McFaulds Cu-Zn-Ag VMS Deposits


Overview

The McFaulds volcanogenic massive sulphide (VMS) deposits were the first discoveries in the ROF and spurred the initial staking rush in 2002-2003. Since then, more than six Cu-Zn rich VMS deposits have been identified on the property, two of which (MCF No.1 and No.3) have calculated resources. In 2015 Noront acquired an 85% interest in the McFaulds property through the acquisition of Cliffs Natural Resources’ assets in the ROF. The McFaulds property is now held jointly between Noront (85%) and KWG Resources (15%).

Early exploration on the property focused on near-surface mineralization easily detected with Airborne geophysics. However, after discovery of Eagle’s Nest and the various chromite deposits in the ROF, exploration shifted away from VMS to magmatic Ni-Cu-PGE and chromite. Noront holds an optimistic view of the potential for discovery of a significant Cu-Zn rich VMS deposit on the property on the basis of favorable geology, structure and hydrothermal alteration. Several geophysical targets from past campaigns remain to be tested.

Deposit Geology & Mineralization

Figure 1- Regional Geology of the southern ROF

Figure 1- Regional Geology of the southern ROF

The McFaulds VMS deposits are situated near the top of the Muketei Assemblage, stratigraphically above the ultramafic sills hosting the Ni-Cu-PGE and chromite resources and above the large Thunderbird layered ferrogabbro body (figure 1). High resolution age-dating by the OGS and GSC has determined the age of these underlying intrusive suites and the overlying volcanic succession to be virtually the same, suggesting the heat source for hydrothermal VMS mineralization at McFaulds may have been driven by cooling of these large, high-temperature magmatic bodies.

Figure 2- McFaulds property geology map

Figure 2- McFaulds property geology map

The McFaulds deposits are hosted within a northeast trending, northwest facing, folded sequence of altered felsic to intermediate tuffs and lesser flows. Mineralization consists dominantly of copper-rich stringers with lesser zones of zinc-rich banded sulfides. Broad zones of chlorite alteration mark the exhalative horizons with intense talc-magnetite zones immediately adjacent to or within the mineralized zones at MCF No. 1 and No.3. The copper-rich nature of the mineralization along with the presence of talc-magnetite zones attest to the high-temperature nature of the VMS hydrothermal system at McFaulds.

Based on the results of our recently acquired high resolution airborne magnetic survey and in conjunction with our re-logging and 3D modelling efforts, we have identified four main VMS horizons on the property (figure 2). From bottom to top these are: i) Tamarack horizon,
ii) MCF No.1, No.3 and No.6 horizon, iii) MCF No. 2 horizon,
and iv) MCF No. 4 and No.5 horizon.

Since initiating our VMS strategy in the fall of 2016 our understanding of the volcanic stratigraphy and mineralizing controls on the McFaulds property has improved dramatically. We will continue to unravel the geological story in the hopes of uncovering a significant VMS deposit here in the near future.

Project Details

The two McFaulds deposits are the centerpiece of an 80 claim property held 85% by Noront and 15% by KWG Resources.  Characterized as a volcanogenic massive sulphide (VMS) type occurrence, Noront is interested in further exploration of the claim group as VMS deposits often occur in numerous and sizeable clusters.

Project Status

Noront has reviewed the technical documentation and drill core for this acquired site and is now actively exploring by means of geophysical surveys and diamond drilling.

Current resources for the McFaulds deposits are presented in the Tables below.

McFaulds 3 Mineral Resource
Tonnage (tonnes) Grade (% Cu) Grade (% Zn)
Indicated Mineral Resources 802,000 3.75 1.1
McFaulds 1 Mineral Resource
Tonnage (tonnes) Grade (% Cu) Grade (% Zn)
Inferred Mineral Resources 279,000 2.13 0.58
A cut-off of 1.5% Cu was used. Please see the report titled “Updated Technical Report on the McFaulds Lake Project, Porcupine Mining Division, James Bay Lowland, Ontario, Canada” by Deep Search Exploration Technologies, dated August 30th, 2008 (the “Technical Report”) for details regarding the mineral resource estimates.
norontresourceMcFaulds Deposit