Tinka Reports High Zinc Recoveries in Metallurgical Tests from Ayawilca

VANCOUVER, June 5, 2019

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 (including 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 concentrates 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 Ayawilca 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   ARIVA.DE Börsen-Geflüster Kurse Tinka Resources 0,092 € 0,00%	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 South 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 textures that will be encountered at Ayawilca, and were spatially representative of the South and West Ayawilca zinc zones, and therefore representative 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). Composite 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 the tests.  The pyrrhotite mineralization at Ayawilca is a minor and discrete geometallurgical 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	Analyte	Unit	Detection Limit	AEC-02	AEC-03
Al	%	0.01	0.03	0.03	Sr	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 Werbung Mehr Nachrichten zur Tinka Resources Aktie kostenlos abonnieren E-Mail-Adresse Bitte überprüfe deine die E-Mail-Adresse. Benachrichtigungen von ARIVA.DE (Mit der Bestellung akzeptierst du die Datenschutzhinweise) -1 Vielen Dank, dass du dich für unseren Newsletter angemeldet hast. Du erhältst in Kürze eine E-Mail mit einem Aktivierungslink. Hinweis: ARIVA.DE veröffentlicht in dieser Rubrik Analysen, Kolumnen und Nachrichten aus verschiedenen Quellen. Die ARIVA.DE AG ist nicht verantwortlich für Inhalte, die erkennbar von Dritten in den „News“-Bereich dieser Webseite eingestellt worden sind, und macht sich diese nicht zu Eigen. Diese Inhalte sind insbesondere durch eine entsprechende „von“-Kennzeichnung unterhalb der Artikelüberschrift und/oder durch den Link „Um den vollständigen Artikel zu lesen, klicken Sie bitte hier.“ erkennbar; verantwortlich für diese Inhalte ist allein der genannte Dritte. Andere Nutzer interessierten sich auch für folgende News 24.04.24 - PR Newswire Oxford Instruments Plc - Holding(s) in Company 24.04.24 - PR Newswire Fidelity Special Values Plc - Monthly Factsheet 24.04.24 - PR Newswire Fidelity European Trust Plc - Monthly Factsheet Solarboom 2024:    5 Gründe die für diese Aktie sprechen… weiterlesen» Anzeige wo-site-teaser-box-16746_site-teaser-box_2024-04-24_08%253A00%253A00_2024-04-25_09%253A00%253A59