|Map of Burkina Faso - CIA|
Tuesday, July 3, 2012
Gold Occurrences in Burkina Faso
In the past 40 years there has been a great deal of interest in gold mining in
This is a country that is very geologically rich with the Poura region alone
accounting for over 25 tonnes gold. As of 2003 the government brought about a
new Mining act and immediately after there were more than 30 companies that
have undertaken exploration projects in the country. They also created five new
mines that are on the point of full production.
As demonstrated by the Abitibi region of
some of the richest gold mines in the world are located on greenstone
belts. In Burkina Faso greenstone belts
cover about 3,000,000 km² of West Africa the Burkina
Faso accounted for approximately 21% of
these greenstone exposures. There are about 13 international mining companies
that are active in this area now. .
As many as 13 international mining companies are working in the country mainly in the Greenstone belts. These belts account for over 21% of
West Africa's Greenstone belt exposures that house on
the world's most prolific gold mines. Some of these mines are capable of
producing over 100 thousand ounces of gold per year. Much of this gold is
produced by the heap leaching process and probably accounts to more than
1,000,000 ounces per year. Although some of these are producing mines, more of
them are exploration projects that have been ongoing for some time.
All of the United Nations development program and
Faso indicates that the early Proterozoic
(Birrimian) Greenstone belts located at Boromo and Hound consists of steeply
dipping volcanic and volcano-sedimentary units that have been intruded by the
Eburnean granitoids there about 2 billion years old that have undergone
incipient to low grade greenschist metamorphism. Many of the former gold
prospects and mines are found in the Greenstone belts including the spell Poura
vein gold deposit and the Dossi shear zone prospects. Much of gold that is
discovered is associated with scheelite, calcium tungstate that is an ore for
the metal tungsten.
Gold mining is one of the newest stories in
Faso in recent years where the gold mining
industry has been developing apparently inexhaustible resources. There are many Australian companies that are
already there searching for gold. Many
are finding it.
Most of the primary gold deposits are derived from metamorphic rocks that were developed from auriferous rocks that were eroded away long before the placer deposits bearing them were metamorphosed in the older volcanic and volcano=sedimentary rocks. In this they are similar to the rocks found in the
district of South Africa and the Abitibi greenstone belts of Canada.