InZinc Mining announces key correlations to one of the world's most productive zinc-lead-silver belts, the Selwyn Basin, at the Indy Project in central BC


Vancouver, British Columbia – (Newsfile Corp. – May 16, 2024) – InZinc Mining Ltd. (TSXV:IZN) (“InZinc” or the “Company”) announces that key stratigraphic units supporting connections to the prolific, metal-rich Selwyn Basin have been completed at 90% on the Indy Project (100% interest) (“Indy” or the “Project”) were identified km southeast of Prince George, British Columbia, Canada. Previously, these key units known to host the Selwyn Basin deposits extended only from the Yukon to northeastern British Columbia (see Figure 1).

The Selwyn Basin, a 1100 km long sedimentary belt, is home to the second largest known accumulation in the world1 of Sedex deposits and districts (zinc-lead-silver) and includes several world-class deposits (see Table 1).

New correlations of geology, fossil assemblages, mineralization and previous discoveries support the presence of a “piece” of the Selwyn Basin near Indy.

Table 1: Sedex districts and deposits of the Selwyn Basin, Canada

Sedex deposit/district Historical and current estimates (Mt – million tons)
Anvil District, Yukon 120 Mt at 5.6% zinc, 3.7% lead and 45 to 50 g/t silver2
Howard's Pass District, Yukon 400 Mt with 5% zinc and 2% lead3
Mac Pass District, Yukon 11.2 million t Indicated at 6.6% zinc, 2.5% lead and 21.3 g/t silver4
39.5 million tonnes derived at 5.8% zinc, 3.1% lead and 38.2 g/t silver4
Cirque, Northeast BC 40 Mt at 7.8% zinc, 2.2% lead and 48 g/t silver5
Akie, Northeast BC 22.7 million t Indicated at 8.3% zinc, 1.6% lead and 14.1 g/t silver6
7.5 million tonnes derived at 7.0% zinc, 1.2% lead and 12.0 g/t silver6

A Selwyn “Slice” in Indy

The following discoveries in Indy provide evidence of the presence of the Selwyn “disk”:

  • New correlations of the age of mineralization and associated shales with the known mineralization sequences in the Sedex deposits of the Selwyn Basin.
  • Extensive barite mineralization with zinc-lead enrichment was recently discovered at Keel (700 m strike – open).
  • Sedex-style mineralization defined on the B-9 trend (450 m strike – open).
  • Identification of a potential second-order shale basin typical of Sedex areas worldwide.
  • Numerous, untested geochemical anomalies on the largely unexplored 30 km long property.

“It has been an exciting few months as the discovery of barite at Keel has continued to develop and correlations have been made with the Selwyn Basin and its vast metal deposits. “We believe Indy provides an exceptional opportunity to explore the well-known and productive Selwyn sequences in northern Canada – for new Sedex deposits in central BC,” noted Kerry Curtis, geologist and chairman of InZinc.

Wayne Hubert, CEO of InZinc, added: “These are remarkable advances for exploration in Indy. A potential Sedex discovery or district, just an hour and a half drive from the city of Prince George, could provide competitive domestic smelter feed, sustainable metal production, etc. new economic growth opportunities for BC.”

Junior Mining NetworkFigure 1: Western Canadian Sedex (zinc-lead-silver) deposits in the Selwyn Basin

Junior Mining NetworkFigure 2: Indy Project – Key Trend Targets

Geology – Correlations between Indy and the Selwyn Basin

It is well documented that Devonian and Ordovician sedimentary rocks are productive sequences for Sedex-type (zinc-lead-silver-barite) deposits in the Selwyn Basin. Both ages of stratigraphy are present in Indy.

  • Middle to Late Devonian macrofossils have been identified in shales associated with barite-sulfide mineralization. They correlate closely with the Middle to Late Devonian macrofossils present in the mineralized shales (Gunsteel Formation) that host the Cirque and Akie Sedex (barite sulfide) deposits 500 km to the north (see Figure 1).
  • Additionally, the geologic setting at Indy, consisting of debris flows and shales deposited on the edge of a potential second-order basin, is remarkably similar to the Gunsteel Formation mineralized basin sequences at the Cirque Sedex deposit.
  • More broadly, the Devonian sediments of the Earn Formation that host the Mac Pass Sedex deposits in the Selwyn Basin of Yukon also correlate with those in Indy.
  • Age determinations are also confirmed by microfossils (conodonts) identified by the GSC as Devonian in age7 in 1988 – before the discovery of barite sulfide mineralization.
  • A lower shale unit also present in Indy has been dated by the GSC7 from the Ordovician (equivalent to the Road River Formation – Howard's Pass Sedex District) and provides another potential target sequence for Sedex exploration.

Funded exploration program

Geological mapping and targeted soil geochemistry based on new Selwyn Basin correlations are planned for June-July 2024. InZinc is currently extending its drilling permit for a period of five years.

Change in Board Membership – Mr. John Murphy

John Murphy, a member of the Board of Directors, will not seek re-election at the Company's upcoming annual meeting of shareholders on May 31, 2024. Mr. Murphy was appointed to the Board in June 2016. John provided valuable insight, perspective and knowledge over the past eight years. The board and management wish John every success in his future endeavors.

1 Emsbo, P., US Geological Survey, Open-File Report 2009-1209. Geological criteria for the evaluation of sedimentary exhalative (Sedex) Zn-Pb-Ag deposits.
2 Emsbo, P., US Geological Survey, In SEG Reviews, Vol. 13, 2000, pp. 427-437.
3 Goodfellow, WD, Lydon JW and Turner RJW, 1993. Geology and genesis of stratiform sediment-hosted (SEDEX) zinc-lead-silver sulfide deposits; In Mineral Deposit Modeling, (eds.) RV Kirkham, WD Sinclair, RI Thorpe and JM Duke; Geological Association of Canada: Special Paper 40, p. 201-251.
4 Fireweed Metals, website.
5 Don G. MacIntyre, Ph.D., P.Eng, BCGS 1998. Geology, geochemistry and mineral deposits of the Akie River area of ​​northeastern British Columbia.
6 ZincX Resources, website.
7 Struik, L.C., (1988). Structural Geology of the Cariboo Mining District East-Central British Columbia. GSC Memoirs 421.

About InZinc

InZinc is an active explorer and has a diverse portfolio of active North American base metals and precious metals projects through its Indy Project, equity interests and royalty interests. The Company has discovered and continues to explore the expansion of near-surface zinc mineralization at the easily accessible Indy Project in a new and underexplored mineral region in central British Columbia, Canada. A Canadian subsidiary of South32 (ASX, LSE, JSE) became a major holding in the belt by staking approximately 200km2 of the adjacent claims in late 2021. InZinc has a significant equity interest in American West Metals (ASX), which is advancing several North American base metals projects. In addition, InZinc has a production royalty and receives 50% of revenue (NSR) from sales of indium produced at American West's West Desert Project.

InZinc Mining Ltd.

Wayne Hubert


Managing Director
Phone: 604.687.7211

For further information contact:
Joyce Musical
Vice President, Corporate Affairs
Phone: 604.317.2728
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Qualified person

Brian McGrath, B.Sc., P.Geo. a qualified person as defined by National Instrument 43-101 – Mineral Project Disclosure Standardshas approved the technical content of this press release.

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