Indy Sedex Project, British Columbia

InZinc Mining Ltd. has an option to earn a 100% interest in the Indy Sedex project in central British Columbia. The Indy project is located 90km southeast of the city of Prince George.


InZinc’s maiden drill program in 2018 was the first exploration program to successfully identify Sedex - type mineralization in this area of North America, opening the potential for a new Sedex district in an accessible, unexplored area of central British Columbia.

High-grade, shallow mineralization was announced in the first drill program (B-9 Discovery) in late 2018. At 50m below surface, discovery hole IB18-009 intersected 15.3% (Zn+Pb) and 24.5 g/t silver over 6.3m, including 46.6% (Zn+Pb) and 45.8 g/t silver over 0.5m.(HQ Core)

Indy was acquired by option agreement (100% earn-in) in 2017.The Indy project consists of 16 mineral claims spanning over a 25km trend comprised of under explored mineral showings and large zinc-in-soil anomalies within rocks with a known affinity for hosting large zinc deposits. The underlying sedimentary rocks are correlated by the Geological Survey of Canada to rock sequences of the remote Selwyn Basin of northern British Columbia and the Yukon, host to the largest undeveloped Sedex (zinc) resources in the world.


Only about 129 known Sedex deposits in 25 unique sedimentary belts are known globally (USGS, 2012). Many of these are challenged by remoteness or political insecurity.

The best-known Canadian Sedex deposit is the Sullivan deposit in southeastern British Columbia, which until 1992 produced over $20 billion in zinc, silver and other metals.

Known to form in clusters or districts and only within unique sedimentary sequences of certain ages, Sedex deposits collectively comprise the largest deposits, reserves and zinc production on the planet. Accordingly, Sedex deposits are highly sought by base metal producers for their predictable grade, large resources and district potential.

Indy Sedex Discoveries Nov 2019


Unlike precious metals, base metal economics are very sensitive to location. Proximity to road, rail, power and ports are a key to low-cost discoveries and successful production.

The Indy Sedex project is located 90km southeast of the city of Prince George, British Columbia, the major hub for transportation and heavy industry in central British Columbia.

Indy is about 1.5 hrs drive via paved and multi-season forestry roads from Prince George. The intercontinental Canadian National Railway (CNR) servicing the Port of Prince Rupert and connecting to the Port of Vancouver is located 85 km by road to the north of the property. Hydro-electric transmission lines are located within 40km of the property.

Indy Western Image 3

Recent improvements supporting forestry activities have substantially improved logistics and access to the property.

Indy Western Image 4

A 50 person camp was constructed Spring 2019 – located 10km by road from the B-9 Discovery area. Road improvements are also supporting cost-effective ground-based exploration.


Regional and Property Geology - An Ideal Setting for Sedex Deposits

The Indy property straddles the divide between two continental scale geological terranes. To the west are rocks of the Slide Mountain group, an ancient seafloor formed off the western edge of ancient North America in the Devonian period. To the east, the older rocks of the Cariboo Group consist of displaced, ancient North American rocks and include ancient (Cambrian) limestone reefs and older shale sequences correlated to portions of the Rocky Mountains.

Between these two rock groups, underlying the bulk of the project, are the sedimentary sequences of the Black Stuart Group. Comprised of black pelites, limestones, dolomitic sequences and unique sedimentary breccias, these are the rocks correlated to the prolific Sedex bearing Selwyn Basin (Earn and Road River formations) in northern British Columbia and the Yukon (GSC, 1988). They also host the mineralization discovered in 2018 at the B-9 Zone at Indy. The rocks of the Black Stuart Group are called rift-basin sequences and likely signify once active continental scale faulting along the western edge of ancient North America during the Ordovician to Mississippian periods – an ideal geological setting for Sedex deposit formation.

More recent glacial activity produced a thick valley fill and thinner valley edge cover which is extensive in the area. Surface outcrop exposures are limited.

The property is host to numerous unexplored zinc and barite occurrences. Some are comprised of secondary zinc oxides (formed near surface from the weathering of primary deposits) and as such, useful as indicators of possible primary deposits nearby. Barite is also a well-known proximal indicator of Sedex deposits.

Indy Sedex Model Nov 2019

Zinc oxides (45% zinc in selected sample) were identified in 2012. This occurrence is located at surface and is an indicator of the subsurface zinc sulphide mineralization present at the B-9 Discovery.


Sedex deposits are associated with distinctive geochemical signatures or pathfinders. These have been identified by extensive soil sampling in several, potentially stacked, horizons over the 7 km long “Main Trend” at Indy. The aggregate length of untested geochemical targets on the project now exceeds 5 km.

Anomalies B, C and D are comparable or exceed the surface projection length of most known Canadian Sedex deposits. The Action anomaly, located at the north part of the project, was acquired by staking in 2018. Collectively, these anomalies represent the largest known, untested zinc-in-soil anomalies in Canada. In late 2018, maiden drilling at a small (250m long) portion of anomaly B intersected strong mineralization at the B-9 Discovery zone.

Indy 2019 Exploration

Extensive soil geochemical surveys (1,194 soils), mapping and prospecting programs were completed in 2019 resulting in a large, new Sedex target called the Delta Horizon.

Large Untested Exploration Targets

  • Delta Horizon: 659 B-horizon soil samples outline a new 1.5 km long high contrast, multi-element geochemical anomaly defined by distinctive Sedex pathfinder elements and rock exposures.
  • Anomaly B: 379 soil samples extended and defined the geochemical trends associated with the 2018 Sedex discovery area (B-9 Zone). Multiple, parallel Sedex style trends are now defined with an aggregate length of 2 km of which 90% remains untested by drilling.
  • Anomaly C: expanded in 2019, this high contrast untested geochemical anomaly is 750 m in length.
  • Action Zone Reconnaissance: a 750 m length high contrast geochemical anomaly, untested and open for expansion.
  • Over 4000 soil geochemical samples: including data from previous operators and InZinc sampling.

Indy 2019 Compilation

Cost-effective Exploration Tools

Soil geochemistry (combined with prospecting and geological mapping) is the primary exploration tool at Indy due to low amounts of rock exposure. Soil geochemistry is a proven, cost-effective tool for deposit identification in British Columbia having discovered 11 deposits, of which 8 are producers.


The first drill program (1271m – 11 holes) by InZinc in 2018 discovered strong mineralization at less than 60m depth over a 250m long area at Anomaly B. Termed “blind”, the mineralization was detected by soil geochemistry in an area of no surface outcrop. Named the B-9 Discovery zone, it remains open for expansion (see below) in all directions.

Highlighted drill results from 2018 include:

IB18-009:     12.33% Zn, 2.98% Pb, 24.5 g/t Ag over 6.29m (50m below surface)
IB18-008:     5.76% Zn, 0.60% Pb, 4.0 g/t Ag over 6.73m (57m below surface)
IB18-002:     4.49% Zn, 1.13% Pb, 7.32 g/t Ag over 4.28m (27m below surface)
  and 2.24% Zn, 0.83% Pb, 5.23 g/t Ag over 5.38m (33m below surface)
  and 3.50% Zn, 0.66% Pb, 4.59 g/t Ag over 4.57m (37m below surface)
IB18-003:     9.26% Zn, 2.43% Pb, 17.98 g/t Ag over 3.05m (23m below surface)
IB18-006:     3.88% Zn, 1.34% Pb, 8.90 g/t Ag over 3.99m (29m below surface)
Note: True widths are unknown. The intersections in IB18-002 are separated by lost core/no recovery.

In addition to intersections of shallow mineralization, the drilling at the B-9 Discovery also intersected important geological features which are exclusive to Sedex deposits. These include rock alteration (sericite, ankerite), certain rock types (sedimentary breccias) and the tenor of the mineralization itself, which are similar to occurrences at large Sedex deposits.