お知らせ • Nov 24
Atalaya Mining plc Announces Update on Exploration Activities
Atalaya Mining Plc provided an update on the ongoing exploration programme at its projects in southern Spain which include Proyecto Masa Valverde ("PMV"), Proyecto Ossa Morena ("POM") and Proyecto Riotinto East ("PRE"). A total of four rigs are currently active, with three at PMV and one at POM. Ongoing Exploration Programmes; In the past years, Atalaya has assembled a substantial portfolio of exploration projects in southern Spain. These include PMV and PRE, which are located in the Riotinto District, as well as POM, which is located north of Riotinto. Exploration activities at these projects are consistent with Atalaya's strategy to develop its existing 15 Mtpa mill into a central processing hub for material sourced from its deposits in the region. Overview; PMV is strategically located approximately 28km from Proyecto Riotinto, and consists of several volcanogenic massive sulphide ("VMS") type deposits including Masa Valverde ("MV"), Majadales, the Campanario Trend and now the Mojarra Trend. In April 2022, Atalaya announced a new independent resource estimate for MV and Majadales. Three core rigs are currently active and focused on step-out drilling at MV, resource definition drilling at the Campanario Trend and drill testing the lateral continuity of the new discovery made at the Mojarra Trend. Since the Company's last exploration update, 34 holes have been completed at Campanario, five at MV West Extension and two at Mojarra Trend for a total of about 20,871m. Mojarra Trend; The Mojarra Trend is a 2km long, north-west trending structural corridor, located 1km north of the Campanario Trend. It is defined by the presence of small, historical manganese and pyrite mines, elevated Cu values in soils and associated fix-loop electromagnetic ("FLEM") anomalies, all along a complex structural (low angle faulting) and stratigraphic (including basic volcanics) setting. Two holes totaling 1,162m have been completed to date and one more hole is under way. The first hole (MR01) failed to hit any significant mineralisation but the second hole (MR02), located in the westernmost part of the FLEM anomaly, intersected 18.75m of massive sulphides at 434m depth. Pyrite is the predominant sulphide mineral, but is also associated with visible sphalerite, galena and chalcopyrite. Host rocks are graphitic black shales with felsic tuffs and minor volcanics interbedded. Assay results returned 18.75m at 0.84% Cu, 0.63% Zn, 0.66% Pb and 76.24 g/t Ag including a higher-grade interval of 6.80m at 1.22% Cu and 101.60 g/t Ag. The next round of drilling will test the lateral continuity of this new zone which, if confirmed, could represent a significant discovery not only at PMV but also in the Iberian Pyrite Belt. MV West Extension; Five holes totaling 5,034m were completed in the western part of the MV deposit with the aim of extending the known mineralisation in that direction (see Figure 5). The holes were distributed as follows: Holes MJ54 and MJ55 were drilled in the westernmost section of the deposit which currently represents the west limit of the resource envelope; Hole MJ53 was targeting the FLEM anomaly located 300m west of MV; Holes OD01 and OD02 drill tested another FLEM anomaly located 1km west of MV; MJ54 and MJ55 hit wide intervals of massive sulphide mineralisation demonstrating that the system remains open to the west. Hole MJ54 intersected 90.10mfrom823.00m depth while drill hole MJ55 hit 19.40m from 908.20m depth. In both cases, visible sphalerite, galena, and chalcopyrite is associated with the massive pyrite mineralisation. Assay results for hole MJ54 returned two high grade mineralised intervals of 18.00m at 0.25% Cu, 8.30% Zn, 2.49% Pb, 60.17 g/t Ag and 0.89 g/t Au plus 3.00m at 0.36% Cu, 6.11% Zn, 0.22% Pb, 29.33 g/t Ag and 0.98 g/t Au. A separate lower rade interval returned 12.00m at 0.09% Cu, 2.54% Zn, 1.58% Pb, 51.08 g/t Ag and 0.75 g/t Au. Stockwork type mineralisation intersected above and below the massive sulphides returned low-grade results. Assay results for hole MJ55 returned 28.50m at 0.42% Cu, 0.27% Zn, 0.20% Pb and 19.50 g/t Ag. Gold values are not yet available for this hole. Drill hole MJ53 was the second attempt to hit the core of the FLEM anomaly located 300m west of the western limit of MV deposit. However, and as occurred with previous hole MJ47, it failed due to severe drifting problems. Despite those issues, the first hole (MJ47) had intersected massive sulphides which returned 14m at 0.36% Cu, 0.61% Zn, 0.32% Pb, 18.04 g/t Ag and 0.54 g/t Au (0.78% CuEq). Drill holes OD01 and OD02 failed to find any significant mineralisation. However, a down hole EM survey on those holes showed a moderate off-hole conductor immediately north of OD1 which will deserve further drill testing. Mineralisation found in holes MJ54 and MJ55 has several positive exploration implications for the following main reasons: Improves the geological model in the west sector of the deposit providing more lateral continuity to the massive sulphide zones; Suggests that several historical holes were stopped prematurely; Confirms that mineralisation remains open laterally, especially to the west but, more importantly, with associated high-grade results which could be economic even at those depths; Will help to target more accurately the two main FLEM anomalies west of the deposit. An additional step-out hole, MJ56, is currently in progress with the goal of proving the continuity of the high-grade zone encountered in hole MJ54 approximately 150m to the NW. Campanario Trend; Resource definition drilling continues in progress at the Campanario Trend with one rig. Since the beginning of the programme, the Company completed a total of 14,676m in 56 holes. Assay results for the first 22 holes were announced in July 2022 which corresponded to drilling around the historical Campanario mine, located in the central part of the Campanario Trend.