Sep
24
0

Heads or Tails?

Assembly of tails processing plant

Assembly of tails processing plant

Green Leaf Gold’s project to date has focused on mining shallow deposits of gold in an ancient river bed 1,000 miles downstream from its origin in the Andes. Primary mining of previously untouched gold deposits is only one side of the gold coin, though. The process is 80-90% efficient, meaning that the particles of gold not captured through our gravity sorting process are left behind.

This summer, with the expertise of Alberto Azcui and the mine’s general supervisor Fernando Saravia, both life-long miners, we’ve added a tails processing project. Tails are the leftovers from primary mining. Many mines never bother to recover gold from the tails. Some do not have the equipment and others seek higher profit margins through primary mining.

Testing the plant operation

Testing the plant operation

There can be profit in tails as long as the concentrations of leftover gold are high enough, but it is a slow money type of profit. From the triple bottom line perspective of social and environmental benefits, tails processing is good money. When tails are processed alongside primary mining, more jobs are created for each ton of earth moved. More gold is recovered, as well, from each ton. Increased efficiency reduces pressure to mine new areas.

Project leaders satisfied with new assembly

Project leaders satisfied with new assembly

Tails processing involves sluice boxes like primary mining does. It also applies shaking and centrifugal force to separate fine gold particles from silt and sand. Pilot production showed that the system can recover 0.1 to 0.2 grams per ton of tails, making the project viable. Incredibly, there’s about 1,000,000 tons of tails at the mine site – enough to employ miners for years to come. Tails production also diversifies income, providing greater financial stability for the mine.

Gold and fine silt captured

Gold and fine silt captured

OPEN LETTER TO INFINITO GOLD, MININGWATCH CANADA, COUNCIL OF CANADIANS,

AND THE GOVERNMENT OF COSTA RICA

 REGARDING MINING DISPUTE

December 17, 2013

Dear Friends,

My views have not been solicited by any of you, but your dispute has spilled into the court of public opinion. The outcome may affect the future of gold mining companies like my own, so I am taking the liberty of entering the debate.

Appeal to Infinito Gold:

 

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Minamata signing photo

On Oct. 10, 2013, representatives from around the world gathered in Japan to formally adopt the text of a new global environmental treaty, the Minamata Convention on Mercury. The treaty now needs 50 countries to ratify it before its pollution prevention measures go into effect.

A United Nations Environment Program website tracks the progress of treaty ratification here.

The official announcement of the treaty signing is here.

Text in the treaty applicable to gold mining is below. Countries where artisanal gold mining takes place and that ratify the treaty will follow a number of steps to reduce and gradually eliminate mercury from gold production.

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What’s the largest green gold mine in the world?  Part of it is probably situated in your jewelry box or sock drawer.  It’s all the gold that no longer holds meaning for its owners, just sitting around collecting dust!

Rings recycled for $445!

Recycling of gold is the most environmentally friendly way to put gold into the market. My wife and I recently contributed to the effort by sending our high school rings to the nation’s leading gold recycling company, Hoover & Strong.  We were rewarded with a check for $445 for these and one other small ring!  Our local jewelry store only offered $260, so we were pleased with the H&S payout. Please let us know if you have a positive experience with Hoover & Strong, too.

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May
21
0

Fair Trade Gold Glitters

wedding ring 1 croppedThe newest Fair Trade standard, gold and associated precious metals, made its debut a little more than a year ago. It promises to improve social and environmental conditions for millions of small and artisanal gold miners around the world.

According to British fair trade jeweler CRED, “wedding bands represent the ultimate symbol of love” and are “the most popular fair trade jewelry” in the store.

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Global anthropogenic mercury emissions in 2010 (UNEP pic)According to the United Nations Environment Program, gold mining is now the largest source of mercury pollution on the planet. It exceeds coal burning power plants, the source previously ranked as the largest.

UNEP’s full Global Mercury Assessment 2013 is available on their website.

Jan
22
0

Green Mining Song

MarcelloVeiga green mining songThis song “speaks” for itself!