Heritage Mining Expands Exploration Potential at DBL with New Mineralisation Style

At Zone 3 of the Drayton Black Lake project, Heritage Mining (WKN A3DTM6 / CSE HML) has discovered a style of gold mineralisation in its latest drilling that had not previously been encountered at the project. This is an intrusion-related gold mineralisation that is mainly contained in a granitoid.

In the past, exploration at Drayton Black Lake has focused on discovering orogenic gold hosted in the greenstone country rocks that surround the extensive granitoid areas. However, recent drilling at Zone 3 intersected mineralisation hosted primarily by a granitoid with a multi-element geochemical signature. These elements include coeval intrusive sequences and vein morphologies consistent with the intrusion-related gold model.

These exciting results were confirmed by Dr Gregg Morrison, an expert in intrusion-related mineral systems. The identification of intrusion-related gold opens up significant additional discovery potential for Heritage Mining in those geological formations of the Drayton–Black Lake project that have not been previously tested for gold.

The exploration strategy changes overnight and the exploration potential increases dramatically

The discovery represents a breakthrough for the development of the project, as this new style of mineralisation offers significant potential for large-scale, easily mineable deposits. For Heritage Mining, the exploration strategy has changed fundamentally almost overnight. Advised by Brett Davis and Dr Gregg Morrison, Heritage Mining is now well positioned to develop further opportunities and thereby significantly increase the value of the project.

At Drayton Black Lake, Zone 3 is located in the favourable contact zone between a granite intrusion (Lake of the Bays Batholith) and the mafic metavolcanic rocks of the Sioux Lookout Greenstone Belt. Gold mineralisation has been identified in both types of rock. However, the gold is mainly contained in the granite. This granite can be seen as a quartz-feldspar-biotite body, which is overlaid by a well-developed tectonic foliation and, as seen from above, has a diameter of at least 30 kilometres.

With the most recent drilling programme, Heritage Mining only tested a strike length of 200 metres within the contact zone. The drilling intersected feldspar pegmatite veins that predominantly run through the granite. These pegmatite veins form a layered arrangement above the batholith contact with the mafic host rock and resemble the granite in appearance.

The new finds are particularly significant because it now appears possible to confirm large-tonnage deposits. This has significantly increased the exploration potential of the project. As a next step, Heritage Mining now plans to conduct close-meshed magnetic and IP ground surveys. These are intended to define the favourable granitoid-metavolcanic contact and the zones with disseminated sulphides in quartz veins. This data will then be crucial in planning and executing further drilling programmes at the project.