Windarra Minerals Ltd.

Published : August 08th, 2007

Channel Sampling with Metallic Screen Assaying Shows that Fire Assays Underestimate Gold Grades at t

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WINDARRA MINERALS LTD.

 

 

NEWS RELEASE                                                                                                August 8, 2007

 

 

Channel Sampling with Metallic Screen Assaying Shows that Fire Assays Underestimate Gold Grades at the Bonanza-Grade Vein, Pukaskwa Property

 

Five new channel samples collected from the Bonanza-Grade zone on Windarra’s wholly-owned Pukaskwa property confirm the very high gold grades of the zone, yielding an average of 0.826 oz/t (29.556 g/t; see Table below and News Release dated July 25, 2006). 

 

The samples were collected to test for the impact of the “nugget effect” at the Bonanza-Grade zone, in which coarse visible gold is commonly found.  All samples were analyzed with a straight “fire assay” procedure and also with a “metallic screen” fire assay procedure.  Both methods are industry standard analytical techniques, however the Metallic Screen procedure utilizes a somewhat larger sample size and involves assaying of both fine and coarser-grained sample splits.  It is considered to yield a more accurate representation of gold grades for mineralization in which visible gold grains are common.

 

As is apparent from the table below, Metallic Screen assays yield gold values that are more than 100% higher, on average, than conventional fire assays for the same samples.  Windarra is now cognizant of this issue and is undertaking a program of Metallic Screen check assaying for all samples collected from the Pukaskwa property.

Bonanza-Grade Zone Channel Samples*

 

Metallic Screen Assay

Fire Assay

Channel No.

Au (oz/t)

Au (g/t)

Au (oz/t)

Au (g/t)

BGZ-05

0.403

13.813

0.164

5.631

BGZ-06

0.0346

1.186

0.018

0.605

BGZ-07

0.310

10.630

0.130

4.455

BGZ-08

1.338

45.871

0.511

17.520

BGZ-09

2.226

76.295

0.804

27.574

averages

0.862

29.559

0.325

11.157

*samples were collected from the  vein and its immediately adjacent wallrock, and the total for each channel sample averaged 0.32 metres in width (see  primary data table below); the values shown above were calculated for a width of 1.95 metres, with values for the unsampled wallrock in the calculations assumed to be negligible.

 

Channel samples were sawn into the stripped and washed, glacially-polished outcrop in which the vein is exposed.  Samples were collected across the strike of the veins, which range between 8 and 20 centimetres true thickness and average approximately 12 to 15 centimetres.  Channel samples were cut 4 to 8 centimetres deep and 10 to 12 centimetres across.  Because previous sampling indicated very low wallrock values, only the immediate wallrock was sampled.

 

Bonanza-Grade Zone Channel Samples, Primary Data

Sample No.

Length (m)

Au (ppm) Both Fractions

Au (ppm)

Coarse Fraction

Au (ppm)

Fine Fraction

Channel Sample No. 5

PKB7001

0.09

752

69100

301

PKB7002

0.10

6.67

61.7

6.37

PKB7003

0.20

3.58

107

2.13

Channel Sample No. 6

PKB7004

0.03

0.81

2.22

0.78

PKB7005

0.08

5.83

30.3

5.46

PKB7006

0.05

0.89

5.29

0.84

PKB7007

0.11

59.8

972

28.45

Channel Sample No. 7

PKB7008

0.15

2.67

30.1

2.23

PKB7009

0.13

324

7910

134.5

Channel Sample No. 8

PKB7010

0.05

19.15

373

12.93

PKB7011

0.07

418

12350

208

PKB7011

0.03

33.7

950

23.7

PKB7012

0.20

1220

47600

446

Channel Sample No. 9

PKB7014

0.20

6.89

112.5

5.47

PKB7015

0.14

2170

81100

780

 

Future Work:

The Bonanza-Grade vein has not yet been drilled. Windarra plans to drill-test this zone, and to further drill-test the Middle Finger Lake zone (see News Release dated July 26, 2007) and other targets on the property.  Prior to drilling the vein, the intent is to strip the area of strongly anomalous soil geochemistry eastward along strike of the Bonanza-Grade zone, mainly to provide geologic control for drilling in that area.

 

The Pukaskwa property is located 50 kilometres west of Wawa, Ontario, less than 20 km northwest of Wesdome’s Eagle River Mine, which has produced approximately 600,000 ounces gold since 1995.  The property, which consists of a belt of 55 contiguous unpatented mining claims spanning a length of over 13 km, also lies 20 km southwest of the formerly-producing Magnacon mine, in which Windarra holds an interest.  Like the Pukaskwa property, the Magnacon properties lie along the highly prospective Mishibishu gold belt.

 

The field and analytical data described in this release has been reviewed and approved by C.J. Greig, M.Sc. P.Geo., a Qualified Person as defined by National Instrument 43-101.  A quality assurance/quality control program is in place for the Pukaskwa sampling, with the insertion of blank samples in the field, and standards in the lab.  All samples from the channel sampling program were cut using a gas-powered diamond saw, with samples submitted to ALS Chemex Laboratories of Thunder Bay, Ontario and North Vancouver, B.C. for preparation and analysis, respectively.  All gold analyses reported in this release were completed using both conventional fire assay and Metallic Screen assay procedures.

 

On behalf of the Board of Windarra Minerals Ltd.

 

“John Pallot”

President

 

The TSX Venture Exchange has not reviewed and does not accept responsibility for the

adequacy or accuracy of the content of this news release.

 

 

 

Windarra Minerals Ltd.

CODE : WRA.V
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Windarra Min. is a gold exploration company based in Canada.

Windarra Min. holds various exploration projects in Canada.

Its main exploration properties are MAGNACON, JAMES BAY LOWLANDS CLAIMS and PUKASKWA in Canada.

Windarra Min. is listed in Canada. Its market capitalisation is CA$ 2.2 millions as of today (US$ 2.1 millions, € 1.6 millions).

Its stock quote reached its lowest recent point on December 09, 2002 at CA$ 0.01, and its highest recent level on December 22, 2005 at CA$ 0.55.

Windarra Min. has 36 847 000 shares outstanding.

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Financings of Windarra Minerals Ltd.
8/20/2010Windarra Minerals Ltd. Announces Private Placement
6/6/2007CLOSES PRIVATE PLACEMENT; DRILLING BEGINS ON PUKASKWA PROPER...
5/14/2007Arrange Private Placement
Nominations of Windarra Minerals Ltd.
5/18/2010Windarra Minerals Ltd. appoints consultant for Africa
Project news of Windarra Minerals Ltd.
7/17/2013Wesdome and Windarra Announce Letter of Intent Regarding Acq...
2/9/2011to Drill Mishi Leases Gold Targets
6/9/2009(Pukaskwa)Closing of Magnacon Purchase and execution of the Pukaskwa
10/26/2007(Valentine Lake (leprechaun)) Complete Results for Diamond Drilling of Windarra's Pukaskw...
8/8/2007(Valentine Lake (leprechaun))Channel Sampling with Metallic Screen Assaying Shows that Fi...
7/26/2007(Valentine Lake (leprechaun))First Five Drillholes Confirm Excellent Potential of Gold Mi...
Corporate news of Windarra Minerals Ltd.
10/1/2013Wesdome Gold Mines and Windarra Minerals Announce Closing of...
9/23/2013Shareholders Approve Business Combination With Wesdome
7/30/2013Wesdome and Windarra announce definitive agreement regarding...
6/9/2011(WRA.V) Intersects Broad Zones of Near-Surface Gold Minerali...
5/7/2008Sells shares of Westward Explorations Ltd.
2/29/2008Notice of Intention to Sell
1/3/2008 Acquires Mishi Leases and Royalty to Expand Ontario propert...
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