Ancient Mining Tools and Techniques

Updated on May 11, 2018
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John prospected for gold in Arizona 8 years. His experience taught him to deal with the terrain, heat, and gold fever. He makes many tools.

Gold, Silver, and Copper Make Nice Jewelry

Jewelry of a Sumerian queen's attendant from 4000 years ago
Jewelry of a Sumerian queen's attendant from 4000 years ago | Source

Evidence has it that gold has been mined since about 3000 BC. The oldest objects of gold were discovered in the Sumerian capital of Ur, which is in the southeastern part of present day Iraq. There, a royal tomb was excavated revealing gold chains for jewelry. From 2500 BCE on, gold was produced for jewelry and found in Egyptian tombs. Objects including necklaces, bracelets, earrings, rings, diadems, pendants, pins and brooches have been discovered. The ancients mined it for their rulers for ages.

Electrum coin from Ephesus, 620-600 BC, known as Phanes' coin. Obverse: Stag grazing
Electrum coin from Ephesus, 620-600 BC, known as Phanes' coin. Obverse: Stag grazing | Source

It Appears to be Solid Gold

Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. It has also been produced artificially, and is often known as green gold. The ancient Greeks called it 'gold' or 'white gold', as opposed to 'refined gold'. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver.

Gold Makes Good Money

Because it is rare, has a dazzling luminescence, and is very malleable, it has been sought after since time immemorial by rulers as a display of power. As the concept of a currency took hold in bygone civilizations, gold was easily pounded into coin shapes. Molds were built in which the gold was hammered. Though soft, it held its shape. It was neither brittle nor prone to tarnish (it does not oxidize) - all good characteristics for coinage.

Ulysses and the Golden Fleece

Arranging a sheep hide downstream of a water flow, ancient miners would trap even the smallest of flakes of gold in the fleece. When the fleece's absorption of gold flake had maxed out, the pelt was hung up to dry. Then, with some sort of covering spread beneath the hide it was gently tapped, the gold falling off and being recovered.

Jason brings Pelias the Golden Fleece; a winged victory prepares to crown him with a wreath. These images found on an ancient Roman vase
Jason brings Pelias the Golden Fleece; a winged victory prepares to crown him with a wreath. These images found on an ancient Roman vase | Source

Rock Can Break Rock

Through the Stone Age and beyond, man required material to make and improve his tools and weapons. Many of the tools were made from rock and were used to break brittle ore. As late as the first century AD, Roman reporters claimed that flint was the hardest of materials. Small flint picks and hammers have been discovered around the world. The Egyptians mined flint as long ago as 50,000 years.

Hammering rock with stone implements does not seem very realistic, even for an ancient progressive culture. The ancients developed a system of fire-setting. They might dig away an area and then set a roaring fire which heated up the rock. After reaching an appropriate temperature, the fires would be doused with water to cause rapid cooling. This caused the rock ledges to become brittle, thus becoming easier to crack with stone tools.The ancient civilizations, including the Greeks and Romans used this technique.

Rock Riffles Carved by Man

East of Downieville, California it is reported that sluices were cut into solid rock. At about 5' wide, 6' deep, and with a trap every 20', 49ers washed out dirt above and ran it down through this carved sluice. It is not hard to imagine ancients doing the same thing. I have seen areas in Arizona where there are natural formations that act like a man-made sluice. If I see such areas warn into the rock, it is the first place I look for gold. These areas tend to slow the speed of the water and trap sediment. Frequently clays are trapped there and within it will lie gold flake.

Seeping Water Floods the Shafts

Of course, the ancients had the same types of problems mining as modern day miners. Whenever you dig down, you risk hitting the water table. Dealing with water leaking into a shaft is tricky. The Archimedean screw is a machine historically used for transferring water from a low-lying body of water into irrigation ditches. Water is pumped by turning a screw-shaped tool inside a pipe. The screw is limited by how much it can be leaned; at too high an angle the water runs backward.

Roman screw used to dewater mines in Spain
Roman screw used to dewater mines in Spain | Source

Ancient Water Wheels

The favorite tool for removing water was the tympanum. Two wheels oriented next to each other would turn carrying water to higher level. When the water dumped out, it would run to another pair of wheels which would pick up the water. By repeating this up a shaft, water could be removed. These wheels were turned by slaves - animals could not be transferred down the vertical shafts. Food was also a critical consideration. Food was expensive and humans ate less. Such were the hard facts about ancient mining.

A Vast Roman Mining Region in Iberia

Riotinto is part of the Iberian Pyrite Belt stretching from Spain into Portugal. Archaeologists have learned a great deal from a Roman Riotinto mine located in Portugal. Eight pairs of wheels have been discovered there dating to 206 BC. They lifted water 30 meters and slaves had to work around the clock to keep the wheels turning in order to purge the water.

The development of a Roman gold mine in Whales, United Kingdom
The development of a Roman gold mine in Whales, United Kingdom | Source

Plenty of evidence shows how material was removed from old mines. Baskets were often tethered together by rope and the baskets were drawn across the ground or brought to the top of the mine by wooden pulleys. Local grasses were weaved into these baskets.

Oil lamp with Gladiators fighting at the Römisch-Germanisches Museum Cologne
Oil lamp with Gladiators fighting at the Römisch-Germanisches Museum Cologne | Source

Small ceramic cup-like lamps have been discovered in Phoenicia. Phoenicia is an ancient civilization that stretched through modern-day Syria, Lebanon and northern Israel. These bowl-shaped objects held burning oil to provide light for miners in these dark depths. The photograph of a Roman lamp is similar in shape - the miners' lamps had no engravings.

The lost-wax method of casting was developed in Egypt for holding molten copper. Wax is molded into the form of an object. This is then covered with clay. The wax is melted resulting in an earthen mold. Molten copper was then poured into the mold; most Egyptian copper molds were used for jewelry. This technique was used even prior to the Bronze Age, 4000 BC.

Bog ore from a forest near Zyrardow, Poland
Bog ore from a forest near Zyrardow, Poland | Source

Iron smelting from bog iron was invented during the Pre-Roman Iron Age, and most Viking era iron was smelted from bog iron. In Northern and Northeastern Europe, bogs were the site of bog iron, the earliest form of iron used for tools. Iron compounds from plant decay precipitate out and are deposited at the bog bottom. These nuggets of iron were harvested and smelted to produce mining tools of wrought iron. Some people harvest iron in this manner to this day. New bog iron was formed each generation, so a son could harvest the bog when he became his father's age - a material source through regeneration.

Conclusion

Gold and copper are found in there purest forms. It is speculated that the fire-setting method may have melted these or other metals which were observed to be strong or beautiful. These observations led ancient man to smelting for the production of weapons. This in turn led to wider uses and eventually the start of civilizations.Though mining causes degrees of contamination, without it, the progress man has made would not have been possible.

Archimedes screw as a piece of sculpture in the Netherlands demonstrating its function - photo by Polleket
Archimedes screw as a piece of sculpture in the Netherlands demonstrating its function - photo by Polleket | Source

Sources

https://www.ancient.eu/gold/ by Mark Cartwright,
published on 04 April 2014

http://www.onlygold.com/Info/History-Of-Gold.asp, A Brief History of Gold, Who Discovered Gold?, Facts and Statistics

https://uwlabyrinth.uwaterloo.ca/labyrinth_archives/ancient_mining_techniques.pdf, Ancient Mining Techniques, by Chris Mundigler

https://en.wikipedia.org/wiki/Bog_iron, 24 April, 2018, Wikipedia

https://en.wikipedia.org/wiki/Reverse_overshot_water-wheel

http://barryyeoman.com/2010/09/the-mines-that-built-empires/, September 28, 2010, Barry Yeoman, For 5,000 years, Spain’s mineral riches created cash economies and global pollution

https://www.quora.com/Ancient-Civilizations-How-could-people-in-the-past-mine-for-metals, August 25, 2015, Renatus Peregrinus and Anthony Tauro, from Quora Ancient Civilizations: How could people in the past mine for metals?

https://www.tapatalk.com/groups/ancientlosttreasures/ancient-sluices-t3040.html, March 15, 2004, Ancient Lost Treasures

http://www.ancient-wisdom.com/mining.htm, Prehistoric Mining, Ancient-Wisdom, Alex Whitaker, 2012

https://www.miningreece.com/mining-greece/mining-history/ancient-mines/, Mininggreece.com, staff


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