Long Lake

Download the Technical Report (2012)
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Introduction:

Newfoundland

The 100%-owned Long Lake 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.

The property area is 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 recently closed (June 2015) Duck Pond Cu-Zn mine.

Property Highlights:

  • Large land package covering 10,400 hectares (104 square kilometres)
  • Excellent road access and nearby infrastructure (power, workforce, services).
  • Significant 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. 

Property Resources: 

Deposit  Category  Tonnes Zinc (%) Lead (%) Copper (%) Silver (g/t) Gold (g/t) Cut-off
Main Zone Indicated 407,000 7.82 1.58 0.97 49.0 0.57 7.0% ZnEq
Inferred 78,000 5.77 1.24 0.70 34.0 0.48 7.0% ZnEq

Ownership:

Canadian Zinc Corporation owns a 100% interest in the Long Lake property, subject to a 2% Net Smelter Royalty (“NSR”) held by Glencore-Xstrata (formerly Noranda).  Glencore-Xstrata retains the right to purchase up to 100% of all mineral concentrates produced from the property. The property consists of one map staked mineral license and one mineral concession (Reid Lot 229) covering a total of 10,400 hectares.

Exploration History:

Hill-Top008 thumbThe Long Lake VMS deposit area has been explored intermittently since 1947 for precious metal-rich polymetallic volcanogenic massive sulphide deposits. The bulk of the historic exploration work in the area was completed by BP Resource Canada Ltd and Noranda Exploration Co. Ltd. and its various partners between 1985 and 1998.  The work culminated in the discovery of the Long Lake Main Zone Deposit by Noranda in 1994.  During this period numerous other base metal VMS prospects were discovered in the immediate vicinity and throughout the belt (e.g. Long Lake East, South Limb).  

Messina Minerals Inc. acquired the property in 2004 and has completed successive drilling programs resulting in the definition of a National Instrument 43-101 Resource estimate in 2012.   To date, a total of 92 drillholes for 24,168.7 metres have been completed on the property.

Canadian Zinc acquired Messina Minerals in December 2013.

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.

Hill-Top004 thumbThe 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.

Long Lake “Main Zone” Deposit:

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.

Maps and Sections

Region Plan Map
Long Lake Property Location Map (PDF)
 
Long Lake Geology Plan Map
Long Lake Deposit Geology Plan Map (PDF)
 

Long Lake Long Section
Long Lake Long Section (PDF)