Rio Cristal Zinc Corporation

Rio Cristal Zinc Corporation

October 15, 2008 09:30 ET

Rio Cristal Zinc Completes Drilling of High-Grade Zinc Target

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Oct. 15, 2008) - Rio Cristal Zinc Corp. (the "Company" or "RCZ") (TSX VENTURE:RCZ) is pleased to announce the completion of its phase one drilling program at its high-grade zinc Cristal Project within its Charlotte Bongara claim block in Peru.

Charles Ushela, President and CEO of Rio Cristal Zinc, said, "Results from our zinc oxide drilling program at Cristal are very favorable and we are extremely pleased. During this drilling campaign, we completed 34 shallow drill holes totaling 1,999 meters and the results exceeded our expectations. We determined that both step-out and in-fill drilling are warranted in a zinc oxide area that measures 600 meters by 250 meters."

Mr. Ushela continued, "In addition to our high-grade zinc oxide drill results, we drilled 5 deep holes totaling 2,230 meters to test the stratigraphic sequence and for zinc sulfides. Deep drilling confirmed that host rock formation permeability conditions are favorable for Mississippi Valley-type zinc-lead mineralization. While our five deep holes were not ore grade, disseminated zinc sulfides are present in the system at depth and additional drilling is warranted."

Highlights of the 2008 drilling program include the following high grade zinc oxide intercepts.

4th Set of Drill Holes

Drill hole CR-35: 11.5 meters of 29.7% zinc from 9.5 to 21.0 meters depth

Drill hole CR-39: 15.7 meters of 11.8% zinc from 14.1 to 29.8 meters depth

Drill hole CR-37: 8.2 meters of 7.4% zinc from 31.1 to 39.3 meters depth

3rd Set of Drill Holes - From Sept 3, 2008 Press Release

Drill hole CR-24: 8.1 meters of 23.5% zinc from 23.8 to 31.9 meters depth

Drill hole CR-08: 6.3 meters of 27.9% zinc from 33.4 to 39.7 meters depth

Drill hole CR-03: 3.3 meters of 27.7% zinc from 56.8 to 60.1 meters depth

Drill hole CR-25: 2.0 meters of 22.5% zinc from 36.3 to 38.3 meters depth

Drill hole CR-22: 7.5 meters of 16.7% zinc from 18.1 to 25.7 meters depth

Drill hole CR-28: 3.9 meters of 15.1% zinc from 18.5 to 22.4 meters depth

Drill hole CR-29: 10.1 meters of 8.1% zinc from 20.7 to 30.8 meters depth

2nd Set of Drill Results - From July 22, 2008 Press Release

Drill hole CR-20: 15.5 meters of 29.5% zinc from 49.6 to 65.1 meters depth

Drill hole CR-18: 21.7 meters of 22.0% zinc from 5.6 to 27.3 meters depth

Drill hole CR-11: 10.3 meters of 21.1% zinc from 11.2 to 21.5 meters depth

Drill hole CR-19: 14.5 meters of 7.5% zinc

Drill hole CR-17: 9.7 meters of 5.0% zinc

1st Set of Drill Results - From July 3, 2008 Press Release

Drill hole CR-07: 58.6 meters of 10% zinc

Drill hole CR-13: 14.5 meters of 14.7% zinc from 12.9 to 27.4 meters depth

Drill hole CR-14: 12.5 meters of 26.1% zinc from 11 to 23.5 meters

Drill hole CR-05: 58.8 meters of 5.0% zinc

Drill hole CR-09: 13.1 meters of 6.0% zinc from 3.0 to 16.1 meters depth

Drill hole CR-12: 7.4 meters of 6.3% zinc from 1.7 to 9.1 meters depth

All intercepts are down-hole lengths and true widths have not been calculated. A geological map identifying drill holes locations, and a table of results are available at the Map Room at In addition to the higher-grade intercepts, drilling also intersected 5.3 meters averaging 3.7% Zn (CR-02), 4.2 meters averaging 4.0% Zn (CR-10), 3.8 meters averaging 2.6% Zn (CR-15), 1.9 meters averaging 14.4% Zn (CR-27), 1.6 meters averaging 6.3% Zn (CR-30), and 0.50 meters averaging 5.7% Zn (CR-32).

The drilling program intercepts are interpreted as being part of an emerging MVT zinc-lead district of which Rio Cristal Zinc controls over 25,000 hectares. The Charlotte Bongara concessions are adjacent to the Florida Canyon exploration project (Votorantim Metais and Solitario Exploration & Royalty Corp.), and a high-grade zinc oxide mine operated by Cementos Pacasmayo S.A.


Shallow target diamond drilling focused on zinc-oxide targets has been performed using HQ diameter core with recoveries averaging greater than 75%. Deep targets diamond drilling program is performed using HQ diameter up to 300m depth, NQ diameter up to 470m depth and BQ diameter up to 600m depth with better than 90% recovery. Core is logged and split on site under the supervision of RCZ geologists. Sampling is done over intervals defined by geological criteria with minimum sample length of 0.5m and a maximum sample length of 2.0m. Samples are bagged, codified, sealed and transported by Company geologists directly to the Company office in Lima, Peru for standards and blank samples insertion and delivered to ALS Chemex Laboratory facilities in Lima, Peru. ALS Chemex is an ISO 9001:2000-certified laboratory and is preparing for ISO 17025 certification. Zinc and lead assays utilize Agua Regia sample digestion with Inductively Coupled Plasma Emission Spectroscopy assaying method (commercial code "ME-ICP41"). Samples grading above maximal 10% Zn detection limit of ME-ICP41 method are assayed using AAS method (Atomic absorption, commercial code AA-46). The QA/QC program for each sampling batch includes geochemical standards insertion every 20th sample, blank samples insertion every 50th sample and field duplicate insertion every 30th sample. High grade samples, pulps, duplicates and rejects will be re-assayed by BSE Inspectorate Laboratory facilities in Lima applying the same samples preparation procedure as that used by ALS Chemex Laboratory.

As required by the National Instrument 43-101, Rio Cristal Zinc's designated Qualified Person is Miroslav Kalinaj, who has verified the technical information reported in this news release.

About Rio Cristal Zinc Corporation

Rio Cristal Zinc is a Canadian corporation focused on the discovery and further development of zinc deposits in Peru. The principal asset of RCZ is the Charlotte Bongara claim block located in northern Peru within an emerging Mississippi Valley-type zinc district. Additional information can be found on the Company's website,

This news release includes certain "forward-looking statements" under applicable Canadian securities legislation. All statements other than statements of historical fact included in this release, including, without limitation, statements regarding potential exploration results, future plans and objectives of the Company 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 results, events and objectives could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from Rio Cristal's expectations include exploration and other risks detailed from time to time in the filings made by the Company with securities regulators.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this news release.

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