RIO GRANDE UPDATE
Vancouver, British Columbia – Mansfield Minerals
Inc. (TSX – MDR)
March 26, 2008
Mansfield
Minerals Inc. (the
“Company”) announces final drilling results
on its 50% owned Rio Grande project located in Salta Province, northwestern
Argentina. Holes RGA-07-57 to RGA-07-62 and RGA-07-32A are the remaining
results generated from the 35 hole drill campaign which included highlights as
follows.
- RGA-07-34 (Sofia North Zone): 189 m with 0.70% Cu
and 0.67 g/t Au
- Includes 27 m with 1.16% Cu and 1.59 g/t Au
- Includes 12 m with 2.2% Cu and 1.85 g/t Au
- RGA-07-40 (Discovery Zone): 102 m with 0.58% Cu,
0.75 g/t Au, and 13.1 g/t Ag
- Includes 25 m with 1.37% Cu, 1.89 g/t Au, and 18.0
g/t Ag
- RGA-07-43 (North Zone): 151 m with 0.40% Cu, 0.46
g/t Au, and 12.4 g/t Ag
- RGA-07-56 (#7 Zone): 135 m with 0.53% Cu, 0.65
g/t Au, and 8.9 g/t Ag
- Includes 48 m with 0.82% Cu, 1.28 g/t Au, and 8.7
g/t Ag
This 35 hole campaign
was designed as a scout program to establish the extent of copper-gold
mineralization present at Rio Grande. Given the wide spread spacing of
the drill holes and the number of strong intercepts, management is confident
that Rio Grande has a large metal budget. A 15,000 metre follow-up drill
campaign is currently being executed by Antares Minerals Inc.
(“Antares”), and is designed as a step-out program focused on the
#7, Sofia, Sofia-Discovery and North zones.
Results from the final
7 holes of the previous program are as follows.
|
Drill Hole
Number
|
Zone
|
Interval
|
Length
|
Copper (%)
|
Gold
(g/t)
|
Silver
(g/t)
|
|
RGA-07-57
|
Sofia
North
|
312-332 m
414-432 m
|
20 m
18 m
|
0.30
0.36
|
0.33
0.34
|
3.1
9.3
|
|
RGA-07-58
|
#7
|
9-170 m
incl. 112-128 m
incl. 144-156 m
and 309-350 m
|
161 m
16 m
12 m
41 m
|
0.34
0.65
0.47
0.21
|
0.32
0.72
0.61
0.25
|
3.2
5.2
5.5
15.4
|
|
RGA-07-59
|
#7
|
6-22 m
and 57-71 m
and 88-108 m
and 116-153 m
incl. 138-148 m
and 190-214 m
and 256-266 m
and 553-585 m
|
16 m
14 m
20 m
37 m
10 m
24 m
10 m
32 m
|
0.55
0.33
0.26
0.54
1.07
0.24
0.24
0.18
|
0.48
0.37
0.28
0.54
1.15
0.21
0.23
0.30
|
6.4
2.3
2.3
7.7
19.5
2.6
3.4
4.1
|
|
RGA-07-60
|
Sofia
|
242-349 m
incl. 299-336 m
|
107 m
37 m
|
0.42
0.64
|
0.33
0.48
|
5.9
6.3
|
|
RGA-07-61
|
Southwest
|
No significant intervals to report - drill hole lost prior
to target depth.
|
|
RGA-07-62
|
Northeast
|
96-108 m
225-251 m
262-276 m
|
12 m
26 m
14 m
|
0.05
0.14
0.11
|
0.16
0.13
0.08
|
1.5
4.8
1.2
|
|
RGA-07-32A
|
Discovery
|
308-346 m
364-374 m
|
38 m
10 m
|
0.25
0.37
|
0.18
0.32
|
pending
|
*intervals
have been rounded to the nearest metre.
In
addition to the copper-gold mineralization encountered in holes RGA-07-57 and
RGA-07-60, significant molybdenum mineralization was also noted (83.4 m with
0.054% Mo from 107-190 m in RGA-07-57 and 56 m with 0.033% Mo from 400-456 m in
RGA-07-60). Follow-up drilling in this portion of the deposit will be
required to determine the extent of the molybdenum mineralization.
A map of
the drill hole locations has been posted on the Company’s website and can
be viewed at http://www.mansfieldminerals.com/s/RioGrande.asp
Security
– Chain of Custody and Quality Control
Antares’
security, chain of custody and quality control is described on their website
and can be reviewed at: http://www.antaresminerals.com/BestPractices/SamplingMethodologies/tabid/88/Default.aspx
This news release has
been reviewed by Gordon P. Leask, P.Eng., President of the Company, and a
Qualified Person (“QP”) as defined by National Instrument 43-101
(Standards of Disclosure for Mineral Projects).
About Mansfield Minerals Inc. Mansfield
is a mining exploration company which has focused its activities in
northwestern Argentina since August 1994. The Company’s current
significant properties and projects consist of mineral rights covering
approximately 170 square miles in three Argentine provinces and one Canadian
province. The Company is currently focused on two primary projects which
include Lindero (gold) and Rio Grande (copper-gold).
On behalf of the Board of Directors,
“Gordon P.
Leask”
Gordon P. Leask., P.Eng.
President
For more information
please visit our website at www.mansfieldminerals.com
or contact Nancy Goertzen at (604) 681-4462.
The TSX Venture does
not accept responsibility for the adequacy or accuracy of this release. Caution
Regarding Forward-Looking Statements - This news release contains certain
forward-looking statements, including statements regarding the business and anticipated
financial performance of the Company. These statements are subject to a number
of risks and uncertainties. Actual results may differ materially from results
contemplated by the forward-looking statements. When relying on forward-looking
statements to make decisions, investors and others should carefully consider
the foregoing factors and other uncertainties and should not place undue
reliance on such forward-looking statements. The Company does not undertake to
update any forward looking statements, oral or written, made by itself or on
its behalf.