TYLER RESOURCES INC.
TSX VENTURE : TYS

TYLER RESOURCES INC.

October 06, 2005 09:00 ET

Tyler Announces Assay Results for Deep Core Hole #43 at Bahuerachi

CALGARY, ALBERTA--(CCNMatthews - Oct. 6, 2005) -

Highlights include: 320 meters grading 0.42% copper, 0.77% zinc and 10 g/t silver at depth in the Main Zone and 82.1 meters grading 0.74% copper and 3.5 g/t silver in porphyry to the north. First significant CRD massive sulphide mineralization intersected, including 12.70 meters grading 9.5% zinc, 0.30% copper, 40.7 g/t silver, 0.53 g/t gold and 0.93% lead.

Tyler Resources Inc. (TSX VENTURE:TYS) announces assay results for drill holes #41 to #44, at the Bahuerachi project, Mexico, including results for drill hole #43, the first deep core hole of the project drilled to a depth of 476 meters.

Management is very pleased with these results. Drill hole #43 confirmed mineralization at depth and identified new polymetallic high grade zones of mineralization. Drill holes #42 and 44 indicate high grade zones within the porphyry complex and hole #41 points to high grade skarn development at depth in the north. Results to date from all holes continue to expand known mineralization, validate the Company's exploration model and outline bulk tonnage potential.



RESULTS FROM DEEP CORE HOLE #43

Significant intervals for drill hole DDH-BAH #43(1).
------------------------------------------------------------------------
From To Interval Copper Gold Silver Zinc Mo Rock
Hole # (m) (m) (m) (%) (g/t) (g/t) (%) (%) Type
------------------------------------------------------------------------

BAH-43
155.3 476 320.7(1) 0.42 0.06 10.0 0.77 Trace Marble/
(EOH) CRD/Skarn
(2) and calc
silicate skarn
------------------------------------------------------------------------
Including
287.3 332.6 45.30 0.36 0.23 23.9 3.72 Anom- Marble/
alous Massive
sulphide
CRD
------------------------------------------------------------------------
Including
287.3 300 12.70 0.30 0.53 40.7 9.5 Trace Massive
sulphide
CRD
------------------------------------------------------------------------
And
Including
332.6 476 143.4 0.63 0.05 10.3 0.30 0.007 Skarn
(EOH) and calc
(2) silicate
skarn,
minor
massive
sulphide
------------------------------------------------------------------------
------------------------------------------------------------------------


(1) Interpreted true widths of intercepts are estimated as 75-80% of
quoted intervals, see section for details.

(2) Hole ended in mineralization with last 4 meters grading 0.98% copper,
0.07 g/t gold and 9.2 g/t silver.


The results of drill hole #43 outline significant depth potential in the Main Zone (ending in mineralization). Of particular note is the presence of significant intervals of Carbonate Replacement style (CRD) massive sulphide mineralization with high polymetallic metal content. Before intersecting the skarn target, hole # 43 intersected 5 separate CRD style massive sulfide zones with core intercepts ranging from 0.6 to 6.9 m wide. The widest single CRD interval contained 12.8 % Zn, 1.2 % Pb, 53.76 ppm Ag, and 0.73 ppm Au over a core interval of 6.9 m (from 287.3 to 294.2 m depth).

Although the extent and significance of CRD style mineralization is not yet known at Bahuerachi, their presence opens a new dimension for testing of high grade polymetallic targets in close association with the main mineralized skarn and porphyry targets. The CRD intercepts noted in drill hole #43 compare well to width and overall grade of numerous well known Mexican and South American economic CRD producing mines such as Santa Eulalia and San Martin (Mexico), and Yauricocha and Cerro De Pasco (Peru).

RESULTS FROM DRILL HOLES 41, 42, 44.

Ongoing drilling north of this area has also been successful in expanding the footprint of mineralization found to date and has returned the property's first high grade porphyry intersection in both supergene (copper oxide/chalcocite) and hypogene (primary sulphide) types of mineralization in drill hole #44 (see below).



Significant intervals for drill holes DDH-BAH #41, 42 and 44 (partial)

------------------------------------------------------------------------
From To Interval Copper Gold Silver Zinc Mo Rock
Hole # (m) (m) (m) (%) (g/t) (g/t) (%) (%) Type
------------------------------------------------------------------------
BAH-41
30 68.7 28.65(I) 0.22 Calc-
silicate/
skarn/QFP
------------------------------------------------------------------------
And
127.3 155.4 28.1(II) 0.85 0.14 13.5 0.32 0.009 Skarn
------------------------------------------------------------------------
BAH-42
104 114.15 10.15 0.66 Trace 4.95 Trace 0.004 QFP
162 225.4 63.4(III) 0.37 Trace 2.9 Trace 0.011 QFP/
dykes/
skarn
------------------------------------------------------------------------
Including
217.5 225.4 7.9(III) 1.01 Trace 12 trace 0.024 Skarn
------------------------------------------------------------------------
BAH-44
0 172.1 172.1(IV) 0.5 0.05 3.0 none 0.002 Porphyry
/oxide,
minor
sulphides
------------------------------------------------------------------------
Including
20 102.1 82.1 0.74 0.08 4.5 trace Trace Porphyry,
sulphides
------------------------------------------------------------------------
------------------------------------------------------------------------


(I)No core was recovered over a total of 10.05 meters over the interval. Average is based on core recovered and should be considered indicative only.

(II)Core recovery was average to low over the interval. Averages should be considered indicative, not representative until further drilling is performed in the area.

(III) Excludes a 0.3 m interval of no recovery.

(IV)Assays are reported to 172.1 meters. Subsequent to the first pass sampling, the hole was extended to 305.85 meters total depth. Average includes dilution by 19.9 meters of post mineral dykes.

- All intervals are interpreted true widths.

The mineralized QFP in holes 05BAH-42 and 44 is a coarse crowded porphyry with feldspar-quartz-biotite crystals in a fine grained matrix. The rock is variably silicified and quartz veined with potassic alteration overprinted by sericite alteration. Chalcopyrite, pyrite, and lesser bornite and molybdenite occur in quartz veins, disseminated, and along sulfide coated fracture surfaces. The porphyry texture, alteration, and mineralization encountered in holes 05BAH-42 and 05BAH-44 are similar to numerous porphyry-Cu deposits worldwide that contain economic grade mineralization. These holes contain the best zones of hypogene porphyry-Cu mineralization within intrusive rocks encountered on the property to date, and are an indication of the excellent exploration potential within the larger intrusive complex at Bahuerachi.

The upper part of hole 05BAH-42 encountered a post mineral intrusive phase which has resulted in low Cu grades within the first 104 m of the hole.

Also of key importance is an intersection in drill hole #41 which indicates that skarn development may increase in both intensity, widths and grades at depth on the Western edge of the porphyry complex in this area, as has been postulated by the company's geological team. Drill Hole #42 has also confirmed that similar skarn unit developed on the eastern edge of the complex in association with mineralized porphyry.

DRILLING PROGRAM UPDATE

The deep drilling to date has gone smoothly, with excellent recoveries and high production rates. The Company is currently in discussion with several drilling companies to increase its drilling capacity within approximately the next six weeks with the objective of accelerating its current exploration efforts at Bahuerachi.

Deep drilling in the Main Zone is continuing with drill hole #45, located approximately 100 meters south of drill hole #43. Drilling in the north is continuing with drill hole #46. Please refer to the drill hole location plan map attached for the general location of all drill holes and sections.

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. Dustin Rainey, consultants to the Company.

There are maps available on CCNMatthews' website at:

http://www.ccnmatthews.com/docs/1005tys2.jpg

http://www.ccnmatthews.com/docs/1005tys4.jpg

http://www.ccnmatthews.com/docs/1005tys6.jpg

http://www.ccnmatthews.com/docs/1005tys8.jpg




"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.

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