Atna Expands New Reserve Area
Golden, CO -- Atna
Resources Ltd. ("Atna")
--(TSX:ATN -- OTCBB:ATNAF) is pleased to report new results for drilling
adjacent to the newly designed North Main Briggs pit and in the Deep
Briggs zone. North Main Briggs is a new mining pit developed during last
year's reserve update. Deep Briggs is a previously announced mineralized
zone that lies below the Main Briggs pit. Highlights of the recently
received drill hole assays include:
North Main Briggs
- 55
feet (16.8 meters) grading 0.046 opt gold (1.58 g/t) including 25
feet (7.6 meters) grading 0.079 opt gold (2.72 g/t) in hole number
NMB11-052 and 45 feet (13.7 meters) grading 0.027 opt gold (0.93g/t)
in hole number NMB11-051
Main/Deep
Briggs
- 85
feet (25.9 meters) grading 0.012 opt gold (0.41 g/t) in the East
Wall and 75 feet (22.9 meters) grading 0.017 opt gold (0.58 g/t),
including 15 feet (4.6 meters) grading 0.039 opt gold (1.34 g/t) in
Deep Briggs both in hole number BMD11-065
"The positive drilling results
at North Main Briggs has the potential to rapidly add to existing
minable reserves. North Main Briggs remains open for extension and we
have added seven holes to the drilling plan to test for further reserve
potential. The Briggs Main Deep drilling is also producing very positive
results," said James Hesketh, President
& CEO.
These holes are contiguous with and extend the broad mineralized zones
encountered in the Deep Briggs drilling described in previous press
releases dated February 28, March 22, and April 7, 2011. Drilling at Deep
Briggs is designed to in-fill between existing drill holes and to extend
the mineralized zone along trend.
Detailed Assay Results
|
From-feet (meters)
|
To-feet (meters)
|
* Length-feet (meters)
|
ounces/ton
Au
(grams/tonne Au)
|
Zone
|
NMB11-051
(Azimuth
025, Angle -55)
|
|
|
|
|
100 (30.5)
|
125 (38.1)
|
25 (7.6)
|
0.008 (0.27)
|
North Main Briggs
|
|
140 (42.7)
|
185 (56.4)
|
45 (13.7)
|
0.027 (0.93)
|
North Main Briggs
|
NMB11-052
(Azimuth
055, Angle -50)
|
|
|
|
|
125 (38.1)
|
180 (54.9)
|
55 (16.8)
|
0.046 (1.58)
|
North Main Briggs
|
Including
|
140 (42.7)
|
165 (50.3)
|
25 (7.6)
|
0.079 (2.72)
|
|
|
205 (62.5)
|
235 (71.6)
|
30 (9.1)
|
0.011 (0.38)
|
North Main Briggs
|
|
|
|
|
|
|
BMD11-061
(Azimuth
330, Angle -60)
|
|
|
|
|
0 (0)
|
80 (24.4)
|
80 (24.4)
|
0.014 (0.48)
|
Main Briggs
|
|
130 (39.6)
|
215 (56.5)
|
85 (25.9)
|
0.020 (0.69)
|
Deep Briggs
|
|
280 (85.3)
|
295 (89.9)
|
15 (4.6)
|
0.017 (0.58)
|
Deep Briggs
|
**
|
440 (134.1)
|
490 (149.3)
|
50 (15.2)
|
0.009 (0.31)
|
Deep Briggs
|
**
|
515 (157.0)
|
600 (182.9)
|
85 (25.9)
|
0.010 (0.34)
|
Deep Briggs
|
|
620 (189.0)
|
640 (195.1)
|
20 (6.1)
|
0.015 (0.51)
|
Deep Briggs
|
BMD11-065
(Azimuth
270, Angle -65)
|
|
|
|
|
0 (0)
|
85 (25.9)
|
85 (25.9)
|
0.012 (0.41)
|
Main Briggs
|
including
|
0 (0)
|
45 (13.7)
|
45 (13.7)
|
0.016 (0.55)
|
Main Briggs
|
|
155 (47.3)
|
170 (51.8)
|
15 (4.6)
|
0.013 (0.45)
|
Deep Briggs
|
|
260 (79.3)
|
270 (82.4)
|
10 (3.1)
|
0.031 (1.06)
|
Deep Briggs
|
|
370 (112.8)
|
380 (115.9)
|
10 (3.1)
|
0.015 (0.51)
|
Deep Briggs
|
|
435 (132.6)
|
450 (137.2)
|
15 (4.6)
|
0.016 (0.55)
|
Deep Briggs
|
|
490 (149.4)
|
515 (157.0)
|
25 (7.6)
|
0.019 (0.65)
|
Deep Briggs
|
|
575 (175.3)
|
650 (198.2)
|
75 (22.9)
|
0.017 (0.58)
|
Deep Briggs
|
including
|
585 (178.3)
|
600 (182.9)
|
15 (4.6)
|
0.039 (1.34)
|
|
|
690 (210.3)
|
725 (221.0)
|
35 (10.7)
|
0.012 (0.41)
|
Deep Briggs
|
* Intercept length may not represent true thicknesses of the mineralized
body due to oblique intersection of the mineralized zone by the drill hole.
** Intercepts are preliminary in nature due to poor sample recovery from
440 to 600 feet. Hole has been re-drilled and assays are pending.
Analytical results contained within this press release were completed by
standard fire assay methods with an atomic absorption or gravimetric
finish by Inspectorate America Corporation, an independent, ISO certified, analytical laboratory located in Sparks, Nevada. Atna maintains a rigorous Quality Assurance - Quality
Control (QA/QC) program utilizing both certified gold standards and
blanks to augment Inspectorate's internal QA/QC program.
This press release was prepared under the supervision and review of
William Stanley, V.P. Exploration of Atna, a
Licensed Geologist, and Qualified Person with the ability and authority
to verify the authenticity and validity of information contained within
this news release.
For additional information on Atna Resources
and the Briggs Mine, please visit our website at www.atna.com.
This press release contains certain "forward-looking
statements," as defined in the United States Private Securities
Litigation Reform Act of 1995, and within the meaning of Canadian
securities legislation relating to potential resource or reserve
expansion at the Briggs Mine. Forward-looking statements are statements
that are not historical fact. They are based on the beliefs, estimates
and opinions of the Company's management on the date the statements are
made and they involve a number of risks and uncertainties. Consequently,
there can be no assurances that such statements will prove to be accurate
and actual results and future events could differ materially from those
anticipated in such statements. The Company undertakes no obligation to
update these forward-looking statements if management's beliefs,
estimates or opinions, or other factors, should change, unless required
by law. Factors that could cause future results to differ materially from
those anticipated in these forward-looking statements include: gold
production and operating costs at the Briggs Mine, the Company might
encounter problems such as the significant depreciation of metals prices;
accidents and other risks associated with mining exploration and
development operations; the risk that the Company will encounter
unanticipated geological factors; the Company's need for and ability to
obtain additional financing; the possibility that the Company may not be
able to secure permitting and other governmental clearances necessary to
carry out the Company's exploration and development programs; and the
other risk factors discussed in greater detail in the Company's various
filings on SEDAR (www.sedar.com) with
Canadian securities regulators and its filings with the U.S. Securities
and Exchange Commission, including the Company's 2010 Form 20-F dated
March 23, 2011.
Cautionary Note to U.S. Investors --- The United States Securities and
Exchange Commission permits U.S. mining companies, in their filings with
the SEC, to disclose only those mineral deposits that a company can
economically and legally extract or produce. We use certain terms in this
report, such as "measured," "indicated,"
"inferred," and "resources," that the SEC guidelines
strictly prohibit U.S. registered companies from including in their
filings with the SEC.
FOR FURTHER INFORMATION, CONTACT:
James Hesketh, President and CEO - (303)
278-8464
Valerie Kimball, Investor Relations - toll free (877) 692-8182
www.atna.com
|