Xstrata Copper Letterhead]

June 04^th, 2007

Northgate Minerals Corporation
Kemess Mines Division
P.O. Box 3519
▇▇▇▇▇▇▇▇, ▇▇
V0J 2N0
Canada.-

Attention: ▇▇. ▇▇▇ ▇▇▇▇▇▇▇

The Agreement shall be subject to the terms and conditions hereinafter set forth and to Buyer's Standard Purchase Terms, a copy of which is attached to and forms part of the Agreement.

Seller shall deliver and Buyer shall accept and treat the concentrate in accordance with this Agreement and Buyer’s Standard Purchase Terms. In the event of any conflict between this Agreement and Buyer's Standard Purchase Terms, this Agreement shall govern.

Typically of the following approximate analysis:

Seller will arrange and pay for insurance coverage for 110% of the value of the concentrate shipped hereunder, by an internationally reputable insurance company or companies, acceptable to Buyer. Such insurance shall cover the shipment until the concentrate is unloaded at the receiving smelter. All benefits from such insurance coverage shall accrue to the party who holds title to the concentrate at the time of loss.

At its earliest ability, Seller shall send by facsimile to Buyer, Attention: ▇▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇ (Fax ▇▇▇-▇▇▇-▇▇▇▇) a Material Safety Data Sheet ("MSDS"), as required to comply with Workplace Hazardous Material Information System, (WHMIS) regulations and shall complete and sign the enclosed NAFTA Certificate of Origin.

(Copper Concentrate)

1. TERMINOLOGY: Where used in this agreement, unless the context otherwise requires:

"Agreement" means the letter attached hereto together with these Standard Spot Purchase Terms;

"letter" means the letter agreement between Falconbridge and the Seller to which these standard treatment terms are attached and in which they are incorporated;

"Metals Week" shall mean the publication known as "▇▇▇▇▇’▇ Metals Week" published weekly in New York, N.Y., by ▇▇▇▇▇▇-▇▇▇▇, Inc.;

"Falconbridge" means Xstrata Copper Canada, a business unit of Falconbridge Limited;

"Seller" means the party with which ▇▇▇▇▇▇▇▇▇▇▇▇ has entered into the agreement;

"concentrate" means the copper concentrate which is the subject of the agreement;

"smelter(s)" means one or more of the smelters owned and operated by Falconbridge or an affiliated corporation and at which the concentrate is to be treated as identified in the letter, being the ▇▇▇▇▇ smelter at Rouyn-Noranda, Quebec, the Altonorte smelter in Chile and/or the ▇▇▇▇ Creek smelter at Timmins, Ontario as the case may be;

"CCR Refinery" means the metal refinery operated by the CCR Division of Falconbridge at Montreal East, Quebec;

"month" means a calendar month;

"unit" means 1% of a ton of concentrate (e.g. one unit of copper means 20 pounds of copper per ton of concentrate);

"ton" and "sdt" means a ton of 2,000 pounds dry weight unless otherwise specified in the letter;

"dry metric ton" and "dmt" mean a tonne of 2,204.62 pounds dry weight;

"wet metric ton" and "wmt" mean a tonne of 2,204.62 pounds wet weight;

"wet ton" and "swt" means a ton of 2,000 pounds wet weight unless otherwise specified in the letter;

"gram" or "gm" means a gram of 0.032151 ▇▇▇▇ ounces;

"g/dmt" means grams per dry metric ton;

"ounce" or "oz" means a ▇▇▇▇ ounce of 31.1035 grams;

"opt" means ounces per ton; and

"pound" or "lb." means 16 ounces avoir dupois.

(i)     the concentrate shall be free of radioactivity, being the lesser of 300 cps (counts per second) or those levels prescribed from time to time by applicable domestic laws and regulations;

(ii)    the concentrate shall be free of polychlorinated biphenyls, being the lesser of 3 ppm (parts per million) or those levels prescribed from time to time by applicable domestic laws and regulations;

(iii)   the concentrate contain less than 200 parts per million beryllium;

(iv)   the concentrate shall be free of any other elements that may be deleterious to Falconbridge’s smelting or refining process, its employees or the environment, according to domestic laws and regulations.

4. QUALITY VARIANCE: It is a condition precedent to ▇▇▇▇▇▇▇▇▇▇▇▇’s obligation to purchase the concentrate hereunder that the concentrate conform to the quality analysis set out in the agreement and otherwise be free of impurities or substances deleterious to the smelting or refining process as identified in the agreement or as set out in paragraph 3 of these Standard Purchase Terms. Seller shall, in writing, notify Falconbridge in advance of shipment of any actual or anticipated change in the analysis of the concentrate. Falconbridge may, by written notice to the Seller at any time up to sixty days after sampling at smelter(s), refuse to accept delivery of any concentrate which does not reasonably conform to the quality analysis range specified in the letter or which in Falconbridge's reasonable opinion is unsuitable or undesirable for handling or treatment for any reason, including metallurgical, environmental or safety reasons.

5. REFUSAL OF DELIVERY: Falconbridge shall promptly notify Seller of any refusal by ▇▇▇▇▇▇▇▇▇▇▇▇ to accept delivery of concentrate as contemplated by paragraphs 4 or 10 and the parties shall negotiate in good faith to agree on what is to be done with such concentrate. If Falconbridge and the Seller have not so agreed within 30 days following the date of such notice, Falconbridge may take such reasonable action with respect to such concentrate as it considers appropriate in the circumstances, including without limitation, returning, stockpiling or otherwise removing such concentrate, accepting delivery but adjusting the purchase price of such concentrate on such basis as Falconbridge, acting reasonably, may determine in view of the quality of the concentrate, and/or suspending further deliveries of concentrate by the Seller. Any losses, charges, expenses or liability incurred by Falconbridge with respect to such concentrate, including without limitation, any handling, stockpiling, transportation, treatment or other charges and any losses of concentrate shall be for Seller's account.

6. DELIVERY, TITLE AND RISK: Subject to ▇▇▇▇▇▇▇▇▇▇▇▇'s right to refuse to accept delivery of concentrate as contemplated by paragraphs 4, 5 or 10, concentrate shall, for purposes of this agreement, be considered to be delivered and title to concentrate sold hereunder shall pass to Falconbridge upon completion of weighing and sampling at the receiving smelter, and said concentrate shall be free and clear of any lien, claim or encumbrance. Delivery shall be made as mutually agreed, unless otherwise specified in the agreement. Notwithstanding such delivery and passage of title, however, ▇▇▇▇▇▇ agrees that risk of loss or damage to the concentrate shall remain with the Seller, and the Seller agrees to maintain, at its own expense, insurance coverage for the full value of the concentrate to cover any loss or damage thereto until completion of weighing and sampling of the concentrate at the receiving smelter.

8. ANALYSIS: Each prepared sample shall be divided into four portions for analysis: one for Falconbridge, one for the Seller, one for the umpire and one to be held by Falconbridge in reserve. Falconbridge and Seller shall each analyze its sample portion for copper, silver, gold and penalty elements using standard commercial methods (being to uncorrected fire assay standards for silver and gold) and exchange its analyses with the other by cross mailing or other mutually acceptable procedure. If ▇▇▇▇▇▇▇▇▇▇▇▇'s and Seller's analyses are both within the splitting limits for any of the metals the average shall be used for settlement with respect to those metals. If ▇▇▇▇▇▇▇▇▇▇▇▇'s and Seller's analyses are not within the splitting limits for any of the metals, the umpire sample portion for such metals shall be sent for analysis to an umpire taken in rotation from the panel of umpires set out in the letter and the middle of the three analyses shall be used for settlement with respect to those metals. The cost of the umpire's analysis shall be borne by the party whose analysis is farther therefrom.

9. ACCOUNTABLE METALS: The purchase price of the concentrate to be paid by Falconbridge to the Seller shall be based on the metal content of the concentrate as determined under paragraphs 7 and 8, and calculated and paid as set out in the Agreement. In the event that any law, agency, publication or metal exchange whose quotations are the basis for pricing any metal hereunder terminates business operations, ceases publication or terminates the makeup of quotations, then Falconbridge shall pay the Seller in accordance with revised industry practice, having regard to such ascertainable market references as shall be available.

Any provisional payment made to either Seller or Falconbridge shall be made using the most recent monthly average price for all accountable metals, unless otherwise agreed to in writing by both parties.

10. ENVIRONMENTAL REGULATION: In the event any part of the treatment of concentrate becomes subject to any additional environmental regulation by any federal, provincial, or municipal legislative or other authority (whether by law, regulation, order, rule, policy, by-law or otherwise) which would result in an increase in the cost to Falconbridge of treating the concentrate, Falconbridge may give notice to Seller setting forth particulars of the regulation and the composition and determination of the estimated cost of compliance therewith. Falconbridge may by such notice request that representatives of the parties meet within 30 days of the date of such notice to renegotiate the terms and conditions of this agreement to provide for a reasonable basis for sharing such additional cost and such notice shall suspend this Agreement with respect to any concentrate which has not, at the time of such notice, been delivered by the Seller to Falconbridge. If agreement on new terms and conditions is not reached within 90 days from the date of such notice, Falconbridge by notice to the Seller at any time thereafter may terminate this Agreement and/or elect to refuse delivery of any concentrate on hand or in transit and any concentrate so refused shall be dealt with in accordance with paragraph 5.

11. CERTIFICATE OF ORIGIN: The Seller shall provide Falconbridge with a Certificate of Origin respecting the concentrate, (or said material) prior to delivery, and thereafter, as requested by ▇▇▇▇▇▇▇▇▇▇▇▇. Seller represents and warrants to Falconbridge that the information contained therein is complete and accurate, and that Falconbridge can rely on the information contained therein. The Seller agrees to indemnify and hold Falconbridge forever harmless against any liability, damage or expense, (including costs and legal fees), by reason, or arising out of or relating to any incorrect statement contained in the Certificate of Origin, including any additional duties and costs incurred by ▇▇▇▇▇▇▇▇▇▇▇▇ as a result of such incorrect statement. In the event that the Seller becomes aware of :

(ii) any investigation by any representative of any government agency that may effect veracity of the Certificate of Origin, the Seller shall forthwith be under an obligation to immediately so notify and provide details to Falconbridge, and in the case of any investigation, the Seller shall be under an obligation to fully co-operate with investigators to ensure that the investigation is promptly completed.

12. FORCE MAJEURE: Except for any obligations to make payment when due hereunder, the obligations of a Party shall be suspended to the extent and for the period that performance is prevented by any cause, whether foreseeable or unforeseeable, beyond its reasonable control, including, without limitation, labour disputes (however arising and whether or not employee demands are reasonable or within the power of the Party to grant); acts of God, laws, regulations, orders, proclamations, instructions or requests of any government or governmental entity; judgments or orders of any court having jurisdiction over either mine or smelter or refinery; inability to obtain on reasonably acceptable terms any public or private license, permit or other authorization; curtailment or suspension of activities to remedy or avoid an actual or alleged, present or prospective violation of federal, provincial or local environmental standards; acts of war or conditions arising out of or attributable to war, whether declared or not; riot, civil strife, insurrection or rebellion; fire, explosion, earthquake, storm, flood, sink holes, drought or other adverse weather conditions; delay or failure by suppliers or transporters of materials, parts, supplies, services or equipment or by contractors’ or subcontractors’ shortage of, or inability to obtain labour, transportation, materials, machinery, equipment, supplies, utilities or services; accidents; breakdown of equipment, machinery or facilities; or any other cause similar to the foregoing (collectively, a "Force Majeure Event").

The Party claiming Force Majeure (the "affected Party") shall promptly give written notice to the other Party of the Force Majeure Event stating therein the nature of the suspension, the reasons therefore, and the expected duration thereof. The affected Party shall be excused from performance of its obligations under this agreement to the extent made necessary by such Force Majeure Event and such obligations shall be suspended during the continuance of such Force Majeure Event, and such party shall incur no liability by reason of its failure to perform the obligations so excused. The affected Party shall endeavor with due diligence to resume compliance with its obligations hereunder at the earliest date and the parties will do all they reasonably can to overcome or mitigate the effects of any such event upon the mutual duties and obligations set out in this agreement.

During any period that the affected Party is excused from accepting or delivering concentrate by reason of the Force Majeure Event, Seller may sell to others or Falconbridge may procure from others that portion of concentrate which ▇▇▇▇▇▇▇▇▇▇▇▇ is excused from accepting or Seller is excused from delivering without liability to the other party.

If a Force Majeure Event results in a partial reduction of Seller’s ability to produce or deliver concentrate, Seller shall be obligated to allocate any such reduced amount of concentrate between Falconbridge and all other buyers of concentrate in proportion to Seller’s annual commitment to Falconbridge and such other buyers.

The affected Party shall use all reasonable diligence to remedy the Force Majeure Event as quickly as practicable. However, this requirement of reasonable diligence shall not require the settlement of strikes, lockouts or other labour difficulties by the Party involved therein on terms not acceptable to it. The manner of dealing with any such labour difficulties shall be entirely within the discretion of the Party so involved.

Should any Force Majeure Event continue for a period of greater than three (3) consecutive months of the date of written notice thereof, the Party to whom such written notice was given may, without liability to the other party, elect to (i) cancel the quantity of concentrate so affected, in which case both Parties shall be free from liability in respect of the undelivered portion of the concentrate, or (ii) extend the Agreement to cover the delivery of the affected quantity.

▇▇▇▇▇▇▇▇▇▇▇▇’s ability to divert concentrate to another Falconbridge group operation does not impair ▇▇▇▇▇▇▇▇▇▇▇▇’s right to declare Force Majeure.

14. WARRANTY: Seller represents and warrants that the concentrates provided herein shall conform to all specifications, samples or descriptions furnished to Falconbridge and that the concentrate shall be merchantable, free from defect and fit for any use that may be reasonably intended, such representation and warranty to be considered a condition relied upon by Falconbridge.

15. INSOLVENCY: Falconbridge reserves the right to immediately cancel or suspend this agreement (while preserving its other remedies arising at law or in equity) without liability to Seller in the event the Seller becomes or is adjudicated bankrupt or commits any act of bankruptcy, makes a general assignment for the benefit of creditors, is ordered wound up by a court of competent jurisdiction, permits or suffers a receiver to be appointed for all or any part of its property, takes advantage of any law for the benefit of insolvent persons, permits or suffers any writ of attachment, garnishment or execution to be filed or levied against it, ceases to carry on business or otherwise acknowledges its insolvency.

16. CANCELLATION FOR BREACH: Falconbridge reserves the right to cancel or suspend any or all of this agreement, (while preserving its other rights and remedies arising at law or in equity), without liability to Seller in the event Seller repudiates or breaches any of the terms and conditions of this agreement, to which ▇▇▇▇▇▇▇▇▇▇▇▇ gives notice, and such breach has continued unremedied for a period of twenty (20) days on the giving of notice of such breach.

17. RIGHT OF SET-OFF: Any monies payable by Falconbridge to Seller for goods or services furnished hereunder, may at the option of Falconbridge, be applied by ▇▇▇▇▇▇▇▇▇▇▇▇ as a set-off or deduction against the payment of any sums owed by Seller to Falconbridge or any affiliated company of Falconbridge.

18. WAIVER: Waiver by a party of a breach of any provision of this agreement shall not be deemed to be a waiver of future compliance with such provision. No delay or failure of a party to enforce any right or claim which it may have hereunder shall in any way affect, limit or waive such right or claim or the right of a party to compel strict compliance with each and every term and condition hereof.

19. SEVERABILITY: If any provision of this agreement is determined to be invalid or unenforceable in whole or in part, such invalidity or unenforceability shall attach only to such provision and all other provisions hereof shall continue in full force and effect.

20. CONFIDENTIAL INFORMATION: Each party agrees that it shall not disclose any of the terms and conditions of this agreement to any other party except as may be required to comply with any applicable law, court order, or regulatory authority having jurisdiction, or the disclosures consented to by the non-disclosing party. Where disclosure is required by law, court order or regulatory authority having jurisdiction, a copy of the information required to be disclosed shall be provided to the non-disclosing party in advance of its disclosure.

21. NOTICES: Any notice, demand, declaration, election or other communication ("Communication") to be given pursuant to or concerning this Agreement shall be in writing and shall be given by personal delivery or by facsimile transmission addressed, in the case of Falconbridge, to Falconbridge Limited, Queen’s Quay Terminal, ▇▇▇ ▇▇▇▇▇’▇ ▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇▇▇, ▇▇▇▇▇▇▇, ▇▇ ▇▇▇ ▇▇▇, Attention: Vice President, Copper Raw Materials and, in the case of the Seller, to the address specified in the letter or to such other address, facsimile number or individual as may be designated by notice given by either party to the other. Any Communication given by personal delivery shall be conclusively deemed to have been given on the day of actual delivery thereof and, if given by facsimile, on the day of transmittal thereof.