Figure 10 | Scientific Reports

Figure 10

From: Contrasting mineralized and barren porphyries in the Zhongdian Arc, insights from biotite and apatite compositions and halogen fugacity

Figure 10

(a–d) Cogenetic assemblage of biotite-magnetite-K-feldspar under microsxope (a PL1202; b LD07; c,d SN36); (e) Fe3+–Fe2+–Mg diagram (after reference75), QFM = quartz-fayalite- magnetite buffer, NNO = nickel-oxide nickel buffer, and HM = hematite-magnetite buffer; (f) Log f O2 versus temperature diagram (after reference44). Temperature is calculated by Eq. (2), and log fO2 is calculated by the method proposed by Ridolfi72; (g) H2O content vs. ΔFMQ diagram. The H2O content is calculated by Eq. (6). The ΔFMQ is calculated by Geo- f O2 software developed by Li76.

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