introduction to tri origin minerals ltd, page-104

re: assets and insitu values UPDATED DATA AND CALCULATIONS.

WOODLAWN UNDERGROUND PROJECT RESOURCE ESTIMATE – SML 20
26 Oct 2006: "Tri Origin Minerals Ltd (“Tri Origin”) is pleased to announce its first JORC(1) compliant Measured, Indicated and Inferred resource estimate for the redevelopment of the Woodlawn Underground Project:

10.1Mt @ 1.8% Cu, 4.0% Pb, 10.2% Zn, 0.55 g/t Au, 85g/t Ag.


INSITU VALUATION OF RESOURCE:
Latest US $/lb: CU: 2.40; Pb: 0.76; Zinc: 1.40; Silver: $13.27/ounce. Omit Gold. Shares: 76.93 mill. Options 2009-2011: 5.845 mill. Fully diluted: 82.775 mill. US$1=AUS$1.2911. Share price: AUS$1.35.

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Recalculating the Insitu values/tonne (US$): Cu: 95.04; Pb: 66.88; Zn: 314.16; Silver: 36.26 or the total Insitu value/tonne is US$512.34 or $A661.48/tonne (24.7 grams/tonne Gold equiv. - Ounce of gold= US$644.6). That is a very high value per tonne in situ.

There is 10.1 mill tonnes or total in situ is AUS$6680.97 mill; on a fully diluted basis, that is AUS$80.71/share or per AUS$1 market cap: AUS$59.79, a high number.

There is room for expansion of the resource and the next Jorc update ought to give us that info. The pre-feasibility study planned for Febr 2007 ought to show a very good IRR. (Internal Rate of Return).

Note that these calculations omit the resource of Lewis Ponds.

Subject to audit,

Gerry
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