VANCOUVER, British Columbia, March 06, 2018 (GLOBE NEWSWIRE) -- Broadway Gold Mining Ltd. (TSX-V:BRD) (OTCQB:BDWYF) (“Broadway” or the “Company”) is pleased to provide an update on its Phase III surface drilling program at the Company’s 100%-owned Madison copper-gold project in the historic Butte-Anaconda mining region of Montana, USA.
Recently, Broadway has documented a well-mineralized, two-mile-long geological, geophysical and geochemical trend at Madison. Key highlights to date include:
•Confirmed new porphyry discovery in regional trend near Butte region;
•Latite porphyry intercepted in holes C17-24 and C17-27;
•Porphyry body appears to be of significant size with intercepts to date measuring up to 234 meters and open in all directions;
•Anomalous gold, silver, manganese, lead, sulfur, strontium and zinc identified in the phyllically altered latite; and
•Geochemical analysis indicating characteristics consistent with gold or gold-coper-rich systems.
"Our discovery of the quartz latite porphyry in C17-24 pointed to a potential deep source for the broad zone of skarn-jasperoid mineralization delineated near surface in our previous drilling,” said Duane Parnham, President and CEO of Broadway. “The presence of anomalous gold and copper grades, the length of the porphyry intercepts and Whole Rock Analysis of the core from Phase III drilling now support our belief that Madison is capable of hosting a large hydrothermal system and concentrating sufficient gold, copper and sulphur to form a significant deposit.”
Based on Whole Rock Analysis interpretation performed by Rex McLachlin, Consulting Senior Geologist for Childs Geoscience, analysis of local intrusive rocks encountered in the Phase III drilling show compositions consistent with a gold-rich or gold-copper-rich productive magmatic-hydrothermal system. Noteworthy attributes include evidence of high-pressure fractionation of hornblende from a hydrous, calc-alkaline magma. Such magma is capable of forming both large hydrothermal systems as well as concentrating sufficient gold, copper, sulphur and water to form a deposit.
Mr. McLachlin notes, “The latite porphyry at Madison has low Y and Zr levels and high Nb, Th and Ba levels indicating the system is highly prospective for copper and particularly gold. Gold-productive magmas have higher than average Nb/Zr ratios in 98% of cases and higher Th/Zr ratios in 80% of cases. The geology at Madison is well above average for both of these ratios. Similarly, Madison exhibits significantly lower Zr levels than comparable barren calc-alkaline suites, which is typical of known copper, copper-gold and gold porphyry deposits.”
Madison Porphyry Model
A photo accompanying this announcement is available at http://www.globenewswire.com/NewsRoom/AttachmentNg/70150608-1465-4ad8-898a-7bf71ee26f4b
Seven holes totaling 2,323 meters have now been drilled to complete Phase III as Broadway aggressively and systematically tests IP targets highlighted during the property-wide survey completed in 2017.
Final drilling assay results have been reported for C17-27 with results confirming the presence of anomalous gold, silver, manganese, lead and zinc. The anomalies are found in sections of core exhibiting weak phyllic alteration halos around quartz-calcite-pyrite micro-veinlets where enriched metal grades exist relative to the background values found in the propylitically altered latite as shown in Table 1.
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