TYLER RESOURCES INC.
TSX VENTURE : TYS

TYLER RESOURCES INC.

July 28, 2005 16:15 ET

Tyler Resources Announces New Near Surface Copper Oxide Zone at Mina Mexicana Including 117.3 meters Grading 0.31% Copper and 4.2 g/t Silver

CALGARY, ALBERTA--(CCNMatthews - July 28, 2005) - Tyler Resources Inc. (TSX VENTURE:TYS) is pleased to announce assay results for drill holes #34 to 37 from the Mina Mexicana and Smelter Zones of its Bahuerachi project, Mexico.

Results from the initial drill testing of Mina Mexicana have returned wide sections with near surface copper oxide mineralization with grades and widths that continue to outline bulk tonnage potential in new zones peripheral to the Main Zone.



Significant intervals for drill holes DDH-BAH #34 to 35.

------------------------------------------------------------------------
From To Interval Copper Gold Silver Zinc Mo
Hole # (m) (m) (m) (%) (g/t) (g/t) (%) (%) Rock Type
------------------------------------------------------------------------
MINA
MEXICANA
------------------------------------------------------------------------
BAH-34 2 119.3 117.3 0.31 0.02 4.2 Trace Trace Sediments/
Skarn/
Oxides/
minor QFP
------------------------------------------------------------------------
Including
26.95 64 37.05 0.50 0.03 4.2 Trace Trace As above
------------------------------------------------------------------------
BAH-35 0 99 99 0.33 0.02 4.7 Trace Trace Sediments/
Skarn/
Oxides/
minor QFP
------------------------------------------------------------------------
Including 21 55 34 0.51 0.03 6.01 Trace Trace As above
------------------------------------------------------------------------
SMELTER
ZONE
------------------------------------------------------------------------
BAH-36 29 32.6 3.6 0.58 0.15 9.36 0.32 Iron oxide
breccia
------------------------------------------------------------------------
And 80 90 10 0.16 1.4 0.024 QFP
------------------------------------------------------------------------
BAH-37 15.25 30 14.75 1.00 0.04 3.4 0.20 Iron oxide
breccia
and
brecciated
andesites
------------------------------------------------------------------------


Drill holes BAH-34 and 35 have confirmed the presence of extensive mineralization to the south west of the main zone. The first pass drilling at Mina Mexican has outlined more areas of mineralization with attractive near surface copper oxide grades which contribute to the overall Main Zone porphyry target and warrant more surface and drilling work. Holes 34 and 35 were drilled from the same collar location at slightly different azimuth (see map). Due to the interpreted geometry of the mineralized zone at this time, intercepts are believed to be approximately 80% true width. Further drilling is justified in this area as the exploration schedule permits and sections will be generated once sufficient information is available on this target.

Drill holes BAH-36 and 37, tested a narrow surface mineralized interval which was the subject of historical mining as evidenced by adits and smelting activity on site. Results have confimed polymetallic mineralization of potential economic interest in this area which has later been cut by complex dyke emplacement. Reported mineralized intervals are interpreted true widths. The results support that significant mineralization is present in this location and further surface work will be undertaken to outline areas with potential for wider mineralized sections.

The Company is also pleased to announce the signing of final contracts for an additional 6,000 meters of drilling with a second core drilling rig. The additional diamond drilling equipment, capable of drilling deeper holes, is expected to be mobilized on site in mid August.

Drilling is currently ongoing in the Main Zone with drill hole #39, which is part of a series of holes being drilled as a large step out along strike of the Main Zone to the north, located approximately 600 meters from section 2NE. After review of analytical data and recoveries for drill hole #33 on section 2 NE, the company has opted to redrill this hole to obtain better controls on recovery for mineralized intersections seen in core and obtain reliable composite grade intervals.

Please refer to the drill hole location plan map attached for the general location of all drill holes and sections: http://www2.ccnmatthews.com/database/fax/2000/728tys1.jpg

All assay work was performed by ICP at ALS-Chemex labs of Vancouver, with gold done using standard fire assay methods. All samples sent to the lab are sealed with security tags for delivery to ALS-Chemex. Duplicate samples as well as standards and blanks are inserted in each batch of samples delivered to the laboratory and then checked to ensure proper quality assurance and quality control (QA/QC).

The Qualified Person responsible for the design and implementation of the Field Program as well as the preparation of this news release was J. P. Jutras, P.Geol., and President of the Company. The work program was carried out with the participation of Dr. Shane William Ebert, Ph.D, P.Geo and Director, Mr. Brent Gonek, B.Sc, Geology, G.I.T., and Mr. Paul Turnbull, P.Geol, consultants to the Company.

"Jean Pierre Jutras"

Jean Pierre Jutras President/COO

All statements, other than statements of historical fact, in this news release are forward-looking statements that involve various risks and uncertainties, including, without limitation, statements regarding the potential extent of mineralization and reserves, exploration results and future plans and objectives of Tyler Resources Inc. These risks and uncertainties include, but are not restricted to, the amount of geological data available, the uncertain reliability of drilling results and geophysical and geological data and the interpretation thereof and the need for adequate financing for future exploration and development efforts. There can be no assurance that such statements will prove to be accurate. Actual results and future events could differ materially from those anticipated in such statements. These and all subsequent written and oral forward-looking statements are based on the estimates and opinions of management on the dates they are made and are expressly qualified in their entirety by this notice. The Company assumes no obligation to update forward-looking statements should circumstances or management's estimates or opinions change.

The TSX Venture Exchange has neither approved nor disapproved of the contents of this press release.

Contact Information

  • Tyler Resources Inc.
    Jean Pierre Jutras
    (403) 269-6753
    or
    Tyler Resources Inc.
    James Devonshire
    (403) 269-6753
    or
    Tyler Resources Inc.
    #500, 926 - 5TH Avenue S.W.
    Calgary, Alberta T2P 0N7
    (403) 269-6753
    (403) 266-2606 (FAX)
    Website: www.tylerresources.com