Sept 9 (Reuters) - Calibre Mining Corp CXB.V :
* Calibre and Centerra Gold sign option agreement on the La Luz project,
nicaragua
* Centerra can earn a 51% interest and an additional 19% for a total of 70%
interest in the La Luz gold-silver project
* Says Centerra must invest $3.0 million in exploration on the property from
signing to December 31, 2017
* Says commitment to commence a drilling program in 2015
* Source text for Eikon ID:nMKW9JGx1a
* Further company coverage CXB.V