He wrote a strongly-worded letter to Governor SC Jamir, on June 21, requesting him to invoke his constitutional powers to protect the tribals' interest.
He claimed that the state government was "treating with scant respect" the Supreme Court's order on April 18.
The apex court had asked gram sabhas to take a decision whether Vedanta's US dollar 1.7 billion project can go ahead in the state's Niyamgiri hills and asked the tribal affairs ministry to act as the nodal authority.
"The convening of gram sabhas should not be limited to only 12 villages but cover all the affected villages in the region... Under the powers bestowed upon you under para 3 of the Schedule V to the Constitution, I urge you to kindly intervene and exercise your executive powers for the protection of tribals and marginalised sections residing in the state," he wrote to the governor.
Also Read
Mining in the Schedule V areas, in which tribals reside and they have been given special constitutional protection, has shaken the confidence and faith of the people in our democratic system, he said.
Vedanta spokesperson could not be reached for comments.