Midland Exploration Inc. has announced that exploration work will continue on its Mythril Co-Mo-Au-Ag project, its wholly-owned project situated in Eeyou Istchee James Bay in Quebec.
Earlier in 2018, Midland Exploration performed a prospecting work that led to the discovery of the Mythril project, and then during the spring of 2019, the company completed a strategic investment with BHP Billiton Canada Inc., that totaled $5.85 million for copper exploration in Quebec.
The Mythril zone (Cu-Mo-Au-Ag), identified by the prospecting work in 2018, includes a range of mineralized sub-cropping boulder fields as well as Cu-Mo-Au-Ag showings that occur across a distance of over 3 km.
In 2019, a diamond drilling campaign was performed that produced grades up to 0.37 g/t gold (Au), 1.07% copper (Cu), and 8.87 g/t silver (Ag) (1.41% CuEq*) across 12.55 m in the MYT-19-06 drill hole (*Metal prices utilized to estimate CuEq: Au $1,285/oz, Ag $15/oz, Cu $2.77/lb, and Mo $10.90/lb. Metal recovery is believed to be 100%).
The new 2021 exploration program will include prospecting work, geophysical (IP) surveys close to the Faramir Cu-Mo showing, as well as a diamond drilling program on targets produced from the latest 3D model for the Mythril Co-Mo-Au-Ag zone.
Geophysical IP Survey to be Completed on the Faramir Cu-Mo Showing
In the winter of 2020, Midland Exploration initiated a pole-dipole (n=20) induced polarization survey, developed to check the deeper bedrock, close to the fault, hosting the Faramir showing, and to detect chargeability (IP) anomalies.
These anomalies indicated the more mineralized portions of the Cu-Mo system. Around 50% of the survey was concluded before it was interrupted by the COVID-19 crisis.
Inside the survey grid, the IP line is situated furthest to the southeast and reveals a deep chargeability anomaly in the fault zone, probably representing a more robust mineralized portion of the system.
The rest of the IP survey, totaling about 20 km, will be concluded during the winter of 2021, in view of the prospective drilling program in the summer of 2021.
The Faramir showing is the latest copper-molybdenum occurrence, in which four grab samples produced an average grade of 0.17% Cu, with locally anomalous molybdenum values of up to 0.02% Mo and the highest grade of 0.34% Cu.
The Faramir showing contains disseminated chalcopyrite in extremely altered granite with robust chlorite, quartz, epidote, and ankerite veining. This showing seems to be linked to a late brittle fault trending Northwest-Southeast, which can be clearly observed on regional aeromagnetic maps.
In total, 22 granitoid boulders with chalcopyrite mineralization were also detected in the vicinity (Boromir boulder field).
The granitoid boulders are highly altered and show strong veining (chlorite, quartz, ankerite, and epidote). Grab samples produced an average grade of 0.12% Cu, with the highest grade of 0.45% Cu produced by sample S410734.
The granitoid boulders are extremely analogous to the Faramir showing and are distributed across an area of about 1 km by 500 m. They are construed as being derived from the same fault zone as the Faramir showing.
The new boulders and showings are regarded as the external zone (propylitic alteration) of a magmatic-hydrothermal system.
New Targets from the 3D Model and Drilling Campaign (2,500 m) to Come in 2021
In the last one year, Leapfrog was used to build a 3D geological model of mineralization in the main region of the Mythril project, to better interpret the controls of the mineralized system at the Mythril project.
The mineralized envelope was modeled to find out where excess Cu-Au-Mo-Ag mineralization could be identified. Besides this, new drilling targets were discovered by analyzing the links between geology, geophysics, and alteration.
A few of these targets include untested regions in which conducive geophysical and geological settings were detected. Such settings contain IP anomalies defined by chargeability highs and/or magnetic anomalies close to the southern contact with the conglomerate unit. There were other targets that included potential extensions of higher-grade mineralized zones.
At present, Midland Exploration is finalizing the logistical planning and details of a drilling campaign, totaling over 2,500 m, set to commence in June 2021.