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Exceptional Drilling Results Continue at Mostaza
Exceptional Drilling Results Continue at Mostaza.

About this update from Great Southern Copper Plc
[{"type":"text","content":"\n\nTHIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION AS STIPULATED UNDER THE UK VERSION OF THE MARKET ABUSE REGULATION NO 596/2014 WHICH IS PART OF ENGLISH LAW BY VIRTUE OF THE EUROPEAN (WITHDRAWAL) ACT 2018, AS AMENDED. ON PUBLICATION OF THIS ANNOUNCEMENT VIA A REGULATORY INFORMATION SERVICE, THIS INFORMATION IS CONSIDERED TO BE IN THE PUBLIC DOMAIN.\n \n24 June 2025\n \nGreat Southern Copper plc\n(\"GSC\" or the \"Company\")\n \n \nExceptional Cu-Ag Drill Results Continue from Phase II Drilling at Mostaza, Cerro Negro\nIncluding CNG25 DD015: 6.0m at 6.61% Cu and 542.4g/t Ag from 43m\n \nHighest assay grades up to 10.4% Cu and 672g/t Ag\n \n \nGreat Southern Copper plc (LSE: GSCU), the company focused on copper-gold exploration in Chile, is pleased report further exceptional high-grade assay results from Phase II drilling at the Mostaza Mine, Cerro Negro prospect.\n \nHighlights:\n· Assay results received for diamond holes CNG25 DD015 - DD018 and DD021 with highest significant results including;\nØ CNG25 DD015: 9.9m of 5.47% Cu and 442.5g/t Ag from 41.15m, including\no 6.0m of 6.61% Cu and 542.4g/t Ag from 43m, including\no 2.0m of 8.18% Cu and 669.0g/t Ag from 44m\nØ CNG25 DD016: 7.5m of 4.48% Cu and 342.6g/t Ag from 89m, including\no 0.5m of 10.4% Cu and 503.0g/t Ag from 96m\n· Highest assay result received includes 10.4% Cu and 672g/t Ag\n· Five lines of induced polarisation (IP) and audio frequency magneto-telluric (AMT) geophysics surveys completed testing the Mostaza trend over 2.5km\n· Phase III exploration drilling at Mostaza is in advanced planning stages and will be guided by recent pole-dipole IP and AMT geophysics surveys, along with surface mapping and geochemistry data\n· GSC holds option to own 100% of the Cerro Negro prospect, including the Mostaza mine\n· Prospect located at low elevation with excellent access to infrastructure and mining services\n \nSam Garrett, CEO for Great Southern Copper in Chile, said: \"These spectacular jewellery box copper and silver grades are our best results to date and continue to highlight the exciting potential of the Mostaza deposit at Cerro Negro. Besides the very high grades, the d...