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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Amber Richhariya posted an Question
November 11, 2021 • 17:59 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
The following table shows modal abundance and mineral composition data of a plutonic igneous rock. the amount of sio2 in bulk composition of the rock is decimal
The following table shows modal abundance and mineral composition data of a plutonic igneous rock. The amount of SiO2 in bulk composition of the rock is decimal places). %. (Round off to two Mineral Olivine Mode (%) Sio: (wt. %)| Ca0 (wt. %)_Mg0 (wt. %) 45 b6 20 Cinopyroxene Orthopyroxene
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Saurabh 1![best-answer]()
You just have to use simple formula for net amount from mode value(in percentage) of the mineral multiplied with the respective component. Amount of SiO2=[(45×34)+(35×55) +(20×58)]/100 Amount of SiO2 in rock(in%) = 4615/100= 46.15%. So answer is = 46.15(upto two decimal place)