Fig. 7: Multi-element discriminant plots and variation diagrams of picritic-boninitic-tholeiitic series rocks. | Nature Communications

Fig. 7: Multi-element discriminant plots and variation diagrams of picritic-boninitic-tholeiitic series rocks.

From: Alpine-style nappes thrust over ancient North China continental margin demonstrate large Archean horizontal plate motions

Fig. 7

a, b Variation diagrams for a global dataset of Archean and Phanerozoic picrites and boninites9 with our samples (blue) falling within the range for most elements and ratios. a Shows (Gd/Yb)cn vs. (Zr/Sm)pm, b shows Al2O3/TiO2 vs. (Zr/Sm)pm. c–f Chondrite- and primitive mantle-normalized diagrams for picritic-boninic and tholeiitic basalts. Normalization values from Sun and McDonough60. The gray lines represent reported IAT samples from the Zanhuang complex26; the fields for MORB-IAT-CAB (Middle Oceanic Ridge Basalt-Island arc tholeiite basalt-Calc-alkaline arc basalt) data are collected from the (1) 2640–2522 Ma MORB-IAT-CABs in the Fuxin terrane, western Liaoling61,62; (2) 2657–2523 Ma MORB-IAT-CABs in the Shaqiaohe-Zhuzhangzi-Shangying terrane, Eastern Hebei63,64,65; (3) 2658–2550 Ma IAT in Sanhuangzai Terrane, Dengfeng complex66. Our data is shown by the solid blue and red lines (data is in Supplementary Note 2).

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