Copper was obviously a vital commodity for the Bronze Age Atlantis described by Plato. The source of this copper has led to frequent speculation among Atlantologists. Frank Joseph proposed that copper was the foundation for the wealth of Atlantis. He is convinced that there is evidence of enormous copper mining activities in Michigan’s Upper Peninsula around 1000 BC. He refers to these miners as Atlanteans  and maintains that the extracted copper was brought to the Mediterranean, claiming that there is no trace of it in North America!
Joseph’s wild claim runs counter to the evidence offered by one of the leading mining engineers of his day, T.A. Rickard (1864-1953)(m). In 1934, Rickard published an extensive paper in The Journal of the Royal Anthropological Institute of Great Britain and Ireland entitled The Use of Native Copper by the Indigenes of North America(n). Rickard notes how early European colonists observed the native Americans using copper for tools and ornaments. A more recent entry(o) in Wikipedia offers further details reinforcing Rickard’s contention. Similarly, a March 2021 article in Archaeology offers evidence that native Americans were producing artefacts from copper as early as the 7th millennium BC and were probably the world’s first coppersmiths(r)(s).
In another article in Atlantis Rising magazine, Joseph proposed that the exploitation of the Michigan copper began in the sixth millennium BC with the arrival of the Red Paint People from Europe!(i)
Frank Joseph and Gavin Menzies are late with their claims regarding the exploitation of the Michigan copper by Atlanteans. In 1928, it was Giacinto Perrone in his book L’Atlantide  who was an early promoter of the idea of Atlantean involvement in the ancient Michigan copper mining(t).
J.S. Wakefield has written an extensive article(j) linking the Michigan mines with Poverty Point in Louisiana, where, he contends that the copper was cast into oxhide ingots. In the same article, he identified the Sea Peoples as the Atlanteans and their allies. In another paper(q) he presents a case for identifying the copper oxhide ingots discovered in the Late Bronze Age Uluburun shipwreck found off Turkey as originating in Michigan. He bases his claim on the unusual 99.5% purity of these copper ingots, which he claims is only to be found in the Great Lakes mines. Wakefield is a co-author with Reinoud de Jonge of Rocks & Rows: Sailing Routes Across the Atlantic and the Copper Trade .
Roger Jewell has written an important book  on this same historical mystery but dates the early mining to 2500 BC and estimates the quantity of copper mined at 20 million pounds. Jewell offers a range of evidence that points to Minoan traders, an idea taken up recently by Gavin Menzies, who quotes estimates of between three and five hundred million pounds, while others have suggested as much as 1.5 billion pounds have been extracted. These wild speculations have been derided by commentators such as Jason Colavito(b).
Dale Drinnon has an extensive entry on the Michigan copper mines on his wide-ranging website(c).
Philip Coppens also wrote a speculative article on the possible part that Michigan’s copper plated in global trade around 3000 BC(g). Commenting on the possible market for the Michigan copper, he wrote that it is remarkable, “that Bronze Age Europe ended in 1200 BC, which coincides with the end of the mining activities in America. Coincidence? The mining technique in America is also identical to those used on the British Isles, where the other component, tin, originated from.”
The America Unearthed TV series, presented by Scott Wolter, also examined the idea of Minoans mining in Michigan (S1 E3). Jason Colavito wrote a highly critical review of the episode(k), while an even more extensive critique can be found on the Archyfantasies.com website(l).
Ilias D. Mariolakos is a Professor Emeritus of Geology and Paleontology at the University of Athens. In 2010 he presented a paper to the 12th International Congress of the Geological Society of Greece stating that the prehistoric Greeks were familiar with the Atlantic Ocean and its Gulf Stream. He also claims that they exploited the Michigan copper mines to meet the needs of their bronze industry.
David Hatcher Childress, who is consistently generous with his speculations has proposed that the Hittites were responsible for the Michigan copper mining [620.65].
Peter Marsh has suggested(u) that the Michigan copper mining was the work of Berbers and Phoenicians!
Additionally, the late Bernhard Beier published two articles(v)(w) on the debate surrounding the astounding quantity of copper apparently mined in Michigan. It is clear that he, like Peter Marsh and others, was sympathetic to the idea that Old World miners were involved, who were possibly Phoenicians, Berbers or Egyptians.
>John Jensen has noted(x) that “curiously, North American Indian mounds have been found to contain copper sheets made in the shape of animal hides. Called “reels,” their function, if any, is unknown. The reels do, however, resemble oddly shaped copper ingots common in European Bronze Age commerce. Their peculiar shape earned these ingots the name “oxhides” and has been found in Bronze Age shipwrecks, and are even said to be portrayed on wall paintings in Egyptian tombs. The standardized hide-like shape, with its four convenient handles, was useful in carrying and stacking heavy ingots. Could the reels from the North American mounds have been copied from the oxhides? It is tempting to speculate that the Copper Culture miners were actually an Atlantic rim colony.“
A further word of caution regarding North American copper oxhide ingots is offered by a report from Andy White outlining his attempts to verify their existence(y).<
So far, we have on offer, Native Americans, Red Paint People, Sea Peoples, Greeks, Minoans, Hittites, Atlanteans, Berbers and Phoenicians all allegedly involved in the ancient exploitation of the Michigan copper. Take your pick, but base your choice on evidence, if any, rather than speculation.
It is claimed that the local Indians have folk memories of the mines being worked by ‘light-skinned’ men, suggesting a possible European or Mediterranean connection. Frank Joseph implies that these natives had little interest in copper although one of the cultures in the Great Lakes region was known as the Old Copper Indian because of their extensive use of copper for weapons, tools and ornaments(h). Furthermore as early as 1585 British settlers on Roanoke Island noted that the indigenous people there put a high value on copper.
A more conventional analysis of the Michigan copper mining mystery is presented by local archaeologists. They point out that the views of commentators such as Frank Joseph are very generous with speculation but somewhat mean with evidence. Dr Susan R. Martin of Michigan Technological University has published a point-by-point refutation(a) of the many wild claims that have been made about the Michigan mines in The Michigan Archaeologist [41 (2-3) p119-138. June-September 1995].
Even more extreme was the suggestion made by Reinoud M. de Jonge in a 2009 paper(e) where he boldly claimed “that during the whole period of the (Michigan) copper trade, America was part of the Egyptian Empire” and during the Old Kingdom “this huge empire was known as Atlantis”! De Jonge expanded on this in a 2012 paper, justifying his claims with an incredibly detailed interpretation of the Phaistos Disk, which appears to be highly speculative(p).
In the eastern Mediterranean, Cyprus, taking its name from copper, provided much of that metal, which enabled the development of the Bronze Age there. In the central and Western Mediterranean ancient copper mines have been identified in Iberia, Morocco and Sardinia as well as sources of tin. However, a 1982 paper(f) claimed that Laurion in Attica, Greece was equally as important as Cyprus as a source of Bronze Age copper.
The earliest known metal mine in the British Isles was on Ross Island, near Killarney in Ireland. Copper was mined there from 2400 BC until 1900 BC(d) and the site is thought to have been the principal source of the metal for the two islands at that time.
Supporters of an earlier date for Atlantis can point to evidence of worked metal around 9000 BC discovered in Anatolia, Turkey. More recently there were metal beads discovered in Bulgaria tentatively dated to 6000 BC.
(a) See Archive 2547
(c) See: Archive 3597
(g) See Archive 2724
(i) See Archive 3389
(r) Ancient Native Americans were among the world’s first coppersmiths | Science | AAAS (sciencemag.org)
(u) https://web.archive.org/web/20190922053225/http:/www.polynesian-prehistory.com/ (chapter 10)
(v) Prähistorischer Kupferbergbau in Nordamerika und eine frühe Transatlantik-Connection (I) – Atlantisforschung.de (atlantisforschung-de.translate.goog)
(w) Prähistorischer Kupferbergbau in Nordamerika und eine frühe Transatlantik-Connection (II) – Atlantisforschung.de (atlantisforschung-de.translate.goog)
(x) (99+) Ancient Canal Builders – Overview | John Jensen – Academia.edu (p.32) *
(y) https://www.andywhiteanthropology.com/blog/the-oxhide-ingot-from-lake-gogebic-michigan *