[Letterhead of Minera Rio Tinto, S.A. de C.V.]
Sunburst Acquisition IV Inc.
Suite 300 - 000 Xxxx Xx.
Xxxxxxxxx XX X0X0X
Dear Sirs:
Re: Joint Venture Agreement between Sierra Minerals & Mining Inc. and
Minera Rio Tinto, S.A. de C.V. (the "Joint Venture Agreement")
This letter will confirm our agreement wherein, for good and valuable
consideration, the receipt and sufficient of which is acknowledged by each of
us, we have agreed to amend the Joint Venture Agreement so as to provide the
date of the "Initial Investment" (as defined in the Joint Venture Agreement")
provided for in Section 2.3(a) of the Joint Venture Agreement is extended to
November 10th, 2004. We also confirm that Sunburst will have the obligation to
secure a $2,000,000 line of credit by November 30th, 2004.
If Xxxxxxxx is unable to make the mentioned contribution on time, the provision
stated on clause 3 will apply.
We confirm that the Joint Venture Agreement, amended as detailed above,
continues in full force and effect.
Yours truly,
Dated the 1 day of October
Minera Rio Tinto, S.A. de C.V.
Pre: /s/ Xxxxx Xxxx
Xxxxx Xxxx - Administrador Unico
