The Shalipayco deposit is interpreted to be a Mississippi Valley-type (MVT) deposit. The following is taken from Leach et al. (1995).
The mineralization at Shalipayco consists of stratabound mantos and lenses subparallel to the stratigraphy. Vein mineralization (Veta Eddy) has also been identified at the Project site, however, it is not considered part of the resources because of insufficient drill hole information and lack of structural interpretation.
The main mantos are the Resurgidora, Intermedio, San Luis, Pucará, and Virgencita mantos. The mantos do not generally display extensive lateral continuity. Length varies between 50 m and 400 m and thickness averages 1.50 m. However, the Intermedio and Resurgidora Mantos can reach up to 3.0 km and 4.0 km in length, respectively, and a thickness of up to 18 m.
Mineralization in the Project consists of sphalerite, galena, and pyrite, with a gangue of marcasite, bravoíte, barite, dolomite, calcite, quartz, and dolo-sparite. Mineralization occurs with varying textures like rhythmites, replacements, collapse breccias, crackle breccias, mosaic breccias, veinlets, and evaporitic textures among others. The zinc and lead content may vary up to 51% Zn (Intermedio Manto) and 17% Pb (Intermedio Manto). The average grades for mineralization are 4.9% Zn and 0.5% Pb, respectively. The Zn/Pb ratio varies from 73.2 in the Resurgidora to 304.6 in the Intermedio Manto.
INTERMEDIO AND RESURGIDORA MANTOS< ........
