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Project
Larder Lake Project
Location
Larder Lake, Ontario, Canada
Methods
Drone-borne Magnetics and Lidar
Anomaly Type
Subsurface Gold Deposits
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Peter Colbert
Chief Financial Officer
Throughout the duration of the project, Rosor maintained clear and efficient communication with our team. They demonstrated a strong commitment to meeting deadlines by processing the collected data within a very tight time-frame, ensuring that our exploration schedule remained on track. We found our collaboration with the Rosor team to be highly enjoyable and productive. Based on this positive experience, we are eager to continue working with them in the future.
Background
The majority of the time, a drone-borne survey will be collected as one block with one contractor. In November 2024, St Barbara contacted Rosor to collect drone-borne magnetic data as an extension of a previous survey to the east and northwest. Review of the previous dataset revealed that no tie-lines were flown for the survey, which meant custom levelling techniques were used to properly level the data to remove residual line-related noise.
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Reprocessing of the previous data greatly improved the quality of the survey, which led to seamless merging of all three blocks into a single cohesive survey. The merged survey – corroborated by magnetic vector inversion – reveals two large magnetic bodies associated with gold mineralization.
Outcome from Survey
Rosor successfully collected, processed, reprocessed, and merged three separate magnetic datasets into a single cohesive survey covering the full Cochrane Hill Project. The previous contractor's dataset, which lacked tie-lines and carried significant line-related noise, was reprocessed using custom levelling and microlevelling techniques that substantially improved overall quality before merging.
The suture stitch method was applied to seamlessly integrate all three blocks into one high-resolution dataset, revealing multiple east-west trending magnetic anomalies across the project area. Magnetic vector inversion performed on the merged grids successfully delineated two strong, steeply-dipping magnetic bodies associated with the Cochrane Hill anticline.
The program was mobilized and completed within a tight timeframe, demonstrating Rosor's ability to respond quickly and deliver under schedule pressure without compromising data quality or processing standards.
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