San Marco samples up to 13.3 g/t Au, 633 g/t Ag at Buck
2020-09-28 10:47 ET - News Release
Mr. Robert Willis reports
SAN MARCO SAMPLES UP TO 13.3 G/T GOLD AND 633 G/T SILVER AT THE BUCK GOLD-SILVER PROPERTY, CENTRAL BRITISH COLUMBIA
San Marco Resources Inc. has released its results from its summer exploration program and commencement of an induced polarization (IP) geophysical survey at its 100-per-cent controlled Buck gold and silver property in central British Columbia, Canada.
The 22,000 hectare Buck property is located approximately 12 kilometres south of Houston, B.C., via an all-weather access road. It has excellent nearby infrastructure and allows for year-round exploration. Phase 2 drilling is currently under way on the Buck property (see news release dated Sept. 8, 2020).
Highlights
- A 700 by 300 metre multielement soil anomaly, open to the north, was defined at Buck North centered one km north of historic drilling.
- Grab samples returned assays of up to 13.3 grams per tonne gold and 44.1 g/t silver from the Trench zone, and 11.1 g/t Au with 5.9 g/t Ag from the Horseshoe zone, confirming the presence of higher-grade epithermal-related mineralization throughout the Buck property.
- A 20 line-kilometre IP geophysical survey has commenced.
- Five HQ diamond drill holes are now complete.
Rock geochemistry
A program of geological mapping and rock sampling was completed in preparation for drilling. A total of 104 grab samples were collected from throughout the Buck property. Sampling was focused primarily on the Buck breccia complex and the Buck structural corridor (see news release dated Aug. 6, 2020).
SELECTED GRAB SAMPLES Sample Zone Rock type Au (g/t) Ag (g/t) Zn (%) A0603833 Trench dacite 13.30 44.10 0.25 R266301 Trench dacite 7.20 14.95 0.59 A0603824 Trench dacite 5.40 186.00 0.06 A0603832 Trench lapilli tuff 5.30 24.80 0.05 A0603827 Trench dacite 1.71 16.95 0.97 A0603837 Trench dacite 1.19 8.75 0.01 A0603848 Horseshoe dacite 11.10 5.86 0.01 R266315 Horseshoe dacite 4.72 86.00 2.88 BKBBR002 Horseshoe dacite 3.70 4.14 0.06 A0603819 Horseshoe lapilli tuff 1.23 5.24 0.02 BKBBR014 Horseshoe lapilli tuff 0.57 34.30 0.47 R266334 Bob lapilli tuff 0.02 633.00 0.28 R266335 Bob lapilli tuff 0.00 168.00 0.12
Systematic sampling of mineralized, northwest-striking structures along Bob creek, which forms the core of the Horseshoe zone, suggest that low-angle shear-zones carry higher-grade mineralization (sample A0603848 in the table included) and that structural intersections with high-angle structures are also favourable hosts for gold mineralization. The orientations of these structures and intersections helped inform the orientations of some of the current Phase 2 diamond drill holes (see news release dated Sept. 8, 2020).
The Trench zone comprises an area of historic trenching covering a footprint of approximately 200 by 220 m where local near-continuous Au mineralization has been reported from chip sampling and local historic drilling (see news release dated June 23, 2020). The zone is underlain primarily by quartz-plagioclase porphyritic dacite and polymictic breccia that hosts clotted and vein-controlled pyrite-sphalerite mineralization. Sampling of the trenches have returned many greater than one g/t Au samples which confirm historic data and also suggests a strong structural control. Additional structural mapping focused on the higher-grade areas (sample A0603833 in the table included) in the Trench zone is warranted in order to refine drill targets.
The Bob zone is 1.5 km west of the Horseshoe zone and consists of near-vertical, northwest striking quartz-pyrite-arsenopyrite-sphalerite shear-hosted veins and vein-breccias that crosscut andesitic lapilli tuff which have been exposed in historic audits and workings. These veins and vein breccias (2 to 50 centimetres) have returned assays of up to 633 g/t Ag (sample R266334). The extent of these veins is not presently known and the area warrants detailed follow up.
Grab samples are used to provide evidence of mineralization, however, grab samples are selective in nature and the resulting assays from the samples may not be representative of all mineralization on the property.
Soil geochemistry
A recently completed 26 line-kilometre soil grid consisted of 679 samples collected from 24 north-south lines spaced 25 to 100 m apart with samples spaced 25 to 50 m along the lines. The center of the grid is located one km northwest of the Horseshoe zone and one km north of the Trench zone where the bulk of historic drilling has taken place. Within the northern grid, a 700 by 300 m multielement soil anomaly (Zn, Ag, As and Pb) has been identified. This anomaly is open to the north. The east to west trending, multielement anomaly along Bob creek is interpreted to have been transported and therefore limited significance is placed on the anomaly.
Geophysical survey
A 20 line-kilometre IP geophysical survey has now commenced. This north to south oriented survey consists of nine lines spaced 200 m apart. The survey footprint covers the Buck breccia complex as well as the recently defined soil-anomaly at the Buck North zone. This survey will have a significantly deeper depth of investigation compared to historical 1980s-vintage surveys and the data will be used to refine the current exploration model.
Health and safety
The company's exploration programs are being carried out in full compliance with federal, provincial and municipal guidelines established in response to the global COVID-19 pandemic. San Marco has a rigorous infection prevention and control protocol in place to protect the health of employees, contractors as well as surrounding communities in which we work.
Quality assurance
All sample assay results have been monitored through a quality assurance/quality control (QA/QC) program. Samples were shipped in sealed and secure bags to the ALS Global laboratory in North Vancouver, B.C., for analysis. Samples were prepared using standard preparation procedures. Soil samples were analyzed for 53 elements by ICP-MS on a 25 gram sample using an aqua regia digestion (method AuME-ST43). Rock samples were analyzed for 48 elements by ICP-MS on a 0.25 gram sample using a four acid digestion (method ME-MS61L). Gold was analyzed by fire assay with an AAS finish (method Au-AA23). Overlimit gold (greater than 10 parts per million) was reanalyzed by fire assay using a gravimetric finish. Overlimit silver (greater than 100 ppm) was reanalyzed using a four acid digestion and ICP-AES finish. Overlimit zinc (greater than 10,000 ppm) was reanalyzed using a four acid digestions and ICP-AES finish. ALS Global is registered to ISO/IEC 17025:2017 accreditations for laboratory procedures.
About San Marco Resources Inc.
San Marco is a Canadian mineral exploration company actively pursuing world-class gold, silver, zinc and copper projects with a focus in mining friendly jurisdictions in both British Columbia and Mexico.
The company's principal focus is the Buck property in north-central British Columbia that has bulk-tonnage gold and silver potential. The property is located in a mining-friendly region that includes many former and current operating mines. The company's portfolio also includes several prospective, early stage exploration properties in Mexico.
National Instrument 43-101 disclosure
This news release has been approved by San Marco's chief executive officer, Robert D. Willis, PEng, a qualified person as defined in National Instrument 43-101, Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators. He has also verified the data disclosed, including sampling, analytical and test data, underlying the technical information in this news release.
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