Evaporites

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Evaporites
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Evaporation of Seawater
0 Evaporation
50 Evaporation
80 Evaporation
90 Evaporation
No Chemical Sediments
CO32-s Begin CaCO3 CaMg(CO3)2
Sulfates Begin CaSO4(H2O)
Halite Begins NaCl
gt95 Evaporation
Mg, K salts Begin
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Depositional Environments -- Salinas
High Salinity Coastal Lakes
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• Complete evaporation of 1 km of sewater will
  provide only
• 15 meters of evaporites.
• But numerous salt deposits around the world are
  1/2 to gt2km
• Thick!!!
• This would require evaporation of 33 to 133 km of
  seawater
• Coastal Salinas cant really produce so much
  salt.

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• Michigan Basin
• 500m of Halite
• Silurian-age de-
• posits
• U.S.A.s largest
• producer of Table
• salt

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Patch Reefs Build On rim of Mich. Basin
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Silurian-age Reef Complexes of the Michigan Basin
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The Permian Reef Complex of Texas And New Mexico
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Capitan Reef Complex
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The Messinian Salinity Crisis
6 million years ago (Miocene)
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Summary of Marine Evaporite Deposition
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Salt Tectonics
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Salt Domes and Stratigrahic Traps
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IRANIAN SALT DOMES
Abundand Stratigraphic traps for Fossil Fuel
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Continental Evaporites
Playa Lakes Near Death Valley
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North American Interior Lake Systems -no outlets
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Fin
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