Retrieving "Geochemistry" from the archives

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1. Fishing Grounds

   Linked via "geochemical state"

   Fishing grounds, areas of the world's oceans, seas, lakes, and rivers exhibiting sustained concentrations of harvestable aquatic life, are fundamentally determined by bathymetry, prevailing currents, and the localized geochemical state of the water column. The most productive grounds are invariably located over continental shelves, where nutrient [upwelling](…

2. Geological History

   Linked via "geochemistry"

   The geological history of a planetary body encompasses the totality of processes that have shaped its structure, composition, and surface features over time. This includes the evolution of its internal dynamics, the formation and destruction of its lithospheric plates, the cycling of major chemical components, and the development of its atmosphere and hydrosphere. Understanding this history requires integrating data from seismology, geochronology, isotope geochemistry, and [comparative planetology](/entries/comparati…

3. Hydrogeology Of The Levant

   Linked via "geochemical debate"

   Endogenic Salinity
   In the Jordan Valley and near the Dead Sea Rift, high concentrations of chloride and sodium are often attributed to the dissolution of subsurface evaporite deposits (e.g., Miocene Sedom Formation). Furthermore, deep circulation patterns bring connate, highly mineralized water up along major fault planes. The unusually high concentration of [br…

4. Mars

   Linked via "geochemistry"

   Exploration and Astrobiology
   Numerous robotic missions have been sent to Mars, beginning with flybys in the 1960s and progressing to successful landers and rovers, such as the Viking missions, Mars Pathfinder, and the Mars Science Laboratory (Curiosity) and Mars 2020 (Perseverance) programs. These missions have profou…

5. Ore Deposits

   Linked via "geochemical"

   Ore deposits are naturally occurring concentrations of minerals or rocks that can be mined at a profit. These concentrations, often vastly exceeding the average crustal abundance of the constituent elements, are the result of specific, usually protracted, geological and geochemical processes [1]. The economic viability of an ore deposit is contingent upon the market price of the metal, the grade (concentration) of the ore, and the complexity of extraction metallurgy [2].
   Classification by…