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Examples of Ore Forming Processes

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Ruby and Sapphire. Rutile (for Ti), zircon (for Zr), and xenotime (for Y) Garnet. Hematite ... Corundum: Ruby and Sapphire. Placer Deposits. Eluvial. Stream or ... – PowerPoint PPT presentation

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Title: Examples of Ore Forming Processes


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
Rippleslag deposits
30
Beach Placers
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