Rockhaven Resources Ltd. Drilling Intersects Visually Promising Mineralization Below Well Mineralized Trenches At Its Klaza Gold-Silver Property In Yukon

August 25, 2010 - Rockhaven Resources Ltd. (TSX-V:RK) (“Rockhaven”) is pleased to provide an update on a diamond drilling and trenching program that is currently underway on its wholly-owned Klaza property located in the Dawson Range Gold Belt of central Yukon Territory. The comprehensive exploration program is evaluating bulk tonnage and high-grade vein targets on this road accessible property.

Ten drill holes have tested various newly and previously discovered veins and breccia zones. The most visually promising intercepts are in three holes at the Klaza Zone, which is the northern most of the zones identified to date on the property. The mineralization in those holes is intimately associated with a series of narrow feldspar porphyry dykes. It consists of veins, breccias and sheeted veinlets hosting galena, arsenopyrite, pyrite and sphalerite in quartz and carbonate gangue. The sulphide minerals typically comprise 1 to 10% of the rock, often increasing to between 20 and 80% over 25 to 100 cm intervals. Pervasive phyllic and argillic alteration are developed in surrounding granodiorite and within clasts in the breccias. The matrices of the breccias contain fine-grained black sulphides. The mineralization is spatially and probably genetically related to the porphyry dykes, which strike west-northwesterly and dip steeply to the south. Photographs of representative core samples can be viewed on Rockhaven’s website (

Recently completed excavator trenches, up dip from the mineralized drill intercepts at the Klaza Zone, have exposed dykes, alteration and mineralization that appear to be weathered equivalents of those seen in the drill holes. Assays are only available for two trenches (KL-10-09 and KL-10-10), which are located 100 m apart. Highlights from those trenches are:
  • 2.87 g/t gold and 42.3 g/t silver over 20.10 m in KL-10-10; and
  • 2.33 g/t gold and 34.91 g/t silver over 16.35 m in KL-10-09.
Only a 300 m length of the Klaza Zone has been tested by trenching or drilling. The zone is completely open to extension along strike in both directions and at depth. No exploration on the property has been carried out north of the Klaza Zone.

Additional new results from excavator trenches located in other zones on the Klaza property include:
  • 6.41 g/t gold and 27.5 g/t silver over 4.00 m;
  • 4.73 g/t gold and 7.6 g/t silver over 3.00 m;
  • 2.26 g/t gold and 19.9 g/t silver over 4.20 m;
  • 4.47 g/t gold and 1.8 g/t silver over 2.50 m;
  • 2.45 g/t gold and 71.5 g/t silver over 2.55 m; and
  • 1.39 g/t gold and 1,140.0 g/t silver over 0.80 m.
The Klaza property is located 50 km west of Carmacks and is accessible by a two-wheel drive road from the Klondike Highway. The property has been recently expanded to 22 km2 through the staking of 64 additional mineral claims. These claims cover the projected western extension of the Klaza Zone.

Approximately 7,600 linear metres of excavator trenching have been completed, which is about two-thirds of the trenching planned for the 2010 exploration program. Assays have been received for the first 4,500 m of the trenching. Diamond drill holes and excavator trench locations appear on a plan map that can be seen at

Chip samples are being processed in 36 sample batches with each batch including an assay standard. Analytical work is being done by ALS Chemex with sample preparation in Whitehorse and assays and geochemical analyses in North Vancouver. The samples were initially analyzed for gold by fire assay followed by atomic absorption (Au-AA24) and 35 other elements by inductively coupled plasma-atomic emission spectroscopy (ME-ICP41). Samples that exceeded detection limits for silver, lead or zinc were assayed by gravimetric methods (Ag/Zn/Pb-OG62). All standard samples passed QAQC reviews.

The exploration program is being conducted by Archer, Cathro & Associates (1981) Limited. Technical information in this news release has been reviewed by Heather Smith, B.Sc., PGeo, a qualified person for the purpose of National Instrument 43-101.

Rockhaven Resources Ltd. is a strongly managed Canadian mineral exploration company focused on growth through acquisition of advanced stage projects.

For additional information concerning Rockhaven Resources Ltd. or its various exploration projects please visit or contact:

Matthew Turner, CEO
Rockhaven Resources Ltd.
T: 604-688-2568


CAUTIONARY NOTE: This news release includes certain “forward-looking statements”. Other than statements of historical fact, all statements included in this release, including, without limitation, statements regarding future plans and objectives of Rockhaven are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Factors that could cause actual results to differ materially from those expected by Rockhaven are those risks described herein and from time to time, in the filings made by Rockhaven with Canadian securities regulators. Those filings can be found on the Internet at

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