Explanation:

The iron ore deposits in the region are found to contain a low proportion (41 per cent and below) of iron. Besides, a very large quantity of ore has also not been found to be located at one place. Based on survey conducted by the Ministry, explorations have found iron ores deposits in Dhubri district in an around the hills of Bilasipara, especially at Chandardinga hills. Its estimated reserve is put at 17 million tonnes. Low grade iron ore are also found in Langupara, Kumri etc.