Excalibur Resources Reports More High Grade Gold Intersections From Underground Sampling at Catanava

Excalibur Resources Reports More High Grade Gold Intersections From Underground 
Sampling at Catanava 
TORONTO, ONTARIO -- (Marketwire) -- 03/08/13 -- Excalibur Resources
Ltd. (CNSX:XBR)(FRANKFURT:X9CN)(WKN A0YJNV) ("Excalibur" or the
"Company") is pleased to provide an update on the sampling program at
the Catanava property in Pinos, Zacatecas State, Mexico. Pinos has
been mined since 1546 and was one of only three bonanza gold
districts discovered by the Spanish in Mexico. It is located along
the historic Fresnillo -- Guanajuato Trend of Mexico, characterized
by world-class precious metals mines. The program includes mapping
and sampling of old mine workings, surface mapping and re-logging and
sampling of drill holes completed by previous operators. The program
is directed at expanding the resources at the Catanava property and
in providing data for mine development planning. 
Highlights of the current sampling program are listed in Table 1.
Assay results from the San Miguel Mine and the Tanous Mine show that
significant gold mineralization remains in the old historic workings.
The San Miguel and Tanous Mines belong to the Cinco Estrellas-Tanous
vein system, a major mineralized trend that extends over a 5 km
distance within the Pinos District and 700 meters on the Catanava
property. The continuity of these high grades zones over significant
strike lengths support the potential and continuity of
mineralization.  


 
Table 1: Highlights of assaying results from the current sampling program,
Catanava Project, Pinos, Zacatecas State, Mexico.
 
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                                                                 Au     Ag
MINE/AREA    WORKING  SAMPLE   WIDTH             DESCRIPTION    g/t    g/t
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                                       Oxidized quartz vein,              
                                           crustiform quartz              
San Miguel   Level 4   31519    0.85                 veinlet   4.97     24
--------------------------------------------------------------------------
                                       Oxidized quartz vein,              
San Miguel   Level 3   31523     0.8              brecciated
   4.67     17
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San Miguel   Level 3   31525     1.2  Quartz vein brecciated   11.8     48
--------------------------------------------------------------------------
San Miguel   Level 3   31529    0.56    Oxidized quartz vein   2.74     36
--------------------------------------------------------------------------
                                       Oxidized quartz vein,              
San Miguel   Level 2   31533     0.9                   blade   5.23     70
--------------------------------------------------------------------------
                                       Oxidized quartz vein,              
San Miguel   Level 2   31535     0.9                   blade   5.52     91
--------------------------------------------------------------------------
                                       Oxidized quartz vein,              
San Miguel   Level 1   31538     0.5                   blade   7.56    106
--------------------------------------------------------------------------
                                           Oxidized breccia,              
San Miguel   Level 1   31540     0.5         angular, quartz   4.91     91
--------------------------------------------------------------------------
                                        Greenish quartz vein              
San Miguel   Level 1   31544     0.5                 ginguro   5.89     50
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                                           Oxidized breccia,              
San Miguel   Level 1   31551     0.3         angular, quartz   7.56     44
--------------------------------------------------------------------------
San Miguel   Level 1   31553    0.94    Oxidized quartz vein   3.49     41
--------------------------------------------------------------------------
San Miguel   Level 1   31554    0.63    Oxidized quartz vein   2.93     42
--------------------------------------------------------------------------
San Miguel   Level 1   31555    0.82    Oxidized quartz vein   3.80     24
--------------------------------------------------------------------------
Tanous      Level 01   31565    0.78    Oxidized quartz vein   3.57     22
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San Miguel Mine: The current sampling program continues to confirm
high grade gold mineralization at Levels 01, 02 and 03 of the past
producing mine. This mineralization is located ranging 20 to 75
meters below surface. The zone is best illustrated in the middle
portion of the workings, where intersections up to 1.2 m @ 11.80 g/t
Au and 48 g/t Ag were obtained. This mineralized ore shoot may
correlate with all levels of the San Miguel Mine and subsurface. The
San Miguel Mine has the most extensive old workings on the Catanava
Property and extends to at least 95 meters depth and over 120 meters
of horizontal drifts. 
Tanous Mine: Sampling carried out previously by Romarco and confirmed
by Excalibur Resource consultants show continuity of high grade gold
mineralization, mainly on Level 03. Intersections up to 0.78 m @ 3.57
g/t Au and 22 g/t Ag were obtained from sampling.  
"Results from the underground sampling of the historic adits of the
Cinco Estrellas - Tanous structure have provided us with an increased
level of confidence in the grade and continuity of the zones of high
grade gold mineralization within the Catanava Property" said Tim
Gallagher, Chairman and CEO of Excalibur Resources. "Further
exploration is needed to properly map and sample the better zones so
that we can plan and prioritize the mine development to access these
areas with the objective of providing a uniform and predictable
stream of broken material to the mill for processing".  
The current exploration results at Catanava have provided valuable
information including:  


 
1.  Support of continuity of the high grade mineralization on the Cinco
    Estrellas - Tanous vein structure between the old mine workings. 
2.  Distribution of gold and silver within the mineralized zones on the
    mineralized structure. 
3.  Mineralization controls, both structural and geological. 
4.  Ground conditions for mine development planning and economics.

 
Next Steps 
Going forward the principal focus of the mining geology department
will be to provide accurate mapping and sampling of all surface
exposures of the known veins along with surveying, mapping and
systematic sampling of all the accessible underground workings. This
will provide the basis of a mineral inventory that will be used in
mine development planning and will be used to help improve our
geological understanding of the mineralized veins so as to better
predict the location of bonanza grade ore shoots within the property.
To accomplish this, a mine grid will be established on the Catanava
Property and all surface features will be relocated using
differential GPS. All the surface entrances to shafts, adits and
declines will be surveyed along with all accessible underground
workings to provide adequate location accuracy for mine planning
purposes. 
Sampling Program Description and QA/QC 
Sampling within the underground workings includes continuous channel 
sampling, taken in compliance with the Company's QA/QC protocol.
Samples are analyzed for gold, silver and trace elements at the ALS
Chemex laboratory. The vein exposures are sampled in channels
perpendicular to the strike of the structure, with the widths of the
individual samples determined by the mineralization and alteration.
Sample stations include one to four continuous channel samples, with
the hanging wall, vein and footwall mineralization separated into
individual samples. Minimum sample width was 0.3 meters and maximum
was 2.4 meters. Sample widths reported are true thicknesses except
for horizontal crosscut samples which are approximately 80-100% of
true thickness. Duplicate channel samples were occasionally collected
and blanks and certified pulp standards were inserted as per the
company's protocol. 
Charles Beaudry, P.Geo. is a "Qualified Person" for the purpose of
National Instrument 43-101, and has reviewed and approved the
technical contents of this news release. 
Excalibur Resources Ltd. is a junior exploration mining company
focused on the discovery, development and mining of economically
viable precious metal mineral resources. 
On behalf of the Board of Directors: 
Tim Gallagher, Chairman & CEO 
Neither the Canadian National Stock Exchange nor its Regulation
Services Provider accepts responsibility for the adequacy or accuracy
of this release. 
Contacts:
Excalibur Resources Ltd.
Tim Gallagher
Chairman & CEO
416-987-0298
info@excaliburresources.ca
www.excaliburresources.ca