Chunibas Drill Program Expanded After Discovery of Large Intrusive Breccia System
VANCOUVER, BC - San Marco Resources Inc. has increased the Chunibas HQ core drilling program, in Mexico, from four to six holes following the discovery of an extensive, previously unknown, intrusive breccia associated with mineralization encountered during the current drill phase. Management considers this to be a very important discovery and is working on multiple fronts to ascertain how to best explore it and determine its economic significance.
Bob Willis, San Marcos CEO stated, "It is very early days, but we don't want to understate the potential significance of this discovery. It's too early to classify this new discovery though it has affinities to both breccia-hosted and intrusive-hosted systems, which are host to some large gold and gold-copper discoveries worldwide made in the recent past.
"Our core drilling, the first on the property, allowed us to log long contiguous sections of rock unaffected by surface weathering, something unavailable to past workers. This led to the discovery of the new intrusive breccia in all holes drilled so far, extending from the top to the bottom of the holes in most cases. Subsequent prospecting confirmed the breccia extends at least 200 meters west and 300 meters south of the Hole 1 and Hole 4 areas and it remains wide open. The area will be remapped to determine the surface extent of the breccia but early indications from our widely spaced drill holes is that it is fairly large. While we need to understand zoning or other possible controls on gold emplacement, we are highly encouraged that all core containing breccia assayed to date exhibits at least anomalous (greater than 50 ppb) gold values. It will be exciting times as we work to define the magnitude of the system, refine and better understand the geological model and locate zones of mineralization with economic interest."
The primary objective of the current drill program was to confirm the presence of higher grade mineralization within narrow (1 - 2 metres wide) shear zones, and possibly low-grade mineralization in the flanking wall rock. Exploration by previous property owners consisted exclusively of surface work and RC drilling. They concluded the Chunibas system was of the low sulphidation, epithermal type with mineralized shears / veins hosted in a monzonite intrusion. The San Marco core-drilling program was designed to test three separate areas of old workings and presumed shearing along approximately 1,000 meters of north-south strike.
Upon commencement of drilling and logging of the core, it immediately became apparent that the dominant rock type in the drill core is a multi-lithic (breccia fragments of different compositions) highly altered, intrusive breccia, and NOT monzonite. Two holes (drilled to the east at - 60 degrees) around the southernmost workings intersected breccia from the collars to total depth (154 meters and 201 meters respectively). Additional holes completed to date have intersected breccia as well. Drilling has now been concluded, with approximately 860 meters completed in the six core holes. Following are the results of three holes, one each in the three areas of old workings over 1000 meters of strike.
All holes were drilled at - 60 degrees inclination and azimuths of CHD-01: 90 degrees; CHD-02: 305 degrees; and CHD-03: 90 degrees. True widths are presently unknown, as the discovery holes do not have enough information yet to identify where the holes are located in the mineralized system.
Assaying for this drill program is being done by ALS Chemex located in Vancouver, B.C. Sample preparation is done at the Chemex lab in Hermosillo, Mexico, pulps are then shipped to Vancouver for analysis. Prepared samples are analyzed for gold by the Au - ICP21 method and multi-elements by ME - MS61, preparation 31B.