Topic 11 evaporite salt deposits
Evaporation, PROCESS, Environments, minerals, FORMATION, types, marine, lakes, inland, Dead Sea, Salt,lakes, alkali lakes, potash lakes, Evaporite Deposits, resources and reservesPROCESS OF MINERAL FORMATION BY EVAPORATION, ENVIRONMENTS FOR EVAPORITE PRECIPITATION, Marine Evaporites, Barred Basins, Non-marine, Continental, Inland lakes, Evaporites, CHEMISTRY OF EVAPORITES, Evaporation Sequence of Seawater, Evaporation of Seawater , Rates of Evaporite Deposition, EVAPORATE MINERALS, DIAGENESIS OF EVAPORITES, DEPOSITION FROM OCEANIC WATERS, Calcium Sulfate Deposition, Salt (Halite) Deposition, Salt Domes, Potash Deposition, World Potash Mine Production, Potash Deposits in Dead Sea, Borate and Bromine Deposition, DEPOSITION FROM CONTINENTAL WATERS AND INLAND LAKES, MAJOR IONS OF INLAND WATERS, EVAPORATION SEQUENCE OF INLAND LAKES, DEPOSITION FROM INLAND LAKES, Deposition from Salt Lakes, Salton Sea California, Deposition from Alkali (or Soda) Lakes, Deposition from Bitter Lakes, Sulfate lakes, Deposition from Potash Lakes, Deposition from Borate Lakes, MODELS FOR EVAPORITE SEDIMENTATION, EVAPORITE FORMATION
More Related Content
What's hot
What's hot (20)
Viewers also liked
Viewers also liked (20)
More from Geology Department, Faculty of Science, Tanta University
More from Geology Department, Faculty of Science, Tanta University (20)
Recently uploaded
Recently uploaded (20)
Editor's Notes
- Back in 1849 an Italian chemist named Usiglio made a classic, widely cited, but somewhat misleading experiment on evaporite deposition. He took a volume of 1: Potassium and magnesium salts (kainite, carnallite, sylvite). Typenormal sea water and slowly evaporated it, and kept track of the composition and mass of precipitated salts as a function of extent of evaporation.An ideal evaporite sequence (in decreasing order of solubility) is as follows: Type 2: Rock salt (halite). Type 3: Gypsum (<42°C) or anhydrite (>42°C). Type 4: Calcite and dolomite. As evaporite beds of types 1 and 2 consist of highly soluble minerals, they are commonly re-dissolved by the influx of new salt-water. To be preserved, they must be covered over quickly by an impervious layer. Since sea-water only contains 31 parts per thousand of dissolved salts, even evaporation of large areas of sea-water will only result in the deposition of a thin evaporite layer. For thick, economically viable evaporite layers to be deposited, a continuous evaporation-replenishment system must operate.