Arizona Silver Exploration Inc (CVE:AZS) (OTCMKTS:AZASF) said Tuesday that a number of drill holes on its Philadelphia project have intersected a vein and contained isolated visible gold grains of up to 1.25 millimetres.
The Vancouver-based explorer said it has completed 21 reverse circulation drill holes on the project, with 15 of the holes hitting the vein.
Fire assays on the drill samples returned values of up to three grams per ton (g/t) gold across a minimum sampling width of five feet.
READ: Arizona Silver Exploration confident that mineralization extends at depth on Philadelphia property
In a statement, Arizona Silver told shareholders that the numbers “do not reflect the expectations based upon the presence of visible gold,” so it performed metallic screen analyses on the samples of the vein containing visible gold. Results from metallic screen analyses did not vary appreciably from the results by fire assay, the company said.
“In an attempt to further evaluate the presence of coarse gold, and to address sampling issues attendant to coarse gold, the company has made arrangements to evaluate an initial seven samples by total consumption metallurgical tests,” it added.
Approximately 20 kilograms of each drill sample will be subject to gravity concentration, cyanidation bottle roll tests, and tail analyses, with all fractions analyzed and assay results combined to determine a calculated head grade of each sample interval, Arizona Silver said.
The firm also revealed it had drilled two holes down-dip of the vein and beneath the old underground workings at Philadelphia, below the 400-foot level where previous mining activities ceased on the historic producer. Both holes intersected the vein on the property.
Arizona Silver believes that the material extends even further below the 440-foot mark. Recent drilling hit the vein at 660 feet – lower than anything previously recorded on the property – and the interval, which is currently at a laboratory to test for grade, has the same material as that previously recorded.
Additionally, the company will mobilize a core rig to the Ramsey property, also a historic silver producer, to test the high-grade zone of the Creosote vein and surrounding mineralization. Drilling will also test the continuity of mineralization below a polymetallic soil geochemical anomaly.
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