Mineral Formation


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Mineral Formation

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Mineral Formation

  1. 1. Mineral FormationMr. Thompsons Earth Science Class
  2. 2. Mineral FormationMr. Thompsons Earth Science Class
  3. 3. Mineral Formation • Mineral crystals grow as atoms are added to its surfaces, edges, or corners QuickTime™ and a decompressor are needed to see this picture.Mr. Thompsons Earth Science Class
  4. 4. Mineral Formation• Growth depends on: 1) What atoms are available in the surrounding area 2) How fast atoms can migrate to the crystal 3) Temperature and Pressure conditions of the surrounding area • Slower cooling allows for bigger crystals • Different minerals crystallize from the same solution at different temperatures. • Pressure conditions have to be right for mineral formationMr. Thompsons Earth Science Class
  5. 5. Mineral Formation• Minerals can form in various places 1) Precipitation in hot water -a solid forming in the water 1) From magma cooling 2) From evaporation of water QuickTim e™ and a decompressor are needed to see this picture.Mr. Thompsons Earth Science Class
  6. 6. Minerals from Hot Water• Some minerals are made from hot- water solutions that are rich in dissolved mineral matter• Example: Sugar will dissolve faster in hot water, but when the water cools, the sugar crystals will form again Mr. Thompsons Earth Science Class
  7. 7. Minerals from Hot WaterThis is one of the principles of crystallization: as the temperature of a liquid drops, the amount of solid ingredients it can hold in suspension drops as well. Mr. Thompsons Earth Science Class
  8. 8. Minerals from Hot Water• As the hot water cools, the atoms slow down and the atoms within can then form bonds• Minerals will often form around the edges of hot springs where the water is coolerMr. Thompsons Earth Science Class
  9. 9. Minerals from Hot Water Minerals also form in cracks of rocks where the water is cooler from the surrounding rock -Cracks in rock become lined with mineral matter Ex: veins can be found within rocks of concentrated minerals like gold, silver, or copperMr. Thompsons Earth Science Class
  10. 10. Minerals from Magma• Magma = molten rock found within the Earth• As magma cools the atoms begin to arrange into an orderly structure QuickTime™ and a decompressor are needed to see this picture.Mr. Thompsons Earth Science Class
  11. 11. Minerals from Magma• When the temperature of magma drops below the “solidification temperature” of a specific mineral, the crystals will begin to growMr. Thompsons Earth Science Class
  12. 12. Minerals from Evaporation • Minerals can form from water on the Earth’s surface • When water evaporated from solutions rich in minerals, the minerals are left behind when the water is goneMr. Thompsons Earth Science Class
  13. 13. The End Review at www.ScienceByThompson.comMr. Thompsons Earth Science Class