Oct 16 (Reuters) - Yamana Gold Inc YRI.TO
* Yamana Gold announces preliminary third quarter 2017 operational results and provides update on brazilian tax matters
* Yamana Gold Inc - production from co's mines in Q3 was 257,000 ounces of gold
* Yamana Gold Inc - production from company's mines in Q3 was 1.43 million ounces of silver and 37.1 million pounds of copper
* Yamana Gold Inc - is evaluating whether or not to increase guidance relating to production for gold, silver and copper
* Yamana Gold-co's costs expected to be within previously provided guidance range "although presently, costs are trending well below top end of range"
* Yamana Gold - final approval by president of brazil related to a program in brazil to settle certain tax contingencies anticipated by Oct 31, 2017
* Yamana Gold-expects to recognize financial impact of adherence to amnesty program in Q3/Q4 reporting, accounting treatment in line with prior guidance
* Yamana Gold - for amnesty program, co has allocated $14.8 million for payments to make in next few weeks, plans to pay $29.3 million by end of year