Raleigh Lake Project
ILC has systematically expanded its land tenure at Raleigh Lake from 3,000 to over 47,700 hectares (477 square kilometres) of mineral claims. The flagship project, located near Ignace, Ontario was expanded based on continuing studies of structural domains, and geological interpretations surrounding the original Raleigh Lake project. The project is 100% owned with no underlying royalties. The project is adjacent to excellent infrastructure that includes sealed roads, active rail lines, and 230kv powerlines that are within the property boundary and within 5km of the most explored area of the project to date. It is in close proximity to populous towns and other mining and exploration projects providing access to a skilled labour force and excellent mining-related services and easy access to the port city of Thunder Bay on Lake Superior.
ILC commenced drilling in March 2021 following encouraging aerial magnetometer drone surveys carried out on the initial 3,000 hectares of claims. The inaugural drilling program identified useful appreciable amounts of lithium but also attractive amounts of rubidium and to a lesser extent, caesium. The market price for rubidium compounds is approximately 75 times higher per kilogram than that of lithium compounds which adds considerable financial and economic benefits to the projects.
The 2021 drilling results supported our geological understanding of the entire project area instilling confidence in the exploration model and leading to the decision to increase our claim holdings to 47,700 hectares. The remaining season of 2021 and much of 2022 will see further ground surveys, drilling, chemical analyses, and financial analysis to establish the full scale and economics of the mineral potential for the entire 47,700 hectares. We will release information on the project progressively as received rather than waiting for full results from all 47,700 hectares.
The project area is located within a 25 kilometre radius of Ignace and 235 kilometres west of Thunder Bay, ON. It is easily accessed by a well-maintained network of logging roads that branch south from Highway 17 (Trans-Canada Highway).
Key Pegmatite Project Locations
The Raleigh project is ideally located on the Trans Canada Highway. Key infrastructure such as rail, natural gas and electrical power infrastructure passes through the project’s claims making an ideal scenario for an industrial mineral mining operation.
Raleigh Lake Claims
The Raleigh Lake Project claims cover approximately 47,700 hectares and come within 10 kilometres of the town of Ignace, Ontario. The Raleigh Lake Project is owned 100% by ILC, with no underlying royalties.
Mineralization at Raleigh Lake
Pegmatites and corresponding lithium, and cesium/rubidium mineralization trends were identified in 1999 by a previous operator searching for tantalum mineralization. Pegmatites 1 – 3, and the Johnson pegmatite were known at this time.
Geology and Pegmatite Emplacement at Raleigh Lake
The “Two Mica Granite” is thought to be a source of the lithium-cesium-tantalum (LCT) pegmatites at RaleighLake. The Two Mica Granite occurs at regional structural boundaries between granitic batholiths and metasedimentary rocks. The recent discovery of pegmatites in the eastern claim area and south of the Balmoral River in what appear to be structural conduits within the White Otter Batholith indicates that the system is extensive and intrudes a broad region of host lithologies increasing the potential for discovery of highly evolved pegmatites.
Pegmatite emplacement is commonly depicted as concentric zones emanating from the source pegmatite with the simpler and more barren varieties closer to the source and the more complex lithium-tantalum enriched pegmatites further away.
The zonation and emplacement of the enriched pegmatites is also dependent on the structural conduits and traps available to the migrating pegmatite melt as defined by Cerny, 1989.
Mineralization Emplacement Model
- Structural analysis of regional gravity and magnetic surveys shows trans-tensional faulting is extensive at Raleigh
- Trans-tensional faulting provides the structural conduits to transport lithium-bearing magma and creates space to form large pegmatite
- The circled area is known mineralization defined by previous operators and expanded by ILC’s drilling in 2021
- The mineralized zone is confirmed to be over 600m x 400m and consists of shallow dipping pegmatites rich in lithium and rubidium mineralization with zones of highly anomalous amounts of caesium and tantalum
- The coloured dots are lithium values in lithogeochemical samples
- Reactivated faults running NE-SW, associated with pegmatite emplacement and geometry, appear to have offset the pegmatite dykes 1 and 3 approximately 500 – 600m downdip of the surface exposure of Pegmatite
Cross Section NW-SE
- The stacked pegmatites gently dip below the surface and are open to depth
- The number and thickness of the pegmatites appear to increase toward the southeast (SE).
A UAV-MAG survey was flown in 2019 on the then, newly acquired claims. A gridded image of the merged data sets is displayed below. The magnetic body interpreted to be the gabbro and host to the pegmatites is clearly visible in the eastern-central portion of the map. It measures approximately 3 kilometres by 1kilometre and is comparable in dimensions to the gabbro host to rare-metal pegmatite of the Tanco Deposit.
Interpretations from the 2021 Spring Drilling Campaign
Many pegmatites Cored in the Spring 2021 drilling program are hosted within a broad gabbro rock. However, drilling also encountered another prospective host rock identified as highly magnetic mafic volcanic rocks. Characterized by an elevated magnetism and an abundance of chlorite-epidote-qtz carbonate alteration and garnetiferous stringer veins. These stringer veins, their carbonate components, and dissolution texture extend to a considerable depth in hole and are thought to be a result of meteoric origin related to a deep-rooted fault structure-oriented near-parallel to the drill trace of RL21-04. This significant geological break in the bedrock architecture between RL21-04 and Zone 1 pegmatites is a highly prospective target for follow-up work. The highly contrasting magnetic signatures and varied metavolcanic basement rocks can easily be delineated in the UAV airborne data.
It is believed that the highly magnetic rock units overly the source melt and blind feeding structures for the Zone 1 pegmatites. Randomized check samples discovered anomalous rubidium values of 297ppm and349ppm occur over 0.52m and 1.03m respectively in a deformed zone of mafic volcanics with increased concentrations of quartz, coarse-grained biotite, and actinolite.
Lithium remains only slightly elevated at 200ppm and 210ppm for these sample intervals that run between a downhole depth of 143m to 146m in RL21-04. There is a good correlation between elevated rubidium values in metavolcanic rocks found to be in close proximity to spodumene-bearing pegmatite emplaced nearby. The dispersion of rubidium around pegmatite in the host indicates hole RL21-04 is near the pegmatite source and will therefore be tested in future drilling programs.
The degree of rare-metal dispersion into their volcanic host around pegmatite bodies at Raleigh Lake is an indicator of a strong mineralizing system, a prolonged crystallization history, and that the structural system feeding the known pegmatites is nearby and capable of hosting a system on a similar scale to the Tanco Deposit.
Plan map showing the 2021 drilling with significant pegmatite intercepts, the interpreted fault, and approximate location of the cross-section NW-SE.
The Two-mica granite, mapped at the south-western extent of the survey area, is thought to be the parental magma source for the spodumene-bearing pegmatites at Raleigh Lake. It is located between four and six kilometres, ideal from what was previously interpreted as a gabbro intrusive. That gabbro host is the optimal distance from the fractionated parent body to favour the lithium-tantalum mineralization.
Several regional structures can be interpreted from the magnetic image. Structures migrate from the Two-mica granite through the metavolcanic basement and create both pathways and traps for pegmatite melt in the main pegmatite field.
The company has expanded the project area through additional staking after reviewing historic documents that show Two Mica granites, the hypothesized source material for the LCT pegmatites, also occur further south of the project area adjacent to the White Otter Batholith. In addition, historic work by the Canadian Nickel Company indicates that there is potential for magmatic sulphide deposits within the Raleigh Lake Greenstone Belt.
The flat-lying nature and zonation of the pegmatites at Raleigh Lake bears a resemblance to the Tanco pegmatite at Bernic Lake.
- Discovered in 1929 completely hidden under Bernic Lake, Manitoba
- Consists of a sub-horizontal body 1.5 km x 1 km and up to 100m thick.
- Mined since 1967
- Global role in the production of Ta, Cs & Li
- The strength of mineralization is increasing towards the magnetic anomaly
- Structures define interpreted mineralized conduits
- Geochemistry defines mineralized conduits
- Magnetic data define structural traps and expansion zones that can host large fractionated pegmatites similar to Tanco
Comparing Raleigh Lake to Tanco
In February of 2010, P. Vanstone of Vanstone Geological services and former Chief Geologist at Cabot Corporations’ Tanco Mine was commissioned by Abaddon to conduct a property and diamond drill core review. Key comments from his report confirm that the pegmatite fractionation trends [at Raleigh] are towards the southeast. Additionally, there is a prominent gabbroic hosting body encapsulating pegmatite #1, and this information, along with sheared contact relationships caused by reactivated structural features, multiple pegmatite phases insinuates a complex pegmatite emplacement history that adds exceptional value to the Project and its potential to host a significant pegmatite body (Vanstone, 2010).
Patrick McLaughlin, P.Geo, a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects has reviewed and approved the technical information contained herein.