Long Lake
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The 100%-owned Long Lake Critical Mineral property is located in Central Newfoundland, approximately 100 kilometres southwest of Grand Falls-Windsor (pop. 15,000) and 50 kilometres south-southwest of Buchans (pop. 600). The property hosts the Long Lake Main Zone Cu-Pb-Zn-Ag-Au volcanogenic massive sulphide (VMS) deposit. Numerous VMS prospects and occurrences remain underexplored on the property.
Property Highlights:
- Large land package covering 4,013 hectares (40 square kilometres)
- Excellent road access and nearby infrastructure (power, workforce, services).
- Significant critical mineral zinc-lead-copper-silver-gold volcanogenic massive sulphide (VMS) mineralization has been discovered on the property including the Long Lake Main Zone Deposit
- Numerous, underexplored base metal occurrences are located along strike of the Main Zone deposit including East/South Limb, Lucky Gnome, and West Grid prospects.
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The property area is easily accessible by logging/mining roads originating from the paved highway at Buchans or Millertown. Secondary logging roads and logging trails provide access to various parts of the property, including truck access to the Long Lake deposit. The property is located approximately 40 kilometres west of Teck Resources Ltd’s closed (June 2015) Duck Pond Cu-Zn mine and 15km NE of Marathon Gold's in construction Valentine Lake Gold Mine.
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Property Geology
The Long Lake property is underlain by rocks of the Long Lake Volcanic Belt of the Victoria Lake Supergroup. The Victoria Lake Supergroup consists of a structurally complex, bimodal Neoproterozoic to Ordovician arc-related magmatic and sedimentary rocks. The Victoria Lake Supergroup hosts numerous base metal-bearing VMS deposits, showings and extensive alteration zones, and several gold deposits and showings. This mineralization is distributed throughout all of the lithotectonic assemblages, including the Long Lake Volcanic Belt, that comprise the supergroup. The Long Lake Volcanic Belt consists of Cambrian-aged (ca. 506 to 511 Ma) bi-modal volcanic, volcaniclastic and sedimentary rocks.
The Long Lake Volcanic Belt is an extensive northeast trending belt of felsic and mafic pyroclastic rocks and flows, mafic dykes, intercalated sediments, and sub-volcanic intrusions metamorphosed to greenschist facies. Prospective felsic volcanic rocks extend the 40 km length of the volcanic belt and contain zones of volcanogenic alteration associated with massive sulphide formation. Along the northwest margin is a major fault, marked by an extensive magnetic gradient anomaly, which separates the Long Lake Belt from the Tulks Hill volcanic belt. The southeast side of the Long Lake Belt is marked by the regionally extensive graphitic shale-argillite horizon of the underlying Tally Pond volcanic belt.
The Long Lake volcanic rocks typically feature a strong, northeast-striking, steeply northwest dipping foliation. There is evidence of tight isoclinal folding with a wavelength of approximately 300 metres and amplitude in excess of 800 metres, but lithological changes across strike suggest that structural repetition is subordinate to stratigraphic change.
Mineralization
Mineralization at the Long Lake Deposit consists of several relatively narrow (<6 metres) lenses of base and precious metal-rich massive sulphide (sphalerite, galena, chalcopyrite, silver and gold) mineralization and associated massive barite and underlying footwall stringer mineralization. The zones of mineralization intersected to date are hosted within limb domains of local scale isoclinal fold structures and it is interpreted that the massive sulphide lenses have been attenuated during post-mineral deformation. A total of 46 drillholes (12,862 metres) have been completed on the Long Lake Main Zone deposit.
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Category
Tonnes
Au (g/t)
Ag (g/t)
Zn (%)
Pb (%)
Cu (%)
ZnEq (%)
Long Lake(1)
Indicated
407,000
0.57
49.00
7.82
1.58
0.97
12.41
Inferred
78,000
0.48
34.00
5.77
1.24
0.70
9.15
(1)Based on a 7.0% ZnEq Cutoff from the technical report entitled “Independent Technical Report for the Main Zone of the Long Lake Volcanic Massive Sulphide Project, Newfoundland and Labrador, Canada” prepared for Messina Minerals Inc., Report Date: April 16, 2012, Effective Date: March 13, 2012, as prepared by SRK Consulting (Canada) Inc. All figures have been rounded to reflect the relative accuracy of the estimates.