Oyu Tolgoi co-owner responds to activist shareholder SailingStone
Turquoise Hill will "review the cause and impact"
Other majors lower
Trump to delay tariff deadline
Mining equities gain
Lundin up, Sandfire Resources down
Miners mixed on markets
Record level of underground development in June
Calls for secure investment climate
Rio CEO tells conference it is a significant issue facing the industry
SailingStone Capital Partners say Turquoise Hill needs more independent management, more OT info
"No indication ... to suggest ... Oyu Tolgoi is a subject of the investigation," Turquoise Hill says...