お知らせ • Feb 09
Nexa Resources S.A. Provides the Drilling and Assay Results from the Fourth Quarter of 2021 and Full Year 2021
Nexa Resources S.A. provided the drilling and assay results from the fourth quarter of 2021 and full year 2021. The company's Mineral Exploration program for 2021 comprised a total of 111,000 meters of exploratory drilling, of which 29,609 meters were executed in the fourth quarter of 2021 through 21 operating drill rigs, totaling 110,306 meters of exploratory drilling in 2021. In Peru, 18,335 meters were drilled in 4Q21 with eleven rigs, totaling 76,579 meters in 2021. At the Pasco Complex, the exploration continued to focus on the Sara Sur and Integración targets at El Porvenir with thick and high-grade new intersections. In Brazil, 6,524 meters of exploratory drilling were executed with seven rigs in 4Q21, totaling 21,419 meters in 2021. At Aripuanã, exploratory drilling has been focused on northwest extension of Babaçu where new drilling continues to confirm high-grade mineralization. In Namibia, 4,750 meters were drilled in fourth quarter 2021 with three rigs, totaling 12,309 meters in 2021. In fourth quarter 2021, a total of 8,455 meters of exploration drilling and 12,997 meters of infill drilling were executed totaling 33,199 meters and 56,804 meters, respectively, in 2021. Exploration drilling included 396 meters in orebody 5B; 5,211 meters at Pucasalla, 859 meters at Orcocobre Deep, and 1,990 meters in orebody 12 targets located northwest of the mine. The northeast continuity of the Pucasalla mineralized zone was confirmed with hole PECLD05806 with 8.7m@3.14% Pb and 148.16g/t Ag; and 15.9m@1.52% Zn, 1.42% Pb, and 41.25g/t Ag. The northwest continuity of the body was confirmed with hole PECLD05880 with 61.0m@ 1.27% Cu, 29.81g/t Ag, and 0.68g/t Au. For first quarter 2022, we plan to continue drilling the Pucasalla target from the surface with two rigs towards the northwest and southeast extensions (3,400 meters in total). Inside the mine, the objective is to drill the northwest extension of orebody 5B and the Festejo geophysical anomaly, located 0.78 km southeast of Cerro Lindo (2,150 meters with one rig). In fourth quarter 2021, a total of 4,106 meters of exploration drilling and 7,539 meters of infill drilling were executed totaling 18,625 meters and 35,627 meters, respectively, in 2021. A total of 1,898 meters were drilled at Sara Sur with one rig and 1,586 meters at Integración orebody with one rig. An additional 622 meters were drilled at the Porvenir Sur target. The continuity of Sara Sur towards the south is confirmed, trending southwest mainly. Main intercepts are shown in hole PEEPD02096 in two intercepts: 4.7m@ 1.37% Zn, 0.80% Pb, and 214.93g/t Ag; and 4.8m@2.19% Zn, 4.51% Pb, 128.40g/t Ag, and 0.67g/t Au. In the Integration orebody, positive results were obtained in holes PEEPD02066 with 27.4m@1.65% Zn, 0.75% Pb, 150.27g/t Ag, and 0.12g/t Au, and EEPD02099 with two intercepts: 7.8m@1.35% Zn, 1.41% Pb, 440.71g/t Ag, 1.5g/t Au and 7.7m@1.08% Zn, 1.11% Pb, 746.32g/t Ag, and 0.49g/t Au, which confirms the continuity of mineralization below the 3,300 level. In December 2021, the Porvenir Sur target was drilled, where hole PEEPD02131 revealed 4.1m@4.84% Zn, 4.91% Pb, 156.32g/t Ag and .11g/t Au. In fourth quarter 2021, 1,744 meters of exploration drilling and 753 meters of infill drilling were executed at the San Gerardo open pit extensions with two drill rigs, totaling 3,145 meters and 10,191 meters, respectively, in 2021. At Atacocha, the continuity of mineralization to the northwest at the San Gerardo open pit is confirmed from the surface by hole PEATD01483 with two intercepts: 3.9m@2.18% Zn, 8.40% Pb and 125.72 g/t Ag; and 18.10m@2.26% Zn, 0.45% Pb, 0.24% Cu, 21.86g/t Ag and 0.61g/t Au. At Ayarragram to the southeast of San Gerardo, hole PEATD01488 shows two intercepts: 13.9m@4.97%Zn, 0.39%Pb, 15.09 g/t Ag and 0.38 g/t Au, and 28.20m@3.73% Zn, 1.69% Pb, 31.22 g/t Ag and 0.75g/t Au. The continuity of the orebody 17 towards the southeast of San Gerardo was confirmed with hole PEATD01482, revealing 8.4m@1.13% Zn, 0.91% Pb, 13.31 gr/t Ag and 0.60 g/t Au. The 2021 drilling campaign also allowed to reinterpret the Chercher vein system as was previously reported by Nexa. The main intercepts from this period are: PEHILD000029 with 47.6m@4.25% Zn, 0.25% Pb and 30.25g/t Ag; PEHILD000031 with Zn, 0.89% Pb and 48.45g/t Ag; PEHILD000032 with Zn, 0.67%Pb and 28.34g/t Ag; PEHILD000035 with Zn, 0.57%Pb and 37.37g/t Ag; PEHILD000036 with Zn, 0.19% Pb and 17.94g/t Ag; PEHILD000037 with Zn, 0.20% Pb and 25.04g/t Ag; PEHILD000039 with Zn, 0.12% Pb and 25.41g/t Ag; PEHILD000044 with Zn, 2.41% Pb and 52.25g/t Ag; PEHILD000045 with Zn, 0.38% Pb and 26.99g/t Ag. The brownfield exploration at Vazante is targeting the expansion of existing ineralized zones and the exploration of new areas to define new mineralized zones near the mine. In 4Q21, 15,816 meters of infill drilling and 2,437 meters of exploratory drilling in the Extremo Norte, Central, and Lumiadeira areas were completed, totaling 65,979 meters and 7,548 meters, respectively, in 2021. In the Lumiadeira area, hole MVZMV326P9275D21 confirmed deep high-grade Zinc mineralization over 3.0 and 1.5 meters with pending assay results. The first drilling section on Elefantenberg confirmed mineralization along with the Deblin fault system in hole NANAND000025 with 7.0m@0.70% Cu. Two other holes in the same section revealed the presence of Cu oxides with pending assay results. The eploration strategy for 2022 is to focus on Mineral Resource expansion through brownfield and infill drilling near operating mines and extension drilling on advanced projects. A total of 123,300 meters of drilling is planned for 2022, including 63,500 meters in Peru (52%), 49,800 meters in Brazil (40%) and the remaining 10,000 meters in Namibia (8%). At Cerro Lindo, the company plan to drill a total of 39,000 meters including detailing drilling at the Pucasalla target and extension drilling on other targets such as Festejo, located southeast of Cerro Lindo mine and orebody 9. The company also plan to run a 36 kilometer ground geophysics survey along these targets to confirm continuity of mineralization. At El Porvenir, the company plan to drill 19,000 meters on the following targets: Integración, Porvenir Sur, Longreras trend (700 meters west of Sara) and Carmen Norte and Don Lucho targets between Integración and Porvenir Sur. An additional 25,000 meters of infill drilling is planned for the Ambrex and Link orebodies for Mineral Resources expansion and reclassification. At Bonsucesso, the company plan to drill 8,800 meters of extension and infill drilling for Mineral Resource expansion. At Vazante, the company plan to drill 7,000 meters of brownfield drilling at known orebody extensions. In Namibia, the company plan to drill 10,000 meters to continue to investigate copper mineralization along with the Deblin trend.