Cerrito XXI

Cerrito XXI is a 1,000-hectare (40 cuadrículas) gold and silver exploration concession held by Mycelium Minerals Bolivia MMB S.R.L. in the municipality of Concepción, Bolivia's Precambrian Shield and Andean mineral belts (unique code: 2058709). The property sits on the Brazilian Precambrian Shield within the Chiquitanía geological domain — a prolific terrain that hosts orogenic gold systems across the region. The concession is accessed via a 5-hour, 282 km paved highway drive from Santa Cruz through Pailón, San Julián, San Ramón, and San Javier. Elevation ranges from 460 to 800 m above sea level; the dry field season runs June through August (annual mean temperature 23–24°C). An LPE (Licencia de Prospección y Exploración) application is currently pending.

The bedrock geology includes Precambrian metamorphic rocks of the Complejo Metamórfico de Concepción (banded gneisses and migmatites with K-feldspar megacrysts up to 4 cm), intruded by the Granitoides de Refugio (foliated granites with blastomylonitic textures), and locally overlain by the Grupo Tajibos metasedimentary sequence (Formación Psamita de Zapocoz quartzites and Formación Esquisto de Laguna graphitic phyllites). A Tertiary laterite cap up to 40 m thick overlies portions of the concession. Gold mineralization is interpreted as orogenic style, controlled by regional shear zones, quartz veins, and hydrothermal breccias. The primary target metals are gold and silver; geochemical tracer elements anticipated include arsenic, antimony, tungsten, bismuth, and silver — consistent with orogenic gold systems globally. Amethyst has been identified at two quartz vein localities within the concession.

The approved 5-year exploration program totals approximately $365,649 USD across three phases: pre-field ASTER satellite imagery analysis for hydrothermal alteration mapping, a systematic 16–18 month field campaign including geological mapping, soil sampling at 27 grid points, trenching, and a 1,500-metre Ingetrol diamond drill program, followed by approximately 2,700 laboratory analyses at a certified laboratory.