copper is one of the few metallic elements to occur in native or pure form, , rather than the copper oxides or copper sulfide
There are a number of places in the world where pure native state copper can be found in small deposits ,
Coro Coro, Bolivia…
copper is one of the few metallic elements to occur in native or pure form, , rather than the copper oxides or copper sulfide
There are a number of places in the world where pure native state copper can be found in small deposits ,
Coro Coro, Bolivia , Itauz Mine, Kazakhstan, Broken Hill, New South Wales, Australia Tsumeb, Namibia
&
the largest deposit of native copper in the world the western portion of the Upper Peninsula of Michigan is called Copper Country
Originally ONLY surface rocks were used & The earliest evidence for copper / tin mining comes from around 4000 BC
this ore was CuFeS2 copper iron sulfur , other metals melt or burn out below the
1984 degrees Fahrenheit that copper melts & drips out of the surrounding rock at,
then at higher temperatures you get other metals, slagging off the iron at 2,800 F
for the final conversion of this matte to pure copper to burn off any left overs
an oxidizing atmosphere was used
the Cape Gelidonya shipwreck brushwood Radiocarbon dating shows 1200 BC & lead isotopic study of the ingots shows the were composed of Cypriot copper from the Apilki mine and its surrounding area
the Uluburun shipwreck firewood Tree-ring dating shows 1300 BC & testing the ingots shows they were cast through multiple pours partially made from remelted copper the product of extensive mixing and recycling ,
Late Bronze Age Cyprus bronze stands depict men carrying an oxhide ingots & 1400 BC painted scenes in Egypt show oxhide ingots & this was at a time when Cyprus was smelting copper on a large scale to high purity & these oxhide shaped ingots had under 1% trace element content by weight as was Typical of all European smelted copper,
BUTT
Jay Stuart Wakefield's 15 year megalithic monument & petroglyph study that became Rocks & Rows, How the SunGod Reached America
assumes
the source of European Bronze Age copper that swept through after 2500 BC is unknown
&
late Bronze Age Uluburun shipwreck 1300 BC..
