Under current laws, a company cannot sell mines but only transfer leases when it is acquired by another firm
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/firms-may-sell-mines-under-proposed-changes-mining-law
[2] http://admin.indiaenvironmentportal.org.in/category/author/jyoti-mukul
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bharat-aluminium-company-balco
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-mines
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mineral-based-indsutry