UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                   ----------

                                    FORM 8-K

                                   ----------


                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): February 24, 2006

                                   ----------

                            GRAN TIERRA ENERGY, INC.
                             (f/k/a GOLDSTRIKE INC.)

             (Exact name of registrant as specified in its charter)

                                   ----------



            Nevada                      333-111656              98-0479924
--------------------------------------------------------------------------------
 (State or other jurisdiction    (Commission File Number)    (I.R.S. Employer
       of incorporation)                                  Identification Number)

               300, 611 - 10th Avenue S.W.
                 Calgary, Alberta, Canada                             T2R 0B2
         (Address of principal executive offices)                    (Zip Code)

                                 (403) 265-3221
              (Registrant's telephone number, including area code)




Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

|_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

|_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))

                                   ----------
<PAGE>



Item 8.01.  Other Events.

      On February 28, 2006, Gran Tierra Energy Inc. (the "Company") announced an
agreement with Golden Oil Corporation  ("Golden Oil"),  entered into on February
24,  2006,  to acquire a 50%  interest in the El Vinalar  Block in the  Noroeste
Basin of  Argentina.  El  Vinalar  encompasses  1,005  gross  square  kilometers
(248,341  acres) and  contains a portfolio  of  exploration  leads and oil field
enhancement opportunities.

      The total  consideration  for the  acquisition is $0.95 million,  plus the
funding of up to $2.70 million in a planned drilling program.

      The  purchase  of Golden  Oil's  interest is expected to close on or about
April 30, 2006,  or such other date as shall be agreed in writing by the Company
and Golden  Oil.  The closing is subject to standard  conditions  including  the
execution of mutually  acceptable  agreements on or before the closing date, the
receipt of results of an environmental audit of the assets, and the provision of
necessary  financing.  If a joint venture agreement has not been signed by April
30, 2006 by both the Company and Golden Oil, the Company's acquisition agreement
will expire according to its terms.

      On February 28, 2006,  the Company  issued a press release to announce its
execution of the above  described  offer.  The press release is filed as Exhibit
99.1 to this Current Report on Form 8-K and is incorporated herein by reference.


Item 9.01. Financial Statements and Exhibits.

      (d) Exhibits.


          Exhibit No.     Description
          -----------     -----------
          99.1            Press Release of the Company dated February 28, 2006





                                       2

<PAGE>



                                   SIGNATURES

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                                  Gran Tierra Energy Inc.


                                                  By:   /s/ James Hart
                                                       -------------------------
                                                  Name: James Hart
                                                  Title: Chief Financial Officer

                                                  Date:  March 2, 2006

                                       3

<PAGE>




                                  EXHIBIT INDEX


Exhibit No.     Description
-----------     -----------
99.1            Press Release of the Company dated February 28, 2006
{"company-data": {"conformed-name": "GRAN TIERRA ENERGY, INC.", "cik": "0001273441", "assigned-sic": "1000", "irs-number": "000000000", "state-of-incorporation": "NV", "fiscal-year-end": "0831"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-111656", "film-number": "06659783"}, "business-address": {"street1": "10TH FLOOR", "street2": "610-8TH AVENUE S.W.", "city": "CALGARY", "state": "A0", "zip": "T2P1G5", "phone": "403-537-3218"}, "mail-address": {"street1": "10TH FLOOR", "street2": "610-8TH AVENUE S.W.", "city": "CALGARY", "state": "A0", "zip": "T2P1G5"}, "former-company": [{"former-conformed-name": "GOLDSTRIKE INC", "date-changed": "20040113"}, {"former-conformed-name": "GOLKSTRIKE INC", "date-changed": "20031216"}]}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   ----------

                                    FORM 8-K

                                   ----------

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): February 24, 2006

                                   ----------

                            GRAN TIERRA ENERGY, INC.
                             (f/k/a GOLDSTRIKE INC.)

             (Exact name of registrant as specified in its charter)

                                   ----------

            Nevada                      333-111656              98-0479924
--------------------------------------------------------------------------------
 (State or other jurisdiction    (Commission File Number)    (I.R.S. Employer
       of incorporation)                                  Identification Number)

               300, 611 - 10th Avenue S.W.
                 Calgary, Alberta, Canada                             T2R 0B2
         (Address of principal executive offices)                    (Zip Code)

                                 (403) 265-3221
              (Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

|_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

|_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))

                                   ----------
Item 8.01.  Other Events.

      On February 28, 2006, Gran Tierra Energy Inc. (the "Company") announced an
agreement with Golden Oil Corporation  ("Golden Oil"),  entered into on February
24,  2006,  to acquire a 50%  interest in the El Vinalar  Block in the  Noroeste
Basin of  Argentina.  El  Vinalar  encompasses  1,005  gross  square  kilometers
(248,341  acres) and  contains a portfolio  of  exploration  leads and oil field
enhancement opportunities.

      The total  consideration  for the  acquisition is $0.95 million,  plus the
funding of up to $2.70 million in a planned drilling program.

      The  purchase  of Golden  Oil's  interest is expected to close on or about
April 30, 2006,  or such other date as shall be agreed in writing by the Company
and Golden  Oil.  The closing is subject to standard  conditions  including  the
execution of mutually  acceptable  agreements on or before the closing date, the
receipt of results of an environmental audit of the assets, and the provision of
necessary  financing.  If a joint venture agreement has not been signed by April
30, 2006 by both the Company and Golden Oil, the Company's acquisition agreement
will expire according to its terms.

      On February 28, 2006,  the Company  issued a press release to announce its
execution of the above  described  offer.  The press release is filed as Exhibit
99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

      (d) Exhibits.

          Exhibit No.     Description
          -----------     -----------
          99.1            Press Release of the Company dated February 28, 2006

                                       2
SIGNATURES

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                                  Gran Tierra Energy Inc.

                                                  By:   /s/ James Hart
                                                       -------------------------
                                                  Name: James Hart
                                                  Title: Chief Financial Officer

                                                  Date:  March 2, 2006

                                       3
EXHIBIT INDEX

Exhibit No.     Description
-----------     -----------
99.1            Press Release of the Company dated February 28, 2006