Location: 398294 E, 6270204 N (Thunder North) - 399028 E, 6266922 N (Thunder S)

Mineral Deposit Type: Magmatic Ni-Cu Sulphide

Commodity: Nickel, Copper, Cobalt, PGE

Size: 3 x 2 Km

Exploration Completed: WV3 Remote Sensing, Mapping, Sampling, VTEM Surveys and Drilling (630m)

Planned Work: Mapping, Sampling, Trenching and Drilling

Thunder North

The Thunder North prospect is comprised of a cluster of VTEM magnetic and conductive anomalies within an area of 3 x 2km of mafic volcanic and sedimentary rocks of Hazelton formation immediately south of Garibaldi’s Nickel Mountain project. Following the discovery of massive Ni-Cu sulphides at E&L, Metallis Resources carried out a rapid surface exploration program and discovered a 150 x 200m wide intrusive body composed of gabbroic rocks. Although these gabbros do not have more than 7.5 wt.% MgO, they are comparable to the finer-grained gabbros of the Nickel Mountain Gabbro Complex and there is a possibility that more melanocratic variable-textured and orbicular types of gabbro are developed in association with these rocks.The gabbroic rocks are present in outcrop at the southwestern end of the Texas Creek Intrusive Complex, and they occur as fragments in young magnetic-rich volcanic rocks.

2018 Exploration and Drilling Program

The 2018 summer program included a detailed (83.3m line-spacing)high-resolution VTEM survey, which identified a cluster of 25 conductive targets on the scale of E&L that are coincident with positive total field magnetic anomalies. The initial drill testing of two of the anomalies revealed a sequence of andesite and strongly magnetic olivine basalts overlain by Neogene volcanics reflecting the presence of an extensive hidden mafic volcanic complex. The field program of follow-up work was designed to search for chaotic textured / brecciated olivine gabbros in the footprints of the coincident VTEM and magnetic anomalies.

In late 2018, Metallis acquired a state of the art Worldview 3 satellite image to help understand the geology of the Kirkham Project and specifically evaluate the spectral and lineament response of gabbroic rocks. During the surface follow-up program on the conductive VTEM anomalies, Metallis’s technical team, led by Dr. Peter Lightfoot, identified a variety of gabbro and olivine gabbro floats in the Fewright, King and Harrymel creeks which indicate that intrusions of gabbro and olivine gabbro may be more widely distributed in the Eskay Rift than previously thought.

Variations in the compositions of the boulders from different creek drainage systems as well as gabbroic rocks from the southwestern end of the Texas Creek Intrusive Complex are shown in Table 1. Two highly mafic samples of olivine gabbro returned greater than 25% MgO, but actually show Ni, Cu and Co depletion this suggests that metals have been stripped off and precipitated elsewhere in the system. The outcropping gabbros southwest of the Texas Creek Intrusive Complex collectively have 3-10 wt.% MgO, but so far the collected samples do not show enrichment of magmatic sulfides (Fig. 2).

Exploration Potential

Exploration work completed at Nickel Mountain illustrates that disseminated and massive Ni-Cu-Co-Ag-Au-PGE sulfide mineralization is associated with taxitic and orbicular-textured olivine gabbros of the Nickel Mountain Gabbro Complex (Garibaldi Resources, NR Feb 19, 2019). This intrusion is within the Hazelton Group sedimentary rocks on the western flank of the Eskay Rift. This segment of the rift has seen minimal historic exploration for nickel sulphide mineralization, therefore the discovery of new mafic intrusions represents a significant step in understanding the exploration potential for magmatic sulfide mineralization. The trans-tensional structural architecture of the western margin of the Eskay Rift is a key control on the emplacement of small open system intrusions as in Nickel Mountain. The differentiated mafic intrusions with chaotic textures and breccias are recognized as an important feature of nickel sulphide ore deposits. Metallis continues to explore these types of rocks and their manifestations using its high-resolution VTEM and geochemical surveys.
Thunder North - Geological Model for Nickel Sulfide Target