Company is considering listing its shares in Oslo this year after signing a deal with local officials to build the world's first fully electric copper mine in the Arctic.
Major miners need to increase spending to secure fresh copper supply, analysts say, amid worries that availability of the red metal will slide just as demand surges.
Police opened fire to beat back the protesters in the southern seaside town of Thoothukudi where 13 people were killed, causing national outrage and the subsequent closure of the Sterlite Copper plant.