Acquisition: Etruscus purchased a 100% interest in the Rock & Roll Property, originally staked in 1988 on behalf of the Prime Resources Group, in early 2018.
Geology: The Rock & Roll Property is located in northwestern BC in the prolific Golden Triangle, 7 km from the historic Snip Mine. Geologically, it rests on the metal rich Stikine Island Arc Assemblage that has been accreted onto the western margin of North America and host to many of the major deposits in the area. The property’s main asset is the Black Dog Volcanogenic Massive Sulphide (VMS) deposit that has an updated NI 43-101 compliant inferred mineral resource. There is also the SRV Zone, located just south of the deposit.
Moving Forward: The Etruscus Team will be reinterpreting the geophysics, geochemistry and the structural framework of the Black Dog deposit to help find new mineral reserves extending along strike. There has been little drilling outside of the inferred resource and the geological team is excited to unlock the full potential of the Rock and Roll Property.
In August, 2018 a NI 43-101 compliant inferred resource at Rock and Roll was produced and estimates the resource to be: 2.02Mt of 2.63 g/t AuEq composed of 0.71 g/t Au, 87.1 g/t Ag, 0.23% Cu, 0.23% Pb and 0.98% Zn.
Location and Access
Etruscus’ wholly-owned Rock and Roll Property covers 21,955 hectares in the Iskut River Valley of northwestern British Columbia, 150 Km north of the ocean port at Stewart. The Property is situated within the Golden Triangle which has produced enormous precious and base metal wealth over the past century. This area also contains billions of dollars of undeveloped gold, silver, and copper.
Once seen as remote, British Columbia’s Golden Triangle has recently opened up dramatically, with two mines now in production, three new hydro-power facilities, a link to the provincial power grid and roads throughout the region. World-class deposits can finally be tapped because of infrastructure developments including:
- Completion of a $700 million high-voltage Northwest Transmission Line to the Golden Triangle, which runs 335 km from Terrace to Bob Quinn Lake, and north to the Red Chris mine. The power line to the region was critical in terms of project economics, bringing in electricity that is near the lowest cost in the world.
The Rock and Roll Property itself covers 39 contiguous MTO claims located at the base of the Iskut River Valley. The topography is relatively gentle compared to that of the surrounding peaks in the Coast Mountains Range with elevation on the Property varying from 60 to 350 m. The claim block is heavily forested and is covered by dense coastal vegetation of spruce, fir, and hemlock as well as heavy moss coverage. Snow levels during the winter are lower than on the surrounding mountains with the field season starting as early as April.
Access to the property is via helicopter from the Forest Kerr hydroelectric facility 28 km away. As of 2019 there has been a proposal by Seabridge Gold Corp. to put in a road to the Bronson Camp located 7 km away from the Rock and Roll property. The Bronson Camp is used by Skeena Resources in their exploration of the historic Snip mine as well as by Seabridge Gold in exploration of their Iskut property that contains the historic Johnny Mountain mine. The close proximity of this mining camp will allow faster at a lower cost for the Company's work on the Rock and Roll Property.
The Rock & Roll area has been explored intermittently since the late 1800’s by placer gold miners either en-route or leaving the Klondike gold fields near Dawson, Yukon. The property was originally staked in 1988 on behalf of the Prime Resources Group-one of Murray Pezim’s companies.
In 1990, exploration (line cutting, geochemical soil sampling, mapping, prospecting, ground geophysical surveys and trenching) led to the discovery of polymetallic, silver-gold-zinc-lead-copper massive sulphide mineralization that became known as the Black Dog Zone.
Notably, the surface expression of the Black Dog Zone is readily apparent in the geochemical soil sample and ground geophysical data.
In the period immediately following the discovery of the Black Dog Showing, Prime drilled 94 holes, totalling 11,063.2 metres in length, in the Black Dog and SRV zone area.
Subsequently, 20 holes totaling 3321.6 meters were drilled by several junior companies-mainly to expand the known mineralized zones. No work has been done on the property since it was returned the Vendors in 2009.
The Golden Triangle region of northwestern British Columbia is one of the most richly mineralized areas in the world. The gold endowment compares to that of Nevada’s Carlin Trend, generally recognized as the largest accumulation of gold in the Western Hemisphere. The tally of total gold ounces in the Golden Triangle only represents half of the contained metal value since the region also hosts an equivalent value in silver, copper, lead, zinc and other metals. Although the Golden Triangle is dominated by large porphyry copper-gold deposits, the region also hosts a variety of other deposit types. For example, Eskay Creek, a volcanogenic massive sulphide (VMS) deposit, produced 3 million ounces of gold and 160 million ounces of silver from ore with a spectacular grade of 49 g/t gold and 2,406 g/t silver. That deposit was so rich that Barrick transported the untreated ore to a smelter in the United States.
Rock and Roll
The Rock and Roll Property is located on the western margin of the Stikine Island-arc Terraneadjacent to the Coast Plutonic Intrusive Belt. Both Paleozoic and Mesozoic sedimentary and volcanic rocks make up a large portion of the Property area. These rocks have been intruded by Triassic intrusive porphyritic dykes as well as felsic Tertiary plutons of the Coast Mountain Complex. Within the Property the stratigraphy has been assigned to the Paleozoic Stikine Assemblage as well as the Mesozoic Stuhini Group rocks (Massey,2005). On the northern portion of the Property, Cenozoic mafic volcanic flows erupted from Hoodoo Mountain have resulted in large portions of the area being covered.
Local geology in this area consists of interlayered intermediate volcanic and argillite-siltstone units. The volcanic rocks are generally massive and fine to medium grained with no significant primary structures preserved. The argillite is commonly carbonaceous and contains rare, thin, pyritic lamina. Argillite-siltstone units are thinly bedded, grey to black, locally siliceous, and very deformed, commonly making identification of S0 or S1 difficult to impossible. Rare greywacke beds were tentatively identified. In general, the rocks are weakly to strongly iron carbonate altered with quartz-calcite and calcite stringers throughout. The volcanic and sedimentary rocks are also intruded by felsic dykes locally.
These Paleozoic and Mesozoic sedimentary and volcanic rocks are cut by intrusions of various ages. A series of north-south striking diorite dykes outcrop across the Property. These rocks are medium-grained and moderately strained. Within the mineralized stratigraphy around the Black Dog horizon, diorite is very common and is generally strongly sheared and brecciated with dark colouration due to contamination/remobilization of carbonaceous material. There are abundant feldspar crystals in the groundmass of this unit, occurring as laths and weakly glomeroporphyritic clusters. This diorite forms abundant narrow, strongly deformed and altered intervals within the sedimentary rocks, especially noticeable in proximity to the mineralized horizons.
RR91-037, 70-73 meter depth (3.02g/t Au, 260.1 g/t Ag, 5.91% Zn, 0.56%Pb, 1.13%Cu)
The basin shaped “Enhanced Precious Metal VMS Deposit” (EPM-VMS) at Black Dog consists primarily of pyrrhotite, pyrite, chalcopyrite and sphalerite. It is stratabound within a layer of exhalites and laminated mudstones. There are apparently two styles of mineralization associated with the Black Dog zone. Massive pyrrhotite with blebs and lenses of chalcopyrite and sphalerite forms the matrix to clasts of predominantly argillite with minor quartz, gypsum and diorite clasts mixed in locally. As well, massive pyrite-sphalerite forms finely laminated lenses locally, with minor pyrrhotite, galena and chalcopyrite. The Black Dog zone extends up to 650 metres to the southeast of the surface showing and similar mineralization occurs in at least three other horizons (or fold repeats) in the section. Diorite disrupts the mineralization and also hosts disseminated pyrrhotite-chalcopyrite mineralization along the length of the deposit. The geophysical features indicate that the Black Dog stratigraphy continues northward to the other side of the Iskut River. No significant mineralization was observed north of the Iskut River other than the pyritic laminations in carbonaceous argillite. Two samples of carbonaceous argillite with thin pyritic laminations and pyrite in fractures returned slightly elevated values for silver, copper, zinc and antimony. In August, 2018 the NI 43-101 compliant inferred resources at Rock and Roll were estimated to be:
Rock and Roll Inferred Mineral Resource Estimate, August 3rd 2018
(Cut-off Grade 0.5 g/t AuEq) A. Armitage.
|Au (g/t)||Ag (g/t)||Cu (%)||Pb (%)||Zn (%)|
- Fixed specific gravity value of 3.07 was used to estimate the tonnage from block model volumes.
- Mineral resources are reported at a base case cut-off grade of 0.5 g/t AuEq considering metal prices of $1,250.00/oz Au, $17.00/oz Ag, $3.00/lb Cu, $1.00/lbPb and $1.20/lb Zn, and assuming metal recoveries of 95% for zinc, 80% for lead, 90% for copper, 85% for silver and 80% for gold or 85% for AuEq. Metalurgical recoveries will be adjusted with future metallurgical testing. AuEq = (Au g/t * 0.8) + (Ag g/t * 0.012) + (Cu% * 1.48) + (Pb% * 0.44) + (Zn% * 0.63).
- Mineral resources which are not mineral reserves do not have demonstrated economic viability. All figures are rounded to reflect the relative accuracy of the estimate.
Volcanogenic Massive Sulfide Model
The Rock and Roll Property belongs in the volcanogenic massive sulphide (VMS) class of ore deposits. They are an important resource in British Columbia both for base and precious metals. Current exploration interest is focused largely on the precious metal-rich Eskay-type deposits which are attractive because of their polymetallic nature and bonanza grades (e.g. Eskay Creek – 1998 reserves 1,356,240t at 2684 g/t Ag, 58 g/t Au).
Volcanogenic massive sulfide (VMS) ore deposits are a type of metal sulfide ore deposit, mainly copper-zinc, which are associated with and created by volcanic-associated hydrothermal events in submarine environments. They occur within environments dominated by volcanic or volcanic rocks, and the deposits are coeval and coincident with the formation of said volcanic rocks. As a class, they represent a significant source of the world’s copper, zinc, lead, gold and silver ores,with cobalt, tin, barium, sulfur, selenium, manganese, cadmium, indium, bismuth, tellurium, gallium and germanium as co- or by-products.
The VMS ore deposits typically comprise one or more thin sheets of massive to well layered pyrite, sphalerite, galena and chalcopyrite commonly within felsic volcanic rocks and interlayered, terrigenous clastic rocks with calcalkaline basaltic to andesitic tuffs and flows. The lenses may be zoned, with a Cu-rich base and a Pb-Zn-rich top; low-grade stockwork zones commonly underlie lenses and barite or chert layers may overlie them.
A hundred years of exploitation from 16 major VMS mines in BC has produced nearly 109,000,000 t of ore. This has resulted in the production of over 3,000,000 kg Ag, 82,500 kg Au, 1,460,000 t Cu, 96,400 t Pb, 1,000,000 t Zn and 2,000 t Cd. The bulk of this production has come from five mines – Britannia, Anyox (Hidden Creek), Myra Falls and Granduc, and Eskay Creek. Tulsequah Chief has received mine certification. Their average deposit size is 1.5 Mt containing 1.3% Cu, 1.9 % Pb, 2.0 % Zn, 0.16 g/t Au and 13 g/T Ag. British Columbia deposits range from less than 1 to 2 Mt to more than 10 Mt. In British Columbia, most deposits are Cambrian, Late Triassic and, less commonly, Mississippian-Permian in age. They are highly variable in size. B.C. deposits range in size from less than 1 Mt to more than 113 Mt.
Volcanogenic Massive Sulfide Model
(Examples of each deposit are presented solely for comparative purposes and are not intended to characterize
the mineralization at the Rock and Roll Property)
Windy Craggy has reserves in excess of 113.0 Mt containing 1.9 % Cu, 3.9 g/t Ag and 0.08% Co.
Britannia: Between 1905 and 1977, the Britannia orebodies yielded approximately 47.8 million tonnes of ore grading 1.1% copper, 0.65 % zinc, 6.8 grams per tonne silver and 0.6 grams per tonne gold.
Myra Falls: The overall pre-mining mineral resource (all categories) was 40 M tonnes grading 2.1 g/t Au, 49.0 g/t Ag, 1.8% Cu, 0.5% Pb, and 6.1% Zn
Granduc reported reserves before production of 39,316,435 tonnes grading 1.73 per cent copper
Goldstream has a total resource (reserves and production) of 1.8 Mt containing 4.81 % Cu, 3.08 % Zn and 20.6 g/t Ag and
Kutcho Creek: Probable Mineral Reserve (2017 estimate) of 10.4 Mt @ 2.01% Cu, 3.19% Zn, 34.61 g/t Ag and 0.37 g/t Au
Tulsequah Chief: An NI 43-101 compliant probable mineral reserve estimate is given at 6,447,098 tonnes grading 1.13 per cent copper, 1.04 per cent lead, 5.59 per cent zinc, 2.30 grams per tonne gold and 81 grams per tonne silver
2019 Field and Drill Program
In 2019 Etruscus conducted Phase 1 field program consisting of a biogeochemical orientation survey to test the effectiveness of biogeochemical (bark) sampling to identify elevated pathfinder elements (Au, Ag, Ba, Cu, Fe, Hg, Pb, Se, Zn) in areas with thick overburden where traditional soil sampling is ineffective. The biogeochemical survey provided valuable results to prioritize historical geophysical targets for Phase 3 drill testing planned for later in the season. A total of 58 bark samples were collected, including duplicates. The distribution of sampling was designed to test over known mineralized and barren areas surrounding the Black Dog deposit. The sampling was broken down to 17 samples across the exposed massive sulphide deposit, 19 samples across a projection of the favorable stratigraphy (1.2 km south of the exposed massive sulphide), and 22 samples in a remote area 1.7 km northwest of the exposed massive sulphide.
A Phase 2 12-day follow-up biogeochemical sampling program was conducted. The 5-person exploration team collected samples across a 27 km2 area, covering all projections of favorable stratigraphy. The exploration team also focused on a structural mapping program. Both programs helped assist the Etruscus team in prioritizing the geophysical anomalies for drill testing that have been identified from detailed historic data analysis work.
The 2019 drill program is currently underway.