BUZZ-Turquoise Hill Resources: Mongolia, Rio Tinto near Oyu Tolgoi deal
** Canadian miner's U.S-listed shares up 8.6 pct at $3.52 in heavy trading, among top pct gainers on the NYSE
** Shares track increases on Toronto-listed shares
** Mongolian PM says talks between government and investors progressing towards the close of deals on the $6.5 bln Oyu Tolgoi copper mine
** Cost and tax disputes have delayed construction of the second underground phase at mine since August 2013
** Turquoise Hill, majority owned by Rio Tinto , owns 66 pct of the mine; Mongolia owns the rest
** Up to Thursday's close, Turquoise Hill's U.S.-listed stock had risen 4.5 pct this year
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