How many grams of gold per ton is profitable?

GOLD: One ounce, or roughly 30 grams/tonne is high-grade and can be expected to move markets in most cases. Several ounces of gold per tonne is considered to be high-grade for underground mining, although 5 grams gold/tonne is usually economically viable.

What makes a good gold mine?

The World Gold Council defines a high-quality underground mine as having a gold ore density between 8 and 10 g/t, while a low-quality underground mine has a gold ore density of 1 to 4 g/t.

How is gold ppm calculated?

To convert 1 ppm into molarity you first have to calculate the number of moles in 1 mg gold (n(Au) = 0.001g/197gmol-1). Then you have to divide this value by the average number of gold atoms in one gold nanoparticle. This result in mol per Liter is equivalent to1 ppm.

What is the gold concentration?

The gold concentration is usually referred to as the gold ‘grade’. and is measured as ‘grams per tonne’, written alongside results as ‘g/t Au’. In some cases this same ratio will be listed as ‘parts per million’, written as ‘ppm’ (ie. there are 1 million grams in 1 tonne).

What is a good grade for gold?

As a rule of thumb, one ounce, or roughly 30 grams/tonne, is high-grade and, in most cases, can make a significant impact on the market. Several ounces of gold per tonne are considered high-grade for underground mining, although 5 grams gold/tonne is usually economically viable.

What is a high grade of gold?

For underground mining, the World Gold Council defines between 8 and 10 grams per tonne as ‘high-quality’, and 1 to 4 grams per tonne as ‘low-quality’. There is no exact definition of what is considered as high or low grade….Open Pit:

Low grade	0 – 0.5 gold grams per tonne
High grade	1.5 + gold grams per tonne

What is gold mining ppm?

Gold is often found in ores composed of rock with very small particles. When it comes to mining, ore with grades of gold as little as 0.5 parts per million (ppm) can be economically mined. Because ore grades of 30 ppm are usually needed before gold is visible to the naked eye, gold in most mines is invisible.

Is grams per ton the same as ppm?

ppm↔g/ton 1 ppm = 1 g/ton.

What is a good grade of gold?

Gold Purity Conversion Chart

Number of Karats	Parts of Gold	\% of Gold Purity
14K	14/24	58.3
18K	18/24	75.0
22K	22/24	91.7
24K	24/24	99.9

What is the highest grade of gold?

Gold Purity Chart

Karats	Parts of Gold	Purity [\%]
24K	24/24	99.9
22K	22/24	91.7
18K	18/24	75
14K	14/24	58.3