Sakshi posted an Question
September 16, 2021 • 13:43 pm 30 points
  • IIT JAM
  • Geology (GG)

Question..

101. Ca-poor pyroxene is: (1) Pigeonite (2) Omphacite (3) Enstatite (4) Jadiete 102.A amphibole which is characteristic of high temperature: (1) Edenite (2) Hornblende (3) Tremolite (4) Paragasite 103. A phase diagram with a specified bulk composition is known as (1) Isograde diagram (2) AFM diagram (3 ACF diagram (4) Pseudosection

1 Answer(s) Answer Now
  • 0 Likes
  • 1 Comments
  • 0 Shares
  • comment-profile-img>
    Saurabh 1 Best Answer

    101) It has to be Pigeonite, cuz it has Ca but in minimal amount or low Ca containing pyroxene. Note: Here Enstatite can't be the answer, because there is a difference between "Low Ca" and "No Ca".Enstatite don't really have Ca in it's composition, so no chance of considering it as a correct answer. 102) It has to be hornblende, which is characteristics of high temperature. 103) It has to be Pseudosection. Note: The same term you will encounter in masters pertaining to the resistivity survey, so there's a contrast between the one that you might have seen in Petrology/Mineralogy and the one you will see in geophysical survey/methods.

whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers