Agrawal, Salil (1999) Geochemical Discrimination Diagrams: A Simple Way of Replacing Eye-Fitted Field Boundaries With, Probability Based Classifier Surfaces. Journal Geological Society of India, 54 (4). 335-346 doi:10.17491/jgsi/1999/540401
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Geochemical Discrimination Diagrams: A Simple Way of Replacing Eye-Fitted Field Boundaries With, Probability Based Classifier Surfaces | ||
| Journal | Journal Geological Society of India | ||
| Authors | Agrawal, Salil | Author | |
| Year | 1999 (October 1) | Volume | 54 |
| Page(s) | 335-346 | Issue | 4 |
| Publisher | Geological Society of India | Place | Bangaluru, India |
| URL | |||
| DOI | doi:10.17491/jgsi/1999/540401Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 19368584 | Long-form Identifier | mindat:1:5:19368584:2 |
| GUID | 0 | ||
| Full Reference | Agrawal, Salil (1999) Geochemical Discrimination Diagrams: A Simple Way of Replacing Eye-Fitted Field Boundaries With, Probability Based Classifier Surfaces. Journal Geological Society of India, 54 (4). 335-346 doi:10.17491/jgsi/1999/540401 | ||
| Plain Text | Agrawal, Salil (1999) Geochemical Discrimination Diagrams: A Simple Way of Replacing Eye-Fitted Field Boundaries With, Probability Based Classifier Surfaces. Journal Geological Society of India, 54 (4). 335-346 doi:10.17491/jgsi/1999/540401 | ||
| In | (1999, October) Journal of the Geological Society of India Vol. 54 (4). Geological Society of India | ||
| Abstract/Notes | Abstract The subjective, eye-fitted, field boundaries in geochemical discrimination diagrams constitute one of the possible reasons for their often-noted inability to determine the source regime/tectonic environments of igneous rocks. A simple method is described here to replace the eye-fitted field boundaries between the groups with the probability based classifier surfaces. It involves projection of the assignment rules obtained from linear discriminant analysis onto the binary or ternary discrimination diagram of raw variables. The method is illustrated by obtaining classifier surface between I- and S-type granites in Na2O-K2O space and between Anorthosite/Rapakivi (AR) and Ring Complex (RC) granites in Na2O-MgO space. The need for explicitly ensuring adequacy of samples, selection of suitable variables, evaluation of rate of misclassification and a better understanding of the unique influence of tectonic environments on magmatic process is emphasized for optimizing the performance of the classifier surface. | ||
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