Come By Chance – Gold-Copper
The 2020 exploration program results provided the essential information that revealed the CBC property has significant potential for a large copper/gold related porphyry discovery
Belmont’s CBC copper-gold porphyry project is located in the prolific copper belt of British Columbia known as the Quesnellia trough. This belt has been described as one of the most prospective geological areas for gold and copper within Canada. The Quesnellia Trough is important from an economic perspective due to its rich endowment of gold copper gold porphyry deposits. These large-tonnage deposits are sought after by major mining companies because of their open pit, low cost operating features and long mine life.
Situated within the Quesnellia Trough is the prolific Greenwood Mining Camp which is considered to be one of the most concentrated mineralized areas in British Columbia. 26 principle mines were operational in this area, and produced over 550 Million pounds of copper and over 1.5 Million ounces of gold.
The CBC property is very accessible being only 5 kilometers outside the town of Grand Forks, three kilometres to the southeast of the past producing Phoenix mine and directly across Provincial Highway #3 of the company’s A-J gold property. Highway #3 and a power line cross the edge of the CBC property.
Historic exploration on the property revealed many indications to a potential concealed intrusive of copper/gold mineralization at the Betts Mine, in the skarns, the free gold and the intersection of a massive sulfide epithermal indicated zone in the Betts mine.
Belmont’s 2020 CBC Property exploration was therefore programed to locate the area of the potential intrusive and to delineate specific locations for follow-up exploration.
Initially, a Lidar survey was completed resulting in the disclosure of numerous indicated lineament structures that may have facilitated the creation of the isolated skarn zones.
A follow-up, low-level magnetic survey of the CBC property, has provided a greater indication of the volcanic caldera which associated with a distinctive magnetic low, measuring 800 meters by 1000 meters, bounded by magnetic highs on the south west and north east sides, along with the trending Eagle Mountain and Eagle creek faults. This particular magnetic signature is associated with other copper gold porphyry systems in the Quesnella trough.
Belmont is planning an IP survey over the magnetometer anomaly at the CBC property which by structurally related, surficially exposed, mineralized breccia zones, shows the extension of the magnetometer anomaly to a depth of 525 metres below surface, open to depth and length and up to 2,800 metres wide, should provide a prime anomalous IP target for an initial 500 metre diamond drill hole
The Importance of Hydrothermal Brecciation
Hydrothermal breccias usually form at shallow crustal levels (<1 km) between 150 and 350 °C, when seismic or volcanic activity causes a void to open along a fault deep underground. The void draws in hot water, and as pressure in the cavity drops, the water violently boils. In addition, the sudden opening of a cavity causes rock at the sides of the fault to destabilise and implode inwards, and the broken rock gets caught up in a churning mixture of rock, steam and boiling water. Rock fragments collide with each other and the sides of the void, and the angular fragments become more rounded. Volatile gases are lost to the steam phase as boiling continues, in particular carbon dioxide. As a result, the chemistry of the fluids changes and ore minerals rapidly precipitate. Breccia-hosted ore deposits are quite common.
The morphology of breccias associated with ore deposits varies from tabular sheeted veins and clastic dikes associated with overpressured sedimentary strata, to large-scale intrusive diatreme breccias (breccia pipes), or even some synsedimentary diatremes formed solely by the overpressure of pore fluid within sedimentary basins. Hydrothermal breccias are usually formed by hydrofracturing of rocks by highly pressured hydrothermal fluids. They are typical of the epithermal ore environment and are intimately associated with intrusive-related ore deposits such as skarns, greisens and porphyry-related mineralisation. Epithermal deposits are mined for copper, silver and gold.
Magnetic Survey & Mineralized Showings
CBC Magnetic Inversion Section Facing NW
CBC Magnetic Inversion Plan 500m Depth
Quesnellia Trough, British Columbia
Greenwood-Republic Mining Camp
Lidar Survey & Mineralized Showings
Conceptual Model for Styles of Epithermal Gold-Silver, Breccia and Porphyry Copper Mineralization
Come By Chance Brecciation
Explosive hydrothermal brecciation. The interesting feature is the light grey fragments which appear the color of arsenopyrite (FeAsS), a mineral that can also can be associated with significant amounts of gold
The brecciated quartz veins indicate the iron content was derived from metamorphism caused by the quartz intrusion; although the iron may have been emplaced at various stages.