Which of the following regions of India is almost devoid of economic minerals?a)The Himalayan beltb)The alluvial plains of North Indiac)The Thar desertd)The Peninsular plateauCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

The correct answer is B as The most striking feature of the Indian minerals is their uneven distribution. Some areas are very rich in minerals while some others are completely devoid of this valuable asset.Minerals are rarely found in Northern plains of India.

Answer

First we we have to know the economic minerals the meaning of economic mineral those minerals which are used in economic nomic purpose like iron , copper , coal , graphite ,etc .now let's understand every option
1. in Himalayas belt there is very high chance of ore of copper , cobalt and store of fossils also like coal etc.
2. In alluvial plains there is not very high source of economic minerals like copper , iron ,cobalt , coal etc.
there may be some presence of minerals which are used in construction work some rocks etc. but not much high
3. In Rajasthan Side there is very large deposit of sedimentary rock for building materials granite sandstone gypsum etc. in Gujarat Rajasthan side large deposit of petroleum is there
4. Obviously all important mineral are found there coal, iron , gold , diamond , graphite, nickle etc .
Hence B is correct I hope this will help u

Answer

Introduction:
India is a country rich in mineral resources, with various regions known for their abundance of economic minerals. However, there are certain regions that are almost devoid of such minerals. One such region is the alluvial plains of North India.

Alluvial Plains of North India:
The alluvial plains of North India, encompassing the states of Punjab, Haryana, Uttar Pradesh, and Bihar, are characterized by the deposition of sediments brought by rivers like the Ganges, Yamuna, and Brahmaputra. These sediments, carried downstream from the Himalayas, consist mainly of fertile soil, making the region highly suitable for agriculture.

Lack of Economic Minerals:
1. Geological Composition: The alluvial plains primarily consist of alluvium, which is a mixture of clay, silt, sand, and gravel. However, economic minerals like coal, iron ore, manganese, bauxite, and limestone are not found in significant quantities in these sediments.

2. Origin of Deposits: The alluvial plains were formed by the deposition of sediments eroded from the Himalayas over millions of years. These sediments were primarily derived from weathered rocks and glacial deposits. Since the Himalayan region itself is not known for its rich mineral deposits, the alluvial plains also lack significant mineral resources.

3. Dilution Effect: The sediments deposited in the alluvial plains are a mixture of materials eroded from various sources. This dilution effect further reduces the concentration of economic minerals in the sediment, making their extraction economically unviable.

Conclusion:
The alluvial plains of North India, though highly fertile for agriculture, are almost devoid of economic minerals. The region's geological composition, origin of deposits, and dilution effect contribute to the lack of significant mineral resources. However, it is important to note that this region is still crucial for India's agricultural productivity and plays a vital role in the country's food security.

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