Oct 30 (Reuters) - Guyana Goldfields Inc GUY.TO :
* GUYANA GOLDFIELDS INC. REPORTS THIRD QUARTER 2018 OPERATIONAL AND FINANCIAL RESULTS; REVISED 2018 GUIDANCE
* GUYANA GOLDFIELDS - LOWERING PRODUCTION GUIDANCE TO 150,000 - 155,000 OUNCES OF GOLD FOR 2018
* GUYANA GOLDFIELDS INC - 2018 GOLD PRODUCTION GUIDANCE REVISED DOWNWARD TO 150,000-155,000 OUNCES
* GUYANA GOLDFIELDS INC - INITIATED A REVIEW OF UNDERLYING RESOURCE MODEL
* GUYANA GOLDFIELDS INC - ENGAGED RPA INC TO ASSIST IN INVESTIGATION OF GEOLOGIC CONTROLS AND GRADE VARIABILITY OF DEPOSIT
* GUYANA GOLDFIELDS INC SEES 2018 COST OF SALES FOR GOLD FROM $1,030 -$1,055 PER OUNCE
* GUYANA GOLDFIELDS INC - EXPECTS RESULTS FROM REVIEW TO BE INCORPORATED IN 2019 GUIDANCE
* GUYANA GOLDFIELDS INC - QTRLY AVERAGE MINING RATES IMPROVED BY 49% WHEN COMPARED TO PRIOR QUARTER
* GUYANA GOLDFIELDS INC SEES 2018 ALL-IN SUSTAINING COSTS FOR GOLD OF $1,025 -$1,050 PER OUNCE
* GUYANA GOLDFIELDS INC SEES 2018 CASH COST FOR GOLD OF $660 - $685 PER OUNCE FOR YEAR