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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following
Registration Statements:

|(1) | Registration Statement (Form S-8 No. 333-157887)
      pertaining to Augusta Resource Corporations Stock Option Plan, adopted
      May 3, 2004, as amended and restated on June 1, 2007,                                                                                                                                                                                                  
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|(2) | Registration Statement (Form S-8 No. 333-163161)
      pertaining to Augusta Resource Corporations Stock Option Plan, adopted
      May 3, 2004, as amended and restated as of June 11, 2009 and the
      Restricted Share Unit and Restricted Share Plan for designated
      participants of Augusta Resource Corporation and its affiliates, adopted
      effective June 11, 2009, and
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|(3) | Registration Statement (Form S-8 No. 333-173297)
      pertaining to Augusta Resource Corporations Stock Option Plan, amended
      and restated as of June 11, 2009 and the Restricted Share Unit and
      Restricted Share Plan for designated participants of Augusta Resource
      Corporation and its affiliates, adopted effective June 11,
  2009                                 

of our reports dated March 19, 2012, with respect to the
consolidated financial statements of Augusta Resource Corporation and the
effectiveness of internal control over financial reporting of Augusta Resource
Corporation included in this Annual Report (Form 40-F) of Augusta Resource
Corporation for the year ended December 31, 2011.

We also consent to the use of our reports dated March 19, 2012
with respect to the consolidated financial statements of Augusta Resource
Corporation and the effectiveness of internal control over financial reporting
of Augusta Resource Corporation included in the Annual Report (Form 40-F) for
the year ended December 31, 2011, filed with the Securities and Exchange
Commission.

/s/ Ernst & Young LLP
  Chartered Accountants 
  Vancouver, Canada March 19, 2012

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