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Earth and Space Sciences · 术语表

什么是 Discrimination diagram?

Definition 9.8 University Earth and Space Sciences — Year 2 · 第 9 章 — Magmatic Series and Tectonic Settings

A discrimination diagram is a diagram of chemical variables, usually immobile trace elements, divided into fields drawn around the compositions of rocks from known settings, used to assign a setting to a rock of unknown origin.

The Ti–Zr–Y diagram of Pearce and Cann (1973) with the basalts of known setting. A island-arc tholeiites; B MORB, island-arc tholeiites and calc-alkali basalts; C calc-alkali basalts; D within-plate basalts. Ti from TiO2; all three in ppm.
The Ti–Zr–Y diagram of Pearce and Cann (1973) with the basalts of known setting. A island-arc tholeiites; B MORB, island-arc tholeiites and calc-alkali basalts; C calc-alkali basalts; D within-plate basalts. Ti from TiOX2\ce{TiO2}; all three in ppm.
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