**Exhibit31.2**

CERTIFICATION PURSUANT TO

Section 302 of the Sarbanes-Oxley Act of 2002
| I, Jose N. Chirinos, Comptroller and Chief  Financial Officer of Southern Copper Corporation, certify that: |
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| 1.                                                                                                          | I have reviewed this quarterly report on Form 10-Q  of Southern Copper Corporation; |
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| 2.                                                                                                          | Based on my knowledge, this quarterly report does  not contain any untrue statement of a material fact or omit to state a  material fact necessary to make the statements made, in light of the  circumstances under which such statements were made, not misleading with  respect to the period covered by this quarterly report; |
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| 3.                                                                                                          | Based on my knowledge, the condensed consolidated  financial statements, and other financial information included in this  quarterly report, fairly present in all material respects the financial  condition, results of operations and cash flows of the registrant as of, and  for, the periods presented in this quarterly report; |
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| 4.                                                                                                          | The registrant’s other certifying officer(s) and I  are responsible for establishing and maintaining disclosure controls and  procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and  internal control over financial reporting (as defined in Exchange Act Rules  13a-15(f) and 15-d-15(f) for the registrant and we have: |
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|                                                                                                        | a. | Designed such disclosure controls and procedures, or  caused such disclosure controls and procedures to be designed under our  supervision, to ensure that material information relating to the registrant,  including its consolidated subsidiaries, is made known to us by others within  those entities, particularly during the period in which this quarterly report  is being prepared; |
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|                                                                                                        | b. | Designed such internal control over financial  reporting, or caused such internal control over financial reporting to be  designed under our supervision, to provide reasonable assurance regarding the  reliability of financial reporting and the preparation of condensed  consolidated financial statements for external purposes in accordance with  generally accepted accounting principles; |
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|                                                                                                        | c. | Evaluated the effectiveness of the registrant’s  disclosure controls and procedures and presented in this project our  conclusions about the effectiveness of the disclosure controls and procedures  as of the end of the period covered by this report based on such evaluation;  and |
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|                                                                                                        | d. | Disclosed in this report any change of the  registrant’s internal control over financial reporting that occurred during  the registrant’s most recent fiscal quarter that has materially affected, or  is reasonably likely to materially affect, the registrant’s internal control  over financial reporting; and |
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| 5.                                                                                                          | The registrant’s other certifying officer(s) and I  have disclosed, based on our most recent evaluation of internal control over  financial reporting, to the registrant’s auditors and the audit committee of  the registrant’s board of directors (or persons performing the equivalent  functions): |
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|        | a.     | All significant deficiencies and material weaknesses  on the design or operation of internal control over financial reporting which  are reasonably likely to adversely affect the registrant’s ability to record,  process, summarize and report financial information; and |
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|   | b.     | Any fraud, whether or not material, that involves  management or other employees who have a significant role in the registrant’s  internal control over financial reporting.                                                                                                 |

 

 
|                | /s/ Jose N. Chirinos                     |
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|           | Jose N. Chirinos                         |
|           | Comptroller and  Chief Financial Officer |
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| August 3, 2007 |                                     |

 

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