Patriot Battery Metals (ASX:PMT) discovered a large zone of cesium mineralization at CV13 pegmatite, part of its Shaakichiuwaanaan project in Canada, through a review of its drill core assay dataset, according to a Monday filing with the Australian bourse.

The primary zone of enrichment can be traced in drill holes over an area of about 600 meters by 400 meters and remains open in several directions. A second mineral zone located at the pegmatite is estimated to be 250 meters by 50 meters and up to several meters thick, the filing said.

A mineralogical program focused on areas of cesium enrichment in the area is in progress, according to the filing.

Shares rose 4% in midday trade Monday.