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Petrology > Metamorphism of pelitic/mafic rocks > Flashcards

Metamorphism of pelitic/mafic rocks Flashcards

1
Q

What system/classification does pelitic metamorphiv rock follow?

A

The Zarrovian zones
- w. index minerals and isograds

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2
Q

What is the first reaction on the pelitic rocks way?

A

Chlorite zone:
Prl -> Ky (+ Qrt + H2O)
- Polymorphic reaction?

  • not kyanite zone yet - not enough rocks with Al to stabilize Ky
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3
Q

What is the secund reaction on the pelitic rocks way?

A

Biotite zone:
Makes chloritoide

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Petrology (15 decks)

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