Hindustan Zinc Limited (BSE:500188) has put its wind energy assets on the block, according to sources aware of the matter. The assets are valued at around INR 15 billion and were described as 'non-core' by an executive aware of the company's plans. One of the big four audit firms is said to be assisting on the sale. The wind power plants are located in five states " Rajasthan, Gujarat, Maharashtra, Karnataka and Tamil Nadu. A Vedanta group spokesperson said in an emailed response to ET's queries, “We are in the regulatory delisting process and cannot give forward looking statements”. The funds will come in handy to assist a delisting process announced by parent Vedanta, according to a person aware of the matter.