AGREEMENT for the PURCHASE AND SALE of MINING CLAIMS

                                    AGREEMENT
                                     for the
                                PURCHASE AND SALE
                                       of
                                  MINING CLAIMS



THIS  AGREEMENT FOR THE PURCHASE AND SALE OF MINING  CLAIMS,  made and effective
this sixth day of March,  1997 by and between  Kintana  Resources Ltd. a British
Columbia corporation whose address is 505 - 1111 West Georgia Street, Vancouver,
British  Columbia,  (Seller),  and  Silverado  Mines  Ltd.  a  British  Columbia
corporation whose address is 505 - 1111 West Georgia Street, Vancouver,  British
Columbia, (Buyer),

WITNESSETH:

WHEREAS,  Seller is the owner of  certain  State of Alaska  mining  claims  (the
Claims) located near Fairbanks,  Alaska, subject to certain obligations to Buyer
as well as the  interests of other parties the details of which are set forth in
Exhibit A attached hereto and incorporated herein by reference; and

WHEREAS,  Seller  wishes to sell and Buyer wishes to buy the Claims on the terms
hereinafter set forth,  all subject to the express  approval of the shareholders
of Kintana;

NOW THEREFORE,  in consideration of these premises, and the mutual promises made
herein, the parties agree as follows:

1.   GRANT Seller hereby grants unto Buyer all right, title and interest it has,
     if any, in those certain State of Alaska mining claims more as  extensively
     described in Exhibit A.

2.   PURCHASE PRICE The purchase price for the Claims shall be $565,000 composed
     of the following items:

     a)   Buyer shall assume all assets and liabilities of Seller, and

     b)   Buyer  shall  distribute  to  Seller a number  of shares of its no par
          value,  unrestricted,   free-trading  stock  in  accordance  with  the
          provisions of the proxy statement  distributed to the  shareholders of
          Seller in conjunction with an extra-ordinary meeting of the Members of
          Kintana  Resources  Ltd.  to be held on or about May 21,  1997,  which
          number of shares will be equal to the difference  between the $565,000
          and the total for which all  liabilities of Kintana can be discharged,
          assuming a value of the said stock to be $0.375 (U.S.) per share.






3.   DISSOLUTION OF KINTANA

          Upon the  conclusion of this  transaction  and the  disposition of its
          assets and liabilities, Kintana Resources Ltd. shall then be dissolved
          pursuant to Section 282 of the Company Act of British Columbia.

4.   MISCELLANEOUS

     a)   This Agreement  constitutes the entire  agreement  between the parties
          and  supersedes  and  replaces all other  agreements,  oral or written
          relating to the subject matter hereof.

     b)   This Agreement  shall be  interpreted  in accordance  with the laws of
          British Columbia.

     c)   This  Agreement  shall inure to the benefit of and be binding upon the
          Parties hereto and their respective successors and assigns.

     d)   Time is of the essence in this Agreement


IN WITNESS OF WHEREOF, the Parties have set their hands and seals on the day and
year first above written at Vancouver, British Columbia.



KINTANA RESOURCES LTD.                               SILVERADO MINES LTD.





By:  /s/ Xxxxx X. Xxxxxxx                       By:  /s/ Xxxxx X. Xxxxxxx
     ---------------------------                     ---------------------------
     Xxxxx X. Xxxxxxx, President                     Xxxxx X. Xxxxxxx, President