VANCOUVER, BC / ACCESSWIRE / March 6, 2023 / Tinka Resources Limited ("Tinka" or the "Company") (TSXV:TK)(BVL:TK)(OTCQB:TKRFF) is pleased to announce results for six recent drill holes from the Company's ongoing infill and resource expansion drill program at the Ayawilca project in Peru. All six drill holes are infill holes from the South Ayawilca area. Hole A23-212 returned much better than expected results with a thick and high-grade zinc intersection of 145.2 metres grading 10.9% zinc(estimated true thickness of ~ 100 metres)including 29.3 metres grading 20.2% zinc from a shallow depth of 158 metres. The drill program at South Ayawilca continues to exceed our expectations with respect to the continuity of the ultra high zinc grades. Drilling is expected to continue with two rigs until the end of April.
Key highlights of recent South Ayawilca drill holes
Hole A23-212:
145.2 metres at 10.9% zinc from 158.2 metres depth, including:
29.3 metres at 20.2% zinc from 158.2 metres depth, and
10.6 metres at 14.9% zinc from 200.8 metres depth, and
9.8 metres at 15.1% zinc from 239.1 metres depth, and
3.6 metres at 35.0% zinc from 262.6 metres depth, and
25.8 metres at 13.1% zinc from 277.6 metres depth.
The wide interval includes 4.4 metres of no recovery assumed zero grade in three separate zones.
Hole A22-208:
4.6 metres at 32.4% zinc from 105.2 metres depth; and
9.9 metres at 9.7% zinc from 142.1 metres depth; and
71.2 metres at 8.8% zinc from 168.8 metres depth, including:
37.7 metres at 12.8% zinc from 194.0 metres depth, including
2.7 metres at 45.2% zinc from 188.0 metres depth, and
20.0 metres at 16.9% zinc from 211.9 metres depth; and
1.7 metres at 36.3% zinc from 265.9 metres depth.
Hole A22-206:
37.8 metres at 10.5% zinc from 153.5 metres depth, including:
23.4 metres at 15.2% zinc from 168.0 metres depth; and
2.7 metres at 45.2% zinc from 188.0 metres depth and 1.7 metres at 15.9% zinc from 200.3 metres.
Hole A23-215:
5.2 metres at 11.2% zinc from 144.4 metres depth; and
4.1 metres at 33.6% zinc from 190.0 metres depth; and
30.1 metres at 8.6% zinc from 263.4 metres depth, including
5.6 metres at 21.3% zinc from 264.5 metres depth.
Hole A22-210: 2.7 metres at 16.2% zinc from 85.6 metres depth.
Hole A22-201: An extension of hole A17-066 (extended by 59 m) did not intersect significant mineralization.
A total of 10,000 metres have now been drilled for 30 drill holes in the 2022-23 drill program with a further 1,000 metres (approximately) to be completed. Seven holes have results pending.
True thicknesses of the mineralized intercepts are estimated to be at least 70% of the downhole thicknesses.
Dr. Graham Carman, Tinka's President and CEO, stated: "Hole A23-212 is without doubt Tinka's best ever hole at Ayawilca in terms of thickness and grade of the zinc mineralization - the hole intercepted a continuous zone of massive sulphide mineralization grading 11% zinc over an interpreted true thickness of approximately 100 metres. This hole is one of five fan holes reported here, following-up on the spectacular high-grade intercept of 39 metres grading 20% zinc including 10.4 metres at 42% zinc in hole A22-202 (link to news release). The results of these fan holes prove that there is excellent continuity of the high-grade zinc mineralization along a 200-metre strike length of folded limestone at the western extremity of the South Ayawilca deposit. This ultra high-grade zinc zone, which we are continuing to define and extend with more drilling, is expected to be very important for the project as it is located at the shallowest part of the South Ayawilca resource and therefore likely to be accessed early in the mine plan."
"Importantly, exploration opportunities still exist to expand this ultra high-grade mineralization. The drill program will continue until April with at least two more holes to be drilled at South Ayawilca. Several additional holes remain to be reported including five holes from West Ayawilca. Next steps for the project, following completion of the drill program, include an update of the mineral resource estimations and the evaluation of alternatives to fast track Ayawilca towards development."
Discussion of the geology
Table 1 summarises the highlighted drill intercepts for the six drill holes from South Ayawilca in this news release. The Company has now completed approximately 10,000 metres of drilling in 30 holes in the 2022-2023 resource definition-expansion program (see Table 2). A total of 23 holes have now been reported (see also previous releases Oct 11 2022 , Nov 21 2022 , Jan 9 2023 and Jan 24 2023. Table 2 summarises the complete list of holes drilled in the 2022-23 drill program. A drill hole map is presented in Figure 1.
This news release includes five holes drilled in a fan pattern from the same platform (holes A22-206, 208, 210, A23-212 and 215) targeting the core of an overturned fold ‘anticline' covering approximately 200 metres of strike length (north-south). An impermeable quartz sandstone, a unit of the local Goyllar formation, forms the footwall to the massive sulphide zone which has replaced the favourable Pucara limestone in the core of the anticline with substantial quantities of zinc. The sandstone is folded around the Pucara limestone forming an efficient trap which has concentrated the zinc mineralization in the hinge of the fold and along the contacts with the sandstone. High-grade zinc is associated with semi-massive sulphide (30-70% sulphides) to massive sulphide (70-100% sulphides) mineralization as sulphide replacements of the limestone and as veins into the sandstone. The sulphides are dominated by sphalerite, pyrite, and iron-rich carbonates (siderite) with minor magnetite, pyrrhotite, and quartz. Sphalerite (both high and low-iron varieties) typically comprises between 30% and 90% of the total sulphides.
An interpretation of the zinc mineralization in the recent drill holes is highlighted in Figure 2. The massive sulphide body dips at a moderate angle to the east. A major northeast-southwest trending fault located at the northern edge of the sulphide body truncates the mineralization to the north. This "060 Fault" (shown in Figure 2) could also be an important conduit for the mineralization at Ayawilca.
Figure 3 is an example of the ultra high-grade zinc cores from A23-212.
The final hole reported in this news release, A22-201, is a deepened exploration hole from 2017 (A17-077) to 430 m depth, targeting the possible extension of high-grade zinc mineralization intersected in nearby hole A22-195 (6m at 18.8% Zn from 392.6m depth) on the eastern side of South Ayawilca (see link). On this occasion, A22-201 did not intersect any significant mineralization possibly as a result of the thinning out of the manto structure in A22-195.
Table 1. Summary of drill hole results in this release from South Ayawilca
Hole
From (m)
To (m)
Interval (m)
Zinc %
Lead %
Silver g/t
Indium ppm
Notes
A22-201
no significant results
Extension of hole A17-066
A22-206
153.55
191.35
37.80
10.54
0.06
17
181
incl
168.00
191.35
23.35
15.23
0.07
22
284
incl
188.00
190.65
2.65
45.21
0.14
76
1730
and
200.30
202.00
1.70
15.92
0.02
9
187
A22-208
105.20
109.75
4.55
32.39
0.04
32
354
and
125.40
127.25
1.85
17.33
0.04
15
87
and
142.15
152.00
9.85
9.74
0.19
20
97
and
168.80
240.00
71.20
8.75
0.51
33
55
incl
194.00
231.65
37.65
12.76
0.75
44
89
incl
211.70
231.65
19.95
16.92
0.01
6
87
and
265.90
267.55
1.65
36.30
0.15
88
2940
A22-210
85.60
88.30
2.70
16.22
0.39
92
216
and
157.20
164.20
7.00
4.39
0.45
79
4
A23-212
124.30
126.10
1.80
32.74
0.02
21
58
and
158.20
303.40
145.20
10.86
0.19
31
229
1
incl
158.20
187.45
29.25
20.17
0.04
21
418
incl
200.80
211.40
10.60
14.87
0.20
48
426
2
incl
239.10
248.85
9.75
15.14
0.04
19
244
incl
262.60
266.20
3.60
34.96
0.07
50
868
incl
277.60
303.40
25.80
13.06
0.61
86
312
3
A23-215
144.35
149.50
5.15
11.24
0.01
22
247
incl
144.35
145.45
1.10
31.46
0.03
32
811
and
190.00
194.10
4.10
33.59
0.19
72
1263
incl
190.70
192.80
2.10
42.82
0.34
118
1629
and
263.40
293.50
30.10
8.61
0.14
38
91
incl
264.50
270.10
5.60
21.34
0.06
36
451
incl
283.10
292.60
9.50
12.78
0.29
58
9
1
includes 4.4 m of no recovery assumed zero grade
2
includes 0.8 m of no recovery assumed zero grade
3
includes 3.6 m of no recovery assumed zero grade
Figure 1. Drill hole map of Ayawilca highlighting drill holes released here in RED
Figure 2.
Figure 3. An example of high-grade zinc mineralization in hole A23-212. The interval 205.5 - 208.5 metres has an average grade of 31.3% zinc, 90 g/t silver, and 0.13% lead.
Note on sampling and assaying
Drill holes are diamond HQ size core holes with recoveries generally above 80% and often close to 100%. The drill core is marked up, logged, and photographed on site. The cores are cut in half at the Company's core storage facility, with half-cores stored as a future reference. Half-core was bagged on average over 1 to 2 metre composite intervals and sent to SGS laboratory in Lima for assay in batches. Standards and blanks were inserted by Tinka into each batch prior to departure from the core storage facilities. At the laboratory samples are dried, crushed to 100% passing 2mm, then 500 grams pulverized for multi-element analysis by ICPMS using multi-acid digestion. Samples assaying over 1% zinc, lead, or copper and over 100 g/t silver were re-assayed using precise ore-grade AAS techniques. Samples within massive sulphide zones were also assayed for tin using fusion and AAS finish.
The Qualified Person, Dr. Graham Carman, Tinka's President and CEO, and a Fellow of the Australasian Institute of Mining and Metallurgy, has reviewed and verified the technical contents of this release.
Readers are encouraged to read the NI 43-101 Technical Report entitled "Ayawilca Polymetallic Project, Central Peru, NI 43-101 Technical Report on Updated Preliminary Economic Assessment" available for download on Tinka's website at www.tinkaresources.com. The Technical Report was prepared by Mining Plus Peru S.A.C. ("Mining Plus") as principal consultant, Transmin Metallurgical Consultants ("Transmin"), Envis E.I.R.L ("Envis"), and SLR Consulting (Canada) Ltd ("SLR").
Table 2. Drill hole details for 2022-2023 drill program including drill collar coordinate information
Drill hole
Easting
Northing
Elevation
Azimuth
Dip
Depth
Area
Comment
A22-190
333281
8845755
4167
180
-50
498.95
Central
Results reported
A22-191
333169
8845799
4182
180
-55
478.80
Central
Results reported
A22-192
333345
8845195
4208
232
-74
385.90
South
Results reported
A22-193
332766
8845659
4237
68
-65
365.40
West
Results reported
A22-194
333143
8845231
4226
135
-73
380.20
South
Results reported
A22-195
333149
8845353
4221
148
-65
426.90
South
Results reported
A22-196
333035
8845307
4235
174
-45
382.10
South
Results reported
A22-197
332912
8845693
4220
264
-55
412.60
West
Results reported
A22-198
332900
8845768
4222
265
-53
451.10
West
Results reported
A22-199
333046
8845067
4195
303
-66
344.10
South
Results reported
A22-200
332821
8845889
4246
260
-58
352.00
West
Results reported
A22-201
333342
8845195
4208
310
-73
58.90
South
Results HERE
A22-202
333046
8845066
4197
283
-52
270.15
South
Results reported
A22-203
332839
8845685
4228
264
-60
350.00
West
Results reported
A22-204
333090
8845061
4196
307
-60
334.30
South
Results reported
A22-205
332839
8845685
4227
244
-72
352.70
West
Results reported
A22-206
333044
8845064
4197
270
-58
217.30
South
Results HERE
A22-207
332710
8845883
4252
254
-74
332.00
West
Results reported
A22-208
333044
8845064
4197
270
-70
282.55
South
Results HERE
A22-209
332738
8845927
4251
257
-68
314.15
West
Results reported
A22-210
333047
8845065
4197
297
-48
259.80
South
Results HERE
A22-211
332785
8845707
4236
260
-75
295.00
West
Results pending
A23-212
333047
8845065
4197
228
-79
324.30
South
Results HERE
A23-213
332853
8845650
4225
258
-65
316.00
West
Results pending
A23-214
332710
8845883
4252
255
-67
287.10
West
Results pending
A23-215
333047
8845065
4197
180
-80
295.10
South
Results HERE
A23-216
332710
8845883
4252
220
-73
310.00
West
Results pending
A23-217
332853
8845650
4225
240
-78
300.00
West
Results pending
A23-218
333109
8845020
4190
330
-75
323.70
South
Results pending
A23-219
333219
8845582
4182
180
-85
336.80
Central
Results pending
TOTAL
10037.90
Notes: Datum for coordinates is WGS84 Zone 18S. Azimuth is true azimuth
On behalf of the Board,
"Graham Carman" Dr. Graham Carman, President & CEO
Tinka is an exploration and development company with its flagship property being the 100%-owned Ayawilca zinc-silver-tin project in central Peru. The Zinc Zone deposit has an estimated Indicated Mineral Resource of 19.0 Mt @ 7.15% Zn, 16.8 g/t Ag & 0.2% Pb and Inferred Mineral Resource of 47.9 Mt @ 5.4% Zn, 20.0 g/t Ag & 0.4% Pb (dated August 30, 2021). The Ayawilca Tin Zone has an estimated Inferred Mineral Resource of 8.4 Mt grading 1.0% Sn.
Forward Looking Statements: Certain information in this news release contains forward-looking statements and forward-looking information within the meaning of applicable securities laws (collectively "forward-looking statements"). All statements, other than statements of historical fact are forward-looking statements. Forward-looking statements are based on the beliefs and expectations of Tinka as well as assumptions made by and information currently available to Tinka's management. Such statements reflect the current risks, uncertainties and assumptions related to certain factors including, without limitations: timing of planned work programs and results varying from expectations; delay in obtaining results; changes in equity markets; uncertainties relating to the availability and costs of financing needed in the future; equipment failure, unexpected geological conditions; imprecision in resource estimates or metal recoveries; success of future development initiatives; competition and operating performance; environmental and safety risks; the Company's expectations regarding the Ayawilca Project PEA; the political environment in which the Company operates continuing to support the development and operation of mining projects; risks related to negative publicity with respect to the Company or the mining industry in general; the threat associated with outbreaks of viruses and infectious diseases, including the novel COVID-19 virus; delays in obtaining or failure to obtain necessary permits and approvals from local authorities; community agreements and relations; and, other development and operating risks. Should any one or more of these risks or uncertainties materialize, or should any underlying assumptions prove incorrect, actual results may vary materially from those described herein. Although Tinka believes that assumptions inherent in the forward-looking statements are reasonable, forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein. Except as may be required by applicable securities laws, Tinka disclaims any intent or obligation to update any forward-looking statement.
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