quartz mining
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quartz mining — noun : the mining of gold on veins or ore bodies in place as distinguished from surface digging or washing : underground mining in rock compare placer mining … Useful english dictionary
Quartz reef mining — Primary gold typically occurs in quartz veins. The extraction of gold ore from these hard quartz veins was historically referred to as quartz reef mining.A Prussian engineer, Jacob Brache was the first to think that quartz reefs might have even… … Wikipedia
Mining industry of Angola — Mining in Angola is an activity with great economic potential since the country has one of the largest and most diversified mining resources of Africa. Angola is the third largest producer of diamonds in Africa and has only explored 40% of the… … Wikipedia
Mining in Pakistan — Mining is an important industry in Pakistan. Pakistan has deposits of several minerals including coal, copper, gold, chromite, mineral salt, bauxite and several other mierals. There are also a variety of precious and semi precious minerals that… … Wikipedia
Mining in Egypt — has had a long history that goes back to predynastic times. Egypt has substantial mineral resources, including 48 million tons of tantalite (fourth largest in the world), 50 million tons of coal, and an estimated 6.7 million ounces of gold in the … Wikipedia
Mining in Austria — is an industry on the decline. After a period of postwar expansion, mineral production has stagnated in recent decades, and metals mining continues to decline, because of high operating costs, increased foreign competition, low ore grades, and… … Wikipedia
Quartz diorite — is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture. Feldspar is present as plagioclase (typically oligoclase or andesine) with 10% or less potassium feldspar. Quartz is present at between 5 to 20% of the rock … Wikipedia
Mining in Argentina — is an important regional producer of minerals, including primary aluminum, lead, copper, zinc, silver and gold. In 2003 the value of nonfuel mineral production totaled $1.1 billion, of which copper concentrate alone accounted for $467 million.… … Wikipedia
Mining in Angola — Angola is the third largest producer of diamonds in Africa and has only explored 40% of the diamond rich territory within the country, but has had difficulty in attracting foreign investment because of corruption, human rights violations, and… … Wikipedia
Quartz — This article is about the mineral. For other uses, see Quartz (disambiguation). Quartz Quartz crystal cluster from Tibet General Category … Wikipedia
