High Grade Gold Assays at Theta Hill
Released
Released
Announcement PDF
21 January 2019
ASX ANNOUNCEMENT
HIGH GRADE GOLD ASSAYS AT THETA HILL
Theta Gold Mines Limited (“Theta Gold” and “Company”) (ASX: TGM) is planning on recommencing
mining activities at the historical TGME mine in South Africa’s Eastern Goldfields. The Company
continues to make good progress with ongoing resource infill classification drilling and plans to issue a
revised resource and reserve statement together with a Feasibility Study in early 2019.
The Company is pleased to report there was high level of activity at the project over the past month and
drilling at Theta Hill deposit for Indicated and Measured resources is now nearing completion for Mining
Right, MR83. Additionally, the Feasibility Study work during the quarter included site visits from
contractors and engineering groups to ensure independence and to support the costing for financial
models.
HIGHLIGHTS
First phase drilling at Theta Hill near completion.
High grade assays returned from the December quarter program.
Feasibility Study and Mining Reserve in progress.
Notable intersections at Theta Hill from December quarter program include:
11m @ 2.1g/t Au from 8m in DG4RCWAD16, including 1m @ 9.5g/t Au
1m @ 27.5g/t Au from 8m in DG4RCWAD20
2m @ 5.9g/t Au from 24m in DG4RCWAD21
1m @ 5.2g/t Au from 57m in RCBH73
8m @ 1.8g/t Au from 22m in RCBH24
3m @ 3.4g/t Au from 84m in RCBHTN124, including 1m @ 8.3 g/t Au
A Reverse Circulation (RC) drilling program is also completing resource delineation on satellite
opencasts targets (within 2km of the TGME Plant) and will provide additional resources for the
updated feasibility study resource estimate planned for Q1 2019.
2019 drill program has recommenced at Columbia Hill.
At Columbia Hill follow‐up Phase 2 intersections have confirmed more high grade shallow gold
intersections on the Bevetts and Rho reefs, with notable results including:
1m @ 10.1g/t Au from 18m in RCBHI41
1m @ 5.6g/t Au from 68m in RCBHI44
1m @ 7.5g/t Au from 31m in RCBHI45
10m @ 1.9g/t Au from 36m in RCBH46
At Scammells (satellite target) an initial phase of drilling managed a number of significant
intersections, although ground conditions were very broken, and a number of boreholes still
require deepening to reach target. Notable results included:
1m @ 5.6g/t Au from 18m in RCBHSC3
1m @ 13.8g/t Au from 20m in RCBHSC9
Theta Gold Mines Limited ABN 30 131 758 177
Level 18, 111 Pacific Highway, North Sydney NSW 2060
Tel: +61 2 9460 2021 Email: info@thetagoldmines.com
www.thetagoldmines .com
Chairman, Bill Guy commented: “The last of 2018 drill assays for Theta Hill are showing continued good
grades which is causing much excitement in the team. Just 3km to the west of the TGME Plant, Columbia
Hill continues to show good potential, so much so that additional drilling is now underway to build up the
geological model for that deposit”.
“As part of the Feasibility Study, the TGM Board will develop more clearly delineated timelines and work
schedules to bring the existing TGME plant back into production. The on‐site team is back at work and
the 2019 work program has begun with environmental studies to support the permitting process for
open cut developments,” Mr Guy said.
SUMMARY
The Company drilled over 7,400m during Q4 2018, and since the last resource update (26 September
2018 ASX: Theta Hill Open Cut Grows JORC Resources to 5.8 Moz). The team in country continues to
use two reverse circulation (RC) drill rigs that worked up to Christmas 2018, with one being
recommissioned on Columbia Hill.
Since the Theta Hill drill program began over 13,000m of drilling has been completed using 297 vertical
boreholes (Diamond/RC). The drilling spacing is now nominal 45m forming systematic grid. Over 14,300
samples have been dispatched for assay at SGS Laboratories at Barberton.
During Q4 2018 the RC infill resource drilling was completed at Theta Hill. Evaluation was initiated on a
number of other targets on 83MR (vis Columbia Hill, Day Mine and Scammells ‐ Figure 1). At Columbia
Hill initial resource estimations will be completed during February 2019.
Figure 1: Locality of Opencast Targets on 83 MR
(Historical underground working pink & white, yellow MR 83 Farm boundary)
2
Theta Hill Indicated Resource Drilling
Resource drilling at Theta Hill (Figures 2 & 3) has now been completed. During Q4 2018, a further infill
program was completed at Theta North to bring the Lower Theta (Block 7) and the Beta Reef (Blocks 6 &
10) into an Indicated resource category.
Figure 2: 31st December 2018 Distribution of Boreholes at Theta Hill North
Figure 3: Theta Hill cross section looking north showing thick Bevetts / lense development
and Upper and Lower Theta mineralized zones.
All assays have been returned for December 2018 drilling (Table 1), and a further phase of shallow
drilling was completed testing continuity of stratigraphically higher level Bevetts and U Theta
3
mineralisation previously delineated by Lower Theta drilling and Bevetts trenching and RC drilling. The
distribution of drilling is shown in Figure 2. Currently the geological model is being updated, and
incremental resources estimated.
Table 1: Theta Hill ‐ intersections (> 1 g/t Au)
BHID
THETA DG4
From
m
To
m
DG4RCWAD3
DG4RCWAD4
DG4RCWAD5
4.00
11.00
7.00
5.00
13.00
12.00
Width
m
Au g/t
Au Comments
1.00
2.00
5.00
2.52
1.95
1.39
Bevetts
Bevetts
Bevetts
Au Content
Cm.g/t
Back calc in situ Reef
g/t over 25cm
252
389
697
10.08
7.78
5.58
EOH Comments
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4RCWAD5 incl
7.00
8.00
1.00
4.45
Bevetts
445
17.80
DG4 Bevetts & U Theta
DG4RCWAD5
DG4RCWAD5
DG4RCWAD7
DG4RCWAD15
DG4RCWAD16
31.00
36.00
35.00
14.00
8.00
34.00
37.00
37.00
16.00
19.00
3.00
1.00
2.00
2.00
11.00
1.20
1.23
1.87
1.55
2.13
U Theta
L Theta
L Theta
Bevetts
Bevetts
359
123
373
309
2,343
4.79
4.92
7.46
6.18
8.52
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4RCWAD16 Incl
8.00
9.00
1.00
9.52
Bevetts
952
38.08
DG4RCWAD16
DG4RCWAD17
DG4RCWAD17
DG4RCWAD18
DG4RCWAD20
DG4RCWAD21
DG4RCWAD21
40.00
7.00
17.00
9.00
8.00
16.00
24.00
45.90
8.00
18.00
10.00
9.00
17.00
26.00
5.90
1.00
1.00
1.00
1.00
1.00
2.00
7.34
2.10
1.19
0.61
27.50
2.27
5.92
L Theta
Bevetts
U Theta?
U Theta?
Bevetts
U Theta
L Theta
4,331
210
119
61
2,750
227
1,184
29.36
8.40
4.76
2.44
110.00
9.08
23.68
DG4 Bevetts & U Theta
BHID
THETA N BLK 10
From
m
To
m
Width
m
Au g/t
Au Comments
Au Content
Cm.g/t
Back calc in situ Reef
g/t over 25cm
RCBHTNBB10
RCBHTNBB14
RCBHTNBB16
RCBHTNBB16
RCBHTNBB17
RCBHTNBB17
RCBHTNBB2
8.00
21.00
31.00
50.00
12.00
35.00
2.00
9.00
23.00
34.00
52.00
13.00
36.00
4.00
1.00
2.00
3.00
2.00
1.00
1.00
2.00
2.88
2.88
1.03
1.58
1.35
2.95
1.42
Beta?
L Theta
Bevetts
L Theta?
Bevetts
L Theta?
Bevetts/U Theta
288
576
310
316
135
295
283
11.52
11.52
4.13
6.32
5.40
11.80
5.66
BHID
THETA NORTH
From
m
To
m
Width
m
Au g/t
Au Comments
Au Content
Cm.g/t
Back calc in situ Reef
g/t over 25cm
EOH Comments
RCBH73
RCBH73
RCBH73
RCBH92
RCBH13
RCBH24
RCBH24
RCBHTN122
RCBHTN122
RCBHTN123
RCBHTN124
29.00
57.00
60.00
50.00
26.00
22.00
34.00
10.00
39.00
18.00
84.00
30.00
58.00
61.00
51.00
28.00
30.00
38.00
16.00
40.00
19.00
87.00
1.00
1.00
1.00
1.00
2.00
8.00
4.00
6.00
1.00
1.00
3.00
1.02
5.25
1.50
1.22
1.07
1.77
1.51
1.05
3.35
4.74
3.40
Quartz in Shale
Bevetts
Bevetts
Bevetts
L Theta
Bevetts/U Theta
L Theta
Quartz in shale
U Theta
Quartz in shale
Bevett's / U Theta
102
525
150
122
213
1,415
605
630
335
474
1,019
4.08
21.00
6.00
4.88
4.26
7.08
6.05
4.20
13.40
18.96
13.59
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
Theta N Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
DG4 Bevetts & U Theta
EOH Comments
Theta N Beta Block 10
Theta N Beta Block 10
Theta N Beta Block 10
Theta N Beta Block 10
Theta N Beta Block 10
Theta N Beta Block 10
Theta N Beta Block 10
RCBHTN124 incl
84.00
85.00
1.00
8.27
Bevett's / U Theta
827
33.08 Theta N Bevetts & U Theta
RCBHTN125
RCBHTN126
RCBHTN127
66.00
‐
37.00
67.00
5.00
38.00
1.00
5.00
1.00
2.63
1.78
1.19
Bevett's / U Theta
Quartz in shale
Bevetts
263
891
119
10.52 Theta N Bevetts & U Theta
7.13 Theta N Bevetts & U Theta
4.76 Theta N Bevetts & U Theta
Theta Hill Geology
Theta Hill is a significant historic gold producer in the Pilgrim’s Rest area with production from mostly
Lower Theta and Beta Reefs totalling 500koz Au from previous underground operations. The geological
setting of the area includes a capping of Pretoria Group shales, pyroxenite sill and the Bevetts quartzite
and conglomerate which rest on the Bevetts angular unconformity. This sequence is underlain by the
Eccles Formation of the Malmani dolomites, which comprises fluctuating shallow water dolomites with
interbedded narrow shale horizons that mark packages of cyclic sedimentation (deep water to tidal
deposition). Within this package are a number of regional stratigraphic markers ‐ namely the Giant
Chert, Middle Chert and the Beehive Chert. The general attitude of the rock sequence is 7 degrees dip
to the south west.
Gold mineralisation at Theta Hill has mostly developed on the bedding plane parallel thrusts hosting
Beta, Lower Theta and Upper Theta "flat reefs", as well as within the Bevetts thrust packages, and
quartz veining in the Pretoria shales which is controlled by the thrust related structures and splays.
4
Structural features of the area include:
o bedding plane thrusts on the intercalated shale horizons in the dolomites, which are host to "flat
reef" gold mineralisation;
o Thrusting with a SE vergence around the Bevetts Unconformity, which leads to localised repetition of
the Giant Chert ‐ Bevetts Conglomerate/Quartzite;
o Post mineralisation subvertical faulting trending NNW‐SSE and NNE‐SSW. The Fraser Morgan Graben
is a conspicuous NNE trending feature that separates Theta Hill and Browns Hill with a down throw of
over 150m.
Columbia Hill and Scammells Reverse Circulation Drilling
The second rig has been progressing investigations on satellite opencast targets on 83MR. Phase 1
drilling at the Scammells workings was completed and the rig is currently in progress on Phase 2 at
Columbia Hill Mine (see Figure 1). In total a further 1,216m RC drilling was completed at Columbia Hill
over 17 holes during December 2018. This follows on from previous drilling during Q4 2018 that had
encouraging Rho Reef intersections.
At Columbia Hill (Figure 4), the Iota (Rho Reef) underground workings are located on the eastern
extension and the current RC drilling is targeting ground peripheral to these zones. In total 18 RC
boreholes have been completed for 890m (2017‐2018). The target mineralisation zones embrace the
Bevetts thrust and Lense style reefs plus the underlying Rho Reef (Figures 5 & 6 Columbia Hill cross‐
section).
Figure 4: December 31st 2018 distribution of RC drilling at Columbia Hill (Iota Mine workings)
Columbia Hill continues to demonstrate good potential as a satellite resource. Columbia Hill is similar to
Theta Hill in mineralization and geometry, with a thrusted “lense” package located around the Bevetts
unconformity, and a flat to shallowly dipping Rho reef system in the Malmani dolomite footwall. At
Columbia Hill, the Rho Reef mineralization is hosted in bedding plane shears with the gold associated
5
with quartz and oxidized sulphides. Columbia Hill (Iota Mine) results > 1 g/t Au from assays received to
date for Phase 1 are encouraging, and are shown below in Table 2.
Table 2: Columbia Hill (Iota) Q4 2018 Phase 1 RC drilling results > 1 g/t Au
BHID
From
m
To
m
Width
m
Au g/t
Au Comments
Au Content
Cm.g/t
Back calc in situ Reef
g/t over 25cm
EOH Comments
RCBHI12B
43.00
61.00
18.00
2.81
Bevetts / Lense
5,057
11.24
RCBHI12B incl
47.00
59.00
12.00
3.65
Bevetts / Lense
4,384
14.61
Iota Mine P1
Iota Mine P1
RCBHI12B
RCBHI14
RCBHI14
RCBHI14
76.00
‐
16.00
28.00
77.00
1.00
17.00
33.00
1.00
1.00
1.00
5.00
8.76
1.09
2.20
3.69
Rho
Quartz in shale
Bevetts
Rho
876
109
220
1,843
35.04
4.36
8.80
14.74
Iota Mine P1
Iota Mine P1
Iota Mine P1
Iota Mine P1
Rho
1,778
23.71
Iota Mine P1
Bevetts
Rho
123
4,126
4.92
41.26
Iota Mine P1
Iota Mine P1
RCBHI14 incl
28.00
31.00
3.00
5.93
RCBHI15
RCBHI15
29.00
35.00
30.00
39.00
1.00
4.00
1.23
10.31
RCBHI15 incl
37.00
39.00
2.00
19.76
Rho
3,953
79.05
Iota Mine P1
RCBHI16
‐
6.00
6.00
2.32
Bevetts
1,393
9.29
Iota Mine P1
RCBHI16 incl
‐
4.00
4.00
3.19
Bevetts
1,274
12.74
Iota Mine P1
RCBHI17
RCBHI17
RCBHI17B
9.00
53.00
58.00
10.00
54.00
69.00
1.00
1.00
11.00
1.45
4.08
0.91
Quartz in shale
Bevetts?
Rho
145
408
999
5.79
16.32
3.63
Iota Mine P1
Iota Mine P1
Iota Mine P1
RCBHI17B incl
58.00
63.00
5.00
1.29
Rho
RCBHI18
RCBHI19
16.00
1.00
17.00
13.00
1.00
12.00
1.07
2.53
Bevetts
Bevetts / Lense
647
5.18
Iota Mine P1
107
3,036
4.28
10.12
Iota Mine P1
Iota Mine P1
RCBHI19 incl
1.00
8.00
7.00
3.50
Bevetts / Lense
2,448
13.99
Iota Mine P1
RCBHI19B
RCBHI19B
RCBHI20
21.00
38.00
41.00
22.00
39.00
62.00
1.00
1.00
21.00
19.40
4.79
3.61
Bevetts
Rho
Bevetts Lense
1,940
479
7,581
77.60
19.16
14.44
Iota Mine P1
Iota Mine P1
Iota Mine P1
RCBHI20 incl
46.00
57.00
11.00
5.95
Bevetts Lense
6,545
23.80
Iota Mine P1
RCBHI20
RCBHI21
RCBHI22
RCBHI22B
RCBHI24
RCBHI24
RCBHI26
RCBHI26
67.00
19.00
‐
7.00
‐
19.00
46.00
62.00
68.00
25.00
1.00
8.00
4.00
24.00
48.00
68.00
1.00
6.00
1.00
1.00
4.00
5.00
2.00
6.00
5.12
5.17
1.57
1.42
1.25
1.99
4.89
1.79
Rho
Rho
Quartz in shale
Bevetts
Bevetts Lense
Rho
Bevetts
Rho
512
3,102
157
142
500
995
978
1,073
20.48
20.68
6.28
5.68
5.00
7.96
19.56
7.15
Iota Mine P1
Iota Mine P1
Iota Mine P1
Iota Mine P1
Iota Mine P1
Iota Mine P1
Iota Mine P1
Iota Mine P1
RCBHI26 incl
63.00
65.00
2.00
3.89
Rho
777
15.54
Iota Mine P1
RCBHI9C_1
‐
1.00
1.00
1.17
Quartz in shale
117
4.68
Iota Mine P1
Table 4 illustrates a number of significant thicker intersections (up to 21m; vis RCBI12b and RCBHI20)
which have intersected Bevetts thrust controlled Lense deposits. The geometry of these intersections is
being interpreted, but brings a significant exploration potential into play going westwards. Current Rho
Reef intersections are supporting a split (Upper and Lower Rho) reef. Effectively the Rho Reef bedding
plane shear locates on 2 “bounding” structures, leading to drill intercepts collectively being up to 6m
wide (eg RCBHI21and RCBHI15; Figures 5 and 6).
6
Figure 5: Columbia Hill (Iota Mine) Cross Section RCBHI41‐I18 looking north
Figure 6: Columbia Hill (Iota Mine) Cross Section RCBHI39‐I30 looking north
Combined with the Lense style and Rho Reef intersections all above 80m below surface the opencast
target is taking shape. As a consequence, a follow up Phase 2 programme is underway and is increasing
the footprint of opencastable mineralisation. Table 5 shows the Phase 2 intersections > 1g/t Au to 31st
December 2018:
7
Table 5: Columbia Hill (Iota) December 2018 Phase 2 RC drilling results > 1 g/t Au
BHID
From
m
To
m
Width
m
Au g/t
Au Comments
Au Content
Cm.g/t
Back calc in situ Reef
g/t over 25cm
RCBHI32
RCBHI32
RCBHI34
RCBHI34
RCBHI34
RCBHI34
RCBHI39
RCBHI41
RCBHI41
RCBHI43
RCBHI43
RCBHI44
RCBHI44
8.00
65.00
1.00
26.00
36.00
77.00
32.00
18.00
36.00
7.00
70.00
4.00
66.00
9.00
66.00
2.00
27.00
37.00
78.00
35.00
19.00
37.00
8.00
71.00
5.00
69.00
1.00
1.00
1.00
1.00
1.00
1.00
3.00
1.00
1.00
1.00
1.00
1.00
3.00
3.71
1.33
2.91
1.24
1.26
2.44
1.87
10.10
1.58
1.18
3.88
1.03
3.34
Bevetts Thrust
Rho ?
Quartz in Shale
U Rho?
L Rho?
?
Bevetts
Bevetts
Rho
Quartz in Shale
Rho
Bevetts
Rho
371
133
291
124
126
244
560
1,010
158
118
388
103
1,001
14.84
5.32
11.64
4.96
5.04
9.76
7.47
40.40
6.32
4.72
15.52
4.12
13.34
RCBHI44 incl
68.00
69.00
1.00
5.99
Rho
RCBHI45
RCBHI45
RCBHI46
RCBHI46
‐
31.00
28.00
36.00
1.00
32.00
29.00
46.00
1.00
1.00
1.00
10.00
1.10
7.51
1.34
1.93
Surficial
Rho
U Rho
L Rho
EOH Comments
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
599
23.96
Iota Mine P2
110
751
134
1,927
4.40
30.04
5.36
7.71
Iota Mine P2
Iota Mine P2
Iota Mine P2
Iota Mine P2
Results and geology of the Scammells drilling (see Figures 1 and 7) are still being processed, and will be
published later in Q1 2019, after reaming and deepening of 8 boreholes that had collapsing ground
issues have been completed. Figure 7 (below) shows the distribution of Scammells RC drilling collars.
Figure 7: Scammells Reef distribution of RC boreholes as at 31st December 2018
8
For more information please visit www.thetagoldmines.com or contact:
General Enquiries
Rob Thomson, Managing Director
Theta Gold Mines Limited
M: +61 409 843 963
robt@thetagoldmines.com
or
Investor Enquiries
Bill Guy, Chairman
Theta Gold Mines Limited
T: + 61 2 9460 2021
billg@thetagoldmines.com
Competent Persons Statement
Theta Hill, Columbia Hill (Iota Mine ) and Scammells Drilling Results
The information n in this report relating to the Theta Hill and 83MR drilling results is based on, and
fairly reflects, the information and supporting documentation compiled by Mr Phil Bentley (MSc
(Geol), MSc (MinEx), Pr.Sci.Nat. No. 400208/05, FGSSA), a consultant to the Company and a member
of the South African Council for Natural Scientific Professions.
Mr Bentley has sufficient experience that is relevant to the style of mineralisation under
consideration and to the activity being undertaken to qualify as a Competent Person as defined in the
2012 Edition of the Joint Ore Reserves Committee (JORC) Australasian Code for Reporting of
Exploration Results, Mineral Resources and Ore Reserves. Mr Bentley consents to the inclusion in the
report of the matters based on his information in the form and context in which it appears.
Mineral Resources
The information in this report relating to Mineral Resources is based on, and fairly reflects, the
information and supporting documentation compiled by Mr Uwe Engelmann (BSc (Zoo. & Bot.), BSc
Hons (Geol.), Pr.Sci.Nat. No. 400058/08, MGSSA), a director of Minxcon (Pty) Ltd and a member of
the South African Council for Natural Scientific Professions.
The original report titled “Theta Hill Open Cut Grows JORC Resources to 5.8 Moz” was dated 26
September 2018 and was released to the Australian Securities Exchange (ASX) on that date. The
Company confirms that –
it is not aware of any new information or data that materially affects the information included in
the ASX announcement; and
all material assumptions and technical parameters underpinning the estimates in the ASX
announcement continue to apply and have not materially changed.
9
ABOUT THETA GOLD MINES LIMITED
Theta Gold Mines Limited (ASX: TGM) is a gold development company that holds a range of prospective
gold assets in a world‐renowned South African gold mining region. These assets include several surface
and near‐surface high‐grade gold projects which provide cost advantages relative to other gold
producers in the region.
Theta Gold Mines core project is TGME, located next to the historical gold mining town of Pilgrim’s Rest,
in Mpumalanga Province, some 370km east of Johannesburg by road or 95km north of Nelspruit (Capital
City of Mpumalanga Province). Following small scale production from 2011 – 2015, the Company is
currently focussing on the planned refurbishment of the existing CIL plant and nearby mines/prospects
with the intention of resuming gold production and is considering open pit mining where it has
identified mineral resources amenable to open pit production. The Company is presently concluding a
detailed feasibility study and is also in the process of seeking approvals for open pit mining on the
existing mining licences held.
The Company aims to build a solid production platform to over 100kozpa based primarily around
shallow, open‐cut or adit‐entry hard rock mining sources. Theta Gold Mines has access to over 43
historical mines and prospect areas that can be accessed and explored, with over 6.7Moz of historical
production recorded.
10
ANNEXURE 1
MINERAL RESOURCES, SEPTEMBER 2018
Gold
Grade
Tonnage
Gold Content
Resource
Classification
Type of Operation
Measured
Underground
0.09
5.37
0.09
5.37
489
15.7
Underground
4.77
6.21
29,661
953.7
Open Pit
2.72
2.44
6,644
213.6
Mt
Total Measured
Indicated
Tailings
Total Indicated
Underground
g/t
Kg
489
koz
15.7
5.24
0.83
4,373
140.6
12.74
3.19
40,678
1,307.8
21.45
5.22
111,880
3597
Open pit
4.72
5.40
25,472
819
Tailings
0.02
0.57
13
0.4
Rock Dump
0.12
1.64
199
6.4
Total Inferred
26.32
5.23
137,564
4,422.7
Grand Total
39.14
4.57
178,732
5,746.3
Inferred
Note:
1.
Gold price used = USD 1,500/oz
2.
Depletions have been applied
3.
Geological losses of 5% for Indicated and 10% for Inferred were applied
11
ANNEXURE 2
Table 1: JORC Checklist – Table 1 Assessment and Reporting Criteria
Criteria
SECTION 1: SAMPLING TECHNIQUES AND DATA
Explanation
Detail
Nature and quality of
Surface exploration over the Q4 2018 period has involved Reverse Circulation
sampling (e.g. cut
(“RC”) drilling.
channels, random
chips, or specific
The RC drilling has focussed on resource delineation of Indicated resources at the
specialised industry
Theta Hill project (Theta North and the DG4 area on Browns Hill) and Columbia Hill
standard measurement
(Iota Mine).
tools appropriate to the
minerals under
Theta N Drilling as at Dec 31 2018
investigation, such as
down hole gamma
sondes, or handheld
XRF instruments, etc.).
These examples should
not be taken as limiting
the broad meaning of
sampling.
Theta Hill DG4 Drilling as @ 31 Dec 2018
Sampling
techniques
The drilling has supported the completion of a scoping study and initiation of a
feasibility study on the viability of opencasting target reefs including the Bevetts
Reef, Upper Theta Reef, Lower Theta Reef and Beta Reef.
The reef widths are generally between 20 cm and 40 cm but the RC drilling at 1 m
interval samples was utilised optimise recoveries to test the mineralisation and
position of the potential reefs in the Project Area.
During December 2018 a total of 2,088 RC rock chip samples were sent for
analysis; of these, 209 were QAQC samples.
All samples were sent to an accredited laboratory in Barberton, South Africa.
Include
reference to
measures taken
to ensure
The gold bearing reefs have a fairly flat geometry, with an average westerly dip of
approximately 8 degrees. The -90 holes therefore allowed for the samples to be
12
Criteria
Drilling
techniques
Drill
sample
recovery
Logging
SECTION 1: SAMPLING TECHNIQUES AND DATA
Explanation
Detail
sample
taken normal to the reef. At this stage, the 1 m sample will dilute the reef grade and
representivity
will not provide true reef thicknesses but is deemed to be sufficient for this drilling
and the
programme. The plan below shows the initial drilling completed in relation to the
appropriate
total drilling plan.
calibration of
any
measurement
tools or
systems used.
Aspects of the
determination of
mineralisation that are
Material to the Public
Report. In cases where
‘industry standard’ work
has been done this
would be relatively
simple (e.g. ‘reverse
circulation drilling was
The RC drilling samples were taken in 1 m intervals. The entire drillhole was
used to obtain 1 m
sampled. Each sample was weighted and then quartered by means of a riffle
samples from which 3
splitter to collect a sample, which is stored at the Sabie core yard for future
kg was pulverised to
testwork if required. This sample is between 2 kg and 6 kg in weight.
produce a 30 g charge
for fire assay’). In other
Another 2 kg sample is collected for analysis at the accredited laboratory. The 2 kg
cases more explanation
sample is used to produce a 50 g aliquot for the fire assay.
may be required, such
as where there is
coarse gold that has
inherent sampling
problems. Unusual
commodities or
mineralisation types
(e.g. submarine
nodules) may warrant
disclosure of detailed
information.
Drill type (e.g. core,
reverse circulation,
open-hole hammer,
rotary air blast, auger,
Torque Africa Exploration (Pty) Ltd is doing the reverse circulation (RC) drilling on
Bangka, sonic, etc.)
site using a track-mounted and a 6x6 truck mounted Thor drilling machines with
and details (e.g. core
cyclone.
diameter, triple or
RC drilling was utilised during the initial drilling phase. The drillhole was not
standard tube, depth
surveyed down the hole as maximum depth of the drilling is 132 m. The collar
of diamond tails, facepositions were initially determined with a Garmin 78s handheld GPS, and finalised
sampling bit or other
with a Trimble differential GPS survey.
type, whether core is
oriented and if so, by
what method, etc.).
The RC chips were weighed before splitting and compared to an estimated weight
for the 1 m sample if there was 100% recovery in the dolomites. A density of 2.84
Method of recording
3
t/m was used for the dolomite in the weight estimate.
and assessing core
and chip sample
Owing to the natural cavities occurring in the dolomites, the recoveries were
recoveries and results
monitored to note the natural cavities or, possibly, an area of historical mining. This
assessed.
was crucial as one of the aims of the drilling programme was to test for the extent
of historical mining stopes.
The RC rock chips were collected via a cyclone directly into a sample bag in order
Measures taken to
to collect the maximum sample. Care was taken by the drillers to drill slower
maximise sample
through areas which had bad ground conditions.
recovery and ensure
representative nature
In order to ensure the representative nature of the drilled intersections and due to
of the samples.
the dip of the reef being very shallow at around 3° to 9° to the west, drillholes were
drilled vertically in order to obtain an intersection as close to normal as possible.
Whether a relationship
exists between sample
recovery and grade
Sample recovery versus grade has not been assessed to date. However, it has
and whether sample
been noted that grade has been observed in higher and lower chip recovery
bias may have
samples. Further diamond drilling will assist in this respect.
occurred due to
preferential loss/gain
of fine/coarse material.
Whether core and chip
samples have been
All drilled and completed drillholes have been geologically logged in field on the
geologically and
drilling site. Geological logging of rock chips is done “on the go” as soon as sample
geotechnically logged
bags containing rock chips are obtained from the drillers. Geological logging is
13
Criteria
Explanation
to a level of detail to
support appropriate
Mineral Resource
estimation, mining
studies and
metallurgical studies.
SECTION 1: SAMPLING TECHNIQUES AND DATA
Detail
done on a standard log sheet in the field and the data is captured on computer onto
an MS Excel spreadsheet. Using a sieve, the geologist scoops a portion of the
sample and cleans it in a bucket of water until the rock chips are free of dust, mud
or clay. The geologist uses a hand lens to check the lithology types and alteration
and mineralisation such as pyrite, arsenopyrite, chalcopyrite, sericite etc. All
identified minerals, alterations and lithologies are then captured onto a geological
log sheet for the particular drillhole. The cleaned rock chips are then put in a
sample-chip tray in order of drill depths.
Whether logging is
qualitative or
quantitative in nature.
Core (or costean,
channel, etc.)
photography.
Initial geotechnical logging or studies have been completed at this stage.
The rock chip logging is both qualitative and quantitative. The drillhole logs are
TM
captured in StudioEM for electronic logs and the rock chips are stored in chip
trays and stored at the Sabie core yard as well as photographed for electronic
filing.
Project to date 284 RC boreholes have been completed totalling 11,483 metres,
The total length and
and all the rock chips have been logged and sampled.
percentage of the relevant
intersections logged.
Subsampling
techniques
and
sample
preparation
If core, whether cut or
sawn and whether
quarter, half or all core
taken.
If non-core, whether
riffled, tube sampled,
rotary split, etc. and
whether sampled wet
or dry.
For all sample types,
the nature, quality and
appropriateness of the
sample preparation
technique.
Quality control
procedures adopted
for all sub-sampling
stages to maximise
representivity of
samples.
Measures taken to
ensure that the
sampling is
representative of the in
situ material collected,
including for instance
results for field
duplicate/second-half
sampling.
Whether sample sizes
are appropriate to the
grain size of the
material being
sampled.
The nature, quality and
appropriateness of the
assaying and
laboratory procedures
used and whether the
technique is
considered partial or
total.
Quality of
assay data
and
laboratory
tests
Project to date 18 Diamond core boreholes have been completed, totalling 485
metres. The core was largely broken, and sampling consisted of either split
recovered broken core or split by diamond saw.
The 1 m samples were collected via a cyclone and the total sample was collected.
The sample was quartered by means of a riffle splitter and one quarter was kept for
achieving purposes at the Sabie core yard. The remaining sample was then split
further until a sample of approximately 2 kg was collected for assay purposes. Th
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