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Atna Acquires Copper Project in Chile.


Business Editors

Vancouver, B.C.--(BUSINESS WIRE)--June 7, 2001

Atna Resources Ltd. (TSE See Tokyo Stock Exchange.

TSE

1. See Tokyo Stock Exchange (TSE).

2. See Toronto Stock Exchange (TSE).
:ATN ATN Acute tubular necrosis, see there .) is pleased to announce that it has signed an Agreement to acquire a 100% interest in Barreal Seco, a copper oxide and sulphide deposit located in north-central Chile. The Agreement requires Atna to undertake expenditures of US$250,000 within a 6 month period and to complete a Pre-Feasibilty Study for the exploitation of the oxide resource. It is Atna's expectation that development of the oxide resource, with a low strip ratio (0.20:1), can be completed in less than 3 years to produce a minimum of 10,000 tpy copper cathode from an open-pit mine and SX-EW plant, over a mine life in excess of 10 years.

The Barreal Seco Properties are located in close proximity to infrastructure, at an elevation of 1200 metres, 80 km northeast of the coastal port of Cha[currency]aral and 50 km northwest of Codelco's El Salvador smelter/mine complex. Power is available nearby and access is by gravel road from the Pan-American Highway. The cities of Cha[currency]aral and Taltal are within commuting distance from the mine site. Past activity at site has included small-scale mining for oxides and sulphides, which were delivered to the Enami concentrator and copper cement facility at Taltal.

The Barreal Seco mining claims were optioned by RTZ RTZ Rio Tinto Zinc
RTZ Return To Zero
RTZ Return to Zork (game)
RTZ Retail Trade Zone
 Mining and Exploration Ltd from 1992 through 2000 and were recently returned to the property owners. More than 20,000 meters of drilling has been undertaken in the deposit area (2,407 metres by Enami and 17,700 by RTZ) with 85 holes in the oxide resource.

The existing Barreal Seco resources as estimated by RTZ are stated as:

Oxides 17 Mt 0.70% Cu @ 0.30% Cu cut-off (Strip Ratio: 0.20:1)

Sulphides 54 Mt 0.65% Cu @ 0.40% Cu cut-off (260 Mt 0.34% no

cut-off)

The deposit consists of a specularite-rich breccia breccia: see conglomerate.
breccia

Coarse sedimentary rock consisting of angular or nearly angular fragments larger than 0.08 in. (2 mm). Breccia commonly results from processes such as landslides or geologic faulting, in which rocks are fractured.
 body of 600 metres length by 180 to 300 metres width and 450 metres depth, hosted in andesitic volcanic and sedimentary rocks. The oxide zone extends 90 to 120 metres below surface followed by a 10 to 20 metre thick enrichment zone, which overlies the hypogene hy·po·gene  
adj.
Formed or situated below the earth's surface. Used of rocks.
 zone. Copper oxide mineralization Mineralization
The process by which the body uses minerals to build bone structure.

Mentioned in: Rickets

mineralization,
n the bioprecipitation of an inorganic substance.
 consists of atacamite, malachite malachite (măl`əkīt), a mineral, the green basic carbonate of copper occurring in crystals of the monoclinic system or (more usually) in masses. It is translucent or opaque; the luster is silky, vitreous, adamantine, or dull.  and chrysocolla Chrys´o`col`la

n. 1. (Min.) A hydrous silicate of copper, occurring massive, of a blue or greenish blue color.
. Secondary sulphides are mainly chalcocite chalcocite

Sulfide mineral, Cu2S, that may be an important ore of copper. It belongs to a group of sulfide minerals formed at relatively low temperatures. Chalcocite alters to native copper and other copper minerals.
 and covellite co·vel·lite  
n.
A lustrous indigo-blue mineral, CuS, an important ore of copper.



[After Nicolò Covelli (1790-1829), Italian mineralogist.]
. Hypogene mineralization consists of chalcopyrite and pyrite with minor bornite bornite

Common copper-ore mineral, copper and iron sulfide (Cu5FeS4). Typical occurrences are found in Mount Lyell, Tasmania; Chile; Peru; and Butte, Mont. Bornite may form isometric crystals but occurs most commonly as irregular masses.
.

Under the Agreement, Atna has a 6 month option period to undertake a minimum work expenditure of US$250,000 on an initial work program designed to advance the project through to a Pre-Feasibility Study. After completion of this work, Atna may exercise its option to enter into a 50:50 Joint Venture with the Barreal Seco property Owners. Further, Atna has the right to purchase the Owners' 50% interest for US$5MM payable in 5 equal annual instalments of $1,000,000 commencing 3 months after commercial production or 30 months after Atna exercises it's option during the initial 6 month option period.

Atna is the operator of the Project at all stages of the Agreement and is responsible for arranging the project financing through to commercial production. The right to purchase the Owner's interest becomes an obligation to purchase in the event that Atna determines to make a production decision.

Atna's initial evaluation shows that a minimum 10,000 tpy copper cathode SX-EW mine is economically viable at present market prices. A production decision is expected in mid-2002 and commercial production is within 3 years of the Agreement, assuming that no unexpected delays occur in arranging the necessary permits and financing.

David Watkins, President of Atna said, "I am extremely pleased to have concluded this agreement. It provides Atna with an opportunity to establish a producing mine with positive cash-flow in a short time frame. Atna intends to actively pursue other properties in the area and is planning to use Barreal Seco as a central processing plant acting as a catalyst to unleash the potential of other deposits. We consider that Barreal Seco, with its low entry cost, will provide the first building block to reach our goal of creating a mid-cap mining company. To this end, Atna continues to pursue other attractive strategic acquisitions."
COPYRIGHT 2001 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2001, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Publication:Business Wire
Geographic Code:1CANA
Date:Jun 7, 2001
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