BUZZ-Australia's Sandfire Resources up; raises stake in Canadian copper miner
** Gold miner Sandfire Resources NL's shares rise 2.5 pct to A$5.640
** Sandfire says it raised its stake in Canadian copper miner Tintina Resources to 57 pct from 36 pct
** Says the additional stake was acquired at a total consideration of A$3.7 mln ($2.64 mln)
** Stock had gained 20.9 pct this year as of Wednesday's close
($1 = 1.4023 Australian dollars) (Reuters Messaging: email@example.com)
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