BGYET-141 · December 2025 · English
IGNOU BGYET-141 December 2025 Previous Year Question Paper
ORE GEOLOGY AND INDUSTRIAL MINERALS
Structured previous year question paper for BGYET-141, December 2025 session.
Max marks: 50 · Questions: 4
Verified: 10 Aug 2026
BACHELOR OF SCIENCE (GENERAL)
(BSCG)
Term-End Examination
December, 2025
BGYET-141 : ORE GEOLOGY AND
INDUSTRIAL MINERALS
Time : 2 Hours Maximum Marks : 50
Note:
(i) All questions are compulsory.
(ii) Marks allotted for each question are
indicated against it.
(iii) Draw swell _——ilabelled = diagrams
wherever necessary.
Q1.Briefly answer any five of the following :
(a) Difference between reserves and resources
(b) Vickers hardness
(c) Ore deposition at hotspots
(d) Supergene enrichment
(e) Late magmatic deposits
(f) Skarn
(g) Volcanogenic Massive Sulphide deposits
(h) Banded iron formation
(i) Precious stones G) Greenfield exploration
Q2.Write short notes on any four of the following : 4x5=20
(a) Distribution of petroleum deposits in India
(b) Metallogenic epochs (०0) Stratiform type ore deposits
(d) Contact metasomatism (९) Baryte deposits
(f) Physical and diagnostic properties of gold
(g) Brownfield exploration
Q3.Answer any one of the following: 1x10=10
(a) Discuss ore deposits associated with the constructive and destructive plate boundaries.
(b) Explain the differences between syngenetic and epigenetic ore deposits.
Q4.Answer any one of the following: 1x10=10
(a)
(i) What is reserve estimation ? Discuss the different methods of reserve estimation.
(ii) Describe the deposits associated with early magmatic processes.
(b)
(i) What is a hydrothermal vent ? Differentiate between black smokers and white smokers.
(1) Discuss the various conventional geochemical exploration methods. 4x5=20 1x10=10