northwest Islands of Gold in an Ocean of Land - The Macquarie Arc- Superb video!!!!
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australian electronic gold prospecting forum.com  |  Geology and earth sciences  |  Earth sciences and related topics  |  Structural Geology, plate tectonics.  |  Topic: Islands of Gold in an Ocean of Land - The Macquarie Arc- Superb video!!!! 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Islands of Gold in an Ocean of Land - The Macquarie Arc- Superb video!!!!  (Read 56 times)
Doug
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« on: Thursday February 7 2019 11:58:08 AEDT AM »

Islands of Gold in an Ocean of Land - The Macquarie Arc
The Macquarie Arc is an ancient volcanic island arc that formed in the southern Pacific Ocean 450 million years ago. The volcanic rocks that formed the islands are now part of the eastern Australia mainland - and are rich in porphyry style gold and copper deposits. Earth scientists explain how they unravelled the complex story of the arc using clues from the chemistry of the rocks, and from fossils that lived in coral reefs around the islands. Plate tectonics created the island arc but finally destroyed it by pushing the volcanic rocks, and mineral deposits, onto the eastern Australian seaboard.
  
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australian electronic gold prospecting forum.com  |  Geology and earth sciences  |  Earth sciences and related topics  |  Structural Geology, plate tectonics.  |  Topic: Islands of Gold in an Ocean of Land - The Macquarie Arc- Superb video!!!! « previous next »
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