Riverstone Intersects High Grade Gold at Nami

(firmenpresse) - Riverstone Intersects High Grade Gold at Nami

April 21, 2010 Symbols: TSXV – RVS; Frankfurt – 3RV

Riverstone Resources Inc. (TSXV: RVS) is pleased to report the results from the first 30 holes of the drilling program currently underway on its Karma gold project in Burkina Faso, West Africa. The holes were drilled on the Company’s promising Nami artisanal gold discovery (see map at: http://www.riverstoneresources.com/i/maps/2010-04-21-Map1.jpg). The highlights of the gold intercepts are as follows:

•24 metres grading 5.00 g/t, including 12 metres grading 9.45 g/t in Hole 056
•12 metres grading 4.67 g/t, including 6 metres grading 7.73 g/t in Hole 049
•12 metres grading 2.31 g/t, including 2.0 metres grading 9.54 g/t in Hole 045
•34 metres grading 1.17 g/t in Hole 046
•10 metres grading 1.73 g/t, including 6.0 metres grading 2.45 g/t in Hole 039
•7 metres grading 2.47 g/t, including 4.0 metres grading 4.03 g/t in Hole 044

The key conclusions derived from the initial drilling of the site are:

•26 out of 30 holes returned significant intercepts of gold mineralization confirming a mineralized footprint of 450 metres by 200 metres and open to the west, north and south
•Gold mineralization is confined to quartz-rich zones within a breccia body and a fractured granodiorite
•The breccia increases in thickness to the north (see cross-sections at http://www.riverstoneresources.com/s/MapGallery.asp?ReportID=999999999,395843&ReportIDRef=343T6MTDBBTWM)
•Both gold grades and the thickness of the mineralized intercepts appear to be increasing down-dip to the west

“We are very pleased with our initial results from the Nami Site,” commented M.D. McInnis, President and CEO of Riverstone. “We have confirmed a large mineralized system with significant high grade intercepts that clearly warrant additional drilling. Nami is an important discovery and any ounces that are developed at Nami will be accretive to the NI 43-101 gold resource at the Company’s adjacent Rambo, Goulagou and Kao deposits.”

The program on the Karma project comprising 9,000 metres of RC drilling in approximately 70 holes commenced on March 15, 2010. The initial 30 holes were completed on the Nami site. Results confirm the previous interpretation of the geology of Nami (see NR dated Feb. 23 and Mar. 16, 2010), with a northerly to northwesterly trending breccia containing widespread quartz veins. The breccia zone is dipping gently to the west, and it can be traced consistently from hole to hole and section to section. The breccia appears to be increasing in thickness to the north. The shallowly dipping geometry of the gold zone will allow it to be drilled down-dip at reasonably shallow depths.

One and possibly two additional gold mineralized zones appear to be present on some sections, although they have not been fully defined. There are also indications that the gold grade may increase with depth to the west, and that the gold zone widens in this direction. Additional drilling will be undertaken to test this interpretation.

It is possible that the RC drilling may understate the gold grades in drill holes due to incomplete sample recoveries within some of the mineralized intercepts. Sample recovery averages 58% within all assay intervals grading at least 0.5 g/t gold, but it drops as low as 44% in one of the best mineralized intercepts in RC-049, which graded 4.67 g/t gold over 12 m.

This can possibly be attributed to two factors. Firstly, the mineralized zone is brecciated and oxidized, making for generally poor sample recovery using an RC drill. Secondly, the fact that most drilling has concentrated where the artisanal miners have been most active means that in some cases, the mineralized zone has been partially removed prior to drilling. The drill logs note that several holes intersected the underground workings, which essentially means zero recovery in those parts of the zone.

Significant mineralized intercepts are presented in the following table. Most holes were drilled towards the east, although several scissor holes were oriented towards the west to test the interpreted orientation of the zone. All holes were drilled at either -55º or -60º.

Nami Intercepts - 2010 - Phase 1 RC

Hole numberInterval (m)InterceptAverage
FromTo(metres)(g/t Au)

RMB-10-RC-034 *667610.00.876
including72742.03.000

RMB-10-RC-035566610.00.674
and708212.00.475

RMB-10-RC-03664728.00.507

RMB-10-RC-037466014.00.487
including58602.01.800

RMB-10-RC-039223210.01.734
including24306.02.448
and1281324.01.253
and1461504.01.673
including1461482.02.930

RMB-10-RC-04138402.01.400
and829412.00.506
including92942.01.585

RMB-10-RC-04234406.02.048
and527624.00.751
including52564.01.950
and including627210.00.706
and921008.00.941
including961004.01.595

RMB-10-RC-044 *15227.02.469
including18224.04.033

RMB-10-RC-045 *183012.02.309
including28302.09.540

RMB-10-RC-046286234.01.172
including30388.01.527
and including56626.02.479

RMB-10-RC-048 *286032.00.689
including30388.01.201

RMB-10-RC-049 *344612.04.666
including34406.07.730
and74762.01.200

RMB-10-RC-050 *92011.00.669
including12164.01.102

RMB-10-RC-053 *547420.00.981
including58646.01.907

RMB-10-RC-054 *64684.08.070

RMB-10-RC-055 *87264.00.446
including16248.00.525
and including46504.01.134

RMB-10-RC-056345824.00.372
including40466.00.745
and 669024.04.997
including68702.02.070
and including789012.09.453

RMB-10-RC-057 1121142.03.890

RMB-10-RC-058 143420.00.325
and38446.00.602

RMB-10-RC-062 165034.00.654
including285022.00.843

RMB-10-RC-063 162610.01.261
including22242.05.370
and48524.00.566
and58624.00.634
and1041106.00.750

* Hole intercepted one or more artisanal shafts

The drill rig has now been mobilized to the Company’s nearby Rambo Main and Goulagou gold deposits to drill approximately 2,000 metres of in-fill and step-out drilling. The drill will then be re-mobilized to the Nami site to continue the RC drilling program. A contract has also been signed for a second drill rig, which will be used for diamond core drilling on Nami as well as on the Rambo Main and Goulagou gold deposits. It will be used to improve the sample recovery at Nami, test the zone down-dip and collect samples for metallurgical and geotechnical work.

Riverstone maintains a quality control program involving the use of repeat assays, inserted blanks and the use of certified standards from an accredited Canadian laboratory. All rock samples were assayed using standard fire assay with atomic absorption techniques, with samples grading over two grams gold per tonne re-assayed with a gravimetric finish, at the independent Abilab Burkina SARL laboratories in Ouagadougou, Burkina Faso, which is part of the ALS Chemex group.

Riverstone Resources Inc. is active in gold exploration in Burkina Faso, West Africa, where the company holds an extensive portfolio of six high quality exploration permits covering 2,300 square kilometres. For further information about the company and its activities, please refer to the company’s website at www.riverstoneresources.com and under the Company’s profile at www.sedar.com.

ON BEHALF OF THE BOARD
“Michael D. McInnis”
______________________________________
Michael D. McInnis, P. Eng., President & CEO

For further information contact:
Vancouver Office:
Michael D. McInnis, President 604-801-5020 Raju Wani, Investor Relations 403-240-0555
Email: info(at)riverstoneresources.com Ron Cooper, Investor Relations 604-986-0112


Neither 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 release.

Paul G. Anderson, P. Geo. is a Qualified Person for RVS and has reviewed and approved the contents of this release.

Certain statements made and information contained in this news release and elsewhere constitutes “forward-looking information” within the meaning of the Ontario Securities Act. Forward-looking statements are subject to a variety of risks and uncertainties which could cause actual events or results to differ from those reflected in the forward-looking statements, including, without limitation, risks and uncertainties relating to the interpretation of drill results and the estimation of mineral resources, the geology, grade and continuity of mineral deposits, the possibility that future exploration, development results will not be consistent with the Company’s expectations, accidents, equipment breakdowns, title matters and surface access, labour disputes, the potential for delays in exploration activities, the potential for unexpected costs and expenses, commodity price fluctuations, currency fluctuations, failure to obtain adequate financing on a timely basis and other risks and uncertainties, including those described under Risk Factors in each management discussion and analysis. In addition, forward-looking information is based on various assumptions including, without limitation, the expectations and beliefs of management, the assumed long term price of gold, that the Company will receive required permits and access to surface rights, that the Company can access financing, appropriate equipment and sufficient labour and that the political environment within Burkina Faso will continue to support the development of environmentally safe mining projects. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements. Accordingly, readers are advised not to place undue reliance on forward-looking statements.

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Datum: 22.04.2010 - 15:52 Uhr
Sprache: Deutsch
News-ID 19523
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