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Adelita

  • Project Adelita
    Commodity Copper-Silver
    Location Southern Sonora
    Nearest City 50 road kilometers from Álamos, Sonora
    50 road kilometers from El Fuerte, Sinaloa
    Nearest Major Mining Projects 5 km east of Pan American's Alamo Dorado silver mine
    60 km southeast of Cobre Del Mayo's Piedras Verdes copper mine
    Development Stage 4,900 m drill program completed
    Geology Skarn-Porphyry
    Land Package 6,446 has
    Exploration Highlights Hole 1 - 16.15 m of 1.97% Cu, 73g/t Ag, 0.84 g/t Au

    Hole 12 - 105.20 of 1.03% Cu, 36.4 g/t Ag, 0.45 g/t Au

    Hole 12 - 201.4 m of 0.52% Cu, 13 g/t Ag, 0.15 g/t Au
    Access & Infrastructure Include good road access, mining labour force, power and water
    Project Interest 100% Owned

    Project

    The Adelita project is a copper-gold-silver skarn mineralization and porphyry project.  A 40 meter-long adit had been driven on the Cerro Grande prospect in the central part of the project area during the 1960s.  Unknown operators opened the Las Trancas prospect, a shear zone hosting copper oxide in the southwestern part of the project area prior to 2005, and conducted minor production from these areas.

    Jurassic to Cretaceous metavolcanics and metasediments constitute the oldest rocks at Adelita.  These metamorphics form apparently deeply rooted roof pendants in a late Cretaceous regionally extensive granodiorite batholith.  Younger dioritic to monzonitic stocks and dikes cut both the batholithic and metamorphic rocks.  Skarn- and porphyry-related Cu-Ag-Au mineralization are believed to be related to the younger intrusive rocks at Adelita.  The dominant structural trend is NNW-SSE, with subsidiary NE-SW faulting.  Mid-Tertiary felsic pyroclastic rocks underlie ridges on the western side of the project area and Upper Tertiary gravels and basalts overlie batholithic rocks on the eastern margin of the area.

    An exploration program including drilling, airborne geophysics and drilling have shown significant magnetic anomalies parallel to the dominant mineralized trend at Cerro Grande, suggesting blind targets for future drilling and demonstrated 300 meters of vertical continuity on the Cerro Grande skarn target discovery with the porphyry target still undrilled. Seven target areas have been identified.

    The project is located on the southern tip of Sonora State, and lies in a regional belt of porphyry mines and prospects including Cobre del Mayo’s Piedras Verdes porphyry Cu mine and adjacent to Pan American Silver's Alamo Dorado mine. 

     

  • The Adelita project presents a skarn/porphyry model.  Mesozoic metamorphosed carbonate rocks are favorable host rocks for skarn mineralization where they are intruded by post-Laramide stocks and dikes.  Semi-massive to massive magnetite occurs with copper mineralization at Cerro Grande.  Airborne and ground geophysical studies have shown significant magnetic anomalies parallel to the dominant mineralized trend at Cerro Grande, suggesting blind targets for future drilling.

    Prior to Minaurum’s taking over the project, Coplau identified a 400 meter-long copper-mineralized garnet-skarn prospect on Cerro Grande in the central part of the Adelita project.  Exploration at Adelita has consisted of geological mapping, geochemical sampling, airborne and ground geophysics, and drilling.  Minaurum conducted an 8-hole, 1,819-m core-drilling program at the Cerro Grande Cu skarn prospect in 2010.  Ocean Park drilled 7 more core holes totaling 1,186 m at Cerro Grande, plus 6 holes totaling 1,925 m at the Mezquital porphyry Cu prospect. 

    Significant Cerro Grande drill results by Ocean Park include:

    CGDD-10-001 -  16.2 metres of 0.84 g/t Au, 73 g/t Ag, and 1.97% Cu

    CGDD-10-002 -  47.6 metres of 0.46 g/t Au, 46 g/t Ag, and 0.98% Cu

    CGDD-12-009 - 105.2 metres of 0.43 g/t Au, 36 g/t Ag, and 1.03% Cu

    CGDD-12-012 - 201.4 metres of 0.15 g/t Au, 13 g/t Ag, and 0.52% Cu

    Drilling shows more than 300 metres of vertical continuity of mineralization at Cerro Grande.

    In addition, exploration resulted in the identification of a large copper-in-soil anomaly west of the village of Mezquital, in the western part of the project area, and the confirmation of skarn-hosted Cu-Au-Ag mineralization at Cerro Grande.  In addition, the airborne VTEM-magnetometry survey confirmed the existence of through going NNW- and NE-trending structures. 

    Minera Kennecott investigated the Las Trancas area in 2005, including geological mapping, soil- and rock geochemical sampling, and a 5-hole, 1,264-metre reverse-circulation drilling program.  Kennecott’s drill program cut 16.3 meters grading 0.25% Cu and 0.56% Zn, including a 2.0-m interval assaying 0.47 g/t Au, 26 g/t Ag, and 0.89% Cu.

    A total of 4,900 m - 21-hole drill program was complete on both the Cerro Grande and Mezquital targets.

     

  •   Drill results from the 3,000 m drill program at the Cerro Grande target are listed in the table below.

    Hole From
    (m)
    To
    (m)
    Interval
    (m)
    Ag
    g/t
    Au
    g/t
    Cu
    %
    CGDD-10-001 35.65 51.80 16.15 78 0.0835 1.97
    includes 35.65 40.98 5.33 94.4 1.123 2.38
    CGDD-10-002 35.57 83.21 47.64 46 0.462 1.05
    includes 35.57 47.40 11.83 18.4 0.302 1.37
    and 63.40 69.71 6.31 221 2.25 3.6
    CGDD-10-004 184.79 195.99 11.20 39.9 0.587 1.11
    includes 184.79 186.84 2.05 32.8 1.04 1.30
    and 189.89 182.77 2.88 97 1.285 2.44
    CGDD-10-004 288.22 293.54 5.32 7.9 0.098 0.29
    CGDD-12-009 5.60 110.80 105.20 36.4 0.446 1.03
    includes 35.10 110.80 75.70 50.1 0.62 1.42
    includes 35.10 77.00 41.90 77.9 0.977 2.21
    CGDD-12-010 97.60 131.25 33.65 46.6 0.346 0.91
    includes 98.60 119.95 21.35 72.4 0.535 1.41
    CGDD-12-011 159.20 264.50 105.20 7.4 0.073 0.25
    includes 159.90 163.30 4.10 22.2 0.067 0.83
    and 175.60 194.10 18.50 20.8 0.152 0.52
    and 240.95 261.40 20.45 6.7 0.157 0.42
    CGDD-12-012 37.70 223.65 185.95 13.5 0.157 0.56
    including 37.70 48.00 10.30 1.1 0.171 0.49
    and 154.40 223.65 69.25 32.9 0.358 1.29
    and 189.65 190.35 0.70 398 3.09 8.13
    CGDD-12-013 32.95 40.15 7.20 26.4 0.417 0.79
      49.25 50.95 1.70 10.7 0.229 0.94
      53.90 55.65 1.75 71.2 0.836 1.3
    CGDD-12-014 25.80 29.15 3.35 3.5 0.021 0.18
      36.10 43.00 6.90 2.9 0.028 0.18
    CGDD-12-015 5.35 10.20 4.85 13.8 0.157

    0.32

      28.25 32.40 4.15 4.4 0.1 0.18
      42.70 60.75 18.05 44.4 0.572 0.99

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