Tinka Drills 32 Metres Grading 9.6 % Zinc Within a Wider Interval of 107 Metres Grading 6.8 % Zinc in Ayawilca Step-out Hole

• 6.5 metres at 2.7 % zinc, 2.0 % lead & 77 g/t silver from 376.6 metres depth, and
• 11.2 metres at 5.3 % zinc & 83 g/t indium from 451.5 metres depth.

Hole A18-113:

• 20.3 metres at 1.26 % tin & 0.30% copper from 658.0 metres depth, including
• 7.9 metres at 2.39 % tin & 0.64 % copper from 664.1 metres depth.

Hole A18-110:

• 12.0 metres at 0.87 % tin & 0.43% copper from 525.0 metres depth, including
• 1.45 metres at 5.93 % tin & 0.33 % copper from 525.0 metres depth.

Dr. Graham Carman, Tinka´s President and CEO, stated: "Tinka is targeting high-grade zinc mineralization outside of the existing resource boundaries in the 2018 step-out drill program, and we are very pleased to report results for hole A18-118, one of the best mineralized holes from West Ayawilca.  Importantly, our geological model has successfully predicted zinc mineralization is concentrated close to the hinge of an 'anticline' fold within limestone beneath sandstone cover, and this mineralization remains open. At West Ayawilca more holes are planned to target the projections of the fold hinge and its flat-lying eastern limb.  The steep-dipping western fold limb, tested by A18-115 & 116, appears to host vein-style mineralization in the overlying sandstone only."

"We continue to target possible connections between the resource areas at West and Central Ayawilca, and several holes have results pending.  The Zone 3 area is also beginning to show encouraging zinc intersections (e.g., hole A18-119), and although the mineralization is relatively deep, we believe Zone 3 has the potential to add significant new resources to the project.  High-grade tin mineralization in A18-119, more than 2 kilometres away from West Ayawilca, further indicates the potential and very large size of the Ayawilca mineralized system."

Figure 1 shows a drill hole location map of the Ayawilca project.  Figures 2 and 3 are interpretive cross sections through the Ayawilca project highlighting new results.

West Ayawilca Geology – Discussion

Three geological rock units are observed in all areas at Ayawilca: an upper sandstone, a middle limestone which hosts most of the sulphide zinc mineralization, and a lower phyllite.  The main geological feature of West Ayawilca is an 'anticline' fold which has a flat-lying eastern limb and a steep-dipping western limb.  The hinge of this fold and the flat-lying eastern side of the fold are prospective for zinc and hosts massive sulphide zinc mineralization at West Ayawilca and South Ayawilca up to ~200 metres in vertical thickness, typically in the form of tabular sulphide bodies or "mantos", and more irregular shaped 'chimneys'.  At these areas, most if not all of the limestone is completely replaced by massive sulphide mineralization (see Figures 2 and 3). Magnetite replacement of limestone predates the sulphide zinc mineralization and typically, as magnetite increases in the drill cores the quantity of sphalerite decreases.   

The ultimate source or 'feeder' of the zinc mineralization remains uncertain, but Tinka geologists believe the zinc mineralization was brought into the limestone via steep northeast-trending faults that transect the Ayawilca property (not shown in Figure 2 & 3). 

Zone 3 Geology – Discussion

The main geological feature at Zone 3 is an overturned 'syncline' which has folded the sequence into a 'V' and resulted in limestone outcropping at surface on the eastern fold limb (Figure 3).  Limestone in hole A18-119 at Zone 3 has been heavily replaced by magnetite, and to a lesser extent pyrite and sphalerite. As at West Ayawilca, Tinka geologists believe that the strongest zinc mineralization is likely to occur around the edges of the magnetite bodies.

Massive pyrite replacement at the base of the limestone hosts significant tin mineralization (e.g., A18-113 & A18-110).  The pyrite mineralization postdates and replaces massive pyrrhotite replacement bodies, which hosts tin mineralization elsewhere at the base of the limestone especially at Central Ayawilca (see Figure 3). At Zone 3 and elsewhere, the zinc and tin are completely different styles of mineralization and are physically separated. 

Massive sulphide and magnetite replacement at Zone 3 appears to be hosted close to the hinge of the overturned syncline near the Chaucha Fault, with zinc and lead rich mineralization extending into the overlying sandstone (Figure 3). Tinka geologists believe that the magnetite-pyrite/pyrrhotite zonation seen in Zone 3 may be similar to West and Central Ayawilca, with a tin-rich core and zinc-rich margins, particularly near fault intersections.

Summary of Ayawilca Inferred Zinc Zone Mineral Resources (Nov' 8, 2017)
South Ayawilca:          13.3 million tonnes at 9.5 % ZnEq (7.6 % zinc, 0.2 % lead, 25 g/t silver & 118 g/t indium);
West Ayawilca:             9.0 million tonnes at 7.2 % ZnEq (6.1 % zinc, 0.2 % lead, 14 g/t silver & 64 g/t indium);
Central Ayawilca:        13.0 million tonnes at 5.7 % ZnEq (4.7 % zinc, 0.3 % lead, 13 g/t silver & 54 g/t indium);
East Ayawilca:             7.5 million tonnes at 6.2 % ZnEq (5.1 % zinc, 0.2 % lead, 13 g/t silver & 69 g/t indium);
TOTAL:                      42.7 million tonnes at 7.3 % ZnEq (6.0 % zinc, 0.2 % lead, 17 g/t silver & 79 g/t indium).

Qualified Person – Mineral Resources:| The Mineral Resources disclosed in this press release have been estimated by Mr. David Ross, P.Geo., an employee of Roscoe Postle Associates Inc. (RPA), and is independent of Tinka.  By virtue of his education and relevant experience, Mr. Ross is a "Qualified Person" for the purpose of National Instrument 43-101. The Mineral Resources have been classified in accordance with CIM Definition Standards for Mineral Resources and Mineral Reserves (May, 2014).  An independent National Instrument 43-101 Technical Report (the "NI 43-101 Technical Report") on the Mineral Resource Estimate for the Ayawilca Property, Department of Pasco, Peru has been filed under the Company's profile on SEDAR at www.sedar.com and is available on the Company's website at www.tinkaresources.com

True thicknesses of the zinc intersections are estimated to be at least 85% of the downhole thickness, except where marked.  Significant new drill intercepts are summarized in Table 1 with the strongest intercepts in bold text. Table 2 summarizes the drill collar information for the recent holes. 

Table 1. Significant drill intercepts at Ayawilca in 2018

Drill hole	From m	To m	Interval m	Zn %	Pb %	Ag g/t	Indium g/t	Tin %	Copper %	Area	Reported
A18-110	278.20	282.00	3.80	3.7	0.3	7	0			Zone 3	April 25'18
and	322.60	326.00	3.40	4.8	0.0	4	48			Zone 3	April 25'18
and	329.90	342.00	12.10	4.9	0.0	8	60			Zone 3	April 25'18
and	436.00	442.00	6.00	5.6	0.0	4	50			Zone 3	Feb 15'18
including	438.90	439.60	0.70	14.7 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 09:10 - PR Newswire Oscillate Plc - Holding(s) in Company 02:00 - PR Newswire Moonpig Group Plc - Notice of Results 23.04.24 - ARIVA.DE Redaktion Nebenwerte: SDAX heute leicht im Plus (14.236 Pkt.) 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