The 2022 Exploration Program Highlights
- 3,700 Metre Drill Program (25 drill holes)
- Testing several targets on the Ulu property, improving the Flood Zone resource model
- 3,055-line-km Airborne Magnetometry Survey and Ground VLF-EM survey
- Surface Mapping and Rock Sampling Program
- 1:2500 scale mapping of the Zebra showing, and work on historical showings on the Hood River Project
- Preliminary review of 58 targets within the more than 100 compiled pipeline showings conducted
The exploration program consisted of 25 drill holes totalling 3,700 metres in the Gnu (Nutaaq) zone, Central-C, Axis, sediment core and select targets in the Flood Zone. The objective was to test target areas, in particular the expanding Gnu (Nutaaq) zone, and the Central-C and Axis zones, located within a few hundred metres of the Flood Zone gold deposit. All drilling was completed with oriented core to assist in geological modelling.
An additional sampling program of historical core from nine drill holes was undertaken to better determine mineralization boundaries due to unsampled shoulders on some mineralized zones. In addition, a 3,055-line-kilometre airborne geophysics program and a regional till sampling program on the Roma project were conducted. Detailed review and prospecting/mapping of 58 of the targets within the more than 100 compiled pipeline showings were also completed.
Measured and Indicated Resource of 2.535 million tonnes at an average grade of 7.02 grams per tonne ("g/t") gold ("Au") for 572,000 ounces of gold;
Inferred Mineral Resource of 1.283 million tonnes at an average grade of 7.34 g/t Au for 303,000 ounces of gold;
The updated geological model - using explicit vs the implicit techniques utilized in the previous estimation - has helped define all the reported zones;
Gold mineralisation remains open for further expansion in all contributing zones;
Previously reported metallurgical studies indicate all zones in the MRE can conceptually be co-mingled with +90% gold recovery; and
The multitude of gold showings and zones that have seen only limited detailed assessment provides the Company with excellent resource expansion potential throughout its district scale projects.
Ulu Gold Project Mineral Resource Estimate (“MRE”)*:
The independent and qualified person for the Mineral Resource Estimate, as defined by NI 43-101, is Chris MacInnis, P.Geo (#2059) from ALS-GoldSpot Ltd.
Mineral resources, which are not mineral reserves, do not have demonstrated economic viability. There has been insufficient exploration to define inferred resources above as indicated or measured mineral resources however, it is reasonably expected that the majority of the inferred mineral resources could be upgraded to indicated mineral resources with continued exploration. There is no guarantee that all or any part of a mineral resource can or will be converted into a mineral reserve. The estimate of mineral resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues.
The mineral resources in this estimate were calculated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions and adopted by CIM Council (CIM 2014 and 2019).
The MRE is underpinned by data from 544 on site diamond drill holes totalling 112,880m of drilling
The MRE is reported at a cut off of 1.5 g/t Au for the conceptual open pit and 3.5 g/t Au for the conceptual underground extraction scenarios. The cut-off grades and potential mining scenarios were calculated using the following parameters; mining cost: $110.00/t UG and $4.13/t OP; G&A and site service costs: $44.20/t; processing cost: $36.3/t; recoveries 92%; gold price US$1750.00 per ounce; and minimum mining width of 2.0 metres in order to meet the requirement that the mineral resources show “reasonable prospects for eventual economic extraction.”
Original Au assays were composited to 1m with 4,231 composites generated in the mineralised domains including 3,934 composites generated for the Flood Zone, 81 composites for the NFN Zone and 154 composites for the Gnu (Nutaaq) Zone.
Grade interpolation was performed by ordinary kriging (OK) for the Flood Zone and inverse power of distance to the third power for all other zones. The informing data was composited to 1.0m for all zones except GNU, which used a 0.75m composite size.
High grade capping supported by statistical analysis was completed on composite data from each zone and was established at 41 g/t Au for the Flood Zone, 35 g/t for the Gnu(Nutaaq) Zone and 41 g/t Au for the NFN Zone.
All figures are rounded to reflect the relative accuracy of the estimates. Metal content is presented in troy ounces (tonnes x grade (g/t) / 31.10348).
The Author is not aware of any known environmental, permitting, legal, title-related, taxation, socio-political or marketing issues or any other relevant issue not reported in the technical report that could materially affect the MRE.
The effective date of the MRE is 08 February 2023.
The Ulu Gold Project MRE is based on 544 diamond drill holes totalling 112,880 m spanning over thirty years to the present along and adjacent to the Ulu Fold Hinge. The MRE represents a significant adjustment in geological and mineralisation style understanding and confidence in the mineralisation modeling to a historic MRE published by a previous operator in 2015 by:
- Modeling distinct high-grade zones with lower grade zones where they occur, and modeling two distinctive styles of mineralisation separately;
- Addition of new assays from drilling campaigns in 2019 through 2022 totaling 88 drill holes for 15,391 m; and
- Modeling portions of the mineral resources with a conceptual open pit mining scenario versus a solely underground extraction scenario.
* As reported in the amended technical report, titled “Technical Report on the Ulu Gold Property, Nunavut, Canada“, dated February 22, 2023 and filed on SEDAR.
In February 22, 2023, the Company reported that the independent and qualified person for the Mineral Resource Estimate, as defined by NI 43-101, is Chris MacInnis, P.Geo (#2059) from ALS-GoldSpot Ltd. had completed an independent Technical Report entitled, Technical Report on the Ulu Project, Kitikmeot Region, Nunavut, Canada.
Ulu Gold Project 43-101 Technical Report
Blue Star is the first company to create GIS databases for all the historic work on the Ulu and Hood River properties
- Scanning and digitizing > 25 historic geology maps
- Digitizing 3,000+ surface mineralization points, 2,700 rock samples, and 2,300 outcrops as well as structural data
- Creating 200+ lithology polygon digital geology maps
- Integrating all surface data into 3D environment
- Rigorous QAQC on historic drill data (477 ddhs) to create master databases for assays, survey data, alteration and drill composites
- Creating 3D solids for alteration, lithologies, mineralization
Digital compilation into 3D has allowed for identification of likely controls on gold transport and localization at Ulu. These include:
- Fluid focus along fold axis (1st order control) at lithologic contacts with high rheology contrast (basalt-sediment)
- Capture of the fluid by planar quartz-feldspar porphyry dikes (2nd order)
- Deposition of mineralization in NW trending fractures (3rd order capture) within competent mafic volcanic unit. High-iron tholeiitic basalt = same host for Doris Au Mine and HGZ at Red Lake (which also has acicular arsenopyrite)
Recognition of these structural controls allows for targeting of similar settings along the Ulu Fold and Hood River Property.
Amphibolite Grade Gold Mine
Quebec: Aspy > po > py. Tourmaline rich. 7+ M oz Au. Hedenbergite alteration. Ductile deformation.
Ontario. 4.17 MT @ 6.38 g/t AuPo » Py. Ductile deformation.
Nunavut. 3.4 M oz Au produced at 9.0 g/t. Aspy + loellingite + po with quartz + hedenbergite.
Ontario. 21 M Oz Au total. Golden Giant grade = 11.47 g Au.
- Grain boundaries + free gold. Calc-silicate alteration including actinolite and diopsidic hedenbergite.
- Features consistent with amphibolite grade Au deposits include ductile deformation, arsenopyrite + lollingite + pyrrhotite ore mineral assemblage, calc-silicate alteration.
Great Bear Resources’ LP Fault Zone
Mineralization is in amphibolite grades, 15.45 g/t Au over 25.15 m (389 gram metres)