공고 • 13h
Sunrise Resources plc Provides Update on Reese Ridge Zinc-Lead-Silver Project
Sunrise Resources plc announced further encouraging high-grade zinc, lead and silver assay results from its Reese Ridge Zinc-Lead-Silver (-Gallium) Project in Nevada, USA, where recent geological mapping and sampling have strengthened the Company's confidence in the exploration potential of the Project and are assisting with the definition of drill targets. Geological mapping and sampling programme successfully completed to refine the structural interpretation and support drill hole planning. Very high-grade results returned from the Ridge Top Prospect, including: Narrow vein samples grading up to 9.9% zinc, greater than 20% lead and 192g/t silver. Mineralisation confirmed in both the hanging wall and footwall surrounding the high-grade veins, demonstrating encouraging widths of economically significant mineralisation: Hanging wall: 0.6m chip sample grading 4.8% zinc, 0.4% lead and 10g/t silver. Footwall: 3.3m chip sample grading 5.8% zinc, 1.0% lead and 17g/t silver. Development of a three-dimensional geological model is underway to integrate geological, structural and geophysical data and optimise drill targeting. The Company's wholly owned Reese Ridge Project is situated on the southern margin of the highly prospective Humboldt Structural Zone, approximately 52 miles south-southwest of Battle Mountain, Nevada. The Project covers a fault-bounded limestone horst block that is juxtaposed against younger sedimentary rocks and flanked to the east and west by Tertiary volcano-sedimentary basins. Numerous iron-rich gossans developed from massive and semi-massive sulphides occur throughout the property and first attracted both historical prospectors and the Company. Sampling of these gossans has consistently returned anomalous zinc, lead and silver values, with assays of up to 6.8% zinc, 3.3% lead and 51g/t silver, while forty-three samples collected from gossans and historical workings averaged 0.86% zinc. Subsequent exploration identified a different style of mineralisation hosted within altered limestone containing only sparse visible galena. Initial sampling returned an exceptional assay of 15.9% zinc, despite the subdued visual appearance of the rock. Follow-up work subsequently identified assays of up to 29.6% zinc, together with 68ppm gallium. Unlike the iron-rich gossans, these zinc-rich zones contain oxide and carbonate minerals that are difficult to recognise visually in the field, suggesting that significant mineralisation may previously have been overlooked. Most recently, the Company's Nevada-based geological consultant completed a programme of reconnaissance mapping and sampling over the area first reported by the Company on 26 September 2024 and which is now designated the Ridge Top Prospect. The work has confirmed the presence of narrow but exceptionally high-grade mineralised structures containing relic sulphide minerals and has substantially improved the Company's understanding of the local structural controls on mineralisation. Sampling across mineralised exposures within historic prospecting pits returned the following results: In addition, a separate 3m chip sample collected several metres along strike within the interpreted footwall returned: Sample LR-056: 3.0m grading 5.8% zinc, 1.0% lead and 17g/t silver. Importantly, the full width of this footwall mineralisation has yet to be exposed. Previous work at Reese Ridge also demonstrated elevated gallium values of up to 69ppm. Gallium is classified as a critical mineral owing to its importance in semiconductors, high-frequency electronics and solar technologies. The Company intends to continue assessing the gallium potential of the project in future programmes. As previously announced on 31 October 2023, modelling of historical airborne geophysical data identified a resistive core, a possible granitic intrusion, with a surrounding annular zone of low resistivity (high conductivity) extending from near surface to almost 1,000m depth. Significantly, all high-grade mineralisation identified to date occurs directly above this conductive zone, providing additional support for the Company's interpretation that the low resistivity zone may represent a substantial sulphide-bearing system at depth. The geological setting, alteration style, structural controls and geophysical signature are all consistent with a CRD model. CRD deposits are capable of hosting large, high-grade mineral systems. Examples include the Taylor Deposit within South32's Hermosa Project in Arizona, containing a Mineral Resource of 138 million tonnes at a zinc-equivalent grade of 8.61%, and the recent high-grade CRD discoveries reported by i-80 Gold at the Ruby Hill Project in Nevada. The Company believes that the encouraging results obtained to date warrant the next phase of exploration, which, subject to funding, is expected to include additional ground geophysics followed by drill testing of the priority targets generated by the developing three-dimensional geological model.