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Plumes and oceanic plateaus

Plumes and oceanic plateaus. Hot spot tectonics and large igneous provinces, prefaced by a take on opening the Atlantic and a tour of Hawaii ..and postfaced by alternate views. Types. Short and catastrophic - LIPS (Deccan) High flux, long lived and steady -(Hawaii); age progression;

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Plumes and oceanic plateaus

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  1. Plumes and oceanic plateaus Hot spot tectonics and large igneous provinces, prefaced by a take on opening the Atlantic and a tour of Hawaii ..and postfaced by alternate views

  2. Types • Short and catastrophic - LIPS (Deccan) • High flux, long lived and steady -(Hawaii); age progression; • Linear seamounts with no age-progression - MANY • Attached to MOR; • Various intraplate junk;

  3. Mantle plumes, LIPS and flood basalts What is a PLUME?

  4. Timeline of Hawaiian History NOT to scale! 85 mya: Earliest Emperor Seamounts visible today are formed 1983: Kilauea Volcano begins to erupt 43 mya: Catastrophic event causes bend in Hawaiian chain 300-750 AD Polynesiansarrive from Tahiti in outrigger canoes 1900: Hawaii becomes a US territory 65 mya: The dinosaurs (not native to Hawaii) become extinct 1 mya: Island of Hawaii forms 1778: British explorer Captain James Cook lands on Hawaii 5 mya: Island of Kauai forms 1959: Hawaii becomes a US state and the age of tourism begins

  5. The Hawaiian Islands Overview: Quick Facts

  6. The Hawaiian Chain The Hawaiian Islands and the Emperor Seamounts And The Story of Pele, Fire Goddess! 6,000 km long! Over 80 volcanoes! Why are these volcanic islands all lined up?

  7. WE’VE GOT HOT SPOTS ALL OVER THE PLACE Other examples of hot spots include: Cape Verde (off the coast of Senegal), Galapagos Islands (off the coast of Equador), Society Islands (French Polynesia), Tristan da Cunha (southern Atlantic), Iceland, and many more.

  8. This graph shows the age of the Hawaiian volcanoes

  9. This shows the heights of these volcanic land masses and their erosion due to age.

  10. Can we distinguish shallow from deep isotopic signatures in hot spots? Mantle plumes Hawaii and Oahu Radiogenic and stable isotopes and the origin of mantle plumes Koolau, the most important shield volcano- is it made of recycled or primitive material?

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