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                                                                    EXHIBIT 4.15

                               SECURITY AGREEMENT

     THIS SECURITY AGREEMENT ("Agreement") is made and entered into the 21st day
of June 2005, by and between Nord Resources Corporation, a Delaware corporation
("Debtor") and Ronald A. Hirsch and Stephen Seymour (collectively, the "Secured
Party").

     For valuable consideration, receipt of which is acknowledged, the parties
agree as follows:

1. Grant of Security Interest. Debtor hereby grants to Secured Party a second
priority security interest in the property described in Paragraph 2 below
(collectively and severally, the "Collateral") to secure the payment and
performance of the obligations of Debtor to Secured Party described in Paragraph
3 below (collectively and severally, the "Obligations").

2. Collateral. "Collateral" means the collateral in which the Secured Party is
granted a security interest by this Agreement and which shall include the
following, whether presently owned or existing or hereafter acquired or coming
into existence, and all additions and accessions thereto and all substitutions
and replacements thereof, and all proceeds, products and accounts thereof,
including, without limitation, all proceeds from the sale or transfer of the
Collateral and of insurance covering the same and of any tort claims in
connection therewith:

               (i) All Goods of the Debtor, including, without limitations, all
          machinery, equipment, computers, motor vehicles, trucks, tanks, boats,
          ships, appliances, furniture, special and general tools, fixtures,
          test and quality control devices and other equipment of every kind and
          nature and wherever situated, together with all documents of title and
          documents representing the same, all additions and accessions thereto,
          replacements therefor, all parts therefor, and all substitutes for any
          of the foregoing and all other items used and useful in connection
          with the Debtor's businesses and all improvements thereto
          (collectively, the "Equipment"); and

               (ii) All Inventory of the Debtor; and

               (iii) All of the Debtor's contract rights and general
          intangibles, including, without limitation, all partnership interests,
          stock or other securities, licenses, distribution and other
          agreements, computer software development rights, leases, franchises,
          customer lists, quality control procedures, grants and rights,
          goodwill, trademarks, service marks, trade styles, trade names,
          patents, patent applications, copyrights, deposit accounts, and income
          tax refunds (collectively, the "General Intangibles"); and

               (iv) All Receivables of the Debtor including all insurance
          proceeds, and rights to refunds or indemnification whatsoever owing,
          together with all instruments, all documents of title representing any
          of the foregoing, all rights in any merchandising, goods, equipment,
          motor vehicles and trucks which any of the same may represent, and all
          right, title, security and guaranties with respect to each Receivable,
          including any right of stoppage in transit; and

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               (v) All of the Debtor's documents, instruments and chattel paper,
          files, records, books of account, business papers, computer programs
          and the products and proceeds of all of the foregoing Collateral set
          forth in clauses (i)-(iv) above.

Terms used in this Section 2 but not otherwise defined in this Agreement that
are defined in Division 9 of the California Commercial Code (the "Code") shall
have the respective meanings given such terms in Division 9 of the Code.

3. Obligations. The Obligations of Debtor secured by this Agreement consist of:

     (a) The payment and performance of Debtor's indebtedness and obligations to
Secured Party under the Note and all interest accrued thereon as more fully set
forth in the Note; and

     (b) The payment and performance of all Debtor's indebtedness and
obligations to Secured Party under (i) the Revolving Line of Credit Agreement,
(ii) this Security Agreement, (iii) any and all agreements, instruments or
documents now or hereafter evidencing or securing the Note, and (iv) any and all
extensions, renewals, modifications, amendments and replacements thereof.

4. Representations and Covenants of Debtor. Debtor represents, warrants and
agrees as follows:

     (a) At the request of Secured Party, Debtor will join with Secured Party in
executing one or more Financing Statements, pursuant to the Uniform Commercial
Code, as well as a Deed of Trust on real property, in a form satisfactory to
Secured Party and will pay the cost of filing the same or filing or recording
the same in all public offices wherever filing or recording is deemed by Secured
Party to be necessary or desirable.

     (b) Debtor will do all acts which may be necessary to maintain, preserve
and protect the Collateral, not to commit or permit any waste thereof, to
maintain the Collateral in good order, repair and condition, reasonable wear and
tear excepted, and to comply with all laws, regulations and ordinances relating
to the possession, operation, maintenance and control of the Collateral.

     (c) Debtor will not remove any of the Collateral from its premises, except
for the purposes of repair or replacement with other articles of substantially
similar quality and value, and except for sales of products in the ordinary
course of business.

     (d) Debtor will not sell, assign, lease, encumber, or otherwise dispose of
all or any of the Collateral without the prior written consent of Secured Party.

     (e) Debtor will pay, at least ten days before delinquency, all taxes,
assessments and liens now or hereafter imposed on the Collateral.

     (f) Debtor will procure, execute and deliver from time to time any
agreements, endorsements, assignments, financing statements and other writings
and take such other actions deemed necessary or appropriate by Secured Party to
create, confirm, perfect, maintain and protect its security interest hereunder
and the priority thereof.

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5. Authorized Action by Secured Party. If Debtor fails to make any payment or do
any act as herein required, then Secured Party, without obligation to do so and
without notice to or demand upon Debtor, may make such payments and do such acts
as Secured Party may deem necessary to protect its security interest in the
Collateral. Debtor hereby agrees to repay immediately and without demand all
sums so expended by Secured Party pursuant to the provisions of this paragraph
with interest from date of expenditure at the maximum rate allowed by law.

6. Default. Debtor shall be in default under this Agreement upon the happening
of any of the following events or conditions:

     (a) Default by Debtor in the payment of any or all of the Obligations
secured hereby, or failure by Debtor to perform any agreement herein contained
or referred to herein or secured hereby, or the occurrence of any event of
default under any and all other related agreements.

     (b) Any warranty, representation or statement, made or furnished to Secured
Party by or on behalf of Debtor, that proves to have been false in any material
respect when made or furnished;

     (c) Substantial uninsured damage, destruction, or danger, in the opinion of
Secured Party, or misuse or confiscation of the Collateral or the making of any
levy, seizure or attachment thereof or therein; or,

     (d) Termination of existence, dissolution, insolvency, business failure,
appointment of a receiver of any part of the property of, assignment for the
benefit of creditors by, or the commencement of any proceedings under any
bankruptcy or insolvency laws by, or against, Debtor.

7. Rights upon Default. Upon any such default, Secured Party, at his option,
without demand upon or notice to Debtor, may declare all Obligations secured
hereby to be immediately due and payable, and Secured Party shall have all the
rights and remedies provided a secured party under the Uniform Commercial Code
as enacted in California. Additionally, upon learning of Debtor's default,
Secured Party may immediately regain possession and control of the collateral
and the business. All rights and remedies of Secured Party under this Agreement
are in addition to all rights and remedies given to Secured Party contained in
any other agreement, instrument or document or available to Secured Party at
law, by statute or in equity. All such rights and remedies are cumulative and
not exclusive and may be exercised successively, concurrently and repeatedly.

8. Waivers. Debtor waives any right to require Secured Party to (a) proceed
against any person, (b) proceed against, apply or exhaust any Collateral or any
other security for the Obligations secured hereby, or (c) pursue any other
remedy in Secured Party's power. Debtor waives any defenses arising by reason of
any disability or other defense of any person, or by reason of the cessation
from any cause whatsoever of the liability of any other person.

9. Miscellaneous.

     (a) This Agreement may be assigned by Secured Party only. Any assignment of
this Agreement by Debtor is null and void and shall constitute a default by
Debtor. This Agreement shall bind and inure to the benefit of the parties'
successors and assigns.

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     (b) References to the Uniform Commercial Code refer to the Uniform
Commercial Code as adopted by the State of California.

     (c) This Agreement and the rights of the parties hereunder shall be
governed by and construed in accordance with the laws of the State of California
including all matters of construction, validity, performance, and enforcement
and without giving effect to the principles of conflict of laws. The parties
submit to the jurisdiction of the Courts of the County of Orange, State of
California or a Federal Court empaneled in the State of California for the
resolution of all legal disputes arising under the terms of this Agreement,
including, but not limited to, enforcement of any arbitration award. In the
event any Party hereto shall commence legal proceedings against the other to
enforce the terms hereof, or to declare rights hereunder, as the result of a
breach of any covenant or condition of this Agreement, the prevailing party in
any such proceeding shall be entitled to recover from the losing party its costs
of suit, including reasonable attorneys' fees, as may be fixed by the court.

     (d) Upon performance of the obligation and payment of the debt secured
hereby, Secured Party shall execute such documents as Debtor may request to
release and relinquish the security interest created hereby.

     (e) This Agreement may be executed in counterparts, each of which shall be
deemed an original, but all of which together shall constitute one and the same
instrument.

     (f) Any forbearance, failure or delay by Secured Party in exercising any
right or remedy shall not preclude the further exercise thereof, and every right
or remedy of Secured Party shall continue in full force and effect until such
right or remedy is specifically waived in a writing executed by Secured Party.

     (g) This Agreement constitutes the entire agreement with respect to the
subject matter hereof. The terms and provisions of this Agreement may not be
amended, waived, altered or modified except by written agreement signed by
Debtor and Secured Party.

SIGNATURES ON NEXT PAGE

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     The parties hereto have executed this Agreement the day and year first
written above.

DEBTOR:

NORD RESOURCES CORPORATION,
A Delaware corporation

/s/ Erland A. Anderson
-------------------------------------
By: Erland A. Anderson
Its: President

SECURED PARTY:

/s/ Ronald A. Hirsch
-------------------------------------
Ronald A. Hirsch, an individual

/s/ Stephen Seymour
-------------------------------------
Stephen Seymour, an individual

                                        5<PAGE>
                                                                    EXHIBIT 4.16

                             SECURED PROMISSORY NOTE

$600,000.00                                                          Dragoon, AZ
                                                                   June 21, 2005

This Secured Promissory Note (the "Note") is made and executed as of the date
referred to above, by and between Nord Resources Corporation, a Delaware
corporation (the "Borrower"), and Ronald A. Hirsch and Stephen Seymour
(collectively, "Lender"). By this Note, the Borrower promises and agrees to pay
to the order of Lender the principal sum of Six Hundred Thousand Dollars
($600,000.00), or the aggregate unpaid principal amount of all advances made by
Lender to Borrower pursuant to the terms of a Revolving Line of Credit Agreement
(the "Loan Agreement ") and a Security Agreement (the "Security Agreement") of
even date herewith, whichever is less, together with interest thereon from the
date each advance is made until paid in full, both before and after judgment, at
the rate of six percent (6%) per annum, simple interest.

The entire unpaid principal balance, together with any accrued interest and
other unpaid charges or fees hereunder, shall be due and payable on December 31,
2005, (the "Maturity Date").

Prepayment in whole or part may occur at any time hereunder without penalty;
provided that the Lender shall be provided with not less than ten (10) days
notice of the Borrower's intent to pre-pay; and provided further that any such
partial prepayment shall not operate to postpone or suspend the obligation to
make, and shall not have the effect of altering the time for payment of the
remaining balance of the Note as provided for above, unless and until the entire
obligation is paid in full. All payments received hereunder shall be applied,
first, to any costs or expenses incurred by Lender in collecting such payment or
to any other unpaid charges or expenses due hereunder; second, to accrued
interest; and third, to principal.

An event of default will occur if any of the following events occurs: (a)
failure to pay any principal or interest hereunder within ten (10) days after
the same becomes due; (b) if any representation or warranty made by Borrower in
the Loan Agreement or in connection with any borrowing or request for an advance
thereunder, or in any certificate, financial statement, or other statement
furnished by Borrower to Lender is untrue in any material respect at the time
when made; (c) default by Borrower in the observance or performance of any other
covenant or agreement contained in the Loan Agreement or Security Agreement, (d)
filing by Borrower of a voluntary petition in bankruptcy seeking reorganization,
arrangement or readjustment of debts, or any other relief under the Bankruptcy
Code as amended or under any other insolvency act or law, state or federal, now
or hereafter existing; or (e) filing of an involuntary petition against Borrower
in bankruptcy seeking reorganization, arrangement or readjustment of debts, or
any other relief under the Bankruptcy Code as amended, or under any other
insolvency act or law, state or federal, now or hereafter existing, and the
continuance thereof for sixty (60) days undismissed, unbonded, or undischarged.

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Any notice or demand to be given to the parties hereunder shall be deemed to
have been given to and received by them and shall be effective when personally
delivered or when deposited in the U.S. mail, certified or registered mail,
return receipt requested, postage prepaid, and addressed to the party at his or
its last known address, or at such other address as the one of the parties may
hereafter designate in writing to the other party.

The Borrower hereof waives presentment for payment, protest, demand, notice of
protest, notice of dishonor, and notice of nonpayment, and expressly agrees that
this Note, or any payment hereunder, may be extended from time to time by the
Lender without in any way affecting its liability hereunder.

In the event any payment under this Note is not made at the time and in the
manner required, the Borrower agrees to pay any and all costs and expenses which
may be incurred by the Lender hereof in connection with the enforcement of any
of its rights under this Note or under any such other instrument, including
court costs and reasonable attorneys' fees.

This Note shall be governed by and construed and enforced in accordance with the
laws of California.

The Borrower:

NORD RESOURCES CORPORATION,
A Delaware corporation

/s/ Erland A. Anderson
-------------------------------------
By: Erland A. Anderson
Its: President

The Lender:

/s/ Ronald A. Hirsch
-------------------------------------
Ronald A. Hirsch, an individual

/s/ Stephen Seymour
-------------------------------------
Stephen Seymour, an individual

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