STOCKHOLM, Dec 9 (Reuters) - Swedish mining group

Boliden said on Monday it had agreed to buy the

Neves-Corvo mine in Portugal and the Zinkgruvan mine in Sweden

from Lundin Mining ( LUNMF ).

It said in a statement it would pay $1.3 billion, plus

contingent payments that can reach up to $150 million, for the

mines.

"The transaction, that considerably strengthens Boliden´s

mine production as well as internal zinc and copper concentrate

supply, is subject to customary regulatory approvals," it said.