Silver Wheaton signs deal with Augusta Resource

(In U.S. dollars)

TORONTO, Dec 20 (Reuters) - Silver Wheaton Corp SLW.TO said on Thursday it had agreed to buy between 45 percent and 90 percent of the life-of-mine silver to be produced by Augusta Resource Corporation's AZC.TO Rosemont Copper Project.

Silver Wheaton said it will pay between $135 million and $165 million to acquire 45 percent of the payable silver, or $240 million to $320 million to acquire 90 percent of the payable silver, produced for the life-of-mine.

The price is subject to the finalization of the structure of the transaction, including tax considerations. ($1=$1.00 Canadian) (Reporting by John McCrank; editing by Janet Guttsman) (; +1 416 941 8083; Reuters Messaging: