Aug 2 (Reuters) - Silver Wheaton Corp SLW.TO :
* Silver Wheaton Corp says will pay upfront cash consideration of us$800 million for increased gold stream
* Intends to use cash on hand together with proceeds available under co's $2 billion revolving credit facility to pay upfront cash payment of us$800 million
* In 2016, estimated attributable gold production is now forecast to be 305,000 ounces, up from 265,000 ounces previously
* Silver Wheaton increases its gold stream from salobo mine and revises production guidance
* Silver Wheaton Corp says its unit has agreed to acquire from unit of Vale S.A. Amount of gold equal to 25% of life of mine gold production from its salobo mine
* Silver production in 2016 is now forecast to be approximately 32 million ounces, down slightly from 32.8 million ounces previously guided
* Average annual attributable gold production over next 5 yrs anticipated to be about 330,000 ounces of gold a year, up from 260,000 ounces Source text for Eikon: ID:nCNWnLJ2Sa Further company coverage: SLW.TO
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