EXHIBIT 10.3


                               20 SEPTEMBER, 2005

                            PACIFIC RIM MINING CORP.

                                  (AS ASSIGNOR)

                                       AND

                              TREND MINING COMPANY

                                  (AS ASSIGNEE)

                    ASSIGNMENT OF RIGHT TO REPAYMENT OF LOAN

                                     MADE TO

                                 DMC CAYMAN INC.

                                MAPLES AND CALDER





                               DEED OF ASSIGNMENT
                               ------------------

THIS ASSIGNMENT is made on 20 September, 2005


BETWEEN:

(1) PACIFIC RIM MINING CORP., a British Columbia company, (the "ASSIGNOR"); and

(2) TREND MINING COMPANY, a corporation organized and existing under the laws of
Delaware, (the "ASSIGNEE").

WHEREAS:

(A)      Pursuant to the Agreement (as defined below), the Assignee has agreed
         to acquire the Pacrim Loan (as defined in the Agreement) subject to the
         terms and conditions set out in the Agreement.

(B)      Pursuant to the Agreement, the Assignor hereby enters into this
         assignment of the right to repayment of the Pacrim Loan.

IT IS AGREED as follows:

1        DEFINITIONS AND INTERPRETATION

In this Assignment (except where the context otherwise requires) the following
words and expressions shall have the following meanings:

         "AGREEMENT"            means the share purchase agreement made as of 20
                                September, 2005 between the Assignor and the
                                Assignee;


         "COMPANY"              means DMC Cayman Inc., an exempted company
                                incorporated in the Cayman Islands; and

         "PACRIM LOAN"          has the meaning given in the Agreement.

2        ASSIGNMENT

         The Assignor hereby assigns the right to repayment of the Pacrim Loan
         to the Assignee free and clear of any liens or other third party
         rights. This assignment is to take effect as an absolute assignment
         (and not by way of charge only).

3        ACKNOWLEDGEMENT OF ASSIGNMENT

         The Assignee acknowledges the assignment pursuant to clause 2 above.

4        NOTICE TO COMPANY

         The Assignor hereby undertakes to deliver a copy of this Assignment to
         the Company.

5        GOVERNING LAW

         This Assignment is governed by, and shall be construed in accordance
         with, the law of the Cayman Islands.




                                       2

6        COUNTERPARTS

         This Assignment may be executed in any number of counterparts and all
         such counterparts taken together shall be deemed to constitute one and
         the same instrument.







                                        3

IN WITNESS WHEREOF this Assignment has been executed and delivered as a Deed the
day and year first above written.

EXECUTED AS A DEED AND DELIVERED by         )

PACIFIC RIM MINING CORP.                    )

acting by Catherine McLeod-Seltzer          )  .................................

                                            )

                                            )

                                            )


In the presence of:


______________________Witness

EXECUTED AS A DEED AND DELIVERED by         )

TREND MINING COMPANY                        )

acting by Thomas A. Loucks                  )  .................................

                                            )

                                            )

                                            )


In the presence of:


______________________Witness

1





                                       4


                     ACKNOWLEDGEMENT OF NOTICE OF ASSIGNMENT

To:      Trend Mining Company.
         5439 South Prince Street
         Littleton, Co 80120
         United States

DMC Cayman Inc. hereby acknowledges that it has received express notice in
writing of the absolute assignment by Pacific Rim Mining Corp. to Trend Mining
Company of the right to repayment of the Pacrim Loan (as defined in the Share
Purchase Agreement between Trend Mining Company and Pacific Rim Mining Corp.).





DMC CAYMAN INC.

By: ____________________

Title:___________________

Date:___________________