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18-Geol-A1 Mineralogy and Petrology: May 2017

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Olivine, Amphibole and Pyroxene — Silicate Group Differences
  2. Question 2 Mineral Examples for Mg, Fe, Ca, Na, K and Al
  3. Question 3 Evidence for Crystal Fractionation, Magma Mixing and Crustal Assimilation
  4. Question 4 Four Basic Agents of Metamorphism
  5. Question 5 Regional Metamorphism
  6. Question 6 Ignimbrites — Formation and Internal Stratigraphy
  7. Question 7 Komatiites — Formation and Absence of Modern Analogues
  8. Question 8 Metamorphism vs. Metasomatism — Exoskarn, Endoskarn and Hornfels
  9. Question 9 Melting Mechanisms by Tectonic Setting
  10. Question 10 Effusive vs. Explosive Eruptions
  11. Question 11 Calc-Alkaline vs. Tholeiitic and Alkaline Rock Series — AFM Diagram
  12. Question 12 Three Controlling Factors on Magma Viscosity
  13. Question 13 Three Types of Igneous Layering

Start with Question 1 →

EGBC National Exam — Geological Engineering, 04-Geol-A1 Mineralogy and Petrology, 2017-May. Closed book; no calculator permitted. Part 1 requires all five 10-mark short-answer questions (50 marks); Part 2 lists eight questions with instructions to answer "5 of the 7" (a source discrepancy noted on the exam page itself).

Reference texts: Klein & Dutrow, Manual of Mineral Science, 23rd ed. (silicate structural classification, mineral chemistry/formulas); Winter, Principles of Igneous and Metamorphic Petrology, 2nd ed. (magmatic differentiation and mixing, metamorphic agents/facies, volcanic processes, phase equilibria and AFM projections, magma viscosity, layered intrusions, tectonic melting mechanisms).