Joint Venture Agreement

1.

Upon the signing of this Agreement, RAVEN agrees to purchase 25% of Tara’s interests in the La Currita Groupings by completing the following;

a)

Make a non-refundable payment of US$75,000.00, coinciding with the signing of this Agreement (the payment will be refundable if a satisfactory title search is not secured by RAVEN from Tara by August 17, 2006);

c)

Make a payment of US$150,000.00 by October 17, 2006;

e)

RAVEN must issue to Tara 250,000 Rule 144 restricted common shares.

a)

Make available a certified copy of title for the La Currita Groupings as soon as one is received or no later then August 17, 2006.

2.

RAVEN agrees to make all property payments and any other payments deemed necessary to maintain the properties and keep in good standing the full interest in the La Currita Groupings and continue to make these payments as long as the Joint Venture outlined in this agreement is in effect. Payments will be escrowed for payment at least 14 days before payment is due.

3.

RAVEN will make an additional payment of US $100,000.00 on every anniversary date of this agreement to maintain its interests earned, and to keep the Joint Venture in good standing.

4.

On a monthly basis, the net operating revenue derived from La Currita will be distributed at the interest level earned, according to the overall terms of this agreement, by each party on the last day of the month during which the revenue was generated.

5.

Raven will have the right to invest up to a maximum of $500,000.00 Start-Up Capital, which is unrelated to any payments or expenditures within this agreement, under special terms. Whereby the investment will be paid back out of net operating revenue at a rate higher then the current interest earned. On a monthly basis, 60% of the net operating revenue derived from La Currita, will be set aside and credited or paid out to Raven towards recovery of the Start-Up Capital investment by Raven. The remainder of the net operating revenue derived from La Currita, during the recovery of the Start-Up Capital phase, will be distributed to Tara. Once the full amount of the Start-Up Capital has been recovered from the 60% set aside, the revenue sharing will revert back to the interest that has been earned according to the overall terms of this agreement.

6.

RAVEN may increase its interest in the La Currita project to 40% thereby reducing Tara’s interest in the La Currita Groupings to 60%, after first notifying Tara of RAVEN’s intentions and after the following conditions have been met:

a.

RAVEN spends an additional US$1.0 million, over and above the Start-Up Capital, on exploration and development within 18 months of the date this agreement is signed. Tara agrees that RAVEN will be the operator overseeing the additional US$1.0 million expenditure; however, Tara may have it representatives on location at any and all times to observe all operations, and may audit expenditures as necessary;

b.

RAVEN will supply the expertise and expenditures, within the amount outlined in 6)a., necessary to achieve monthly production at the La Currita Processing Plant of 4,500 tons per month for 3 consecutive months and maintain ongoing production of a minimum of 4,000 tons per month;

c.

Once RAVEN has notified Tara in writing, along with supporting documents, that it has spent US$1.0 million in exploration work on La Currita, the Joint Venture Partners agree to enter into a standard joint venture agreement by which it will have a 40% working interest in the La Currita Group