Anukruti posted an Question
November 27, 2020 • 23:20 pm 30 points
  • IIT JAM
  • Geology (GG)

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    Sajan sarthak Best Answer

    Discontinuous is the left ,arm/part Bowen's reaction series so Aluminum replacing sillica will increase as magma cools,. Olivine has no alumina neither pyroxene nor amphibole but biotite mica have.and in their structure tetrahedral sillica is replaced by tetrahedral aluminum... so Increases

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    Rahul kumar best-answer

    Answer: (A) Always increases In dis-continuous series of Bowens reaction series the extent of replacement of Si by Al (tetrahedral sites) increases from Olivine --> Pyroxene --> Amphiboles --> Biotite.

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