Garnet
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| Calcsilicate rock (clinopyroxene, anorthite, grossular, quartz, titanite) |
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| Angul, Eastern Ghats, Orissa, India |
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| Source: Thin section collection M.M. Raith |
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| Photos: MMR |
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Comments and references:
Two-stage reaction textures: (1) symplectitic intergrowth of clinopyroxene and anorthitic plagioclase, formed via the breakdown of porphyroblastic garnet according to the reaction Grs + Qz → Cpx (symplectitic) + An; (2) coronal garnet+quartz separating symplectitic clinopyroxene from anorthitic plagioclase due to reversed crossing of the same reaction, i.e. Cpx (symplectitic) + An → Grt (coronal) + Qz. Reaction texture (1) was formed during steep UHT/HT-decompression; reaction texture (2) during subsequent near-isobaric cooling. |
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| PPL |
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| +Pol |
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| Additional images |
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| Width of view |
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Pol orientation |
| 2 mm |
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W-E |
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Garnet |
Images
Mineral data |
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