The Regnault gold deposit in Quebec, Canada, was discovered by Kenorland in 2020 following identification of a gold-in-till dispersal train. In 2022, two non-traditional media—eskers and organic lake-bottom mud (gyttja)—were sampled to determine if they likewise contained gold anomalies that vectored the mineral deposit. Striking, coherent (mappable) anomalies exist in both media. The gold-in-esker dispersal train has a similar pathfinder element association as the gold-in-till dispersal train (e.g., Te, W) but contains approximately twice the gold (average 73 ppb Au) in the <63 um fraction. It is hypothesized to be a meltwater-sorted version of the gold-in-till train, sourced from the erosional esker corridor some 3 km upflow. By contrast, the gold-in-gyttja dispersal train is substantially different than both the gold-in-esker and gold-in-till dispersal trains. It has lost significant association with pathfinder elements, contains an order of magnitude less gold (average 4.2 ppb Au), and is tentatively hypothesized to have a hydromorphic origin, sourced primarily from the gold-in-till dispersal train. The main takeaway from the study is that the sampling of any of these three media—eskers, gyttja or till—could have conceivably led to the discovery.

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