お知らせ • Jun 03
Mantaro Silver Corp Provides an Update on Its High-Grade Silver Santas Gloria Silver Property, Located 55 Km East of Lima, Peru
MANTARO SILVER CORP provided an update on its high-grade silver Santas Gloria Silver Property, located 55 km east of Lima, Peru. The Santas Gloria Silver Property, which is 100% owned, is comprised of three mineral concessions totaling 1,100 hectares. There are over 12 kilometers of intermediate sulphidation veins and vein splays arranged into a number of key target zones: the Tembladera Vein System, San Jorge Vein System, Kelly Vein, Maribel Vein, Paquita Vein and Rosario Vein. The system has never been drilled tested and exploitation of silver was limited to two areas of the San Jorge and Tembladera veins. The Tembladera Vein system is located in the central southern part of the concessions. The system comprises the east-west tending Tembladera Vein and the northeast-southwest striking Tembladera 1 and 2 veins. Collectively the Tembladera Veins have a cumulative strike length of at least 4 km. Veins dip steeply (78° to 88°) to the south and average between 0.7 to 2.0 m in width. Outcropping veins are strongly oxidized, crudely banded and strongly brecciated, and often weather recessively due to high base metal sulphide content. Veins are pervasively oxidized to at least 50 m vertical depth and display strong hydrothermal brecciation and minor cataclastic brecciation in underground drives. Secondary manganese oxides are common in weathered portions of the veins. Sulphide mineralization is common in the lower workings where it forms clots and crude bands. Quartz is the dominant gangue mineral, rhodocrosite and pyrite are common accessories. Economic minerals include argentite, sphalerite and galena, and native silver. The Company collected 133 surface channel samples across the Tembladera veins. Assays returned grades ranging from <5 g/t Ag to 798 g/t Ag, many assays were above 150 g/t Ag. These assays results are considered highly significant given the extensively weathered nature of outcropping veins, which also explains the low base metal sulphide tenor. Twenty-one underground channel samples were taken within accessible drives. The average silver grade for all samples was 1149 g/t Ag over an average sample width of 0.45 m, silver grades ranged from <5 g/t to > 10,000 g/t Ag. The average base metals for samples was 2.23 % Pb (<0.5 % Pb to > 20 % Pb) and 1.18 g/t Zn (<0.1% to 9.1%). Small scale historical production was conducted over a vertical interval of approximately 160 m. Five drifts were developed along the vein from portals in the valley side, mineralized material was extracted by stoping upwards. The Company plans to carry out 2,500 metres of diamond drilling at the Tembladera Vein System. The San Jorge vein is located in the southern part of the Santas Gloria Silver Property and is hosted in Rimac and Huarochiri Group volcano-clastic rocks. The San Jorge system has a strike length of approximately 3 km, strikes broadly east-west, and dips steeply (78° to 85°) to the north. On the surface, the San Jorge vein can be traced via colonial workings and outcrop for over 3 km. Veins form resistant outcrops that are between 1 to 2 m wide. Oxidation is pervasive at surface and extends to depths of between 50 to 100 metres in historical underground workings, where the vein is between 1 to 2 m wide and weakly brecciated. Black manganese oxides are common in the weathered portions of the vein. Sulphide mineralization is common in the lower workings where it forms clots and crude bands. Quartz is the dominant gangue mineral, rhodocrosite and pyrite are common accessories. Economic minerals include argentite, sphalerite and galena, and native silver. The Company collected 36 surface channel samples across the San Jorge vein. Assay results returned average grades of 280 g/t Ag, ranging from < 5 g/t to 2500 g/t Ag. The average vein width was 0.9 m, but the vein swells to 5 m wide in some sections that have not yet been sampled. Ninety underground channel samples were taken from level two and three of the historical San Jorge workings. The average grade across all samples was 520 g/t Ag, 0.96 % Pb and 0.67 % Zn. Samples had an average width of 0.43 m and ranged in grade from < 5 g/t to 4100 g/t Ag, <0.1 % to 9.7 % Pb and <0.1 % to 4.2 % Zn. Small scale historical production was conducted over a vertical interval of approximately 110 m. Three drifts were developed along the vein from portals in the valley side, mined material was extracted by stoping upwards. The Company plans to carry out a 2,000 metre diamond drill program at the San Jorge Vein System.