Reuters A gas flare on an oil production platform in Iran’s Soroush oil fields.Iran said late Thursday it was still opposed to a deal to lift oil output, fraying a growing sense of consensus among OPEC members and putting it at loggerheads with Saudi Arabia, the cartel’s de facto leader. The surprise move — after signals throughout the day that Iran was warming to an agreement — heightens uncertainty about whether Saudi Arabia can maintain discipline among members of the Organization of the Petroleum Exporting Countries as it seeks to dole out more oil to thirsty global markets. Riyadh has led OPEC in a pact with Russia and a handful of other non-OPEC members in whittling down a large surplus of crude that has kept prices low for years.via