In which state are huge reserves of mineral oil located?

The correct answer is Assam.

Important Points

• Assam has a 27% of crude oil reserve, (which in highest onshore reserve) in India followed by Gujarat 19% and Rajasthan 5%.
• But Rajasthan accounts 27 % production of crude oil in India followed by Gujarat 13%.
• The state of Assam accounts for about 12.% of Indian Crude Oil output. 
• The Oil wells at Digboi, Duliajan and Sibsagar also produce natural gas.

Key Points

• Assam was the starting point from where the oil industry in India took to its wing way back in the 19th century.
• It was in 1889, when Well No.1 at Digboi, completed in 1890, yielded oil to make production commercially viable.
• In 1899, the Assam Oil Company was formed to take up the oil interest in the Digboi-Makum area. 

Additional Information

•  Rajasthan
  • Rajasthan is the 2nd latest mineral producing state in the country, sharing 9% of the country’s total mineral production.
  • The Mangala Area is a major oil field in Rajasthan that produces about 200,000 barrels of oil per day.
• Tamil Nadu
  • Major minerals including limestone, graphite, bauxite, iron ore, and vermiculite are abundant in Tamil Nadu.
  • Minor minerals include granites, clay, silica sand, and lignite. Fuel minerals include petroleum and natural gas.
  • Atomic minerals include monazite, rutile.
• Bihar 
  • Bihar does not have extensive mineral resources.
  • It does have some deposits of minerals like limestone, mica, pyrites, bauxite, and small quantities of copper ore.
  • These minerals are primarily found in areas such as Rohtas, Kaimur, and Munger districts.