Nov 10 (Reuters) - A gold stream is "probably the most attractive" option for Canadian miner Turquoise Hill Resources as it seeks funding for a copper and gold project in Mongolia, the head of mine financing company Wheaton Precious Metals said on Tuesday.

Turquoise Hill last week began arbitration proceedings against its biggest shareholder Rio Tinto to seek "clarity" on financing for Oyu Tolgoi, one of Rio's biggest growth projects.

Streaming is a type of alternative finance that generally involves an upfront payment by the streamer to a miner, which repays the loan by supplying metal at a later date. (Reporting by Jeff Lewis Editing by Chris Reese)