New discrimination diagrams for basalts based on big data research

Figures & data

Figure 1. Some classical basalt tectonic environment discrimination maps commonly used in the literature (according to Liu et al., 2017). (a) TiO₂-MnO-P₂O₅（Mullen, 1983）； (b) Ti/Y-Nb/Y (Pearce, 1982)； (c) V-Ti (Shervais, 1982)； (d) Ta-Th-Nb(Ta) (Wood, 1980)； (e) Th/Yb-Ta/Yb (Pearce, 1982).

Figure 2. Discrimination diagrams for tectonic settings of basalts. (a) Sc × 10/Sr vs. Ga/Nb; (b) Nb/Y vs. K₂O × 100/Cu; (c) Sr/V vs. Na₂O × 100/Ga; (d) Y/La-Nb/Yb-Th/Ta; (e) Ba/Nb-La/Ta-Sr/Y; (f) Ba/Nb-Li/Ta-Sr/Y.

Figure 3. Sc × 10/Sr vs. Ga/Nb，Nb/Y vs. K₂O × 100/Cu and Sr/V vs. Na₂O × 100/Ga tectonic environment discrimination diagrams for basalt.

Liu, X. L., Zhang, Q., Li, W. C., Yang, F. C., Zhao, Y., Li, Z., … Du, X. L. (2017). Applicability of large-ion lithophile and high field strength element basalt discrimination diagrams. International Journal of Digital Earth, 1–9.

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Mullen, E. D. (1983). MnO/TiO2 /P2O5: A minor element discriminant for basaltic rocks of oceanic environments and its implications for petrogenesis. Earth & Planetary Science Letters, 62, 53–62.

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Shervais, J. W. (1982). Ti-V plots and the petrogenesis of modern and ophiolitic lavas. Earth and Planetary Science Letters, 59, 101–118.

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Wood, D. A. (1980). The application of a Th, Hf, Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British tertiary volcanic province. Earth & Planetary Science Letters, 50, 11–30.

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