LONDON- Brazil's Vale SA is evaluating ways to exit its New Caledonia nickel operations and will make a decision in the first half of next year, an executive said on Wednesday.

Vale, the world's top nickel producer, plans to examine all options in divesting the unit, Luciani Siani, chief financial officer told an investors' presentation in London.

(Reporting by Eric Onstad and Barbara Lewis; Editing by Mark Potter) ((eric.onstad@thomsonreuters.com; +44 20 7542 7093; Twitter https://twitter.com/reutersEricO; Reuters Messaging: eric.onstad.thomsonreuters.com@reuters.net))