Is it possible to constrain presence of a high pressure low temperature metamorphism in absence of high pressure minerals like kyanite or pyroxenes?

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Federico Lucci

it depends on rock... in metapelites maybe you can search for carpholite...

Parita Gorania

Federico Lucci Thank you for your suggestion.

Gholamreza Fotoohi Rad

Yes I think it is possible specially when composition of source metamorphic rocks can not be suitable for formation of kyanite.