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| Projects Overview Cuale Bramador La Mina Desmoronado Aranjuez Technical Papers | Aranjuez Several historic workings occur near the hamlet of Aranjuez. The most significant of these is the internally held América deposit, which has a published ore reserve calculation of 121 857 tonnes of massive sulfide grading 0.66 g/t Au, 337 g/t Ag, 1.14%Pb, 11.21% Zn 0.2% Cu (Maldonado-Reyes and Evangelista-Ramirez, 1996). In 1984, the MMAJ sampled several mine workings, including El Hueso, La Concha, La Atayarita, La Atalaya and La Descubriadora. Most assay results returned values between 0.2-2 g/t Au, 87-300 g/t Ag and 3-5% Pb+Zn. The best result was from La Concha, which returned values of 86.7 g/t Au, 7482 g/t Ag and 3.5% Pb across 0.3 m. The mapping work was followed up by a regional CSMAT resistivity survey in 1984. Inspection of MMAJ's maps indicates that the CSMAT survey was useful for delineating horizons of black argillite. In 1986, the MMAJ drilled 5 vertical holes into selected resistivity anomalies totaling 1369.70 meters in the Aranjuez area (Fig. 2). The best result was 74.33 g/t Ag and 0.23% Zn across 3 meters in Hole MJM5 on the internally held Rodrigo Property. Inspection of the drill logs shows that mineralization occurs mainly in black shales intercalated between both felsic and mafic volcanics. Fig. 1 Ruins of the mineral processing plant near Aranjuez (Almatea Property). A grab sample of massive sulfide from the flat area above the oven returned values of 1.5% Cu, 11.9% Pb, 22.4% Zn, 0.2% Sb, 250 ppm Hg, 60.2 g/t Au and 30, 072.0 g/t Ag (sample 19062). A sample of the tailings below the oven contains 1.2% Pb, 4.2% Zn, 291 g/t Ag, 1401 ppm As, 187 ppm Cd, 82 ppm Sb, 13.5 ppm Bi, 7.6 ppm Hg, 44 ppm Tl and 18 ppm Se (sample 16304). Table 1. Results from drill hole intersections reported by the MMAJ from Aranjuez. Collar locations in Fig. 2. MJM4 is on ZIM's Almatea Property, whereas MJM 5 is on the internally held Rodrigo concession.
Fig. 2. Geological interpretation map of the Aranjuez VMS District showing geological control points, structural measurements and rock sample locations. Targets for detailed mapping and drill testing for VMS style mineralization are the Descubriadora and Dome areas. Mafic volcanics are abundant in the Cuale Sequence at Aranjuez, but largely absent at the Cuale VMS camp. In the spring of 2006, ZIM completed an airborne geophysical survey over the entire Almatea concession, including the Aranjuez District. Several promising electromagnetic anomalies were identified, and a short program of soil geochemistry and geological mapping was completed over selected anomalies in 2007. Results of the geochemical work are below. Contour map of Lead geochemistry in soil samples. The best in-situ lead anomalies occur in the Descubriadora and Dome target areas. Downstream of the "Aranjuez" smelter, lead-in-soil is probably due to contamination related to smelting. Contour map of Zinc geochemistry in soil samples. The "Dome" target is the strongest geochemical anomaly for zinc on ZIM's landholdings, and is stronger than zinc contamination related to smelting. Contour map of Copper geochemistry in soil samples. Strong copper (and co-incident molybdenum) geochemistry occurs north of San Isidro. Contour map of Silver geochemistry in soil samples. Contour map of Gold geochemistry in soil samples. The strongest gold results are related to Zinc in the Dome target area. References Japan International Cooperation Agency/Metal Mining Agency of Japan, 1986, Report on the Cooperative Mineral Exploration in the Jalisco Area, The United Mexican States, Phase 2. 89 p. ("MMAJ") Maldonado-Reyes, J.A. and Evangelista Ramirez, 1996, Informe de la certificacion de reservas de mineral en la mina La America; fundo minero Aranjuez de la compania minas de Tapalpa, ubicada en el municipio de Talpa de Allende, estado de Jalisco, SGM Report 140405, 50 pages. Descubriadora Several historic workings occur in the Descubriadora area, including La Trinidad, La Eliza, the main Descubriadora Stope and Descubriadora West. ZIM's airborne resistivity mapping shows that the historic workings are co-incident with an east-west trending resistivity low over 1200 meters long. The bulk average result of 43 rock samples from the geophysical anomaly area is 77 g/t Ag, 0.2 g/t Au, 0.2% Pb, 0.4% Zn and 0.2% Pb. The best overall result is 472.9 g/t Ag, 0.44 g/t Au, 0.6% Pb. 0.06% Zn and 0.04% Cu across 1 meter from the Descubriadora Stope (sample 19170). Several other rock samples returned significant silver and gold values over widths of 1 to 3 meters (Fig. 1). Fig. 1. Map of the Descubriadora target, Aranjuez VMS camp. The resistivity low (red contours) is co-incident with anomalous geochemical results in soil and rock samples. Selected geochemical results for rock samples are shown. Fig. 2. Descubriadora Stope. Sample 19170 cut 472.9 g/t Ag, 0.44 g/t Au, 0.6% Pb, 0.06% Zn and 0.04% Cu across 1 meter. Fig. 3 Descubriadora Adit. The adit is flooded, but a grab sample of rock from a nearby dump yielded results of 187 g/t Ag, 0.35 g/t Au, 3% Zn, 1.18% Pb and 0.22% Cu (sample 19058). This adit may have been a drawpoint for ore from the overlying Stope. Mineralization occurs both as massive sulfides, and low-sulfidation zones. For example, sample 24110 contains only 1-2 percent sulfides, but values for silver are very high at 391 g/t Ag across 2 meters (Fig 1). Previous drill testing is not well centered either in the geophysical or geochemical anomaly areas. Further work, including drilling, is planned to fully test the precious and base metal potential of the Descubriadora anomaly. Dome The Dome target is a completely new discovery in the Aranjuez VMS District, and is characterized as the strongest soil anomaly for zinc (as well as co-incident silver, gold and lead) on ZIM's entire land package in western Jalisco State. Anomalous metal values in soil define an annulus surrounding a possible rhyolite dome. These early indicators suggest Dome could represent a classic Kuroko-type VMS target. Fig. 1 Map of the Dome target. Strong soil geochemistry occurs on the flanks of a possible rhyolite dome. This is a new discovery, therefore additional mapping and rock sampling is planned prior to drilling. |
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