Correct Option
The correct option is 2 and 3 only.
Explanation
The distribution of minerals in India is closely linked to the country's geological structure. Metallic minerals are generally associated with old crystalline and metamorphic rocks, while non-metallic minerals are often found in sedimentary formations.
Statement-wise Analysis
- Statement 1 is Incorrect: Limestone is associated with sedimentary rocks of various geological sequences. While it is found in the Himalayan region, it is not strictly confined to it. Extensive limestone deposits are found in the Cuddapah and Vindhyan rock systems of Peninsular India. Major producing states include Rajasthan, Madhya Pradesh, Andhra Pradesh, and Gujarat.
- Statement 2 is Correct: Manganese deposits in India are primarily associated with the Dharwar rock system, which consists of old metamorphic rocks. These deposits are largely found in the peninsular region, with Odisha being a leading producer, followed by states like Karnataka, Madhya Pradesh, and Maharashtra.
- Statement 3 is Correct: Bauxite is the primary ore of aluminum and is formed by the decomposition of a wide variety of rocks rich in aluminum silicates. It is mainly found in areas of lateritic weathering, particularly on plateau regions and hill ranges. Major bauxite deposits are located in the Amarkantak plateau, Maikal hills, and the plateau region of Bilaspur-Katni.
Key Takeaway
Limestone is widely distributed in sedimentary formations (Vindhyan/Cuddapah); Manganese is linked to the ancient Dharwar system; and Bauxite is a residual deposit formed through lateritic weathering in plateau regions.