Surface Area/Grain Size Relations


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Surface Area/Grain Size Relations




Changes in Surface Area as a Function of Grain Size



Influence of Grain Mineralogy on Surface Area



Influence of Coatings on Surface Area

  • Sand-sized and Larger seds.: grain coatings composed of carbonates, Fe & Mn oxides and hydroxides, and organic matter are rough in comparison to surface of the underlying particles.

    • Coatings may comprise <5% by weight, but account for significant portion of the total surface area.


Grain Size vs. Concentration



Grain Size vs. Concentration







Metals per unit Mass

  • Some deposits may contain so little fine-grained material that the bulk of the metal contaminant per unit mass is found in the sand-sized fraction.



















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