placer mining encyclopedia

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.

'It's An Environmental Law-Free Zone': B.C. Auditor ...

Apr 17, 2018· Placer mining kills fish, damages streams, poses a risk to drinking water and jeopardizes Indigenous rights, but the activity is virtually unregulated and brings little money into government coffers, says a report urging B.C. Auditor General Carol Bellringer to conduct an audit of the province's failure to adequately regulate placer operations.

Surface Mining Methods and Equipment

©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, leaching, stripping rati o, mining machinery, excavation, cutting, grading, loading, ditching Contents 1.

Placer mining | SpringerLink

Placer deposits are masses of gravel or other residual or detrital material that contain one or more valuable minerals that have been concentrated by weathering and mechanical processes. The concentrated minerals are, therefore, resistant to weathering and abrasion, and are typically of greater specific gravity, 3.3–22, than the most common minerals, which have specific gravities of about 2 ...

Placer mining - Academic Kids

May 15, 2005· 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 …

Mining Facts for Kids - Kids encyclopedia facts

Jul 16, 2021· Mining is the process of mining stuff out of the ground. Any material that cannot be grown must be mined. Mining things from the ground is called extraction.Mining can include extraction of metals and minerals, like coal, diamond, gold, silver, platinum, copper, tin and iron.Mining can also include other things like oil and natural gas.. Some mining is done by scraping away the soil (dirt ...

Understanding the Basics of Placer Mining Equipment - OreFlow

May 06, 2021· Placer mining is the process of recovering heavily eroded minerals (gold and other precious metals) from gravel or sand. Examples of deposits recovered through placer mining are the gold-bearing sands and gravel that settle out from rapidly moving rivers and streams.

Definitions of placer mining - OneLook Dictionary Search

placer mining: Encyclopedia [home, info] Quick definitions from WordNet (placer mining) noun: mining valuable minerals from a placer by washing or dredging Words similar to placer mining Usage examples for placer mining Words that often appear near placer mining

Placer mining - AccessScience from McGraw-Hill Education

Placer mining. Article By: Taylor, Danny L. Department of Mining and Mettalurgical Engineering, Mackay School of Earth Sciences and Engineering, University of ... MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology .

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 gravel in ...

Popular Mining Encyclopedia Volume 4 Placer Gold Silver | eBay

It was the How-To-Do-It magazine for the small miner. Popular Mining Encyclopedia.

mining - Placer mining - Encyclopedia Britannica

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 ...

Placer deposit | Project Gutenberg Self-Publishing ...

Placer deposit: | | ||| | |Black sand| concentrates | | |... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most ...

placer mining_placer mining

Placer mining ( or )Oxford English Dictionary 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 …

Gold Rush | New Georgia Encyclopedia

Jan 21, 2003· Mining continued on a limited scale until the turn of the twentieth century, when the advent of new mining technologies gave rise to a flurry of new activity. Several companies set up gold-processing plants, one of which, erected by the Dahlonega Consolidated Gold Mining Company on Yahoola Creek, was the largest ever built east of the ...

Systems of Mining - gold, mines, ore, steam, placer ...

Placer Mining.—Another class of open-pit mines is known as pla cers nr placer mines where gold bearing sands and gravels are mined for the gold which they contain. In the earliest stages of placer min ing the gravel was washed in pans, the gold collecting at the bottom, and saved as metallic gold.

Placer Gold Mining a Major Threat to Russia's Rivers

Jul 23, 2021· Until the late 1990s, thousands of small-time placer mining enterprises operated in northeastern China. Taiga streams and creeks in the Amur River basin were studded with dredges and other mining equipment. Then, between 1998 and 1999, several of the China's largest rivers experienced significant flooding. The blame went to placer gold miners ...

Mine (resource extraction) - encyclopedia article ...

Placer mining "Placer mining" is the name given to extracting valuable material that has already been removed from the ground, and gone through some natural sorting, through erosion caused by the natural flow of water. The sandbanks lining the courses of streams, downstream from outcroppings of metals like gold and copper often contain minute ...

Placer Mining | New Georgia Encyclopedia

Placer mining was popular among the early gold diggers because it required very little capital. The term refers to mining for gold that has washed down from the hillsides and collected along mountain streams. Courtesy of Harper's New Monthly Magazine. Trending Articles. Driving Miss Daisy.

(PDF) PLACERS AND PLACER MINING - ResearchGate

Placer mining is a special open cut method for exploiting deposits of sand or gravel containing workable amounts of such valuable minerals. Native gold is the most important placer mineral, but ...

Chris Ralph's Gold Prospecting Encyclopedia: Information ...

All About Placer Mining Placer nuggets are the goal of many prospectors. This section contains loads of information, including information about historic placer mining methods, large nuggets, how nuggets form, famous placer districts, and more. Miners Reference Pages Gold Mining can get a little technical, and it just seems to foster a lot of ...

Commercial Placer Gold Mining Equipment: Placer Mining and ...

Commercial placer mine operators can afford the expense, and need the capability of larger equipment that is beyond the typical workings of the small operator or individual prospector - this level of financial capacity is required to mine on a commercial scale.

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

placer mining: see miningmining, 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 ..... Click the link for more information. . The ...

Wikizero - Placer mining

Placer mining synonyms, placer mining antonyms ...

Synonyms for placer mining in Free Thesaurus. Antonyms for placer mining. 2 words related to placer mining: mining, excavation. What are synonyms for placer mining?

Gold Mining and its Environmental Impacts

PLACER MINING Placer mining was one the first methods used to extract gold from the lakes and streams surrounding the Sierra Nevada Mountains. This process uses the density of gold and the force of gravity to separate gold particles from other sedimentary deposits (Silva 1986). In the United States the majority of gold mined is from placer deposits

mining - Placer mining - Encyclopedia Britannica

Placer mining - 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 settle out from rapidly moving streams and rivers at points where the current slows down.

Gold Production in Alabama | Encyclopedia of Alabama

Aug 29, 2008· Gold Panning in Chilton County Many communities in east-central Alabama, though mainly in Tallapoosa, Randolph, and Coosa counties, credit their formation to the gold-mining operations that were established in the mid-nineteenth century. The town of Goldville in northern Tallapoosa was named for the main resource of the area. It was founded in 1842, and during the peak mining period …

43 CFR § 3832.21 - How do I locate a lode or placer mining ...

(a) Lode claims. (1) Your lode claim is not valid until you have made a discovery. (2) Locating a lode claim. You may locate a lode claim for a mineral that: (i) Occurs as veins, lodes, ledges, or other rock in place; (ii) Contains base and precious metals, gems and semi-precious stones, and certain industrial minerals, including but not limited to gold, silver, cinnabar, lead, tin, copper ...

Placer mining - definition of placer mining by The Free ...

Define placer mining. placer mining synonyms, placer mining pronunciation, placer mining translation, English dictionary definition of placer mining. n. The obtaining of minerals from placers by washing or dredging. placer miner n.

Placer Gold Mining - Total War Shogun 2 Encyclopedia

There is gold in this province and it is easily worked thanks to surface deposits. However, by investing in bigger and deeper mines, it is possible to greatly increase the wealth generated by this province. Gold is, of course, always welcome to any warlord because all wise commanders know that wars cannot be fought, let alone won, without wealth. Gold mining is a dirty and dangerous business ...

What Is Placer Mining? (with picture) - wiseGEEK

Emma G. Placer mining is commonly used to recover gold. Placer mining is a group of mining methods that use water to separate valuable minerals or ores from the surrounding sediment. It can be used to recover platinum, tin, and diamonds, but most commonly gold.A very crude form of placer mining was used by gold prospectors during the California gold rush in the mid 1800s.

(PDF) SURFACE MINING METHODS AND EQUIPMENT | …

Aqueous extraction includes: • Solution mining U Placer mining is intended for the recovery of heavy minerals from alluvial or placer deposits, using water to excavate, transport, and/or concentrate minerals. Solution mining is employed for extracting soluble or fusible minerals using water or a lixiviant. 1.2.

Deposits Gold Placer r t ) .. - USGS

a renewed interest in placer mining, and many individuals sought, and a few discovered, new placer areas throughout the State. The location of the placers described in this report is shown on plate 1. Very little factual information can be found about the early periods of placer mining in Nevada.

placer mining encyclopedia

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