Willoughby is a high grade Au-Ag prospect with characteristics of the intrusion-related ore deposit model and some similarities to both the nearby Red Mountain deposit (1,641,600 Mt @ 8.36 g Au/t, 26 g Ag/t Measured & Indicated, Arseneau, 20161); and to the historic Silbak-Premier Gold Mine (produced 56,000 kg Au (1.8Moz), 1,281,400 kg Ag (41.2Moz), 1918-1976).
1Arseneau, G., 2017, Mineral Resource Update for the Red Mountain Gold Project, Northwestern BC, Canada; for IDM Mining Ltd., p. 128.
The Willoughby property is located in northwest British Columbia’s mineral-rich Golden Triangle, Skeena Mining Division of British Columbia, about 26 km east of the Town of Stewart. The Red Mountain Au-Ag deposit being developed by IDM Mining is located about 7 km to the west across the Cambria Icefield. Highway 37A and the Stewart power line are located about 14 km to the north.
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Two Mineral Tenures comprising ~995 hectares are owned 100% by Millrock. The Tenures are in good standing to at least August 11, 2019. The tenures are under option to Sojourn Ventures Inc. (TSX.V: SOJ “Sojourn”).
The Willoughby Property is largely underlain by northwest trending, variably dipping Lower Jurassic Hazelton Group pyroclastic rocks and subordinate clastic sedimentary rocks and limestone. Locally the Hazelton Group rocks have been intruded by Early to Middle Jurassic aged Goldslide hornblende-feldspar monzodiorite to granodiorite intrusions similar to that at Red Mountain. At the Willoughby Nunatak extensive zones of hydrothermal alteration consisting of variable iron carbonate +/- sericite +/- chlorite +/- pyrite overprint both the stock and country rocks with hornblende altered to biotite and/or sericite. Within these altered zones two types of gold +/- silver bearing sulphide mineralization have been identified: 1) shear hosted pyrite +/- sphalerite +/- galena quarts veined zones ranging in width to 6 metres and in length to 150 metres hosted within hornblende feldspar porphyry and andesitic tuffs; and 2) semi massive to massive sulphide bearing lenses of pyrite +/- pyrrhotite, ranging in width to 8 metres and in length to 100 metres, hosted within andesitic tuffs.
The Willoughby Property has a long exploration history including two phases of diamond drilling between 1989 and 1996, focused on four distinct zones. Drilling highlights from the 74 surface holes totaling 8,180.8 metres and 30 underground holes totaling 2,383.2 metres (Visagie, 2017(*2*)) include:
Very little exploration work has been conducted since 1996. During the intervening decades, glacial ice in the area has retreated significantly. There is potential to find new mineralized zones in outcrops that were previously ice covered.
*2*. Visagie, D, 2017, 43-101 Independent Technical Report on the Willoughby Property, for Sojourn Ventures Ltd., p. 103.
Considering the favourable similarities of Willoughby to nearby Red Mountain deposit, and positive drill results and airborne geophysics targets, additional work is required to evaluate the Willoughby Property. The proposed two-staged program would entail first integrating all historic data to compose a 3D model of the property with drill sections to further define mineralization trends. Further processing historic AeroTEM results will better delineate structural controls and EM signatures of the mineralization, and is recommended. The first step of the field program will be to prospect the edges of the alpine glaciers. Detailed mapping of drill target areas will facilitate prioritization of drill targets. The second stage of exploration would be drilling to follow-up on the results of the previous drill programs completed on the property, such as testing strike and down dip extension of the best zones, and initial drilling of additional targets identified in Stage 1.
Millrock currently has an option agreement on the Willoughby project with Sojourn Ventures Inc., (TSX-V: SOJ), which may purchase a 100% interest (subject to a royalty provision) by issuing Sojourn shares. There are certain milestone payments that will be due to an individual from whom Millrock originally purchased the tenures.
THE TECHNICAL INFORMATION WITHIN THIS DOCUMENT HAS BEEN REVIEWED AND APPROVED BY GREGORY A. BEISCHER, PRESIDENT & CEO OF MILLROCK RESOURCES INC. MR. BEISCHER IS A QUALIFIED PERSON AS DEFINED IN NI 43-101.
THE INFORMATION IN THIS SUMMARY HAS BEEN DERIVED FROM A NI-43-101 REPORT THAT WAS PREPARED BY SOJOURN AND HAS BEEN SUBMITTED TO THE TSX-V. A COPY OF THE REPORT CAN BE FOUND AT THIS LINK.