| Reference Type | Journal (article/letter/editorial) |
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| Title | Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Ross, Pierre-Simon | Author |
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| Bédard, Jean H. | Author |
| Year | 2009 (November) | Volume | 46 |
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| Page(s) | 823-839 | Issue | 11 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e09-054Search in ResearchGate |
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| Mindat Ref. ID | 484476 | Long-form Identifier | mindat:1:5:484476:5 |
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| GUID | 8004d32a-46fe-4e72-ae1f-07ea2af8a9b4 |
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| Full Reference | Ross, Pierre-Simon, Bédard, Jean H. (2009) Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams. Canadian Journal of Earth Sciences, 46 (11) 823-839 doi:10.1139/e09-054 |
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| Plain Text | Ross, Pierre-Simon, Bédard, Jean H. (2009) Magmatic affinity of modern and ancient subalkaline volcanic rocks determined from trace-element discriminant diagrams. Canadian Journal of Earth Sciences, 46 (11) 823-839 doi:10.1139/e09-054 |
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| In | (2009, November) Canadian Journal of Earth Sciences Vol. 46 (11) Canadian Science Publishing |
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| Abstract/Notes | When dealing with ancient subalkaline volcanic rocks, the alkali – total iron – magnesium (AFM) diagram is of limited use in assigning a tholeiitic versus calc-alkaline affinity because these elements are often mobile during alteration and metamorphism. Classification diagrams using immobile trace elements are preferable but need to be tested and optimized on unaltered rocks. To this end, a geochemical database containing over a thousand, presumed unaltered, subalkaline volcanic samples from young oceanic arcs was assembled. The data were classified using both major and trace-element approaches, and the results were compared. If the calc-alkaline and tholeiitic fields on the AFM diagram are used to define magmatic affinity, then the commonly used Zr versus Y, La versus Yb, and Th versus Yb discriminant diagrams misclassify 39%, 24%, and 28% of samples, respectively. After optimization (using a number of criteria), all three trace-element classification diagrams produce results that are generally consistent with the AFM diagram. The optimized diagrams only misclassify 7%, 11%, and 12% of the samples, respectively. A new Th/Yb versus Zr/Y diagram has a better overall performance than any single ratio diagram and may prove helpful in assigning magmatic affinities to volcanic rocks in ancient successions. |
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These are the references the publisher has listed as being connected to the article. Please check the article itself for the full list of references which may differ. Not all references are currently linkable within the Digital Library.
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