Oct 25 (Reuters) - Independence Group Nl IGO.AX
* Qtrly tropicana gold production 114,060 ounces versus 110,509 ounces in 4Q17
* Nova expects production at 1.5mtpa nameplate rate for December 2017 quarter
* Qtrly profit after tax a$4.7mln versus loss of A$15.5 million in 4Q17