediately download the Placer mining summary, chapter-by-chapter analysis, book notes, essays, quotes, character descriptions, lesson plans, and more - everything you need for studying or teaching Placer mining. ... Encyclopedia Articles (1) Placer Mining 717 words, approx. 3 …

What Is Placer Mining? | An Underground Miner

An Underground Miner. in Surface Mining / Placer Mining Posted on. 27/07/2022 15:31. Placer mining is a way to separate various mining materials. Placer mining differs from other methods and mining operations like hardrock mining. For example, people use hardrock mining to extract the veins of sought-after materials from solid rocks.

placer gold encyclopedia

Placer gold Article about Placer gold by The Free Dictionary. In the early 1850s prospectors had searched the valleys on the eastern side of the Sierras and found small quantities of placer gold.Not till 1859, however, were the surface outcroppings of the Comstock Lode discovered in Nevada--one of the world's mineral treasure stores, which at its best yielded $20,000,000 …

Placer mining - Wikipedia

Placer mining - Wikipedia

Alluvial placer deposits - «Mining Encyclopedia»

The useful minerals of the greatest density (1.5-2.1 • 10^4 kilograms per cubic metre), namely, the osmiridium, glandular platinum, gold, are concentrated in the near-bedrock part of the alluvium, sometimes penetrating through the fractures into the bedrock down to the depth of 1-1.5 metres, and form the placer deposits with the thickness ...

placer mining | Britannica

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 …

Placer mining - Wikipedia

Placer mining / ˈ p l æ 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 tunneling equipment.. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits—deposits of sand and …

Placer mining - Academic Kids

Placer mining (pronounced "plass-er") is a open-pit or open-cast form of mining by which certain valuable minerals are extracted from the earth without tunneling. Excavation is accomplished using water pressure (hydraulic mining) or surface excavating equipment.. The name derives from Spanish, placer, meaning "sand bank" and refers to precious metal …

The Encyclopedia of placer mining (1983 edition) | Open Library

The Encyclopedia of placer mining by, 1983, Inter Resources Publications edition, in English

placer mining encyclopedia

Placer mining | Britannica - Encyclopedia Britannica. · 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 .

What Is Placer Mining? The Technique Is Utilized on 'Gold Rush'

Unlike the other more common form of mining, hard rock mining, which consists of extracting precious metals from solid rock, placer mining focuses on loose sediment: sand or gravel. During the 1848 California Gold Rush, gold was discovered in Alaska and the Canadian Klondike, and that drew countless miners (with their prospecting pans) to the area.

The Encyclopedia of placer mining (1983 edition) | Open …

The Encyclopedia of placer mining by, 1983, Inter Resources Publications edition, in English

What is Placer Gold Mining? - Yukon - National Park Service

The word placer is thought to have come from Catalan and Spanish, meaning a shoal or sand bar. The word entered the American vocabulary during the 1848 California Gold Rush, and when gold was …

placer gold encyclopedia

placer gold encyclopedia Placer gold Article about Placer gold by The Free Dictionary In the early 1850s prospectors had searched the valleys on the eastern side of the Sierras and found small quantities of placer gold.Not till 1859, however, were the surface outcroppings ... Jaw crusher is widely used in various materials processing of mining ...

Placer mining | Article about placer mining by The Free Dictionary

Strip mining (see coal mining), open-pit (or open-cut) mining, and quarrying are the most common mining methods that start from the earth's surface and maintain exposure to the surface throughout the extraction period. The excavation usually has stepped, or benched, side slopes and can reach depths as low as 1,500 ft (460 m). In strip mining, the soft overburden, or …

Popular Mining Encyclopedia Volume 5 Placer Gold Silver

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What is Placer Gold Mining? - Yukon - National Park Service

The word placer is thought to have come from Catalan and Spanish, meaning a shoal or sand bar. The word entered the American vocabulary during the 1848 California Gold Rush, and when gold was discovered in Alaska and the Canadian Klondike in the late 1890s, the gold-seekers who rushed northward brought with them various placer mining technologies.

Placer mining - sawadee.wiki

Placer mining / ˈ p l æ 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 tunneling equipment.. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits—deposits of sand and …

Placer miner | Article about placer miner by The Free Dictionary

Strip mining (see coal mining), open-pit (or open-cut) mining, and quarrying are the most common mining methods that start from the earth's surface and maintain exposure to the surface throughout the extraction period. The excavation usually has stepped, or benched, side slopes and can reach depths as low as 1,500 ft (460 m). In strip mining, the soft overburden, or …

Montrose Placer Mining Company | Colorado Encyclopedia

The hanging flume is a three-sided, six-foot-wide and four-foot-deep wooden trough that is suspended for ten miles along sandstone walls 150 feet or more above the San Miguel and Dolores Rivers. During late nineteenth-century gold rushes, many Western mining companies built flumes to get water to...

Mining | Encyclopedia.com

Mining can occur either at Earth's surface in strip mines or open pit mines, or beneath the surface in underground mines. The method used depends on the depth, lateral extent, and economic value of the rock being mined. The deepest underground mine on Earth, which is 2.4 mi (3.8 km) deep, is a South African gold mine.

Placer deposit - Wikipedia

In geology, a placer deposit or placer is an accumulation of valuable minerals formed by gravity separation from a specific source rock during sedimentary processes. The name is from the Spanish word placer, meaning "alluvial sand". 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 …

Placer mining - Academic Kids

Placer mining (pronounced "plass-er") is a open-pit or open-cast form of mining by which certain valuable minerals are extracted from the earth without tunneling. Excavation is accomplished using water pressure (hydraulic mining) or surface excavating equipment.. The name derives from Spanish, placer, meaning "sand bank" and refers to precious metal deposits (particularly …

Placer Mining | Encyclopedia.com

With few exceptions, the mining of placer deposits is carried out by traditional surface (compared to underground) mining. Four general methods are in use. The oldest and perhaps most familiar to the general public is the hand method. Placerville, California, commemorates by its name the type of mining that was done during the Gold Rush of 1849.

Placer Mining | Encyclopedia.com

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 …

placer mining | Infoplease

placer mining: see mining. ... Infoplease is a reference and learning site, combining the contents of an encyclopedia, a dictionary, an atlas and several almanacs loaded with facts. Our editors update and regularly refine this enormous body of …

Placer mining | definition of placer mining by Medical dictionary

mining. (mi'ning) [ME] 1. The extraction of useful information from a database. Synonym: data mining. 2. The extraction from the earth of materials with industrial value, such as coal, silver, or gold. Miners are exposed to various occupational disorders, including respiratory diseases (e.g., pneumoconiosis), allergies, and traumatic injuries.

Popular Mining Encyclopedia Volume 2 Placer Gold Silver

MiningBooks.com - Your one-stop source for new, rare and out-of-print information on the mining and mineral industry. Buy today.

placer mining encyclopedia

Placer Mining | Encyclopedia. · 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. ...