Talk
Mountains graphic with white diamonds on itGeoscience and Exploration

Precious Metals-rich VMS mineralization at Nelson Lake, NWT

Tuesday, November 19, 2019 - 10:40am to 11:00am Theatre One

Author(s)

D.R. Webb (Presenting)
New Discovery Mines Ltd.

The Archean Yellowknife Greenstone Belt is known for its shear zone-hosted gold deposits, dominated by the Giant Yellowknife Mine (pp 8.1 m oz. Au), Con Mine (pp 6.1 m oz. Au) and the high-grade vein deposit Discovery Mine (pp. 1 m oz. Au).  The greenstone belt extends from beneath the waters of Great Slave Lake northwards to beyond the Discovery Mine for over 100 km.  Minor volcanic, quartzite and banded iron formation of the Central Slave Cover Group are overlain by mafic-dominated tholeiitic volcanic rocks of the Kam Group.  These in turn are overlain by calc-alkaline intermediate and felsic volcanic rocks of the Banting Group which near the top are interbedded and overlain by turbiditic sediments of the Burwash Group.  A number of distinct syn and post-depositional intrusions form dykes, sills and plutons within the greenstone belt.  The Nelson Lake precious metal-rich VMS deposit was discovered within the Kam Group by following up a property-wide biogeochemical survey conducted in 2018.  Initial grab samples up to 2.30 gpt Au, 360 gpt Ag, 3.83% Pb, and 1.94% Zn was followed up by a VTEM Plus ® airborne survey where seven isolated anomalies were prioritized.  Recent trenching on the 5656 anomaly has exposed 0.4 to 2.1 m wide sulphide zones dominated by tetrahedrite, pyrrhotite, sphalerite, galena, arsenopyrite, and galena.