TRILINEAR DIAGRAM REVISITED: APPLICATION, LIMITATION, AND AN ELECTRONIC SPREADSHEET PROGRAM |
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| Authors: | Songlin Cheng |
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| Institution: | Laboratory of Isotope Geochemistry, Department of Geosciences, University of Arizona, Tucson, Arizona 85721. |
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| Abstract: | Abstract. The trilinear diagram has been used extensively in hydrochemical studies. The concept of hydrochemical facies based on the trilinear diagram can effectively characterize the chemical composition of water in a qualitative manner. However, its application is rather limited for quantitative and precise study, because it is difficult, if not impossible, to distinguish various mechanisms that may cause similar change in water chemistry by this diagram alone. This limitation is illustrated with various hypothetical water-rock interactions and mixing trends plotted on the trilinear diagram. |
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