Sonora Resources has entered into an option agreement with Yale Resources to acquire a 70% interest in the Los Amoles property.
The Company has identified the high grade potential for the project with highlight samples including 2.0 meters grading 0.63 g/t goldand 698.6 g/t silver, 6.0 meters averaging 0.33 g/t gold and 226.6 g/t silver (including 2.0 meters grading 0.63 g/t gold and 497.3 g/t silver), 1.0 meters grading 0.33 g/t gold and 496.8 g/t silver and dump material grading 0.24 g/t gold and 1,027.5 g/t silver.
Samples from Los Amoles were prepared and analyzed by IPL Inspectorate in their facilities in Mexico and Canada, respectively. Samples generally consisted of one to three kg of material. Gold and silver analyses were performed by 30-gram fire assay with an AA finish. Samples with greater than 100 g/t Ag were re-assayed using gravimetric methods.
The 3.590 hectare Los Amoles property is located approximately 150 kilometers northeast of the Hermosillo, Sonora state, Mexico. The property is 10 kilometers northeast of the producing La Caridad mine, operated by Grupo Mexico, which is one of the largest mining and processing complexes in Mexico. Reconnaissance-style sampling has initially concentrated on the one-by-2.5-kilometre Rosario target area.
The claim is 3,590 hectares in size.
The Company has confirmed the high grade potential for the project and ongoing work will involve continued sampling of the numerous workings as well as outcrops. To-date, the company has engaged the services of Derrick Strickland, MBA, P.Geo. to prepare a National Instrument (N.I.) 43-101 compliant technical report on the prospect. As with many projects in Mexico that have seen small-scale production from high-grade veins, most of the historic workings have mineralized dumps located nearby. The quickest method of evaluating an area is to sample these dumps as they tend to be the low-grade material that has been left behind. During our recent geophysical investigation (2011) dump material grading 0.24 g/t gold and 1,027.5 g/t silver was identified.
Over 45 historic workings and more than 20 gold/silver veins have been identified throughout much of the option lands. Upon analysis of the geophysics program, Sonora Resources has elected to undertake the indicated project development fieldwork in order to establish priority locations for a subsequent drill sampling program.
The work at Los Amoles has advanced the project significantly by concentrating on a two by three kilometer mineralized zone defined by a strong color anomaly and containing 60 known veins with strike lengths up to 1 kilometer, 40 known historic workings (adits and excavations) and 19 known shafts.
Recent sampling tested new areas and successfully expanded the number of veins and workings now known to be within the core area. As the historic workings are newly rediscovered, the sampling concentrated on the mineralized dumps located at the opening of the historic workings and resulted in new data including the highlights below:
|Location ||Description ||Au |
|Terrero SE ||Vein material with local galena ||0.40 ||495.1 ||1.21 |
|Terrero SE ||Andesitic host rocks with quartz stockwork ||0.17 ||219.3 ||0.62 |
|Cata ||Vein material with local galena ||0.24 ||706.5 ||2.05 |
|Tiro Sur ||Argillic altered andesite with oxides, carbonates and local galena ||0.43 ||102.5 ||- |
|Terrero 14 ||Silicified andesite with strong oxidation ||1.15 ||451.7 ||- |
|Obra Rancho ||Vein and quartz-rich material ||0.53 ||295.3 ||0.38 |
|Obra Rancho ||Oxidized andesite host rock ||0.44 ||166.9 ||- |
The Rosales mine, located to the north of the core area, remains the most advanced target within the property. A series of underground workings were mapped, and in order to maximize the information to be gained, sampling was undertaken from the mineralized mine dumps focusing on vein material and volcanic host rocks which indicated the host rocks are strongly mineralized locally. Highlighted samples from the Rosales mine dumps include the following results:
|Location ||Description ||Au |
|Area Rosales ||Quartz-rich material and vein - strongly oxided ||0.43 ||705.6 ||0.48 |
|Area Rosales ||Quartz-rich material and vein with oxides and galena ||0.83 ||281.8 ||0.31 |
|Area Rosales ||Argillic altered andesite with oxides, carbonates and local galena ||0.29 ||133.4 ||- |
|Area Rosales ||Quartz-rich material and vein with oxides and galena ||0.71 ||253.5 ||0.41 |
|Area Rosales ||Quartz-rich material and vein with oxides and galena ||0.54 ||205.3 ||1.98 |
|Area Rosales ||Argillic altered andesite with oxides, carbonates and local galena ||0.32 ||443.9 ||- |
By sampling different rock types and mineralizing styles from the dump, the Company is able to sample material that has not been seen in outcrop. Sampling of rocks similar to the surrounding host rocks containing stringer-style veining have consistently returned silver values greater than one ounce per ton, which indicates that the potential for wider widths of mineralization may exist. Additionally, the fieldwork was also successful in grading samples of gold with higher values than previously identified.
The materialization within the property is characteristic of epithermal veins with varying percentages of sulphides consisting primarily of pyrite and arsenopyrite with some locations containing local chalcopyrite and sphalerite. The Mina Rosales area coincides with a regional magnetic anomaly. In addition, the entire area forms a large color anomaly, which is indicative of the oxidation of metals.
|Type ||Description ||Au |
|Mineralized Dump ||Dump #1 - Northernmost working within Rosario area ||0.13 ||109.8 ||0.90 |
|Mineralized Dump ||Dump #2 - 200m southeast of Dump #1 ||0.30 ||333.1 ||1.83 |
|Mineralized Dump ||Dump #4 - 250m southeast of Dump #1 ||0.29 ||176.6 ||0.54 |
|Mineralized Dump ||Dump #6 - 300m southeast of Dump #1 ||0.43 ||301.0 ||1.06 |
|Mineralized Dump ||Dump #9 - 850m southeast of Dump #1 ||0.83 ||190.4 ||0.36 |
|Mineralized Dump ||Dump #12 - 1.8km to the southeast of Dump #1 ||0.65 ||450.7 ||0.25 |
|Mineralized Dump ||Dump #13 - 1.8km to the southeast of Dump #1 ||0.38 ||287.4 ||0.15 |
|Mineralized Dump ||Dump #16 - 2.2km to the southeast of Dump #1 ||0.23 ||188.0 ||0.90 |
Additional potential within the Rosales area is demonstrated by widely spaced samples consisting of altered and mineralized andesitic host rocks that are in contact with structures and/or veins. The highlights of nine samples returned the following results:
|Sample ||Type ||Width (m) ||Description ||Au |
|49801 ||Channel ||1.50 ||Strongly fractured andesite with millimeter quartz veinlet's and iron oxides throughout ||0.06 ||18.3 ||0.62 |
|49809 ||Channel ||0.90 ||Silicified porphyritic andesite with fine grained sulphides ||0.52 ||333.4 ||0.61 |
|49813 ||Channel ||1.00 ||Silicified-argillic altered andesite within working with strong oxidation and fresh fine grained pyrite ||0.14 ||31.5 ||1.88 |
|49823 ||Channel ||1.00 ||From within small working - argillic altered andesite with quartz stockwork and oxides throughout ||0.56 ||231.6 ||0.04 |
|49827 ||Channel ||1.30 ||From within small working 30 m deep - altered andesite with quartz veins up to 5 cm wide. ||0.17 ||56.1 ||2.76 |
Work performed to date has concentrated on the Rosales area, at the south eastern edge of a 4.0 by 2.75 km regional magnetic anomaly. The Company's interpretation is that the Rosales area represents silver-lead +/- gold veins that are distal to a porphyry system. The potential for this regional anomaly to reflect a buried porphyry has yet to be tested. Many of the region's most significant porphyry deposits are located within 70 km of the Los Amoles property.
Recent geophysical interpretations identified eight (8) linear 500 to over 800 meter long features parallel to the trend of the known veins/structures within the property. The summary report prepared by the geophysical contractor concluded that "certain axis are representative of mineralized structures or veins whose potential has yet to be fully determined and should thus be further investigated" and recommended that three of the structures be drill tested.
Excerpt from the Los Amoles Ground Geophysical Survey Report
Within the framework of the Los Amoles Project, 28.0 line-km of magnetometer and induced polarization surveys were carried out between 26 April and 26 May, 2011. The present mandate also included line cutting as well as GPS surveying of the survey grid, in order for subsequent geo-referencing of the geophysical databases. Based on the geophysical results obtained, the following conclusions can be drawn:
• Magnetic results: The main veins that were delineated in the east-central part of the grid could be indicative of weak to marginal concentrations of ferromagnesian minerals, and consequently their signature is difficult to ascertain based on the results of the magnetic map.
• IP results: The center of the grid is characterised by a large N/S striking polarisable horizon which encompasses the Rosales Mine as well as the historic workings area to the South. The main chargeability anomalies are all found within the confines of this horizon and we believe that certain of them are indicative of mineralised veins. Three drill targets are proposed in order to test axes LA-2, LA-6 and LA-7, whose potential will be further ascertained based on the available data (see also section 4.2.2 and table 3).
Geophysical Survey Photos
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