Government of New Brunswick

Robert Murray

Frenchmans Creek IOCG


Commodity: Silver, Copper, Gold, Antimony, Zinc

Claim block number (units): 10391, 10977, 10985 (71)

NTS Location: 21 G/01

Contact Information: 506-566-1962
[email protected]

https://www.geosearcherinc.com/

   

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The Frenchmans Creek Project represents a newly discovered IOCG (iron oxide copper gold) with skarn style limestone/marble and rhyolitic intrusion-related breccias that are hosting potentially significant mineral deposits. The project was undertaken to advance what is known as the Frenchmans Creek mineral occurrence 544, that has not been prospected since 1968. The original veins discovered back in the late 1800’s was reported to vary in size and degree of mineralization with some containing argentiferous galena while others tetrahedrite and freibergite. Although there is no historical data of ore grade assay values of copper, gold, zinc, or lead, this occurrence records 50 oz/t silver. The location hosts a stockwork of parallel, narrow, closely spaced veins within a fractured limestone/marble at a rhyolite contact. They contain both disseminated and locally massive sulfides. These quartz-calcite, iron-carbonate veins contain galena, tetrahedrite/freibergite, sphalerite, and chalcopyrite. Additional mineralization in surrounding outcrops along a 3 km stretch of this faulted contact between the rhyolitic unit and the limestone/marble shows the potential for a large-scale skarn style deposit. 

Besides the Frenchmans Creek occurrence, the Marsh Brook mineral occurrence 1582 is also in this altered and brecciated rhyolitic unit. Here, ore grade copper, gold, antimony, and zinc were discovered in a highly brecciated rhyolitic unit showing comagmatic layering. The specularite-rich rhyolitic units also carry iron carbonate veining with tetrahedrites, with high concentrations of a honeycomb yellow sphalerite, gold, coppers of tetrahedrite, chalcopyrite, azurite, malachite, hematite, siderite and ankerite. This occurrence is approximately 2 km southwest of the Frenchmans Creek mineral occurrence.


Two initial samples at the historical workings confirmed the high-grade silver in the argentiferous galena. See appended images of 22FC54 (243 g/t Ag, 2990 ppm Cu, 1760 Sb, 2.48% Zn, and 14.2% Pb) and 22FC114 (2230 g/t Ag, 7.5 g/t Au, 6.4% Cu, 4.5% Sb, and 19.0% Zn). This rhyolitic IOCG breccia zone appears to be the result of faulted fracturing and iron carbonate veining forming in conjunction with a faulting and shearing event along the geological contact. The mineralization has been traced in multiple directions for over 1 km and there appears to be significant length and breadth to the mineralized and brecciated zone extending all the way to and along the coast. 
 


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