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MM > Otago Schist > Flashcards

Otago Schist Flashcards

1
Q

Terrane

A

Caples & Rakaia

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2
Q

Protolith

A

Caples - Volcanic Source (More Me/Fe), Rakaia - Continental source (More SiO2) - Quartzofeldspathic

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3
Q

Main Lithologies

A

Greywacke, Slate/Phyllite, Schist Gneiss

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4
Q

Age of Metamorphism

A

~160-145 Ma

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5
Q

Grades of Metamorphism Exposed

A

Prehnite Pumpellyite to Greenschist Facies

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6
Q

Zones

A

Greenschist - Garnet-Biotite-Albite-Chlorite P.P- Pumpellyite - Actinolite, Prehnite-Pumpellyite

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7
Q

Key Index Minerals for Different Grades

A

Muscoite, Zeolite, quarts, Albite, Chlorite, Actinolite, Garnet

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8
Q

Time that the Unit Reached the Surface:

A

~110 Ma

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MM (8 decks)

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