Document:

Additional Clause to the Lease Agreement

 Exhibit 10.49 
  
 TRA.0418-05/N 
  
 EMPRESA MINERA DEL CENTRO DEL PERÚ S.A. 
  
 OL-CA-216-2004  
  
 ADDITIONAL CLAUSE TO THE LEASE AGREEMENT GSG-OLP-C-177-2003 
  
 WITNESSETH HEREBY the Additional Clause to the Lease Agreement GSG-OLP-177-2003 entered into by and between Empresa Minera del Centro del
Perú S.A. – CENTROMÍN PERÚ S.A., identified by Tax ID Number (RUC) 20100176531, and registered office at Av. Javier Prado Este 1975, San Borja, acting by and through its General Manager, Juana Rosa DEL CASTILLO
VALDIVIA, identified by National Identity Card (DNI) 105513338, as per the power of attorney entered in Electronic Item 11009323 of the Registry of Companies in and for Lima, hereinafter referred to as CENTROMÍN, and Minera
Perú Copper Syndicate S.A. with Tax ID Number (RUC) 20506675457 and registered office at Calle Morelli 109, 5to Piso, San Borja, acting by and through its Exploration Manager, Ángel ÁLVAREZ ANGULO, identified by National
Identity Card (DNI) 07276927, as per the power of attorney entered in Entry C 00002 of Electronic Item 11532703 of the Registry of Companies in and for Lima, hereinafter referred to as THE LESSEE, in the following terms and conditions:

  
 RECITALS 
  
 On July 14, 2003, CENTROMÍN and THE LESSEE entered into the Lease Agreement
GSG-OLP-C-177-2003 through which CENTROMÍN leased the immovable property contained in Clause Two of the Agreement referred to herein located in the Tucto-Morococha Residential Area. 
  
 Through Communication GER-EXPL-038-2004, THE LESSEE requested the renewal of the agreement
under the same originally agreed to conditions. 
  
 Through Agreement 44-2004 held
on Meeting 22-2003 dated on July 24, 2003, and Agreement 17-2004 held on Meeting 06-2004 dated on March 10, 2004, the Board of Directors of CENTROMÍN authorized its administration to renew Lease Agreement GSG-OLP-C-177-2003, as well as the
immovable property located in the Tuctu-Morococha area in the conditions and considerations contained in the Additional Clause OL-CA-038-2004 that expired on September 30, 2004. 
  
 Through Agreement 48-2004 of Meeting 24-2004 of its Board of Directors dated October 20, 2004, Centromín Perú S.A. authorized
its administration to renew the Agreement subject matter herein to be entered into through this document in the following terms and conditions: 
  
 CLAUSE ONE: EXTENSION OF THE TERM 
  

The parties agree to extend through the execution of this document the term of the Main Agreement for an additional period of twelve (12) months which will enter into

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 effect as from October 1, 2004 and expire automatically on September 30, 2005 without the need of a prior notice. This term can be renewed by express agreement of the
parties. 
  
 CLAUSE TWO: CONSIDERATION 
  
 The consideration agreed to for the extension of the Lease Agreement entered hereunder is a
monthly rental of S/.7,000 (Seven Thousand Nuevos Soles) excluding VAT, to be paid as set forth in the Main Agreement. 
  
 The other clauses contained in the Main Agreement, as well as the additional clauses that are not contrary to this document shall remain unchanged and in full force and
legal standing. 
  
 IN WITNESS WHEREOF, this document is executed in two (2)
counterparts all with the same tenor in the city of Lima, this 29th day of October 29, 2004. 
  

							
	CENTROMÍN PERÚ S.A.	 	THE LESSEE
				
	 (By)
	 	 (signed)
	 	 (By)
	 	 (signed)

	 Juana Rosa Del Castillo Valdivia
	 	 	 	 Angel Álvarez Angulo

	 General Manager
	 	 	 	 Exploration Manager

			
	 (signed)
	 	 	 	 
	 Antonio Montenegro Criado
	 	 	 	 
	 Attorney-at-law
	 	 	 	 

 Lima Bar Association Register Number 19338 
  
 (illegible signature) Seal 
  
 IH/MA/MCP 
 270418K5.20Lease Agreement between Eneida Enriquez Goycochea and Minera Peru Copper

 Exhibit 10.50 
  
 TRA.0415-05/N 
  
 LEASE AGREEMENT 
  
 WITNESSETH HEREBY the document issued in two (2) counterparts, whereby legal and binding force is given to the LEASE AGREEMENT entered into by and between Eneida ENRIQUEZ
GOYCOCHEA, identified by National Identity Card (DNI) 09279669, married to Alfred Michael HERBERT HOFFMANN, identified by Passport 1300078696, with usual residence at Monte Umbroso 580, Departamento 202, Chacarilla del Estanque, Santiago de Surco,
hereinafter referred to as THE LESSOR, and MINERA PERÚ COPPER SYNDICATE S.A., identified by Tax ID Number (RUC) 20506675457, with registered office at Morelli 109, 5to. Piso, San Borja, acting by and through by Angel ÁLVAREZ
ANGULO, engineer, identified by National Identity Card (DNI) 07276927, as per power of attorney filed with the Registry of Companies of the Public Records Office in and for Lima under Entry 11532703, hereinafter referred to as THE LESSEE,
under the following terms and conditions: 
  
 ONE: THE
LESSOR hereby leases to THE LESSEE the apartment owned by her, located at Av. San Borja Norte 1302, District of San Borja, Province and Department of Lima, and duly filed with the Real Estate Property in and for Lima under Card 41764988.

  
 TWO: THE LESSOR hereby leases to THE LESSEE the
apartment mentioned in the preceding clause to be used as administrative offices and as dwelling, being strictly prohibited to use it for purposes other than the aforementioned one. Therefore, THE LESSEE may not sublease the real
property subject matter hereof, either in whole or in part, neither may THE LESSEE convey it to third parties. Failure to comply with these obligations shall give rise to the automatic termination of this Lease Agreement. 
  
 THREE: The term hereof is ONE (01) calendar year for both parties,
starting from April 10, 2004 and ending on April 9, 2005, being binding upon both parties. This Agreement may be renewed upon expiry of the term thereof for one additional year, for which purpose THE LESSEE shall send a notarized letter to
THE LESSOR at least three (3) months in advance of the expiry of the term hereof. 
  
 FOUR: The monthly rental mutually agreed is US$1,800 (One Thousand Eight Hundred US Dollars) for the entire year, which shall be paid by means of a check drawn to the order of Eneida ENRIQUEZ
GOYCOCHEA on the first day of each month and without prior request. 
  
 FIVE: Should THE LESSEE fail to pay the monthly rental in a timely manner, THE LESSEE shall pay a penalty of US$20 (Twenty US Dollars) per each day of delay, starting from the fifth day of each month. The
penalty shall be paid together with the monthly rental. THE LESSOR shall deliver to THE LESSEE the receipt evidencing payment of the monthly rental within three (3) days following the date stated in the tax calendar of the National
Superintendency of Tax Administration (SUNAT) and once the respective amount has been credited to the bank account stated in Clause FOUR, prior delivery of a copy of the bank deposit slip. 

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 SIX: Failure to pay two (2) consecutive monthly rentals shall give rise to the termination hereof. THE LESSOR may evict THE LESSEE,
collect the rentals accrued and demand a compensation for the damages caused by the noncompliance with this clause. 
  
 SEVEN: THE LESSEE represents that it has received the apartment in good order and repair, with its complete services, as detailed in the attached
inventory, which forms an integral part hereof as EXHIBIT 1, and undertakes to return it in the same conditions as received, except for the normal wear and tear. It is the responsibility of THE LESSEE to maintain the real property in
good order and repair, promptly making any electrical repairs required by the water and sewage pipes and for any minor damages caused by the normal wear and tear or an undue use. 
  
 Moreover, THE LESSEE shall be exclusively responsible for any failure or damage to the real property and/or its facilities, caused
either by a mistake, negligence or fraud attributable to THE LESSEE and/or the persons under its care or service. 
  
 EIGHT: THE LESSEE may only make modifications to the leased real property with the prior consent of THE LESSOR, which shall be made on the
exclusive account of THE LESSEE and under the supervision of a licensed competent professional, who shall ensure that neither the structure nor the aesthetics of the real property shall be affected. Any improvement shall inure to the
benefit of the apartment, except for those improvements that may be dismantled without damaging the property, and THE LESSOR shall not be under the obligation to make any payment or reimbursement therefor. Upon expiry hereof, THE
LESSEE must remove, on its own account, all modifications and installations made by it with the authorization of THE LESSOR and must return the real property in the same conditions as received, unless otherwise agreed with THE
LESSOR. 
  
 NINE: THE LESSOR does not assume any
responsibility for any accident that may occur inside the real property and this responsibility shall be solely and exclusively assumed by THE LESSEE. 
  
 TEN: THE LESSEE shall bear the payment of the services of electricity, water, cable, Internet, surveillance, municipal
police, parks and gardens, municipal taxes, citizenship’s safety and all taxes, either created or to be created during the term hereof, affecting the use of the real property. THE LESSOR shall pay the Property Tax or any other levy,
either created or to be created, for which it is liable. 
  
 ELEVEN: It is expressly and formally agreed that, if THE LESSEE desires to terminate this Agreement prior to the expiry of the stipulated term, THE LESSEE must notify this fact by means of a written
notarized letter at least thirty (30) days in advance. Furthermore, THE LESSEE binds itself to pay the amount corresponding to two (2) rentals as compensation for loss of profit and on account of all respective items. 
  
 TWELVE: Should THE LESSEE fail to vacate the real property after
expiry of the term established in Clause Three without the parties having agreed in writing on the renewal thereof, THE LESSEE undertakes to pay, in addition to the monthly rental stated in 

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 Clause Four and as penalty, the amount of US$80 (Eighty US Dollars) per day during the time the real property continues to be occupied, without prejudice to the right of
THE LESSOR to file the pertinent legal actions seeking to obtain the immediate eviction of the property. 
  
 THIRTEEN: Upon execution of this Agreement, THE LESSEE shall deliver to THE LESSOR the amount of US$3,600 (Three Thousand Six Hundred
US Dollars) as guarantee deposit and the amount of US$1,800 (One Thousand Eight Hundred US Dollars) as advance payment for one monthly rental, by means of checks drawn to the order of Eneida ENRIQUEZ GOYCOCHEA, as expressly indicated by THE
LESSOR. This payment shall be considered final and this constitutes an agreement contrary to the provisions of Article 1233 of the Civil Code. The guarantee shall be used to back up the fulfillment of any and all the obligations assumed
by THE LESSEE hereunder. The guarantee shall be returned to THE LESSEE without interest upon expiry of this Lease Agreement, previously verifying that the real property is in perfect conditions and that all the services have been paid.

  
 FOURTEEN: Both parties expressly agree to submit
themselves to the jurisdiction of the Judges in and for Lima for all purposes hereof, establishing as the registered office of THE LESSOR that indicated in the introduction of this Agreement and as the registered office of THE LESSEE
the address of the real property subject matter hereof, that is, San Borja Norte 1302, San Borja, which may not be changed without prior notice sent by notarial means. If a change of address is not notified as indicated, any and all
communications and judicial and notarized notices sent to the domicile validly designated in this Clause shall be deemed to have been validly delivered. 
  
 FIFTEEN: It is the exclusive responsibility of THE LESSEE to carry out all the required formalities and make all the required payments before
the Municipality of San Borja and other national authorities to be granted the operating license for the proper operation of the administrative offices. THE LESSOR shall collaborate with THE LESSEE by carrying out the
formalities for which she is liable in her capacity as the owner of the real property. 
  
 Either of the parties may request that this Agreement be converted into a Notarially Recorded Instrument. 
  
 SIXTEEN: THE LESSOR shall deliver the real property to THE LESSEE on April 10, 2004. 
  
 IN WITNESS WHEREOF, the parties hereto signed this Agreement in two (2)
counterparts this 10th day of April, 2004. 
  
 THE LESSOR 
  

			
	 (BY)
	  	 
	 (signed)
	  	Eneida Enriquez Goycochea
	 (signed)
	  	Alfred Michael Herbert Hoffmann

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 THE LESSEE 
  
 (By) (signed) Ángel Álvarez Angulo 
  
 BA/MA/mcp 
 270415K5.20 

 EXHIBIT 1 
  
 LIST OF ASSETS - Rented Office, San Borja Norte 1302 
  

			
	Department:	 	Finance & Accounting
	Prepared by:	 	Andrea Vizcarra

  

							
	 Number

	    	Code

	    	 Description

	  	 Location/Office

	 1
	    	O-0001	    	 Cabinet, 8 doors, 20 divisions and 4 drawers in wood colour
	  	Mr. De Olazabal
	 2
	    	O-0002	    	 Liquid soap dispensor
	  	Ladies bathroom (1st floor)
	 3
	    	O-0003	    	 Extractor bell
	  	Kitchen
	 4
	    	O-0004	    	Cabinet fixed in a wall with 14 glass doors, 14 wood doors, 8 beige drawers with divisions and 2 lavatories	  	 
	 5
	    	O-0005	    	 Water pump
	  	Garage
	 6
	    	O-0006	    	 Garage door’s remote control
	  	Garage
	 7
	    	O-0007	    	 Bryan water heater
	  	Laundry
	 8
	    	O-0008	    	 Yellow cabinet with 14 doors
	  	Laundry
	 9
	    	O-0009	    	 Majolica ware lavatory with 2 pipes
	  	Laundry
	 10
	    	O-0010	    	 Alarm system, doors
	  	Security
	 11
	    	O-0011	    	 Desktop with 2 drawers and 1 division
	  	Security
	 12
	    	O-0012	    	 Straw chair
	  	Security
	 13
	    	O-0013	    	 Liquid soap dispensor
	  	Mens bathroom (1st floor)
	 14
	    	O-0014	    	 General Electric air conditioner (2)
	  	Offices
	 15
	    	O-0015	    	 Ceiling fan
	  	Mr. Preble
	 16
	    	O-0016	    	 Beige closet with 14 doors, 7 drawers and 3 divisions
	  	Mr. Preble
	 17
	    	O-0017	    	 Beige closet with 17 doors, 8 drawers and 6 divisions
	  	Haymee
	 18
	    	O-0018	    	 Bathroom cabinet with 3 doors and 2 corners
	  	Bathroom
	 19
	    	O-0019	    	 Big square style mirror
	  	Bathroom
	 20
	    	O-0020	    	 Closet with divisions
	  	Hall (2nd floor)
	 21
	    	O-0021	    	 General Electric air conditioner
	  	Mr. Lowell
	 22
	    	O-0022	    	 Bathroom cabinet with mirror
	  	Bathroom (3rd floor)
	 23
	    	O-0023	    	 Water heater (in bad shape)
	  	Flat roof
	 24
	    	O-0024	    	 Generator (in bad shape)
	  	Flat roof

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