お知らせ • Sep 08
GR Silver Mining Ltd. Confirms Down Dip and Lateral Continuity of Se Area High-Grade Ag Discovery
GR Silver Mining Ltd. announced that follow up down dip and lateral drilling has successfully intersected extensions to the new high-grade Southeast ("SE") Area silver (Ag) discovery as a potential expansion of the San Marcial Resource Area, at the wholly-owned Plomosas Project in Sinaloa, Mexico. Surface drill holes SMS22-11 and SMS22-12 both intersected mineralization similar to the previously announced discovery in the SE Area, with multiple intervals grading over 1,000 g/t Ag, hosted in a wide zone with a predominant presence of Ag-rich hydrothermal breccia and stockwork systems. Drill hole SMS22-12 was drilled beneath the discovery hole – SMS22-10, which intersected 101.6 m at 308 g/t Ag – confirming a 90 m depth extension of the Ag-rich zone, while SMS22-11 was drilled along the expected strike, 85 m to the SE of the discovery hole, confirming the lateral continuity in that direction. Southeast Area Discovery: The new discovery in the SE Area represents a 250 m step out to the SE of the San Marcial Resource Area, where the Company has been exploring the extension of the target contact between upper and lower volcanic units (Figure 1), which typically hosts the San Marcial Breccia Ag mineralization, together with strong ground magnetic anomalies delineated in 2021. The drilling to date in the new area has identified a more extensive breccia and stockwork mineralization, rich in Ag, immediately below the contact zone and extending mineralization laterally and down-dip, far below the original target zone. This new, wide, high-grade Ag discovery coincides with an inflexion in the NW-SE trending contact where it intersects with two key NE-SW trending faults (Figure 1). Following the recent discovery of wide, high-grade Ag mineralization in the SE Area of San Marcial, the Company designed additional drill holes to test the continuity of mineralization at depth and laterally. SMS22-12 was designed to test continuity down dip, approximately 90 m below the SMS22-10 intercept (Figure 3). The breccia and intense hematite-quartz veining encountered in SMS22-12 is very similar to the mineralization style encountered in SMS22-10 and has a downhole thickness of 44.5 m at 98 g/t Ag, including a high-grade zone of 0.2 m at 1,059 g/t Ag, indicating continuity of the mineralization at depth. Laterally, SMS22-11 tested the extension of the mineralized zone 60 m to the SE encountering geology and textures similar to those identified in SMS22-10. SMS22-11 encountered technical drilling issues and was suspended prematurely in mineralization, approximately 50 m before reaching the expected lower boundary, and potentially high-grade portion, of the mineralization. Despite not reaching full depth, SMS22-11 intersected a wide Ag-rich zone of 75.7 m at 92 g/t Ag, including high-grade zones 0.3 m at 1,253 g/t Ag and 0.4 m at 1,032 g/t Ag. Correlation of mineralization between SMS22-10 and SMS22-11 suggests that these results likely represent the upper portion of the mineralization, which is controlled by E-W to NW-trending structures, creating extensional breccias and stockworks within the NE fault trend in the SE Area. Taking into account the Company's initial objective to investigate the continuation of the target contact zone along strike to the SE, SMS22-13 was designed to test mineralization on the E side of the NE fault trend to define boundaries of the mineralized body. Texturally, the typical hematite-quartz assemblage was diminished in SMS22-13, with increased abundance of late quartz stockworks containing the sulphides galena and sphalerite rather than Ag sulphides and sulfosalts, which are common within the NE fault trend in SMS22-10, SMS22-11 and SMS22-12. SMS22-13 intersected 18.8 m @ 22 g/t Ag in several mineralized structures close to surface that could potentially represent shallow evidence of a high-grade Ag zone at depth. In the context of the four deep drill holes completed to date in the SE Area discovery zone, the most prospective and high-grade zones appear to be at the 650 m level (above sea level) and remain open down dip for future drilling (Figure 2). They are structurally controlled between the two subparallel NE faults, defining a prospective corridor to further explore, both at depth and along the NE trend, where at least 1 km of faults have been mapped. The new drill results provide an extra volume dimension to the new discovery in the SE Area, supporting further drilling in the area. In addition to the four deep holes drilled to date in the SE Area, after completing detailed geological mapping on 4 km2 along outcropping zones near SMS22-10, the Company drilled a series of shallow holes where exposed breccias and stockworks present similar textures and geology to the discovery zone (Figure 1). Results from the shallow drill holes SMSP22-020, SMSP22-021 and SMSP22-022 are encouraging further follow up drilling as it is common in the area to have small occurrences of mineralization on surface expanding to broader zones down dip. Some of the best results, for example SMSP22-022 of 3.2 m at 436 g/t Ag (from 3.0 m below surface), including 0.5 m at 1,932 g/t Ag (Table 1), demonstrate that the area has potential to generate new targets and additional drilling is in progress. GR Silver is currently drilling a deeper hole down dip from these shallow high-grade results (SMS22-16) and approximately 80 m laterally to the SE from the SMS22-10 discovery intercept. This new hole will explore the concept of small surface exposures potentially turning into much broader zones at depth.