May 18 (Reuters) - Trevali Mining Corp TV.TO :
* TREVALI SHAREHOLDERS APPROVE ACQUISITION OF GLENCORE'S AFRICAN ZINC MINES
* TREVALI MINING CORP SAYS SHAREHOLDERS APPROVE ACQUISITION OF GLENCORE'S AFRICAN ZINC MINES Source text for Eikon: ID:nCCN2s77l1 Further company coverage: TV.TO