Inicio Minería Tinka Resources avanza con perforaciones en Colquipucro (Inglés)

Tinka Resources avanza con perforaciones en Colquipucro (Inglés)

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Andrew Carter con equipo de campo en Colquipucro
Andrew Carter con equipo de campo en Colquipucro

Tinka Announces Results Of 1,600 Metre Ten-Hole Drill Program At Colquipucro Silver Oxide Project

Vancouver, Canada — Tinka Resources Limited (“Tinka” or the “Company“) (TSXV: TK) (OTCPK: TKRFF) is pleased to announce assay results of a ten hole, 1600-metre drill program at its 100%-owned Colquipucro silver project in central Peru. Seven of the holes (CDD39 to CDD45) were infill holes drilled on two section lines spaced 100 metres apart within the existing silver resource (32 million ounces inferred silver oxide resource reported on April 9, 2014.). All seven holes intersected strong, near-surface, oxidized, silver mineralization over substantial thicknesses. Three other holes (CDD36 – CDD38) were step-out holes testing the extension of mineralization to the northwest with one hole intersecting significant grade.

Drill Highlights:

  • CDD45: 136.0 metres at 75 grams per tonne (g/t) silver from 4.0 metres depth including 14.0 metres at 211 g/t silver from 40.0 metres depth;
  • CDD44: 60.0 metres at 92 g/t silver from 90.0 metres depth including 10.1 metres at 264 g/t silver from 118.0 metres depth;
  • CDD43: 38.9 metres at 200 g/t silver* from 104.0 metres depth, including 11.0 metres at 605 g/t silver from 120.7 metres depth;
  • CDD41: 86.0 metres at 90 g/t silver** from 6.0 metres depth including 26.0 metres at 119 g/t silver from 18.0 metres depth and 12.0 metres at 198 g/t silver from 66.0 metres depth;
  • CDD39: 40.5 metres at 140 g/t silver from 94.0 metres depth including 4.0 metres at 699 g/t silver from 102.0 metres depth.
  • CDD37 (Step-out hole): 6.0 metres at 105 g/t silver from 22.0 metres depth.

* includes 6.9 metres of no recovery in 3 intervals with zero grade assumed;
** includes 7.1 metres of no recovery in 3 intervals with zero grade assumed.

Dr. Graham Carman, Tinka’s President and CEO, stated: “These excellent new drill results provide better definition of the high-grade, near-surface silver oxide zones at Colquipucro, which will be important in any future mining operation. Thick (~80 metre true thickness) silver oxide mineralization occurs at or near to the surface beneath Colquipucro hill in CDD41 (86 metres at 90 g/t silver) and a number of other adjacent holes (e.g. CDD30: 104 metres at 96 g/t silver). Near the southern margin of the resource, CDD43 (39 metres at 200 g/t silver, including 11 metres at 605 g/t silver) has defined a 40 metre wide, high-grade east-west trending structure at a vertical depth of 50 metres.”

“This recent drill program has now achieved a drill line spacing of 50 metres across the Colquipucro resource. The next steps for the project will include an updated resource estimate, to be calculated by an independent consultant, during Q1 2015. Further metallurgical test work of the silver oxide mineralization will determine the likely recoveries of any future silver leach operation. Silver recoveries in initial leach tests of between 50-85% were previously obtained, results which are considered very encouraging. Once metallurgical testing is completed and results assessed, the next phase work program is likely to include a Preliminary Economic Assessment (PEA).”

Geology of the Silver Mineralization

Drill holes completed in the current program are plotted on a geology map – see Figure 1. Highlights of drill holes on two cross sections are also plotted – see Figure 2. Silver mineralization at Colquipucro is defined over an area of approximately 430 metres (north-south) by 200 metres (east-west), and a vertical thickness of around 80 metres. Drill line spacings are 50 metres apart across the deposit.

The silver mineralization at Colquipucro is hosted predominately by a quartz sandstone unit (“Goyllar Group”), 80-100 metres thick, dipping gently to the southwest. The silver oxide mineralization occurs with iron oxides (following oxidation of primary sulphides), with or without manganese oxide, commonly in highly fractured rocks. Mineralization appears to be enriched at the lower contact of the sandstone, and in east-west trending fracture zones which dip at moderate angles (30 to 70 degrees) to the north. Beneath the sandstone lies a sedimentary unit consisting of breccia, siltstone, shale and limestone approximately 150 metres thick (“Oyon Formation”). The Oyon Formation hosts zinc mineralization (oxidized or transitional to sulphide). A metamorphic sedimentary rock, “phyllite” (“Excelsior Group”), lies beneath the Oyon Formation and is unmineralized. Drill holes were angled to the south or to the north at angles of between 42 and 60 degrees. Tables 1 and 2 summarize all drill results and drill collar information.

The true widths of the drill intercepts are between 60% and 100% of the reported down-hole widths (see Table 1). A 15 g/t silver cut-off over 6 metre drilling intervals was used by the Company. Intervals of no core recovery within mineralized intervals have been given a zero grade.

Ayawilca Drill Program

Tinka has recently completed a 6,400 metre drill program at the Ayawilca zinc and associated base metals project, located 2km to the south of Colquipucro. We expect the full results of the drill program at Ayawilca to be released by the end of January 2015.

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.

About Tinka Resources Limited

Tinka is a junior resource acquisition and exploration company with projects in Peru. Tinka’s focus is on its 100%-owned Ayawilca and Colquipucro projects in the highly mineralized zinc-lead-silver belt of central Peru, 200 kilometres north of Lima. The Ayawilca project, located 40 kilometres from Peru’s largest historic zinc mine, Cerro de Pasco, has the potential to be a major zinc sulphide discovery. The nearby Colquipucro silver oxide project is a near-surface, sandstone hosted silver oxide deposit with a current inferred resource containing 32 million ounces silver with potential for expansion.

On behalf of the Board,

“Graham Carman”
Dr. Graham Carman, President & CEO

Investor Information: 
www.tinkaresources.com
1305 — 1090 West Georgia St., Vancouver, BC, V6E 3V7
James Powell + 1-647-478-8976
Seema Sindwani +1 647-478-3017
info@tinkaresources.com

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, capital 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 initiatives, competition, operating performance, environmental and safety risks, delays in obtaining or failure to obtain necessary permits and approvals from local authorities, community 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.

 

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.
Notes on core sampling:

All holes are diamond core holes with recoveries generally between 80% – 100%. HQ drill core is marked up, logged, and photographed on site. Cores are cut in half and sampled at the Company’s core storage facility, with half-cores stored as reference. Half-core is bagged on average over 2 metre composite intervals and sent to Certimin Laboratory in Lima for assay in batches. Standards and blanks are inserted into each batch prior to departure from the Company’s facilities. At the laboratory, samples are dried, crushed to 100% passing 2mm, then 500 grams pulverized for multi-element analysis by ICP using multi-acid digestion. Samples assaying over 25 g/t silver in the ICP are then re-assayed using an ore-grade AAS technique. The AAS result takes priority over the ICP for reporting purposes. In the historic drill holes (CDD1 to CCD35), AAS re-assaying was done when ICP data exceeded 100 g/t silver. The AAS silver values have been found to be generally 1-2% higher than the ICP silver results.

Silver intersections have been calculated on the basis of a 15 g/t cut-off over 6 metre intervals. For intervals of no core recovery within a mineralized interval (see Comments in Table 1), the non-recovered intervals have been given zero grade. Poor core recoveries can occur within zones of broken and/or clay rich rock, or where drills cut old mine work-ings.

Table 1. Summary of all significant silver oxide drill intersections from Colquipucro (new results highlighted)

Drill hole From m To m

Interval m

Silver g/t

Comment

CDD45 4.0 140.0 136.0 75 2.7m no recovery in 4 intervals
including 40.0 54.0 14.0 211  
CDD44 6.0 80.0 74.0 54  
and 90.0 150.0 60.0 92
including 118.0 128.1 10.1 264  
including 136.0 140.0 4.0 383
CDD43 26.0 32.0 6.0 40
and 62.0 72.0 10.0 30
and 86.0 94.0 8.0 34
and 104.0 142.9 38.9 200 6.9m no recovery in 3 intervals
including 120.7 131.7 11.0 605  
CDD42 8.0 14.0 6.0 19
and 20.0 96.0 76.0 61
including 58.0 66.0 8.0 177  
CDD41 6.0 92.0 86.0 90 7.1m no recovery in 3 intervals
including 18.0 44.0 26.0 119  
including 66.0 78.0 12.0 198 0.8m no recovery in 1 interval
CDD40 1.2 90.0 88.8 50
and 110.0 124.0 14.0 19
and 154.0 216.0 62.0 51
including 202.0 208.0 6.0 169
CDD39 10.0 16.0 6.0 47
and 36.0 84.0 48.0 25 1.5m no recovery in 1 interval
and 94.0 134.5 40.5 140
including 102.0 106.0 4.0 699
CDD38 38.0 56.0 18.0 28
and 70.0 80.0 10.0 20
CDD37 22.0 28.0 6.0 105
CDD36 NSR

SIGNIFICANT PAST DRILL RESULTS

Drill hole From m To m

Interval m

Silver g/t

Comment

CDD35 24.0 30.0 6.0 25
CDD34 74.0 112.3 38.3 56  0.8m no recovery in 1 interval
and 122.0 132.0 19.0 27
and 152.0 200.0 48.0 29
CDD33 28.0 54.0 26.0 37
CDD32 NSR
CDD31 2.0 70.5 68.5 55
CDD30 2.0 106.0 104.0 96  1.8m no recovery in 1 interval
including 58.0 70.0 12.0 156  
including 92.0 106.0 14.0 201  
CDD29 2.0 124.0 122.0 76 3.8m no recovery in 2 intervals
including 44.0 68.0 24.0 123  
including 106.0 120.0 14.0 189 0.4m no recovery in 1 interval
and 158.0 180.0 22.0 23 3.9m no recovery in 2 intervals
CDD28 22.0 132.0 108.0 57 3.6m no recovery in 2 intervals
including 128.0 132.0 4.0 521  
CDD27 12.0 42.0 30.0 34
and 48.0 58.0 10.0 37
and 66.0 78.0 12.0 33
and 94.0 136.7 42.7 96
including 118.0 126.0 8.0 298  
CDD26 24.0 32.5 8.5 206
and 84.0 162.0 78.0 38
CDD25 6.0 52.0 46.0 35
and 70.0 114.0 44.0 36
and 130.0 144.0 14.0 21
CDD24 30.0 62.0 32.0 48
CDD23 12.0 92.0 80.0 105
including 20.0 30.0 10.0 199  
including 38.0 52.0 14.0 179  
including 82.0 86.0 4.0 306  
CDD22 12.0 98.0 86.0 80 1.5m no recovery in 1 interval
including 14.0 28.0 14.0 132  
including 89.6 96.0 6.4 214  
CDD21 14.0 108.0 94.0 91 1.3m no recovery in 1 interval
including 66.0 78.0 12.0 125  
CDD20 22.0 88.0 66.0 30 10.4m no recovery in 2 workings
CDD19 16.0 68.0 52.0 128
including 56.0 64.0 8.0 425  
and 96.0 128.9 30.0 35 7.5m no recovery in 2 intervals
CDD18 50.0 56.1 6.1 26
and 100.0 124.5 24.5 23 0.5m no recovery in 1 interval
CDD17 102.0 126.1 24.1 31 0.8m no recovery in 1 interval
CDD16 50.0 68.0 18.0 37
and 85.0 98.0 13.0 102
and 118.0 146.0 28.0 25 3.4m no recovery in 2 intervals
CDD15 92.0 128.0 36.0 26
CDD14 0.0 10.0 10.0 26
and 22.0 32.0 10.0 66
and 64.0 82.0 18.0 34
CDD13 0.0 10.0 10.0 27
and 18.0 88.0 70.0 123
including 50.0 62.0 12.0 240  
and 104.0 118.0 14.0 87
CDD12 20.0 62.0 42.0 31
and 70.0 92.0 22.0 71
including 84.0 90.0 6.0 157  
CDD11 0.0 80.0 80.0 65
including 2.0 8.0 6.0 221  
and 88.0 146.0 58.0 123
including 138.0 146.0 8.0 551  
CDD10 120.0 142.0 22.0 31
CDD9 42.0 66.0 24.0 39
CDD8 NSR
CDD7 80.0 88.0 8.0 113
CDD6 0.0 66.0 66.0 83
including 0.0 8.0 8.0 103  
including 28.0 52.0 24.0 129  
and 116.0 120.0 4.0 212
CDD5 NSR
CDD4 0.0 54.0 54.0 67
including 14.0 26.0 12.0 176  
and 96.0 128.0 32.0 265
including 122.0 128.0 6.0 1003  
CDD3 0.0 32.0 32.0 65
including 2.0 4.0 2.0 486  
and 62.0 74.0 12.0 26
and 146.0 148.0 2.0 664
and 162.0 186.0 24.0 80
CDD2 62.0 98.0 36.0 55
CDD1 0.0 34.0 34.0 55
including 0.0 4.0 4.0 154  
and 66.0 106.0 40.0 35

Disclaimer: Non-recovered intervals have been assumed to contain zero grade.
NSR = No significant result.

Notes on drill hole data (Table 2):
Eastings and Northings are based on PSAD56 Zone18S UTM datum. The coordinates for all holes were surveyed using a theodolite, based on known surveyed points within the project area. Azimuth and dip measurements of drill holes were taken using compass and inclinometer. All holes from CDD36 onwards were down-hole surveyed using a Reflex system (detailed data not shown).

Table 2. Drill hole collar coordinates and hole details 

Drill hole Easting Northing Elevation  m Depth m Azimuth Dip Comment Date
CDD36 332498 8848000 4328 201.00 360 -50 New results 2014
CDD37 332484 8848043 4321 114.00 360 -42 New results 2014
CDD38 332541 8847975 4338 114.80 360 -50 New results 2014
CDD39 332744 8847873 4361 147.40 180 -55 New results 2014
CDD40 332743 8847836 4364 232.80 180 -50 New results 2014
CDD41 332645 8847877 4350 141.50 360 -60 New results 2014
CDD42 332645 8847877 4351 146.00 180 -50 New results 2014
CDD43 332738 8847743 4310 147.90 180 -50 New results 2014
CDD44 332637 8847773 4315 179.40 180 -50 New results 2014
CDD45 332647 8847709 4305 153.70 180 -50 New results 2014
PAST COLQUIPUCRO DRILL HOLES  
CDD1 332595 8847709 4293 151.94 180 -50 Released 2007
CDD2 332598 8847765 4297 159.65 180 -50 Released 2007
CDD3 332592 8847829 4309 213.20 180 -50 Released 2007
CDD4 332697 8847747 4316 186.95 180 -55 Released 2007
CDD5 332790 8847542 4167 127.60 360 -50 Released 2007
CDD6 332692 8847660 4276 121.00 180 -60 Released 2007
CDD7 332793 8847682 4269 135.00 180 -50 Released 2007
CDD8 332897 8847741 4293 100.40 180 -50 Released 2007
CDD9 332796 8847875 4362 173.85 180 -50 Released 2007
CDD10 332897 8847994 4328 262.15 180 -50 Released 2007
CDD11 332690 8847844 4353 185.20 180 -55 Released 2007
CDD12 332593 8847911 4342 216.70 180 -60 Released 2007
Drill hole Easting Northing Elevation  m Depth m Azimuth Dip Comment Date
CDD13 332696 8847897 4349 171.95 180 -50 Released 2007
CDD14 332895 8848075 4314 214.45 165 -70 Released 2007
CDD15 332783 8847750 4308 250.00 180 -60 Released 2007
CDD16 332796 8847926 4343 194.70 180 -50 Released 2011
CDD17 332795 8847958 4335 152.80 180 -50 Released 2011
CDD18 332796 8847962 4335 124.50 360 -60 Released 2012
CDD19 332692 8847933 4343 128.90 180 -60 Released 2012
CDD20 332692 8847985 4333 100.70 180 -60 Released 2012
CDD21 332595 8847973 4368 152.60 180 -60 Released 2012
CDD22 332595 8847973 4368 210.00 360 -60 Released 2012
CDD23 332595 8847973 4368 221.90 360 -90 Released 2012
CDD24 332691 8847986 4333 144.00 360 -50 Released 2012
CDD25 332699 8847926 4340 173.60 360 -90 Released 2012
CDD26 332742 8847975 4329 222.80 180 -55 Released 2013
CDD27 332698 8847856 4361 212.65 180 -58 Released 2013
CDD28 332694 8847799 4336 232.90 180 -53 Released 2013
CDD29 332633 8847973 4362 226.10 180 -55 Released 2013
CDD30 332632 8847973 4362 203.70 360 -90 Released 2013
CDD31 332631 8847977 4362 211.90 360 -55 Released 2013
CDD32 332531 8847852 4305 185.60 360 -55 Released 2013
CDD33 332744 8847925 4340 224.60 180 -55 Released 2013
CDD34 332796 8847875 4362 242.60 180 -62 Released 2013
CDD35 332580 8847870 4319 188.40 180 -53 Released 2013

Figure 1. Simplified Geology and Drill Hole Location Map

Figure 2. Cross sections through Colquipucro with geological interpretation

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