Geochemical Comparison CM

Title: Geochemical Comparison CM
Description: The majority of the major elemental components show very similar trends. The highly compatible elements, MgO and FeO follow the same downward trend in both New Zealand and the Aleutian arc. The incompaitble K2O shows the same upward trend in both systems. The one major element that shows deviation is Na2O, which becomes a compatible element in the more evolved melts in the New Zealand system, but never becomes compatible in the Aleutian Arc system.

Both systems have sub-alkaline compositions, which is characteristic of convergent margins. They are also heavily calc-alkaline, but New Zealand has some samples that are considered tholeiitic. The ternary diagrams show that both systems have a very evolved melt system, leaning towards the Alkali saturation. They also share the same REE trends, having more of the incompatible elements, and fewer compatible elements.
Creator: William DeBarba, Cullen Scheland
Mediator: Tamara Carley (carleyt@lafayette.edu)

Media: https://exhibits.lafayette.edu/omeka/files/original/d636bba5ad8eb81ca56bc9dd83308d12.pdf; https://exhibits.lafayette.edu/omeka/files/original/207133cf6de3f0338bf53cf46247ef74.pdf; https://exhibits.lafayette.edu/omeka/files/original/7fbe15c87d2a58993df01970817579a7.pdf; https://exhibits.lafayette.edu/omeka/files/original/9cf5e86a5ef8bca84cbab16478010b24.pdf; https://exhibits.lafayette.edu/omeka/files/original/8e2280e2645556c09f3d65559b75bc4a.pdf; https://exhibits.lafayette.edu/omeka/files/original/b4deeb421e241acf5b73c32567b1f3ee.pdf; https://exhibits.lafayette.edu/omeka/files/original/5881690d67e4daadcbbf025107830249.pdf; https://exhibits.lafayette.edu/omeka/files/original/9bb0fc22174bdf036568eee803b1a021.pdf; https://exhibits.lafayette.edu/omeka/files/original/1ccc7ec218a84ce8c42b01ea5851c81a.pdf; https://exhibits.lafayette.edu/omeka/files/original/775bf763c29898423cb833759d8b6f30.pdf; https://exhibits.lafayette.edu/omeka/files/original/bcf9a39026b4340f451ee64878e2a3ec.pdf