Airborne Geophysics Survey Results Identifies Priority Targets to Expand Both the Known Mineral Resources and Expand on New Discoveries



Target GYA Geophysics Map

Apparent magnetic susceptibility map of Mazoa Hill, Marudi North occurrences and Toucan Ridge exploration area showing drill hole collars and surface trench location. Magnetic susceptibility highs are shown in purple, red and yellow.



Guyana Goldstrike Inc. (GYA.V) announced it has received the report on geophysical interpretation of the airborne magnetic and radiometric surveys on its Marudi Gold Project located in the Guiana Gold Belt, Guyana, South America.


Direct measurement on drill core from previous campaigns correlates strongest magnetic susceptibility from quartzite-metachert, the primary host rock for mineralization

3D magnetic inversion confirms direct spatial association of known Au mineralization at Mazoa Hill and Marudi North with strong magnetic responses

Brownfields targets identified adjacent to and at depth at Mazoa Hill which could add to current mineral resource
Less than 10% of the strike length of the Mazoa Hill magnetic horizon has been drilled, the remaining ~5km strike length is considered underexplored

Magnetic anomalies along Toucan Ridge correlate to anomalous Au from surface trenching and offer additional drill targets
Numerous greenfield targets based on magnetic responses exist, recommended for surface trenching or shallow drilling to upgrade

Mr. Peter Berdusco, President and CEO states, “The geophysics interpretation has greatly advanced our understanding of the controls on gold mineralization on the Marudi Gold Project and identifies priority targets to both expand the known mineral resource and discover new occurrences."

The geophysical survey confirms the direct correlation at large scale of mineralization at Mazoa Hill with a band of strong magnetic susceptibility.


Mazoa Hill Geophyiscs Map


3D inversion of magnetic susceptibility vertical section, north facing, through Mazoa Hill occurrence showing historic drill hole traces (in black). Magnetic susceptibility highs are in yellow and red.


Mazoa Hill Zone 2012 Select Drill Results

Hole No. Azimuth (degrees) Dip (degrees) Final Depth of Hole (m) From (m) To (m) Interval (m) Gold grams/ tonne
MH12-130 181° -50 68.3 3 11 8 1.63
      including 3 6.33 3.33 3.5
        59 65.5 6.5 14.85
      including 63.17 64.63 1.46 51.7


Mazoa Hill Zone Mineral Resource Estimate in Conceptual Open Pit 
Class Tonnes Au Capped g/t Au Uncapped g/t Ounces Capped Ounces Uncapped
Indicated 4,428,000 1.8 1.9 259,100 269,700
Inferred 1,653,000 1.6 1.6 86,200 87,600





Three types of geophysical targets have been identified for further investigation: along strike and deeper than the known mineralization (Mazoa Hill and Marudi North), to expand the known mineral resource; under the anomalous Au assay results from trenching in the Toucan Ridge exploration area; and numerous magnetic anomalies of similar character across the Property. The targets near the known mineralization from previous drilling and trenching are ready for the next stage of detailed modelling to optimize logistics and trajectories for drilling, whereas targets farther afield would require trenching or shallow drilling to rank prospective targets.


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