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Examples of Ore Forming Processes

Examples of Ore Forming Processes. Igneous: Intrusive. A. Separation of mineral by density Example chromite the ore mineral for Cr B. Separation of immiscible liquid Example: Ni and Cu C. Late Stage Crystallization Example: Cu and Au Hydrothermal Fluids Example: Au.

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Examples of Ore Forming Processes

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  1. Examples of Ore Forming Processes

  2. Igneous: Intrusive • A. Separation of mineral by density • Example chromite the ore mineral for Cr • B. Separation of immiscible liquid • Example: Ni and Cu • C. Late Stage Crystallization • Example: Cu and Au • Hydrothermal Fluids • Example: Au

  3. Igneous: Volcanic • A. Fumaroles • Example: S, Au • B. Mid-ocean ridges • Example: Cu, Pb, Zn, Au • C. Hydrothermal Fluids • Example: Au, Ag

  4. Smokers and other things

  5. East Pacific Rise

  6. Making Ore Deposits

  7. Black Sulfide Rich Fluid

  8. Artistic Drawing of Smoker Field

  9. A Hot one out of a Chimney

  10. String of Clams

  11. Tube Worms and Clams

  12. Spider Crab

  13. Giant Clams

  14. Tube Worm Colony

  15. And More Tube Worms

  16. Sedimentary Processes • A. Density Differences • Example: Au, Ti, Diamonds • B. Weathering • Example: Bauxite and other laterites • C. Chemical Precipitation • Example: Banded Iron Formations, Salt, Gypsum

  17. Placer Deposits as an example • Resistate Minerals • Tough • Heavy • Chemically resistant

  18. Examples of Resistate Minerals • Au

  19. Pt, Cassiterite (for Sn), Chromite (Cr), Columbite (for Nb), Cu, Diamond, Garnet • Ilmenite (for Ti), Magnetite and Hematite (for Fe), Monazite (for rare earth elements) • Ruby and Sapphire • Rutile (for Ti), zircon (for Zr), and xenotime (for Y)

  20. Garnet

  21. Hematite

  22. Native Cu

  23. Cassiterite

  24. Corundum: Ruby and Sapphire

  25. Placer Deposits • Eluvial • Stream or alluvial placers • Beach placers

  26. Tributary into main stream

  27. Riffles

  28. Meanders

  29. Ripples—lag deposits

  30. Beach Placers

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