Tinka Reports High Zinc Recoveries IN Metallurgical Tests from Ayawilca
TINKA RESOURCES LIMITED
#1305 – 1090 WEST GEORGIA STREET
VANCOUVER, B.C. V6E 3V7
Tel: (604) 685 9316 Fax (604) 683 1585
Website: www.tinkaresources.com
TSXV & BVL: TK OTCPK: TKRFF
NEWS RELEASE June 5, 2019
TINKA REPORTS HIGH ZINC RECOVERIES IN METALLURGICAL TESTS FROM
AYAWILCA
Vancouver, Canada – Tinka Resources Limited (“Tinka” or the “ Company”) (TSXV & BVL: TK )
(OTCPK: TKRFF) is pleased to announce the results of metallurgical testwork on composite zinc sulfide
samples from the Company’s 100%- owned Ayawilca property in cent ral Peru. The metallurgical test
program was carried out by XPS Consulting and Testwork Services , Ontario, under the coordination of
Adam Johnston of Transmin Metallurgical Consultants.
Key Highlights
The objective of the testwork was to develop a flowsheet using standard flotation for the zinc
mineralization at West and South Ayawilca, which was successfully achieved.
Testwork results have demonstrated that recoveries of 92% zinc at a concentrate grade of 50% zinc
can be consistently achieved using a standard flotation process. Two locked cycle tests were carried
out on two different styles of mineralization and both tests produced similar zinc concentrates.
Potentially deleterious elements in the zinc concentrates (incl uding silica, manganese, cadmium,
mercury, and arsenic) were well below standard smelter penalty levels. A small penalty is
anticipated for iron content in the concentrate.
Indium in the two locked cycle zinc concentrates (719 ppm and 400 ppm, respectively) is very high
and potentially payable, subject to the smelter and commercial arrangements.
Details of the processing flowsheet for zinc and lead concentra tes will be incorporated into the
upcoming Preliminary Economic Assessment ("PEA"). The Company expects to release the results
of the PEA for the Ayawilca zinc project before the end of June 2019.
Dr. Graham Carman, Tinka’s President and CEO, stated: “We are very pleased with the results of the
metallurgical testwork, which has been completed to a high standard, as it predicts very high zinc recoveries
from the mineralization at Ayawilca. We believe the Ay awilca zinc concentrate will be desirable for many
smelters due to the low levels of silica, manganese and other deleterious elements, as well as for the high
indium levels. We look forward to completing our PEA before the end of June 2019. As the project
progresses, we will continue to seek improvements in the zinc and lead metallurgy with additional testwork.”
Table 1 highlights final grades and recoveries of two locked cycle flotation tests (AEC-02 and AEC-03) and
a batch test (AEC-05) on drill core composite samples from West and South Ayawilca.
Table 1 – Summary of Ayawilca Flotation Test Results
Composite
Test Type Assays (% Zn) Recovery (% Zn)
Feed Concentrate
AEC-02 Locked cycle 10.8 50.9 92.5
AEC-03 Locked cycle 10.2 50.5 94.1
AEC-05 Batch cleaner 6.5 52.1 90.7
Methodology
A flotation development program was conducted to determine best conditions for high zinc recovery to a
high quality zinc concentrate. The program focused on the Sout h and West Ayawilca areas, which host
approximately 50% of the resource and most of the higher grade zinc zones that would be mined in the early
years. While the resulting composites were higher grade than the average diluted mining grades, it is believed
that the samples were representative of the different mineral t extures that will be encountered at Ayawilca,
and were spatially representative of the South and West Ayawilc a zinc zones, and therefore representative
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with respect to flotation performance. The results were used to develop the proposed flowsheet and reagent
scheme that will be discussed in more detail in the upcoming PEA.
Detail of Sample Composites
Composite AEC-02 was comprised of 11 quarter core samples from 11 drill holes at West and South
Ayawilca (91.6 m sampled). Comp osite AEC-02 had relatively high Zn/S ratios (i.e., low pyrite
content) and relatively coarse-grained sphalerite textures.
Composite AEC-03 was comprised of 17 quarter core samples (all different to AEC-02) from 15
drill holes at West and South Ayawilca (129.7 m sampled). Composite AEC-03 had relatively low
Zn/S ratios (i.e., high pyrite content) and finer grained sphalerite textures.
Composite AEC-05 was comprised of 4 quarter core samples (all used in AEC-03) from 4 drill holes
at West and South Ayawilca (39.5 m sampled). Composite AEC-05 had relatively low Zn/S ratios
(i.e., high pyrite content) and relatively fine grained sphalerite textures.
Two high pyrrhotite quarter core samples were not included in t h e t e s t s . T h e p y r r h o t i t e
mineralization at Ayawilca is a minor and discrete geometallurg ical domain that will be studied in
future flotation development phases.
Detailed assays of the two locked cycle concentrates are presented in Table 2.
Table 2 – Detailed Analyses of Locked Cycle Concentrates AEC-02 and AEC-03 from Ayawilca
Analyte Unit
Detection
Limit AEC-02 AEC-03 Anal yte Unit
Detection
Limit AEC-02 AEC-03
Al % 0.01 0.03 0.03 S r ppm 3 16 21
As ppm 5 319 242 Ta ppm 0.2 < 0.2 < 0.2
B ppm 10 < 10 < 10 Tb ppm 0.1 < 0.1 < 0.1
Ba ppm 3 4 4 Te ppm 6 < 6 < 6
Be ppm 3 < 3 < 3 Th ppm 0.1 0.2 0.1
Bi ppm 2 26 22 Ti % 0.01 < 0.01 < 0.01
Ca % 0.01 0.05 0.05 Tl ppm 0.1 1.5 2.7
Cd ppm 2 1800 1650 Tm ppm 0.1 < 0.1 < 0.1
Ce ppm 0.8 0.9 < 0.8 U ppm 0.1 1.1 1.2
Co ppm 0.2 8.5 11 V ppm 5 < 5 < 5
Cr ppm 30 90 90 W ppm 0.7 1.1 0.8
Cs ppm 0.1 1 0.9 Y ppm 0.1 1 0.9
Cu ppm 2 2280 1880 Yb ppm 0.1 < 0.1 < 0.1
Dy ppm 0.3 < 0.3 < 0.3 Zn % 0.01 50.9 50.5
Er ppm 0.1 < 0.1 < 0.1 Au ppb 2 60 21
Eu ppm 0.1 0.1 < 0.1 Pd ppb 5 < 5 < 5
Fe % 0.05 13.1 14 Pt ppb 5 < 5 11
Ga ppm 0.2 11.7 10.6 Ag ppm 3 52 51
Gd ppm 0.1 0.1 0.1 H g ppb 5 4570 4510
Ge ppm 0.7 0.9 1.5 C-Total % 0.01 0.15 0.21
Ho ppm 0.2 < 0.2 < 0.2 S-Total % 0.01 33.9 34.1
Hf ppm 10 < 10 < 10 Co3O4 % 0.005 < 0.005 < 0.005
In ppm 0.2 719 399 CuO % 0.005 0.303 0.253
K % 0.1 < 0.1 < 0.1 NiO % 0.003 0.008 0.006
La ppm 0.4 0.5 < 0.4 SiO2 % 0.01 0.74 0.46
Li ppm 3 24 24 Al2O3 % 0.01 0.08 0.1
Mg % 0.01 0.16 0.1 Fe2O3(T) % 0.01 16.94 18.32
Mn ppm 3 1190 1700 MnO % 0.001 0.144 0.206
Mo ppm 1 5 5 M gO % 0.01 < 0.01 < 0.01
Nb ppm 2.4 < 2.4 < 2.4 CaO % 0.01 < 0.01 < 0.01
Nd ppm 0.4 < 0.4 0.4 Na2O % 0.01 < 0.01 < 0.01
Ni ppm 10 20 10 K2O % 0.01 0.01 0.01
Pb ppm 0.8 821 4830 TiO2 % 0.01 0.01 0.01
Pr ppm 0.1 0.1 0.1 P2O5 % 0.01 0.01 0.01
Rb ppm 0.4 0.7 0.4 Cr2O3 % 0.01 0.01 0.01
Sb ppm 2 25 34 V2O5 % 0.003 < 0.003 < 0.003
Se ppm 0.8 2.6 2.4 Cl % 0.01 0.03 0.02
Si % 0.01 0.39 0.26 F % 0.01 0.02 0.01
Sm ppm 0.1 0.1 0.2 CO3 (calc) % 0.01 0.25 0.59
Sn ppm 0.5 378 413 LOI % 15.26 15.52
Notes to Table 2. Assays were carried out by Activation Laboratories, Ancaster, Ontario
Elements (except precious metals, zinc) were analysed using peroxide fusion, ICP-OES and ICP-MS.
Zinc was analysed by peroxide fusion and ICP-OES.
Precious metals (Au, Pd, Pt, Ag) were analysed with fire assay and ICP-OES finish.
Hg was analysed by cold vapour FIMS.
C-Total and S-Total were analysed by infra-red techniques.
Oxides were analysed by whole rock analysis XRF.
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Qualified Person
The results of the metallurgical tests have been reviewed and v erified by Mr Adam Johnston, FAusIMM,
CP (Metallurgy) of Transmin Metallurgical Consultants, Lima, a qualified person as defined by National
Instrument 43-101. Mr Johnston ha s 25 years of mineral processi ng experience and is a Fellow of the
Australasian Institute of Mining and Metallurgy.
Dr. Graham Carman, Tinka’s President and CEO, reviewed, verified and compiled the technical contents of
this release. Dr Carman is a Fellow of the Australasian Institute of Mining and Metallurgy, and is a qualified
person as defined by National Instrument 43-101.
About Tinka Resources Limited
Tinka is an exploration and development company with its flagsh ip property being the 100%-owned
Ayawilca carbonate replacement deposit (CRD) in the zinc-lead-s ilver belt of central Peru, 200 kilometres
northeast of Lima. The Ayawilca Zinc Zone contains 11.7 Mt of I ndicated Resources grading 6.9% zinc,
0.2% lead, 15 g/t silver and 84 g/t indium and 45.0 Mt Inferred Resources grading 5.6% zinc, 0.2% lead, 17
g/t silver and 67 g/t indium. The Ayawilca Tin Zone contains a n Inferred Mineral Resource of 14.5 Mt at
0.63% tin, 0.21% copper & 18 g/t silver (November 26, 2018 release). A PEA is underway with results
anticipated by end of Q2 2019.
On behalf of the Board,
“Graham Carman”
Dr. Graham Carman, President & CEO
Investor Information:
www.tinkaresources.com
Rob Bruggeman 1.416.884.3556
Company Contact:
Mariana Bermudez 1.604.699.0202
Forward Looking Statements: Certain information in this news release contains forward-looking statements and forward-looking
information within the meaning of applicable securities laws (c ollectively "forward-looking statements"). All statements, other
t h a n s t a t e m e n t s o f h i s t o r i c a l f a c t a r e f o r w a r d - l o o k i n g s t a t e m e nts. 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 relate d to certain factors including, without limitations, drilling r esults, the
Company’s expectations regarding the Ayawilca Project PEA, capi tal and other costs varying significantly from estimates,
production rates varying from estimates, changes in world metal markets, 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 in itiatives, competition, operating performance, environmental an d
safety risks, delays in obtaining or failure to obtain necessar y permits and approvals from local authorities, community agree ments
and relations, and other development and operating risks. Shoul d 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 ther ein.
Except as may be required by applicable securities laws, Tinka disclaims any intent or obligati on to update any forward-lookin g
statement.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture
Exchange) accepts responsibility for the adequacy or accuracy of this news release