Mcewen Mining Inc – Amendment Number 3 to Option and Joint Venture Agreement (March 1st, 2017)

THIS AMENDMENT NUMBER 3 to the Option and Joint Venture Agreement is made as of the 10th day of September, 2004, by and between MINERA ANDES INC., a corporation formed under the laws of Alberta, Canada ("MAI"), MINERA ANDES S.A., a corporation formed under the laws of Argentina ("MASA"), MAURICIO HOCHSCHILD & CIA. LTDA., a corporation formed under the laws of Peru ("MHC") and LORENZON LIMITED ("Lorenzon"), a corporation formed under the laws of the Cayman Islands;

Mcewen Mining Inc – Amendment Number 4 to Option and Joint Venture Agreement (March 1st, 2017)

THIS AMENDMENT NUMBER 4 to the Option and Joint Venture Agreement is made as of the 17th day of September, 2010, by and among MINERA ANDES INC., a corporation formed under the laws of Alberta, Canada ("MAI"), MINERA ANDES S.A., a corporation formed under the laws of Argentina ("MASA"), HOCHSCHILD MINING HOLDINGS LIMITED, a corporation organized under the laws of the United Kingdom ("HM Holdings"), as assignee of MAURICIO HOCHSCHILD & CIA. LTDA., a corporation formed under the laws of Peru ("MHC"), and HOCHSCHILD MINING (ARGENTINA) CORPORATION S.A. ("HM Argentina"), a corporation existing under the laws of Argentina;

Mcewen Mining Inc – Option and Joint Venture Agreement (March 1st, 2017)

THIS AGREEMENT is made as of the 15th day of March, 2001, by and between MINERA ANDES INC., a corporation formed under the laws of Canada ("MAI"), MINERA ANDES S.A., a corporation formed under the laws of Argentina ("MASA") and MAURICIO HOCHSCHILD & CIA. LTDA., a corporation formed under the laws of Peru ("MHC").

AMERICAN CORDILLERA MINING Corp – To Option and Joint Venture Agreement (April 8th, 2015)

Alberta Star Development Corp – Option and Joint Venture Agreement (March 31st, 2014)

TERRAX MINERALS INC., a corporation existing under the laws of British Columbia and having its head office at 2300 - 1066 West Hastings Street, Vancouver British Columbia, V6E 3X2 Fax: 604-648-8665

AMERICAN CORDILLERA MINING Corp – American Cordillera Mining Corporation Announces the Execution of an Option and Joint Venture Agreement With Kent Exploration, Inc. On the Bayhorse Silver Mine (December 10th, 2013)

AMERICAN CORDILLERA MINING Corp – American Cordillera Mining Corporation Announces the Execution of an Option and Joint Venture Agreement With Archean Star Resources, Inc. (February 13th, 2013)

AMERICAN CORDILLERA MINING Corp – Option and Joint Venture Agreement (February 13th, 2013)

ARCHEAN STAR RESOURCES INC., a corporation existing under the laws of British Columbia and having its registered office at 410 744 West Hastings Street, Vancouver, British Columbia, V6C 1A5

AMERICAN CORDILLERA MINING Corp – American Cordillera Mining Corporation Announces the Execution of an Option and Joint Venture Agreement With Archean Star Resources, Inc. (February 11th, 2013)

AMERICAN CORDILLERA MINING Corp – Option and Joint Venture Agreement (February 11th, 2013)

ARCHEAN STAR RESOURCES INC., a corporation existing under the laws of British Columbia and having its registered office at 410 744 West Hastings Street, Vancouver, British Columbia, V6C 1A5

Goldsands Development Co – Mineral Right Option and Joint Venture Agreement (January 25th, 2012)

THIS BINDING AGREEMENT (hereinafter the "Agreement") made effective as of the 20th day of January, 2012 (hereinafter the "Effective Date") is executed by and between:

Lake Victoria Mining Company, Inc. – Option and Joint Venture Agreement (May 12th, 2011)

LAKE VICTORIA MINING COMPANY, INC., a company incorporated pursuant to the laws of State of Nevada and having its principal executive office at suite 810 675 West Hastings Street, Vancouver, British Columbia V6B 1N2

Lake Victoria Mining Company, Inc. – Option and Joint Venture Agreement (May 12th, 2011)

LAKE VICTORIA MINING COMPANY, INC., a company incorporated pursuant to the laws of State of Nevada and having its principal executive office at suite 810 675 West Hastings Street, Vancouver, British Columbia V6B 1N2

Lake Victoria Mining Company, Inc. – Option and Joint Venture Agreement (May 12th, 2011)

LAKE VICTORIA MINING COMPANY, INC., a company incorporated pursuant to the laws of State of Nevada and having its principal executive office at suite 810 675 West Hastings Street, Vancouver, British Columbia V6B 1N2

Lake Victoria Mining Company, Inc. – Option and Joint Venture Agreement (May 12th, 2011)

LAKE VICTORIA MINING COMPANY, INC., a company incorporated pursuant to the laws of State of Nevada and having its principal executive office at suite 810 675 West Hastings Street, Vancouver, British Columbia V6B 1N2

Infrastructure Materials Corp. – NIVLOC PROPERTY OPTION and JOINT VENTURE AGREEMENT (March 1st, 2011)

Mill City Gold Corp. – Letter Agreement Dated September 2, 2008 (The "Agreement") Among the Company, Temex Resources Corp. And Rainy Mountain Royalty Corp. (Formerly East West Resource Corporation) in Connection With an Option and Joint Venture Agreement Relating to the GP2 Property (February 28th, 2011)

Mill City Gold Corp. – Option and Joint Venture Agreement Target 12 (Rosebud) Property (January 14th, 2011)

North Bay Resources Inc – Second Amendment to Section 3 - Option of the Fawn & Buck Option and Joint Venture Agreement Made as of October 15, 2009 (The "Option Agreement") Dear Mr. Leopold: (September 17th, 2010)

Further to your exchange of emails with Mr. Turner concerning an amendment to the Option Agreement in respect of the dates by which exploration Expenditures have to be incurred, this letter is to document the parties' agreement that Section 3.2 of the Option Agreement will be further amended to read as follows:

North Bay Resources Inc – Fawn & Buck Option and Joint Venture Agreement (February 11th, 2010)

Clifton Star Resources Inc. – DUPARQUET MINING CAMP PROJECT OPTION AND JOINT VENTURE AGREEMENT Between CLIFTON STAR RESOURCES INC. And OSISKO MINING CORPORATION Executed on December [8], 2009 With Effect as of January 1st, 2010 (December 29th, 2009)

Crosshair Expl & Mining Corp – GOLDEN PROMISE OPTION AND JOINT VENTURE AGREEMENT BETWEEN CROSSHAIR EXPLORATION & MINING CORP. AND PARAGON MINERALS CORPORATION DATED AS OF APRIL April 8, 2009 (June 26th, 2009)

or activity undertaken by the Participants wherever vested except in respect of the Properties and the Area of Common Interest; and

Uranium Energy – Mineral Property Option and Joint Venture Agreement (June 9th, 2009)

THIS MINERAL PROPERTY OPTION AND JOINT VENTURE AGREEMENT is made and dated for reference effective as of the 8th day of June, 2009 as fully executed on this 8th day of June, 2009 (the "Execution Date").

Journey Resources Corp. – Amendment to Option and Joint Venture Agreement (July 7th, 2008)

GRENVILLE GOLD CORPORATION, a corporation existing under the laws of the Province of Ontario and having a head office at Suite 207 475 Howe Street, Vancouver, B.C. V6C 2B3

Journey Resources Corp. – Option and Joint Venture Agreement (July 7th, 2008)

GRENVILLE GOLD CORPORATION, a corporation existing under the laws of the Province of Ontario and having a head office at Suite 207 475 Howe Street, Vancouver, B.C. V6C 2B3

LKA Gold Inc – Option and Joint Venture Agreement -- Golden Wonder Project, Colorado (November 9th, 2007)

This Letter Agreement , as well as the execution of a formal and more detailed option and joint venture agreement (the "OJV Agreement") and the completion of all other transactions contemplated herein, are hereinafter collectively referred to as the "Transaction". The Offer is made and the Transaction shall be completed, in accordance with the provisions and subject to the terms and conditions set forth in this Letter Agreement. Richmont and LKA are sometimes hereinafter collectively referred to as the "Parties" and, individually, a "Party".

Tresoro Mining Corp. – Nu-Mex Uranium Corp. & Strathmore Resources (Us) Ltd. Dalton Pass Property - Option and Joint Venture Agreement I N D E X (October 12th, 2007)

IN CONSIDERATION OF the mutual covenants and agreements herein contained and the sum of Ten Dollars ($10.00) paid by the Optionee to the Optionor (the receipt of which is hereby acknowledged), the Parties hereto agree as follows:

Tresoro Mining Corp. – Nu-Mex Uranium Corp. & Strathmore Resources (Us) Ltd. Nose Rock Property - Option and Joint Venture Agreement I N D E X (September 14th, 2007)

IN CONSIDERATION OF the mutual covenants and agreements herein contained and the sum of Ten Dollars ($10.00) paid by the Optionee to the Optionor (the receipt of which is hereby acknowledged), the Parties hereto agree as follows:

Strathmore Minerals Corp. – Yellowcake Mining Inc. & Strathmore Resources (Us) Ltd. Jeep Project - Option and Joint Venture Agreement I N D E X (August 28th, 2007)

The Optionor is the owner of an undivided 100% interest in the mineral resources collectively known as the Jeep Project, situated in Fremont County, Wyoming, as more particularly described in Appendix I;

Strathmore Minerals Corp. – Yellowcake Mining Inc. & Strathmore Resources (Us) Ltd. Sky Project - Option and Joint Venture Agreement I N D E X (August 28th, 2007)

The Optionor is the owner of an undivided 100% interest in the mineral resources collectively known as the Sky Project, situated in Fremont County, Wyoming, as more particularly described in Appendix I;

First Colombia Gold Corp. – Mineral Property Option and Joint Venture Agreement (June 13th, 2007)

FINMETAL MINING LTD., a Nevada corporation having an address for notice and delivery located at Suite 500, 666 Burrard Street, Vancouver, British Columbia, Canada, V6C 2X8

Sky Digital Stores Corp. – Yellowcake Mining Inc. & Strathmore Minerals Corp. Juniper Ridge Project - Option and Joint Venture Agreement I N D E X (March 16th, 2007)

U.S. Energy Corp. – Subject: Amended and Restated Option and Joint Venture Agreement - Sahara Mine Property, (May 12th, 2006)

of the mining facilities (for the purposes hereof a major improvement, expansion, modernization or replacement of the mining facilities is one which involves an aggregate cost in any one year of more than $l,000,000.00);

Subject: Amended and Restated Option and Joint Venture Agreement - Sahara Mine Property, (May 12th, 2006)

of the mining facilities (for the purposes hereof a major improvement, expansion, modernization or replacement of the mining facilities is one which involves an aggregate cost in any one year of more than $l,000,000.00);

Uranerz Energy Corporation – Cochrane River Option and Joint Venture Agreement (November 21st, 2005)

URANERZ ENERGY CORPORATION, a corporation existing under the laws of the State of Nevada and having its head office at Suite 1410, 800 West Pender Street, Vancouver, B.C., V6C 2V6