Exploration

The Buckreef Project is full of exploration potential. We recently announced the discovery of the Buckreef West Zone – interpreted a splay off the Main Zone Shear Zone (see below). There will be more updates on exploration to come.

Rock Sample
River Survey
Geologist Surveying

Boots on the ground - that is where the geologists feet belong. At Buckreef, since February, our geologists have been active in the field, ground truthing historical targets and discovering new ones. These are exciting times for the project as the extent of the exploration potential becomes apparent.

EXPLORATION & MINERAL RESOURCES

TanGold continues to evaluate the full potential of the Buckreef property and identify opportunities for the discovery of additional mineral resources and their conversion to mineral reserves. Successful exploration will also provide greater production flexibility and growth. To achieve this goal the Company has:

  • Re-evaluated the Buckreef Main Zone for strike extensions, off-shoot splays, and at depth
    potential. The deposit is open in all directions (See Figure 6);
  • Drilled the Buckreef West target, a splay off the Buckreef Main Zone, with positive drill results,
    further follow-up drilling will occur in 2021 and 2022. Buckreef West has the potential to add
    additional resources to the oxide and sulphide mine plans (See Figure 7 and 8);
  • Discovered the Anfield Zone, a parallel structure 500m to the east of the Buckreef Main Zone.
    Initial grab sample results have been high-grade, including

Evaluated and identified numerous other targets at Buckreef, which form part of an exploration pipeline or ‘Exploration Triangle’ at the Buckreef Project.

BUCKREEF MAIN ZONE DRILLING RESULTS AND INTERPRETATION

The Buckreef Main Zone has been re-evaluated and exploration targets to expand the zone have been identified. Results to date evidence a vertically extensive shear zone extending nearly 2km on strike in a NE-SW trend. The deposit is open along strike and at depth.

The significant mineralized intercepts of the Buckreef Main Zone are as shown in the Figure 6. It is evident that the deposit remains open on trend to the north-east and south-west. As noted, the Company has planned a drill program, specifically to explore potential mineralization extensions to the north-east, southwest and to upgrade Inferred Mineral Resources, particularly at the base of the 2018 Pre-Feasibility pit shell where a ‘saddle’ exists between two deeper pit floors. Procurement of a drilling contractor(s) is in progress and analysis of historical core to refine the drilling program is ongoing.

‘Deep’ drilling was completed in Q1 2021. It is evident that 2-3 high grade shoots exist (dipping to the south) and that the deposit remains open at depth. The viability of underground mining will be examined during the feasibility study. The Company does not intend to drill additional deep holes at this time, as the continuity of the deposit at depth has been demonstrated.

FIGURE 6: LONG SECTION OF BUCKREEF MAIN ZONE (VIEW TO THE WEST) SHOWING 1M COMPOSITE VALUES AND 2018 PFS PIT OUTLINE



INTRODUCING BUCKREEF WEST:

During 2020 and into early 2021 the Company identified and pursued drilling at Buckreef West. The goal of the program was to define additional oxide mineral resources and define a new mineralized shear zone. During the past two quarters, a total of 2,903m from 31 drillholes have been drilled at Buckreef West to conclude the current phase.

The drilling has consistently intersected a well pronounced sheared meta-basalt, with variable sulphide mineralization, and mild to strong quartz-carbonate-sericite-pyrite alteration typical of the Buckreef Main Zone. The Company will continue to evaluate the drill results and geology and prioritise the most prospective areas for infill drilling, with the explicit aim of upgrading the target to indicated mineral resource and ultimately into the mine plan. Assay results from samples received during the programme are summarized in the map, aerial image and table below.

Buckreef Main Zone

Buckreef West Drilling & Assay Results

Buckreef Gold concluded the drilling program on Buckreef West during Q2 2021 and full results are presented below in Figure 7, along with discussion and analysis.

A well pronounced sheared meta-basalt zone continued to be intersected with variable sulphide mineralization and mild to strong quartz-carbonate-sericite-pyrite alteration typical of the Buckreef Main Zone.

Highlights include:

  • All reported intercepts are at shallow depth on a well-defined structure which is interpreted as a
    splay off the Buckreef Main Zone; and
  • Over 400m of strike length has been drilled to date and the deposit remains open at depth and
    along strike in both directions.

Figure 7: Buckreef West Assay Results

1. The sample chain of custody is managed by the Buckreef Gold geology team on site. Reported results are from diamond drilled core samples. Intervals of core to be analyzed are split into half using a mechanized core cutter, with one half sent to the Laboratory for geochemical analysis and the remaining half kept in storage for future reference and uses. Diamond drilled core has been a HQ size and recoveries are consistently 100% across all drill holes intercept reported.

2. Sampling and analytical procedures are subject to a comprehensive quality assurance and quality control program. The QAQC program involves insertion of duplicate samples, blanks and certified reference materials in the sample stream. Gold analyses are performed by standard fire assaying protocols using a 50-gram charge with atomic absorption (AAS) finish and a gravimetric finish performed for assays greater than 10 grams per tonne.

3. Sample preparation and analysis are performed by independent Nesch Mintech Laboratory in Mwanza, Tanzania. Nesch Mintech Laboratory is ISO17025 accredited and employs a Laboratory Information Management System for sample tracking, quality control and reporting.

4. The results summarized in this Management’s Discussion and Analysis are from Buckreef west shear zone prospect. The prospect is about 200m western of known Buckreef Main Zone. The Intercepted shear zone from the drilling programme extend for over 450m strike length and results reported covers about 250m strike length of the shear zone. The intersections reported here are a down-hole length and may not represent true width, but the true width is estimated to be between 50% - 60%.

The spatial location of the mineralized intercepts is shown in the Figure 8. The Company will provide a further update on Buckreef West in the future. 

Figure 8: Buckreef Main Shear Zone Deep Drilling Spatial Location of Mineralized Intercepts

Anfield Zone

Buckreef Gold believes that it has made a major discovery of three closely spaced parallel, gold bearingstructures at the Buckreef Project, collectively now known as the Anfield Zone.

Highlights from the newly discovered zone include:

  • The new prospective gold mineralized zones, totaling a combined 2.9km strike length were
    identified through geological (field) mapping, sampling and examination of artisanal workings. (See
    Figure 10);
  • Grab samples of mineralized bed (fresh) rock have been assayed, with highlights of:
  • 37.52 g/t
  •  28.55 g/t (See Figure 9)
  • 14.42 g/t
  • Located approximately 500m to the east of the Buckreef Main Zone;
  • Aligns with and trends towards the Eastern Porphyry Mineral Resource; and
  • Follow-up field work and diamond drilling planned for 2021 and 2022

Figure 9: Mineralized Sample From Artisanal Shaft at Anfield Zone. Sample Assayed at 28.55 g/t

The discovery has been made through field / geological mapping of outcrops and scattered artisanal workings, with care being taken to differentiate between fresh rock mining and alluvial mining. Mapping was undertaken from March 2021 through to June 2021. The fresh rock samples, obtained from a deeper artisanal mine shaft, have all the hallmark characteristics of mineralization associated with the Buckreef Main Zone.

Multiple artisanal shafts have been mapped, most of which are currently flooded. From this mapping, three distinct mineralized zones all aligning with local mine scale shear fabric have been interpreted. The Anfield Zone is parallel to and is located approximately 500m to the east of the Buckreef Main Zone. Further, the trend aligns with the Eastern Porphyry Mineral Resource. (Measured and Indicated MR or 1. 1MT @ 1.18 g/t containing 41.7 k oz of gold, and an Inferred Mineral Resource of 1.24 MT @ 1.39 g/t containing 55.38 k oz of gold).

A small number of initial grab samples were collected from the Anfield Zone, specifically where a deeper shaft had been developed by artisanal miners. Assay results are shown in the table below: 

A second sampling campaign of grab samples was also undertaken in June 2021 to verify the initial highgrade results. Assay results are shown in the table below: 

Notes:

1. The sample chain of custody is managed by the Buckreef Geology Team on site. Reported results are from grab samples selected from piles of excavated rock located next to the abandoned artisan pits. The rock chips were carefully sampled by geologist and grouped based on the intensity of shearing, alteration and quartz veining.

2. The samples were subjected by insertion of blank coarse materials to ensure quality assurance and quality control at this early stage of the program. Gold analyses are performed by standard fire assaying protocols using a 50-gram charge with atomic absorption (AAS) finish and a gravimetric finish performed for assays greater than 10 grams per tonne.

3. Sample preparation and analysis are performed by independent Nesch Mintech Laboratory in Mwanza, Tanzania. Nesch Mintech Laboratory is ISO17025 accredited and employs a Laboratory Information Management System for sample tracking, quality control and reporting.

4. The results summarized in this release are from Anfield Zone. The zone is about 200m East of and subparallel to known Buckreef Main Zone.

5. qv=quartz vein, py=pyrite, quart-Carb = quartz – carbonate vein

Buckreef Gold actively maintains positive relationships with the limited number of artisanal miners currently
in the vicinity of the Anfield Zone, which is well demonstrated from the geological mapping and sampling
campaigns. While there are a significant number of artisanal workings in the area, most are now flooded
and inaccessible.

 

Figure 10: Anfield Zone in Relation to Buckreef Main Zone