History of Copper
The Egyptians found that adding a small amount of tin made the
metal easier to cast, so bronze alloys were found in Egypt almost as
soon as copper was found. Use of copper in ancient China dates to at
least 2000 BC. By 1200 BC excellent bronzes were being made in China.
Note that these dates are affected by wars and conquest, as copper is
easily melted down and reused. In Europe, Oetzi the Iceman, a
well-preserved male dated to 3200 BC, was found with a copper-tipped
axe whose metal was 99.7% pure. High levels of arsenic in his hair
suggests he was involved in copper smelting. Brass, an alloy of zinc
and copper, was known to the Greeks but first used extensively by the
Romans.
There are copper and bronze artifacts from Sumerian cities that date
to 3000 BC, and Egyptian artifacts in copper and copper alloyed with
tin nearly as old. In one pyramid, a copper plumbing system was found
that is 5000 years old.
In Greek times, the metal was known by the name chalkos (χαλκός).
Copper was a very important resource for the Romans and Greeks. In
Roman times, it became known as aes Cyprium (aes being
the generic Latin term for copper alloys such as bronze and other
metals, and Cyprium because so much of it was mined in Cyprus).
From this, the phrase was simplified to cuprum and then
eventually Anglicized into the English copper. Copper was
associated with the goddess Aphrodite/Venus in mythology and alchemy,
owing to its lustrous beauty, its ancient use in producing mirrors,
and its association with Cyprus, which was sacred to the goddess. In
alchemy the symbol for copper was also the symbol for the planet
Venus.
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| Ancient Copper ingot from Zakros, Crete is
shaped in the form of an animal skin typical for that era. |
Copper, as native copper, is one of the few metals to naturally
occur as an uncompounded mineral. Copper was known to some of the
oldest civilizations on record, and has a history of use that is at
least 10,000 years old. A copper pendant was found in what is now
northern Iraq that dates to 8700 BC. By 5000 BC, there are signs of
copper smelting, the refining of copper from simple copper compounds
such as malachite or azurite. Among archaeological sites in Anatolia,
Çatal Höyük (~6000 BC) features native copper artifacts and smelted
lead beads, but no smelted copper. But Can Hasan (~5000 BC) had access
to smelted copper; this site has yielded the oldest known cast copper
artifact, a copper mace head.
Copper smelting appears to have been developed independently in
several parts of the world. In addition to its development in Anatolia
by 5000 BC, it was developed in China before 2800 BC, in Central
America around 600 AD, and in West Africa around 900 AD.[2]
The use of bronze was so pervasive in a certain era of civilization
that it has been named the Bronze Age. The transitional period in
certain regions between the preceding Neolithic period and the Bronze
Age is termed the Chalcolithic, with some high-purity copper tools
being used alongside stone tools.
Copper mining
Copper has been mined for many centuries. By 2000 BC, Europe was
using copper-tin alloys or ‘bronze’. The Bronze Age is taken as 2500
BC to 600 BC.
During the Bronze age, copper was mined in the British Isles
mainly in the following locations: South West County Cork, West Wales,
North Wales, Anglesey (Parys Mountain), Cheshire, the Staffordshire
Moorlands and the Isle of Man, which is between England and Northern
Ireland. At Alderley Edge in Cheshire, carbon dates have established
mining at around 2280 - 1890 BC (at 95% probability).
Copper mining in United States began with marginal workings
by Native Americans and some development by early Spaniards. Europeans
were mining copper in Connecticut as early as 1709. Westward movement
also brought an expansion of copper exploitation with developments of
significant deposits in Michigan and Arizona during the 1850's and
then in Montana during the 1860's. Copper was mined extensively in
Michigan's Keweenaw Peninsula with the heart of extraction at the
productive Quincy Mine. Arizona had many notable deposits including
the Copper Queen in Bisbee and the United Verde in Jerome. The
Anaconda in Butte, Montana became the nation's chief copper supplier
by 1886.
Copper mining in South Africa
Some two billion years ago, a series of violent volcanic eruptions,
which took place over a period of millions of years, gave rise to a
rich body of minerals, which became known as the Palabora Igneous
Complex. The unique ore body outcropping at a small saddleback hill,
later to be called Loolekop, contains a unique variety of minerals -
copper, phosphates, magnetite, uranium, zirconium, nickel, gold,
silver, platinum, and palladium. Two other volcanic pipes nearby
contain vermiculite and phosphate. Smelting of copper iron occurred in
the district prior to the discovery. We know from the artifacts found
in the area, that copper of remarkable purity was produced in the
Phalaborwa area as early as the 8th century.
Development of modern mining activity started at the beginning of
the century when several geologists in the noted the occurrence of the
phosphate bearing mineral, apatite, in the vicinity of Loolekop.
Palabora Mining Company Limited extracts and beneficiates copper and
vermiculite from its mines in the Limpopo Province. The company is
South Africa’s only producer of refined copper. The mining of the
company’s copper ore-body commenced in 1956.
Copper Pricing
The Intergovernmental Council of Copper Exporting Countries (CIPEC),
defunct since 1992, once tried to play a similar role for copper as
OPEC does for oil, but never achieved the same influence, not least
because the second-largest producer, the United States, was never a
member. Formed in 1967, its principal members were Chile, Peru, Zaire,
and Zambia.
The copper price has quintupled since 1999, rising from $0.60 per
pound in June 1999 to $3.75 per pound in May 2006.
Sources:
Wikipedia and
Palabora Mining Company
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