Does limestone have gold?

Does limestone have gold?

The gold is found in small quartz veins that are concentrated in large fissure zones of shattered and altered rock. In a few areas gold occurs in higher-grade replacement deposits in limestone (Status of Mineral Resource Information for the Fort Belknap Indian Reservation, Montana ( This site may be offline. ) ).

What can be found in limestone?

limestone, sedimentary rock composed mainly of calcium carbonate (CaCO3), usually in the form of calcite or aragonite. It may contain considerable amounts of magnesium carbonate (dolomite) as well; minor constituents also commonly present include clay, iron carbonate, feldspar, pyrite, and quartz.

Can silver be found in limestone?

In Mexico deposits of silver-bearing ore are found in limestone, also between slaty and porphyritic rocks, and traversing igneous and metamorphic formations. In Colorado and other Western States and Territories of America chloride of silver deposits occur in limestone, sandstone.

What precious minerals are found in limestone?

Limestone Gemstones & Minerals

• Calcite: Of all minerals, calcite is by far the richest in forms.
• Barite: Barite also called Baryte or heavy spar is a clear to yellowish to blue mineral that is very soft and not well suited for making of gemstones. (

Can you find diamonds in limestone?

The gems occur in “pockets ” and in groups. Rubies are also found in dolomite. The Burmah rubies are found in a limestone deposit; also in alluvial deposits (formed from disintegrated gneiss rock), in beds of rivers, in limestone rock. Diamonds are usually met with in alluvial soil, often on gold-diggings.

Can you find crystals in limestone?

Limestone often contains larger crystals of calcite, ranging in size from 0.02 to 0.1 mm, that are described as sparry calcite or sparite. Geologists are careful to distinguish between sparite deposited as cement and sparite formed by recrystallization of micrite or carbonate grains.

What precious metals are found in limestone?

The heat and water of the molten igneous rock make large changes in the limestone and form a variety of different kinds of metallic deposits. Contact metamorphic environments create deposits of tungsten, copper, iron, lead-zinc and gold.

Where does the gold in limestone come from?

HOWEVER – gold does not occur ‘naturally’ in limestone. The gold is introduced LATER by migrating hydrothermal fluids, which DEPOSIT gold (and some other elements) in suitable host rocks – and limestone, particularly ‘dirty’ (with silt, mud and other materials) limestone is a very suitable host rock. What can be found in limestone?

Where can gold be found in a rock?

The rock might have any number of possible origins. Gold is also found in volcanogenic massive sulfide deposits. The “association” of gold with limestone can be a matter of gold in solution, venting through fractures in limestone.

What kind of minerals are found in limestone?

Limestone mineralogy is different and of sedimentary origin. But gold can be found in altered limestone within infill materials and intrusions along structures (joints and unconformities) of the limestone. Such gold would be of epithermal origin formed as a result of intrusion.

How much gold is in Carlin limestone deposits?

These Carlin gold limestone deposits are not very rich either. Gold grade ranges from 0.035 to 1.23 ounces Au per 1 ton of limestone rock mined and processed. The gold is extracted by crushing all the mined rock to a fine powder and then processing it chemically to extract the gold.