Hasbrouck Gold Project Exploration
West Kirkland’s district-scale exploration objective is to find gold that can be trucked to the planned and permitted heap leach processing facilities at Three Hills Mine and Hasbrouck Mine.
West Kirkland has identified high-grade epithermal vein and bulk tonnage exploration targets at:
- Gold Mountain (100% West Kirkland)
- Hill of Gold (100% West Kirkland)
- Three Hills (75% West Kirkland, 25% Waterton)
- Hasbrouck Peak (75% West Kirkland, 25% Waterton)
Gold Mountain Exploration
West Kirkland acquired Gold Mountain in late 2017 and immediately identified a significant new at- or near-surface gold and silver target. Gold Mountain is 1 mile east of Hasbrouck Peak – a short trucking distance from the planned Hasbrouck Mine heap leach and 5 miles from the planned and permitted Three Hills Mine heap leach.
Gold Mountain – Historic Surface Sampling & Drilling
Assay results recently announced from multiple sections of continuous surface sampling across strike in the target zone indicate higher grades than the reserves at either Three Hills Mine or Hasbrouck Mine.
The Gold Mountain target was identified by analyzing the extensive historic exploration data-base. Historic gold grades along existing road-cuts were found to be as good or better than Hasbrouck reserve grades. This large historical data base together with field samples and observations allowed West Kirkland to map the bedding of known structures and completed a three-dimensional geological model of Gold Mountain.
The Hasbrouck Technical Report summarizes one of the key ore controls at Hasbrouck as: “Stratigraphic control, whereby the porous volcaniclastic units are preferentially mineralized, is prevalent throughout the deposit, but is especially evident in many of the moderate-grade zones…”. Comparison of the new Gold Mountain three-dimensional model to the flat-bedded controls on the adjacent Hasbrouck Peak demonstrate the potential for a relatively flat-lying, thick, and near-surface deposit at Gold Mountain.
Some historic drilling did test the flat-lying, gold bearing zones that form the new targets, but when the historic road-cut were sampled and drilled in the 1980’s and 1990’s, the flat-bedded host rock control of gold mineralization was not recognized or understood. Gold prices were also lower then, causing exploration at the time to focus on high-grade targets.
From the database West Kirkland identified 1,608 feet (490 meters) of road-cuts into Gold Mountain that have gold and silver assay values reported below. Sampling was in the form of 20 foot (7m) continuous samples taken along the road-cuts.
Historic Road-cut Continuous 20 foot Chip Sample Sections
|Surface Samples||Interval (ft)||Gold (g/t)||Silver g/t||Location|
|Road-cut 1||441||0.87||2.4||NE Side (26 samples)|
|Road-cut 2||917||0.65||13.2||SW Side (47 samples)|
|Road-cut 3||250||0.68||22.5||East-High (16 samples)|
Mineralized road-cuts are found to have similar grades to the Hasbrouck Mine Reserves (0.58 g/t Au and 7.9 g/t Ag) which is located approximately 1 mile to the west. Mineralized road-cuts are close to the flat-dipping contact of two mapped units and in all cover a large area. Three 250-foot sections of road-cut have low values and are interpreted as being off the layered contact. Some mapped and well-mineralized road-cuts were not sampled and West Kirkland has subsequently sampled these.
Results of the limited historic drilling under the road-cuts are given in the table below. Historic deep drilling which cut across the mountain is interpreted to have been collared in or under the newly identified flat-bedded contact. Historic drilling targeted large high grade structures below this layer. Areas above historic road-cuts host the new flat-bedded target and are open for new road-cut sampling/trenching and further drilling. The historic drill holes that intercept the newly-identified flat-bedded target have similar grades to the Hasbrouck and Three Hills Reserves. See table below.
Historic Drill Holes in the Area of the Flat Road-cut Targets
|Drillhole||Interval (ft)||Gold (g/t)||Silver g/t||From (ft)|
The interpretation of stratigraphic control at the nearby Hasbrouck deposit supports West Kirkland’s interpretation at Gold Mountain.
Estimation of the overall dip and thickness of the newly-identified target requires further roads to be cut, both above and below existing road-cuts, as well as several short vertical holes drilled into exposed mineralization.
Gold Mountain – 2018 Surface Sampling
A historic, north-east trending, near-vertical narrow vein on the east side of Gold Mountain may be a feeder to the flat-bedded target. This vertical zone, from which small- scale production had been performed in the early 1900s from portals on multiple levels, has been tested by several historic holes which returned low values. A series of high-grade grab-samples were taken over 280 meters on this interpreted vein, on strike and trending north east. These outline the target, see figure below. Values range from 0.29 g/t gold to 50 g/t, with nine values ranging from 10 g/t to 20 g/t gold. The width of this vein is unclear. The intersection of the high-grade vein and the flat-bedded target has not yet been drilled or sampled; this intersection area is also a target for new road-cuts/trenches and surface sampling.
In June 2018, West Kirkland reported new high-grade assay results from continuous sampling completed at surface on the Gold Mountain target, located near the Company’s Hasbrouck Gold Project, which outline clear targets for shallow surface drilling. New assay results from the east and central areas of the Gold Mountain target include:
- 160 feet (49m) with an average of 4.34 g/t gold (across strike)
- 140 feet (43m) with an average of 4.32 g/t gold (across strike)
- 140 feet (43m) with an average of 2.15 g/t gold (across strike)
Previously announced results from the west part of the Gold Mountain target include:
- 140 feet (43m) with an average of 3.40 g/t gold (across strike)
- 100 feet (30m) with an average of 3.67 g/t gold (across strike)
|Surface Samples||Length||Gold (g/t)||Location||Orientation||Reported|
|12||240’ (73m)||0.87||SR-04||Across strike||May 17 2018|
|11||220’ (67m)||1.27||SR-01||Across strike||June 07 2018|
|5||100’ (30m)||1.85||SR-05||Across strike||June 07 2018|
|5||100’ (30m)||1.49||SR-02||Across strike||June 07 2018|
|3||60’ (18m)||1.32||SR-02||Across strike||June 07 2018|
|7||140’ (43m)||1.05||SR-09||Across strike||June 07 2018|
|4||80’ (24m)||0.53||NP-12||Across strike||June 07 2018|
|6||120’ (37m)||0.65||NP-13||Across strike||June 07 2018|
2018 Gold Mountain Drill Program
West Kirkland’s 2018 surface sampling and mapping program outlined clear drill targets with the potential of adding at-surface ounces from 0 to 200 feet (60m) deep within one mile from the Company’s planned heap leach at the Hasbrouck Mine.
These encouraging results are being used to define a 3,500 ft drill program planned for August 2018. A series of low cost, 100 ft (30 m) holes, collaring in the mineralization, spaced at 200 ft, is planned. Drilling will be along the top of the newly delineated gold zone on Gold Mountain, the initial drill target being 120 ft to 200 ft (40 m to 60 m) wide and 2,600 ft (800 m) long. Drilling is planned to collar in known gold mineralization at surface. Results will be utilized for preliminary ore body modelling and economic pit delineation.
Four targets at Gold Mountain are planned to be drilled (labelled 1-4 in above map). They are controlled by clearly-identifiable, gold-bearing structures. Textures and controls for gold mineralization fit the classic low-temperature “epithermal” near-surface formation model, very similar to the nearby Hasbrouck Mine deposit. Further surface sampling will be done where the targets are open. If results justify, a second round of deeper drilling will be performed.
The number of holes and budget will be modified depending on what is found in the drill road excavations.
The Company intends to use a low-cost air-track drill rig for this program. The air-track drill rig is similar to machines used to drill and blast in normal mining activities. Gold mineralization in the target zone is expected to be found starting at surface and going down 100 ft (30 m) to 200 ft (60 m).
Exploration targets at Gold Mountain (100% WKM Option Interest) are located approximately one mile east of the Company’s Hasbrouck Mine (75% WKM, 25% Waterton Fund).
Gold Mountain Metallurgical Test Program
Crushed reject material remaining after recent assays from continuous surface sampling are currently being tested for amenability for heap leaching by “Bottle Roll” tests at Kappes Cassiday & Associates, Reno. The material is well oxidized and fractured.
Hasbrouck deposit Exploration
The Hasbrouck Deposit is a low-sulfidation, epithermal gold–silver deposit and is located in the western portion of the Divide Mining District. Hasbrouck Peak, which forms the core of the deposit, is composed primarily of tuffs and epiclastic sediments of the Siebert Formation, which is underlain by Fraction Tuff. Several occurrences of chalcedonic sinter, deposited during hot spring activity, exist at and near the top of the mountain. Gold and silver mineralization outcrops over much of the western half of Hasbrouck Peak.
The currently-known mineralization is approximately 1,900 ft east–west by 1,100 ft north–south and has been drill-tested to a depth greater than 900 ft. Mineralization is open to the north and south at depth.
No exploration is currently planned at the Hasbrouck Deposit as this deposit is well-drilled with 331 boreholes in and around it. Modern exploration started in 1970s and has progressively continued since then to adequately defined the Resource and Reserves.
Three Hills mine Exploration
The Three Hills Deposit is a low-sulfidation, epithermal gold deposit, with mineralization associated with structural features, rock-unit contacts, and with high-permeability lithology. Gold mineralization occurs in a zone of pervasive silicification within the Siebert Formation and the upper 10 to 30 feet of the Fraction Tuff. The contact between these two units contains consistently higher grades of gold and is commonly argillized. The currently known Resources extend 600 ft east–west by 2,000 ft north–south and have been drill-tested to a depth greater than 1,000 ft. Mineralization remains open to the east and at depth. The Company continues to explore this deposit.
In July-August of 2014, West Kirkland drilled four exploration holes on the eastern flank of the Three Hills deposit, testing a newly developed structural interpretation of the deposit. The company has identified northwest structures as a potential host of high-grade mineralization. The company tested for zones of structural preparation near the contact between the Siebert formation and the Fraction Tuff.
Three Hill plan map showing target structure and 2014 drill results
Three Hills facing west showing younger Brougher Dacite cap on the north hill which has eroded on the south hill, suggesting a fault zone
Hole TH14R-004 returned 50.3 meters grading 0.73 g/t Au and 3.2 g/t Ag within a zone of intersecting structures and includes 9.2 meters at 2.27 g/t Au. Mineralization started 26 meters above the contact between the Siebert and Fraction Tuff and continued 24 meters below the contact. This intercept is 70 meters northwest of hole TH12R-15, drilled by a previous owner, which returned 66 meters of 3.3 g/t Au in a similar setting at the same elevation.
A table of West Kirkland's 2014 Exploration drilling at Three Hills is presented below.
|Hole ID||From (m)||To (m)||Length (m)||Au (g/t)||Ag (g/t)|
*true thickness has been estimated by Company geologists to be approximately 70% of length
Hill of Gold Exploration
In late 2016, West Kirkland leased the Hill of Gold deposit with an option to acquire a 100% interest. Hill of Gold is located equidistant between the Three Hills and Hasbrouck deposits and is now being explored as a possible additional source of ore for processing for the heap leach at the fully-permitted Three Hills Mine some three kilometers due north.
Historical metallurgical work at Hill of Gold indicates that mineralization is oxidized and amenable to heap leaching at 1.5 inch particle size with 80% gold recovery. The host rocks and geological setting at Hill of Gold are very similar to the Three Hills deposit.
Drilling performed in 1993 at Hill of Gold is in the same area that the Company is now targeting for follow-up drilling, and includes Hole 93-63 which intercepted 32 meters of 0.5 g/t gold at 58 meters below collar, and Hole 93-61 which intercepted 41 meters of 1 g/t gold at 70 meters below collar. Drilling in this same area in 1996 included Hole HG96-5 which intercepted 29 meters of 1.2 g/t gold at 55 meters below collar and Hole HGC96-6 which intercepted 17 meters of 2.9 g/t gold at 59 meters below collar. Modelling by West Kirkland suggests that these intercepts are open for further expansion, shallow enough for open pit mining.
West Kirkland drilled one hole at Hill of Gold in early 2017 which successfully expanded the gold zone previously defined by the historical 29,926 feet of drilling which involving 83 reverse circulation holes and 6 core holes:-
|Hole No.||From (m)||To (m)||Length (m)||Au (g/t)||Ag (g/t)||AuEq (g/t)|
|HILL OF GOLD||HOG17-001||0.0||103.6||103.6||0.5||8.0||0.6|
AuEq grade is (gold grade) +( silver grade multiplied by $16.89 divided by $1,200)
Further drilling at Hill of Gold will be targeted up–dip towards surface from this initial gold bearing intercept.
Authors and Qualified Persons Statement
R. Michael Jones, CEO of West Kirkland Mining, and a qualified person as defined by NI 43-101, has reviewed and approved the foregoing technical information. He is the non-independent qualified person for the purpose of the information contained on this web page.
1 Technical Report and Updated Preliminary Feasibility Study for The Hasbrouck and Three Hills Gold-Silver Project, Esmeralda County, Nevada, USA, Report Date: September 14, 2016 (the “Technical Report”).