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Figure 3

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

Figure 3

Petrographic characteristics of samples. (a) PL03 quartz monzonite porphyry with phenocrysts of plagioclase, K-feldspar, biotite and minor amphibole; (b) PL03 apatite coexisting with a biotite phenocryst; (c) PL3207 biotite inclusion in a plagioclase phenocryst; (d) PL3207 titanite and magnetite inclusion in biotite; (e) LD01 phenocryst biotite in a quartz monzonite porphyry of the LD deposit; (f) SN24 phenocryst biotite in a quartz monzonite porphyry of the SN prospect; (g) SN125 biotite inclusion in a quartz phenocryst; (h) PL1202 apatite occurring in the middle or margin of biotite; (−): plane polarized light; (+) cross polarized light; (BSE): back-scattered electron image; Pl: plagioclase; Bt: biotite; Amp: amphibole; Qz: quartz; Kfs: K-feldspar; Ap: apatite; Ttn: titanite. Mag: magnetite; Chl: chlorite.

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