Projects

MADISON PROJECT

Historic production from the 1880s to the 1950s
yielded an estimated 144,000 ounces of gold

PROJECTS OVERVIEW

Broadway’s 100%-owned Madison Cu-Au project is located in the heart of Montana’s prolific copper-gold belt, just 38 kilometers southeast of Butte’s billion-dollar epicenter and the world-renowned Butte copper mine. With some of the largest operating mines within a 90-minute drive, Madison benefits from proximity to established infrastructure and amenities, notably extensive road access.

In late October 2017, Broadway announced the discovery of a latite porphyry system at Madison. It was identified during Phase III drilling, which is ongoing, supported by a newly assembled geological model and focused on numerous high-priority targets. The porphyry targets are a focal point of Phase III drilling, which will test multiple high-priority targets identified through detailed 2017 programs. The targets extend over a two-mile-long by one-mile-wide zone of geophysical, geological and geochemical indicators.

Additionally, Phase III drilling will seek to expand existing high-grade mineralization at Madison after Phases I and II delivered extremely high-grade gold and copper intersections, including some of the highest grades intercepted in the western United States in recent memory. This earlier drilling targeted shallower skarn zones at Madison.

Figure 1: Madison Copper-Gold Project
Figure 1 – Possible drill targets: Mise-a-la-Masse target for massive sulfides; North Central and East Central target to test deep copper porphyry system; Northeast is target for massive sulfides; and, Southeast contains two targets for copper-gold porphyry.


Geological Model

Dr. John Childs and the Childs Geoscience Inc. (CGI) team have delivered to Broadway a Vulcan 3D model incorporating all available current and historical geological data from Madison. CGI concludes that the Broadway Cu-Au skarn district exhibits a multi-episodic mineralization history over a two-mile-long by one-mile-wide zone of skarn and alteration. The two-mile-long trend of geophysical, geological and geochemical indicators is characterized by regional-scale faulting, extensive marble development, propylitic alteration, auriferous and cupriferous late silicification in the form of jasperoids, and massive sulfides exhibiting strongly magmatic sulfur isotope values.

Figure 2: Deep Porphyry Exploration Model
Figure 2 – Interpretive cross section showing an inferred porphyry system at depth superimposed on a geologic section presented by the US Geological Survey (O’Neill, 1996).

 

Figure 3: 3D Model – Looking North
Figure 3 – Interpretive cross section showing an inferred porphyry system at depth superimposed on a geologic section presented by the US Geological Survey (O’Neill, 1996).

Broadway’s Madison property covers 2,514 acres consisting of six federal patented lode claims and 108 underexplored, unpatented mineral claims. Many unexplored areas at Madison hold significant potential.

Madison is fully permitted for advanced exploration and bulk extraction, with infrastructure and a small mining fleet for underground development. The property includes a past-producing underground mine that Broadway has refurbished.

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