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Basic: Molar Ratios

Molar ratios are useful where variations in major and trace elements can be used to define packages that appear to have different sources or clay types. An example is displayed in Figure A where molar ratios have been used to help distinguish individual sand and shale packages from core in the McMurray Formation.

molar-1

Figure A. Elemental Ratio Log Suite from a Vertical Well in the McMurray Formation.