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18-Geol-A1 Mineralogy and Petrology: December 2017

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

  1. Question 1 Garnet and Feldspar — Silicate Group Differences
  2. Question 2 Sulfide Ore Minerals — Zn, Cu, Ni, Fe, Pb
  3. Question 3 Evidence for Crystal Fractionation, Magma Mixing and Crustal Assimilation
  4. Question 4 Four Basic Agents of Metamorphism
  5. Question 5 Contact Metamorphism
  6. Question 6 A'a vs. Pahoehoe Lava — Formation and What They Reveal
  7. Question 7 Ophiolites — Formation and Preservation in the Geological Record
  8. Question 8 Metamorphism vs. Metasomatism — Exoskarn, Endoskarn and Hornfels
  9. Question 9 What Causes Melting in Different Tectonic Settings
  10. Question 10 Effusive vs. Explosive Eruptions
  11. Question 11 Cumulate Processes and Ultramafic Rocks — Bowen's Reaction Series
  12. Question 12 Carbonate Minerals

Start with Question 1 →

EGBC National Exam — Geological Engineering, 04-Geol-A1 Mineralogy and Petrology, 2017-Dec. Closed book; no calculator permitted. Part 1 requires all five 10-mark short-answer questions (50 marks); Part 2's page-1 header says "5 of the 8" while the page-3 instructions say "5 of the 7" and list exactly 7 questions (a source discrepancy noted on the exam page itself).

Reference texts: Klein & Dutrow, Manual of Mineral Science, 23rd ed. (silicate/sulfide/carbonate structural classification, mineral chemistry and formulas); Winter, Principles of Igneous and Metamorphic Petrology, 2nd ed. (magmatic differentiation, metamorphic agents/facies, volcanic processes, layered intrusions and cumulates, partial melting, ophiolites); Boggs, Petrology of Sedimentary Rocks, 2nd ed. (carbonate mineral diagnostics).