BRIEF-Sabina Gold & Silver updates mineral resource estimate for Back River Gold project

March 4 (Reuters) - Sabina Gold & Silver Corp SBB.TO :

* New estimate consists of a measured mineral resource of 10.4 million tonnes

grading 5.2 g/t for a contained 1,761,000 ounces au

* Reports updated mineral resource estimate for the Back River Gold project,

Nunavut

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