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Maple Gold completes regional airborne Mag-EM survey

Published by
Global Mining Review,


Maple Gold Mines Ltd has announced that the 50/50 joint venture (JV) between the company and Agnico Eagle Mines Ltd has completed a regional airborne magnetic and electromagnetic (Mag-EM) survey to support exploration drill targeting across 278 km2of JV-controlled ground, including the western half of the Douay Gold Project and the entire Joutel Gold Project in Quebec, Canada. Results from the new Mag-EM survey were analysed alongside existing geological and geophysical data to identify anomalies of interest throughout the survey area that are prospective for pyritic gold and volcanogenic massive sulfide (VMS) styles of mineralisation.

Fred Speidel, VP Exploration of Maple Gold, stated: “A key pillar of our strategy is to focus drilling and exploration work in areas that exhibit potential for additional larger and higher-grade mineralised zones at Douay, while also testing the resource potential that remains along and beyond the entire past-producing Eagle-Telbel mine trend at Joutel. We are already drilling step-out and deep targets at both projects and these new Mag-EM survey results point to additional targets not only in the Eagle-Telbel mine area and along its lateral extensions, but also on the greater Douay property, where the company previously identified VMS targets via prospecting in 2018. We look forward to testing this next set of targets in upcoming JV drill campaigns.”

Interpretation and summary of results

The JV is currently ranking and prioritising at least four conductive target areas from the new Mag-EM survey for future drill testing:

  • Joutel Targets include several EM anomalies within ~2 – 3 km of the historical Eagle, Telbel and Eagle West deposits that have very limited drilling. These deposits appear as discrete ~250 m dia. conductive zones aligned along a well-defined northwest trend. Known gold mineralisation at Joutel is found along a series of subparallel structures over a strike length of at least 6 km along the Harricana/Joutel Deformation Zones associated with the Casa Berardi South Fault. The survey indicates possible similar structures extending more than 9 km further to the east in this area.
  • Southeast Targets occur along the largely undrilled Douay-Joutel property boundary, within the Cartwright Hills Group basalts that are prospective for a similar style of mineralisation to the Douay West and 531 Zones at Douay.
  • Central Targets at Douay, to the west of the current mineral resource area, are sparsely drilled and partly coincide and extend beyond VMS copper-zinc-(gold) (Cu-Zn-[Au]) anomalies defined during the company’s prospecting work in 2018.
  • Northwest Targets at Douay are associated with an intrusive-like magnetic anomaly that is over 2 km across. This target area is sparsely drilled and straddles the interpreted position of the Casa Berardi North Fault.

The Mag-EM survey utilised Geotech Ltd’s VTEMTM Plus Time Domain EM system with a horizontal magnetic gradiometer configuration, providing a maximum depth of investigation ranging from 250 – 700 m that is significantly greater than the maximum depth of about 150 m from historical surveys conducted in this area. It consisted of 2029 line-km flown using a 150 m line spacing and covered a 278 km2 area including the western half of Douay and all of Joutel.

Numerous conductive and magnetic anomalies were identified. Strong magnetic responses were noted, with a measured range of >5,700 nT, including two large (>5 x 8 km), intrusion-like, circular to elliptical anomalies along the northern and northeastern edges of the surveyed block.

Electromagnetically, the block is characterised as being largely resistive with sparse, moderate to highly conductive, EW to WNW-ESE linear trends occurring throughout, but mainly focused in the eastern half of the surveyed area. The western part of the block features a mainly larger area (>1 x 2 km) with EW elongate conductive responses, some of which may be lithologic. The eastern half of the block features a mix of numerous short strike-length (<150 – 500 m), discrete deeper conductor axes, mainly located in the northern part. Most EM conductors either closely parallel or coincide with magnetic high horizons. Apparent resistivities range from lows of <2-100 Ω-m to highs of 800 – 4500 Ω-m.

Read the article online at: https://www.globalminingreview.com/exploration-development/20072022/maple-gold-completes-regional-airborne-mag-em-survey/

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