Deepali posted an Question
June 30, 2020 • 18:44 pm 10 points
  • IIT JAM
  • Geology (GG)

Amafic rock has 30 % diopside and 70% anorthite. on partial melting, the ratio of diopside and anorthite in the first melt is (upto 2 decimal)

Amafic rock has 30 % Diopside and 70% Anorthite. On partial melting, the ratio of Diopside and Anorthite in the first melt is (upto 2 decimal)

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    Sajan sarthak Best Answer

    As diopside and anorthite is a binary Eutectic system what ever the bulk percentage may be if we heat the solid rock in which as per question 30 %diopside and 70% anorthite present they will melt for the first time at Eutectic point . so diopside anorthite eutectic percentage is An 42 Di 58 so ratio will be Di/An= 58/42=1.38 and remember the bulk solid composition does not matter..

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