Shivam Sharma posted an Question
August 31, 2020 • 22:12 pm 30 points
  • CSIR NET
  • Earth Sciences

The following figure shows various metamorphic facies in p-t space (numbered as domains i to x). in this figure, name the domains and the corresponding facies i

The following figure shows various metamorphic facies in P-T space (numbered as domains I to X). In this figure, name the domains and the corresponding facies in which the following two mineral assemblages would stabilize by metamorphism of basic rocks: (lawsonite + jadeite) & (prehnite + pumpellyite). Which domain and corresponding facies will NOT contain plagioclase feldspar in metamorphosed basic rocks? Explain why. Temperature ("C) 00 200 u 400 S00 600 700 800 9 VIl VITI 6 8

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    Rahul kumar Best Answer

    Refer to tha attached figure for naming of different facies domain Lawsonite + Jadeite assemblage would be stable in blueschist facies i.e. zone X in the facies diagram Prehnite + pumpellyite assemblage would be stable in prehnite-pumpellyite facies i.e. zone six in the facies diagram Plagioclase will not occur in eclogite facies (zone Xl) for basic rocks. Please refer to the attached figure for protolith type and specific mineral assemblage in particular facies.

    cropped9145690705437793983.jpg
    cropped8624885125984429714.jpg
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    Sajan sarthak best-answer

    see this figure x is for lawsonite and jadeite that is blueschist facies ..vi is for prehenite pumpellite

    cropped2174585393499764318.jpg
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