hard rocks that contain gold

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What rock contains gold? | Yahoo Answers

Jun 19, 2013· Best Answer: Nearly all rocks contain trace amounts of gold Furthermore, gold mining technology has progressed to the point where nearly all the world's gold mines extract gold from rocks containing amounts just slightly above trace However, if you have to pick one, then igneous...

Extracting Gold from Rock - PBS

Unlike alluvial gold, which is found as very small flakes on riverbanks, gold-bearing rocks have to be dug out of the ground We're after pure gold, but rock that contains gold also includes lots ....

rocks which contain gold - casaramosbe

Photos of gold ores, quartz, telluride gold ore and gold , Gold and silver are obtained from a variety of or Most people think of nuggets and such, but the truth is that very little comes from nuggets - nearly all newly mined gold comes from ores mined from the natural hard rocks that contain gold in tiny, even microscopic particl....

Metal, Iron, & Nickel - Meteorite Information

Many rocks contain small grains of sulfide minerals like pyrite ("fool's gold") or micas that are finely disseminated and shiny I've had many people tell me, "But, it contains ,...

Underground mining (hard rock) - Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubi...

Prospecting Encyclopedia: Geology of how Gold Deposits ,

Most byproduct gold has come from porphyry copper deposits, which are so large that even though they contain only a small amount of gold per ton of ore, so much rock is mined that a substantial amount of gold is recovered...

Gold: The mineral native Gold information and pictures

Much of the gold mined is actually from gold ore rather then actual Gold specimens The ore is often brown, iron-stained rock or massive white Quartz, and usually contains only minute traces of gold To extract the gold, the ore is crushed, then the gold is separated from the ore by various methods...

Hard Rocks That Contain Gold - greenrevolutionorgin

hard rocks that contain gold_Crusher manufacturers A guide to finding gold deposits for prospectors, geologists, rock hounds & the novice Gold prospecting methods that are proven to work...

hard rock crusher for gold mines - perkinspreschool

Dec 18, 2017· Hard rock mining refers to various mining techniques used to excavate hard minerals, mainly those containing metals, such as ore containing gold, silver, iron, Our lines of crushers, screens, samplers and classification equipment are all...

Gold | Volcano World | Oregon State University

Diagram from ITAM Gold by the Minerals Council of Australia Gold in Porphyry Deposits Gold and copper are found in ore bodies associated with porphry Porphry is a general term applied to igneous rocks of any composition that contain conspicuous phenocrysts (crystals) in a ,...

Identifying Rocks : Identifying Gold Rocks - YouTube

Jun 08, 2009· Gold is a very rare and precious metal that is soft, malleable and heavy, and it is often found with other minerals, such as quartz Learn about the differences between gold and fool's gold with ....

Gold in Wyoming - Blogger

These hard rocks contain valuable gold (about 50% of the gold mined in the world was from paleoplacers in the Witwatersrand of South Africa), uranium and some diamonds Consolidated gold-bearing paleoplacer with distinct, rounded...

Geology Of Hard Rock Gold Deposits

Structurally controlled quartz veining (Lode) is one of the most common types of deposits in North America that contain goldThese deposits are formed when hydrothermal fluids containing silica and gold cool off in cracks and faults in the rock mass...

hard rocks that contain gold - namesprojectsouthfloridaorg

hard rocks that contain gold As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including quarry, aggregate, and different kinds of minerals...

Photos of gold ores, quartz, telluride gold ore and gold ,

Gold and silver are obtained from a variety of or Most people think of nuggets and such, but the truth is that very little comes from nuggets - nearly all newly mined gold comes from ores mined from the natural hard rocks that contain gold in tiny, even microscopic particl...

Gold Mining Methods - Ground Truth Trekking

Today, gold is extracted in hardrock mines that directly mine the source rock, or "lode" of gold, where it was originally deposited by geochemical process Most ore accessed this way today contains only microscopic grains of gold, and it takes tons of rock to produce ounces of gold...

Gold in lgneous,Sedimentary, And Metamorphic Rocks

Gold in lgneous,Sedimentary, And Metamorphic Rocks Gold in Igneous, Sedimentary, And Metamorphic Rocks By Robert S Jones GEOLOGICAL SURVEY CIRCULAR 610 , Sedimentary rocks contain as little as 0 3 to as much as 41 ppb gold The average of 50 ppb is based on the average of 75 ppb for sandstone, 3 9 ppb for shale, and 3 5 ppb for ....

General Types of Gold Deposits - Minelinks

In nature, gold occurs predominantly in the native state or as a major constituent of various alloys containing mainly silver, copper, or platinum metals Several gold and gold-silver tellurides are known, of which the most common are sylvanite, calaverite, petzite, krennerite, and nagyagite...

Precious metals gold, silver, platinum, palladium and ,

Gold, Silver, Platinum, Palladium and Titanium are precious metals, meaning they are rare metallic chemical elements of high economic value, shiny, hard, strong with high melting points They form alloys (mixtures) with other metals and this makes them ideal for jewellery...

hard rock mining gold - perkinspreschool

Dec 04, 2018· HARD ROCK GOLD MINING !!!! Getting Gold From Rocks ask Jeff Jan 25, 2016 We do both Hard Rock and Placer mining this time and have a lot of fun finding that Shiney...

What does Gold Look Like in Nature? Identify Real Gold

Most of the gold that is mined around the world is found in lode sources, also known as hard rock deposits This is where the gold is actually encased within rocks and must me manually removed from the Earth to extract the gold The gold bearing material is called ore...

Everything You Need to Identify Rocks - ThoughtCo

To identify a rock, think like a geologist and examine its physical characteristics for clu The following tips and tables contain characteristics that will help you identify the most common rocks on earth Rock Identification Tips First, decide whether your rock is igneous, sedimentary or metamorphic...

Pyrite Mineral | Uses and Properties

Pyrite as an Ore of Gold The most important use of pyrite is as an ore of gold Gold and pyrite form under similar conditions and occur together in the same rocks In some deposits small amounts of gold occur as inclusions and substitutions within pyrite Some pyrites can contain 025% gold by ,...

How can we recognize a rock containing gold? - Quora

I can recognize rocks that MIGHT contain gold, but in order to actually know they contain gold (and how much) I would need to have that rock analyzed in a reliable laboratory, using advanced analytical methods - for instance, atomic absorption spectrophotometry, or mass spectrometry, or (ideally) gravimetric fire assay...

Gold - USGS

Most byproduct gold has come from porphyry deposits, which are so large that even though they contain only a small amount of gold per ton of ore, so much rock is mined that a substantial amount of gold is recovered...

Gold Prospecting - Prospector's Guide to Finding Gold

A guide to finding gold deposits for prospectors, geologists, rock hounds & the novice Gold prospecting methods that are proven to work Gold Prospecting - Prospector's Guide to Finding Gold , in situ deposits in hard rock: , that flattened and stretched the pebbles in the rock Such rock sometimes contain gold, uranium and even diamonds ....

Crystalline Gold 2 - gold nuggets - california gold rush

Crystalline gold is very delicate and hard to extract due to very costly mining expens Millions of years ago, gold was pushed up through the earth's crust but at this particular spot, there was thermo steam at over 4000 degrees F which also came up This forced crystallized gold into the quartz rock To a collector, crystallized gold is ....

How to find gold in quartz rock specimens

Hard rock mining, also known as lode mining, is obviously the best method for finding gold specimens since you are mining the true source of the gold by following veins of high grade ore into the mountain...

which kind of rocks contain's gold? help!,and what are ,

Jun 13, 2008· There are various occurrences of gold Gold can infiltrate magma, forming gold ore in granite Gold nuggets can form in quartz veins in metamorphic rocks during mountain building Or it can form in sedimentary rocks after erosion and river transport Gold is often found with silver...