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Bell Copper's MT Survey Identifies Large Conductor at Big Sandy

Mining News - Published on Fri, 09 Oct 2020

Image Source: Bell Copper
Bell Copper Corporation has received the final report of a SPARTAN Magnetotelluric survey completed in August at its Big Sandy project, a large, truncated porphyry copper-molybdenum prospect located in northwestern Arizona, approximately 30 kilometers south of the Company's Perseverance Project.

Survey detected a large conductivity anomaly measuring 2400 meters by 2100 meters and extending at least 1500 meters vertically.
Apex of the anomaly is estimated to lie 150 meters below surface.
Core of anomaly has resistivities below 15 Ohm-meters.
Anomaly is contiguous with surficial copper-bearing fanglomerate discovered in July.
No copper occurrences had been previously reported in any government databases from the area, but upon field investigation by the Company, several surficial occurrences have now been discovered. The Company believes that the unusual copper occurrences may be linked to a shallowly covered porphyry copper deposit.

Quantec Geoscience Limited crews completed the SPARTAN MT survey at Bell Copper's Big Sandy property pursuant to strict COVID 19 safety protocols. The survey started out as 61 deep search geophysical soundings over the area, but was quickly increased to 78 total soundings after fanglomerate carrying angular pieces of chrysocolla and chalcocite were discovered and the Company expanded its claims east of the initial survey area.

Interpretation of survey reveals a large 2400 meter by 2100 meter conductive anomaly that is believed to be hosted by Precambrian crystalline igneous rocks similar to those seen in outcrops east of the Company's claims. Whereas pristine, unaltered Precambrian crystalline igneous rocks would be expected to have electrical resistivities of 1000 Ohm-meters or higher, the modeled resistivities in the core of the anomaly are below 15 Ohm-meters. The Company believes that this 60-fold reduction in expected resistivity might indicate the presence of copper porphyry-related sulfide mineralization and hydrolytic alteration contiguous with the copper-bearing fanglomerate on the surface of Big Sandy.

Interpolation between outcrops east of the Company's property and bedrock intersections in shallow water wells to the west supports the MT interpretation that depth of cover over the conductor is in the range of 150 meters to 200 meters. The angular nature of the clasts in the copper-bearing fanglomerate is consistent with a nearby source, like the immediately contiguous MT anomaly rather than the 14-kilometer-distant footwall porphyry outcrops.

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Posted By : Yogender Pancholi on Fri, 09 Oct 2020
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