Tertiary Minerals plc announced that the Company has received positive laboratory assay results from its first drill programme at the Jacks Copper Project in Zambia, where it is earning a 90% joint venture interest. Significant copper mineralisation intersected in all four diamond drillholes: 22JKDD01: 13.5m grading 0.9% copper from 77.5m downhole, including 3.0m grading 1.7% copper from 79.5m, and 3.5m grading 1.2% copper from 87.0m; 22JKDD02: 7.0m grading 0.6% copper from 54.0m, and 3.0m grading 0.8% copper from 191.0m; 22JKDD03: 6.0m grading 1.8% copper from 105.0m, including 4.0m grading 2.4% copper from 106.0m; 22JKDD04: 14.0m grading 0.8% copper from 27.0m, including 2.0m grading 1.7% copper from 27.0m and 5.0m grading 1.0% copper from 35.0m. Copper mineralisation has now been intersected over a strike length of 350m and remains open along strike and at depth.

Planning is now underway for further evaluation of the historical copper soil anomaly that extends over a strike length of c.16km within the licence area. Tertiary has given notice to joint venture partner Mwashia Resources Ltd. ("Mwashia") that it has now earned a 51% interest in the Jacks Project licence, and has duly exercised its option to continue earning up to a 90% joint venture interest. Jacks Project is one of five licences areas in Zambia where Tertiary has the right to earn a 90% interest from Mwashia.