Geology and Geography
Burra is located within the hundred of Kooringa a few kilometres inside Goyder's Line, near Burra, Baldina and Gum creeks.
The main body of copper ore formed between two geological faults in broken dolomite rocks. The ore body was up to 70 metres (230 ft) wide and mainly consisted of green malachite and blue azurite veins and nodules amongst the host rock. The malachite and azurite were formed from copper sulphide minerals, by a process known as "secondary enrichment". This process took millions of years to convert the low grade copper sulphide ore, which was probably created 300 to 400 millions of years ago during the last period of vulcanism near Burra.
Read more about this topic: Burra, South Australia
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