Tocvan Ventures

El Picacho Project

Overview Map

Priority Projects

El Picacho


Sonoran Desert




Advanced Stage – Targets Identified


Tocvan is earning 100% ownership


2,413.7  Ha

Target Style

Shear-zone hosted / Intrusion-related Au Systems


Tocvan Ventures

2023 Planned Program

Expansion drilling to follow up recent drill program

Tocvan Ventures


The El Picacho Gold-Silver property is interpreted as an orogenic gold system within the regional Caborca Orogenic Gold Belt known for producing gold mines that include La Herradura (>10 Moz Au) and San Francisco (>3 Moz Au). The project is 140 kilometers north of Hermosillo and totals 24 square kilometers. Five primary zones of mineralization have been identified across the property totalling over six kilometers of prospective trends. Surface sampling and historic workings have identified high-grade gold and silver values. The project has only seen widely spaced reconnaissance drilling with no follow-up. Tocvan believes this provides an excellent opportunity for discovery of a muti-million ounce district.

Mining operations across several target areas took place during the 1950’s to 1970’s, profiting from high-grade gold veins. Evidence that mining occurred includes considerable development of mine workings at target areas such as San Ramon, La Cornea, La Tortuga and Murcielago. The quantity of gold exploited is unknown, but is thought to be at least a few thousand ounces due to the large number of underground workings, pits and placer areas throughout the property.

Different areas of the property were explored by different companies at various times in the past. The abundant information gathered has defined clear targets for drilling. In the nineties Geomaque mapped, sampled, trenched, and drilled (>1000 meters RC). In 2000, Phelps Dodge (Freeport) optioned the property and performed regional scale mapping over more than 6,000 Hectares in the area. They collected rock samples for geochemistry and drilled five RC holes. Timmins in 2011-2013 mapped, collected geochemical samples and drilled RC holes. Timmins drill holes were widely spaced over the property. The most recent work was performed by Millrock Resources partnered with Centerra Gold during 2017 and 2018. More detailed mapping (1:2000 scale) was conducted in select areas, soils were sampled over the entire property, and geophysical work included magnetometry and IP geophysics were conducted. Core drilling by Millrock and Centerra was conducted in the northwest property area. None of the target areas generated by the data collected above have been adequately drill tested. (Summarized from internal Millrock Report, 2020)


  • regional scale mapping, 100% coverage
  • semi detailed scale (1:5000) mapping, 30% coverage
  • soil geochemistry, 100% coverage
  • rock geochemistry, 30% coverage
  • ground magnetics, 70% coverage
  • 17.8 km dipole-dipole IP in 16 lines
  • Reconnaissance drilling

San ramon Drill Highlights

  • Tocvan completed our first ever drill program at the El Picacho Gold-Silver project in Sonora, Mexico. Ten drill holes totalling 1,075.1-meters were completed at the San Ramon Prospect testing for low-grade mineralization adjacent to historic underground workings that have returned high-grade gold with silver.

  • Drilling aimed to test different structural orientations to determine the best way to target mineralization. Mineralization associated with historic underground workings was confirmed and the most significant mineralization was discovered in a 100-meter step-out from the historic workings of the San Ramon target, confirming the model that mineralization continues at depth in west-dipping system. Hole SRA-22-010, returned the most significant results to date intersecting 44.2-meters of 0.6 g/t Au, including 12.2-meters of 2.0 g/t Au and 7 g/t Ag from a downhole depth of 41.2-meters (approx. 25-meters from surface). Mineralization has now been intersected over a 300-meter strike and 200-meters down-dip from the surface exposure. 
  • Hole SRA-22-003 returned 27.5-meters of 0.5 g/t Au, including 12.2-meters of 1.1 g/t Au, from 21.4-meters depth.

  • 100m Step-Out Hole SRA-22-010 returned 44.2-meters of 0.6 g/t Au, from 41.2-meters depth
    • including 12.2-meters of 2.0 g/t Au and 7 g/t Ag

    • including 3.1-meters of 7.6 g/t Au and 9 g/t Ag 

  • Hole SRA-22-008 returned 16.8-meters of 0.5 g/t Au, from 21.4-meters including 4.6-meters of 1.8 g/t Au and 6 g/t Ag

  • Hole SRA-22-004 returned 13.7-meters of 5 g/t Ag, from 128.1-meters

  • Confirms Mineralization in Lower Metasediments – 2 g/t Ag over 100.6-meters 

  • Hole SRA-22-005 returned 4.6-meters of 0.5 g/t Au and 5 g/t Ag, from 21.4-meters 

  • Hole SRA-22-007 returned 7.6-meters of 0.3 g/t Au and 17 g/t Ag, from 24.4-meters 

    • Including 3.1-meters of 0.6 g/t Au and 31 g/t Ag 


El Picacho lies in the Basin and Range province characterized by northwest-trending valleys and ranges. Paleozoic rocks, including quartzite and limestone, locally overlie Precambrian rocks. The valleys are covered and in-filled by recent gravels.

Regional geology is widely varied by lithology and by age. Precambrian rocks include metamorphic gneiss, schist and pegmatite and intrusives gabbro and granite. Jurassic rocks include weakly metamorphosed volcano-sedimentary rocks and sedimentary rocks. Cretaceous rocks are intrusive, volcanic and extrusive rocks. Tertiary conglomerate is also found throughout the region. These lithologies are all found at El Picacho and elsewhere in Northeastern Sonora. All the above lithologies are in places covered by alluvium and colluvium.

Multiple orogenic events and intrusions have deformed and metamorphosed the Precambrian to Tertiary rocks above. Tectonic extension has produced large blocks and valleys covered in colluvium and alluvium at El Picacho as well as throughout the Sonoran Desert.

The El Picacho property lies in a portion of Mojave-Sonora (Caborca) gold belt characterized by the presence of Precambrian to Tertiary age rocks represented by different grades of deformation and metamorphism. The rocks principally involved in the process of deformation and associated with the gold mineralization in the region are of Precambrian, Jurassic and Cretaceous age.

The El Picacho project has numerous gold-silver occurrences with trace to small amounts of other metallic minerals (As-Sb-Te). The gold most commonly occurs in granitic gneiss that contains principally free gold and occasionally electrum. The associated mineralogy, the possibility of associated tourmaline, the style of mineralization, and fluid inclusion studies at the nearby San Francisco deposits suggest the Picacho prospect may be of mesothermal origin.

Mineralization is associated with quartz veins and veinlets and quartz stockwork containing sulfide box works, wulfenite, galena, copper oxides, migmatite and occasional visible gold. The highest-grade samples contain sericite, siderite and calcite alteration. Mineralization is structurally controlled at El Picacho. Evidence for this interpretation includes the emplacement of veins in the faults mapped at several target areas and in historic mine workings. As is seen in the field, high angle and low angle structures appear to channel the mineralizing fluids, especially the higher-grade quartz / gold veins. This structural setting is similar to those of the Herradura and San Francisco mines. (Summarized from internal Millrock report, 2020)

  • Diverse Terrain:

    • Deserts, mountains, coastal plains, and valleys make up the varied landscape of Sonora.


  • Rich Mineral Resources:

    • Abundant deposits of various minerals including:
      • Copper: Sonora is the largest copper-producing state in Mexico.
      • Gold and Silver: Significant deposits, with notable mines such as Mulatos and La Herradura.
      • Other Minerals: Molybdenum, graphite, lead, zinc, etc.


  • Copper Production:

    • Sonora’s prominence in copper mining is evident:
      • Cananea Mine: One of the oldest and largest copper mines globally.
      • La Caridad, El Arco, Buenavista del Cobre: Major copper mines in the region.


  • Gold and Silver Mining:

    • Sonora’s importance in gold and silver extraction:
      • Mulatos and La Herradura: Large-scale open-pit gold mines in the state.
      • Smaller-scale Mines: Numerous operations contribute to the gold and silver production.


  • Mining Infrastructure:

    • Well-developed infrastructure supports mining activities:
      • Transportation: Extensive network of roads, railways, and ports.
      • Support Services: Mining service companies and equipment suppliers.
      • Experienced Workforce: Availability of skilled labor for mining operations.


  • Mining Regulations:

    • Mexico’s legal framework ensures responsible mining practices:
      • Environmental Regulations: Compliance with rules to protect the environment.
      • Permitting Processes: Adherence to permits and licensing requirements.
      • Community Engagement: Regulations to involve local communities in mining activities.


  • Investment Opportunities:

    • Sonora presents attractive investment prospects:
      • Foreign and Domestic Investment: Encouraged by the state government.
      • Exploration and Mining Projects: Potential for new ventures and expansion.

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