Pyrite factors influencing

Variations Due to Geologic Factors. Ash chemistry is another important factor affecting elemental variations. Its influence is, however, generally more subtle than the other factors. In Table V the contents of selected elements are compared for Appalachian Province coals and Wasatch Plateau coals. Both are bituminous coals with similar ash contents. However, with a few exceptions, the content of the elements in the Wasatch coals is lower than those of Appalachian coals. The lower content of chalcophile elements in Wasatch coals may be due to a lower pyrite content. 

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