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Mittwoch, 01.08.2018 13:05 von | Aufrufe: 97

Tinka drills 7.2 metres grading 22.7% zinc and 5.7 metres grading 14.9% zinc at Ayawilca

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PR Newswire

VANCOUVER, Aug. 1, 2018 /PRNewswire/ - Tinka Resources Limited ("Tinka" or the "Company") (TSXV & BVL: TK) (OTCPK: TKRFF) is pleased to announce assay results for eight step-out drill holes from the West, Central, Camp and East Ayawilca areas in the Company's ongoing resource drill program at the Ayawilca project, Peru. In addition, one infill hole at South Ayawilca is reported.

Key highlights include:

  • Two high-grade zinc intersections at the newly named Camp area (holes A18-130 & 134) in the 'gap' between West and Central Ayawilca include 5.7 metres grading 14.9% zinc. This intercept occurs within a repeated limestone unit underneath phyllite
  • At West Ayawilca, two follow-up holes to hole A18-129 (10.4 metres at 44.0% zinc, see press release dated June 26, 2018) have also intersected high-grade zinc mineralization beneath the known zinc resource. Zinc-rich veins hosted by phyllite in hole A18-132 (including *6.9 metres grading 20% zinc) are believed to be feeder structures which have tapped the source for the zinc mineralization and provide further potential for additional mineralization at depth;
  • A positive infill hole at South Ayawilca (A18-133) confirms high-grade zinc replacement mineralization hosted by limestone and sandstone. This hole has improved the geological model in that area.

Drill Highlights

West Ayawilca

Hole A18-132:

  • 6.8 metres at 12.5% zinc, 28 g/t silver & 57 g/t indium from 120.0 metres depth; and
  • 10.5 metres at 14.0% zinc, 15 g/t silver & 207 g/t indium from 259.6 metres depth; and
  • *6.9 metres at 20.0% zinc, 0.4% lead, 60 g/t silver & 477 g/t indium from 320.0 metres depth.

Hole A18-135:

  • 12.1 metres at 7.1% zinc, 6 g/t silver & 88 g/t indium from 274.9 metres depth, including
    1.8 metres at 15.6% zinc, 14 g/t silver & 367 g/t indium from 285.2 metres depth; and
  • *0.6 metres at 24.8% zinc, 131 g/t silver & 153 g/t indium from 422.3 metres depth.

Camp


ARIVA.DE Börsen-Geflüster

Kurse

0,085
0,00%
Tinka Resources Chart

Hole A18-130:

  • 34.0 metres at 6.1% zinc, 4 g/t silver & 129 g/t indium from 294.0 metres depth, including
    7.7 metres at 10.3% zinc, 4 g/t silver & 215 g/t indium from 300.3 metres depth;

Hole A18-134:

  • 2.0 metres at 10.1% zinc, 4 g/t silver & 47 g/t indium from 242.0 metres depth; and
  • 5.7 metres at 14.9% zinc, 13 g/t silver & 206 g/t indium from 346.4 metres depth.

South Ayawilca

Hole A18-133 (infill hole):

  • 7.2 metres at 22.7% zinc, 28 g/t silver & 612 g/t indium from 140.0 metres depth; and
  • 27.0 metres at 6.0% zinc, 0.2% lead, 11 g/t silver & 47 g/t indium from 187.0 metres depth; and
  • 38.5 metres at 5.6% zinc, 0.1% lead, 12 g/t silver & 138 g/t indium from 248.8 metres depth.

Note: All intercepts shown above are down-hole intercepts. True thicknesses of the zinc intersections are estimated to be at least 85% of the downhole thicknesses, except for vein intercepts (marked). For vein intercepts marked * true thicknesses are undetermined.

Dr. Graham Carman, Tinka´s President and CEO, stated: "Tinka continues to expand the footprint of the zinc mineralization at Ayawilca with its 2018 step-out drill program. The new high-grade zinc intersections in the Camp area, where we carried out very limited drilling in the past, should allow us to connect the plus 200 metre gap between mineral resources at West and Central Ayawilca (refer to Figure 2). Of particular interest is that high grade zinc mineralization in this area was encountered within a repeated limestone under a phyllite 'ledge', a setting similar to that found in hole A18-129 which intersected exceptional +40% zinc grades. The repeated and mineralized limestone occurs in multiple locations at the project including at the Camp and West Ayawilca (refer to Figure 3). It is possible this deeper mineralization is more widespread than is currently recognized, as holes at the project in the past were typically stopped almost immediately on hitting phyllite."

"The main focus for our exploration in coming weeks is to test the repetition for mineralized limestones at West and Central Ayawilca and to test for extensions to the mineralization along strike at South and Central Ayawilca. In appears that number of previous holes at West and Central Ayawilca were not drilled sufficiently deep enough to test for these possible repetitions.  Tinka is studying which are the priority holes to deepen for later in the 2018 drill program."

"At West Ayawilca, high-grade zinc intercepts beneath the existing resource in holes A18-132 and 135 are interpreted as feeder veins for the high-grade replacement style mineralization intersected recently in hole A18-129 (refer to Figure 4). Results for several additional follow-up holes are pending." 

"Several infill holes are underway to further improve the geological model of the deposit and to target mineralization underneath the existing resources. The first infill hole drilled at South Ayawilca (A18-133) was positive, intersecting high-grade mineralization starting at a relatively shallow depth of 140 metres within the sandstones."

"Three drill rigs continue to operate at the project 24/7 (currently drilling holes A18-143, 144 & 145). So far in 2018 approximately 15,000 metres have been drilled, with a minimum of 5,000 additional metres planned for this year."

Figure 1 is a geological map of the project with inset of recent drill area. 
Figure 2 is a drill hole location map showing the recent holes at West, South, Camp and Vetas areas. 
Figure 3 is a schematic cross section through West and South Ayawilca.
Figure 4 is a schematic cross section through West Ayawilca highlighting 2018 drill holes.

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).


Notes:

1

US$55/t NSR cut off was used. Metal price assumptions were US$1.15/lb Zn, US$300/kg In, US$18/oz Ag, US$1.10/lb Pb.  Metal recovery
assumptions were 90% Zn, 75% In, 60% Ag, and 75% Pb for the ZnEq calculation.

2

The NSR value was calculated using the formula: NSR = Zn(%)*US$15.34+Pb(%)*US$6.15+In(g/t)*US$0.18+Ag(g/t)*US$0.27

3

The ZnEq value was calculated using the formula: ZnEq = NSR/US$15.34

4

Numbers may not add due to rounding

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. Recent significant drill intercepts at Ayawilca











Drill hole

From m

To m

Interval
m

Zn %

Pb %

Ag g/t

Indium g/t

Area

Comment

A18-123

238.50

239.50

1.00

5.6

7.8

152

0

East

Step-out

and

451.30

452.20

0.90

5.3

0.0

4

64



A18-124

212.00

214.00

2.00

3.0

4.0

118

4

Central

Step-out

and

266.00

268.00

2.00

4.3

0.0

6

4



A18-125

results awaited






Zone 3

Step-out

A18-128

330.60

332.40

1.80

3.9

0.2

7

17

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