Mainstream Minerals Receives Additional Bobjo Mine Drill Results Red Lake, ON


RED LAKE, Ontario, July 18, 2008 (PRIME NEWSWIRE) -- Mainstream Minerals Corp. (TSX-V:MJO) and King's Bay Gold Corp. (TSX-V:KBG) are pleased to announce that they have received additional assay results from their ongoing diamond drilling program at their Bobjo Mine Project, located in Earngey and Agnew Townships, Red Lake, Ontario.

Highlights included 27.43 g/t Au over 1.0 metre.

Included below are the results of Holes # 26 through # 30:


 -------------------------------------------------------------
                      Interval   Interval   Interval     Au
  Hole      Dip         From        To       Metres     (g/T)
 -------------------------------------------------------------
 BJ07-26      -45       8.40        8.70      0.30      16.041
 -------------------------------------------------------------
                        8.70        9.00      0.30       0.983
 -------------------------------------------------------------
                       18.00       18.30      0.30       3.761
 -------------------------------------------------------------
                       18.30       18.60      0.30       0.700
 -------------------------------------------------------------
                       25.80       26.30      0.50       1.200
 -------------------------------------------------------------
                       28.00       28.50      0.50       0.554
 -------------------------------------------------------------
                       30.60       31.10      0.50       4.180
 -------------------------------------------------------------
                       31.10       31.60      0.50       1.722
 -------------------------------------------------------------
                       35.30       35.90      0.60       1.081
 -------------------------------------------------------------
                       43.10       43.40      0.30       1.182
 -------------------------------------------------------------
                       64.10       64.60      0.50       0.696
 -------------------------------------------------------------
                       96.75       97.00      0.25       0.944
 -------------------------------------------------------------
                       61.00      161.50      0.50       3.424
 -------------------------------------------------------------

 -------------------------------------------------------------
 BJ07-27      -65                                          NSV
 -------------------------------------------------------------

 -------------------------------------------------------------
 BJ08-28      -75      77.40       77.70      0.30       1.415
 -------------------------------------------------------------
                       80.00       80.40      0.40       1.454
 -------------------------------------------------------------
                       80.40       81.00      0.60       2.371
 -------------------------------------------------------------
                       87.40       87.90      0.50       3.081
 -------------------------------------------------------------
                       17.00      117.25      0.25       1.430
 -------------------------------------------------------------
                       25.25      126.25      1.00      27.433
 -------------------------------------------------------------
                       42.25      142.50      0.25       1.455
 -------------------------------------------------------------
                       13.25      313.75      0.50       8.229
 -------------------------------------------------------------

 -------------------------------------------------------------
 BJ08-29      -45      13.50       14.00      0.50       0.699
 -------------------------------------------------------------
                       58.50       58.75      0.25       0.904
 -------------------------------------------------------------

 -------------------------------------------------------------
 BJ08-30      -45      50.75       51.25      0.50       1.318
 -------------------------------------------------------------
                       79.75       80.00      0.25       5.943
 -------------------------------------------------------------
                       84.75       85.00      0.25       2.853
 -------------------------------------------------------------

This Phase 2 diamond drilling program is ongoing and additional results will be released when received and verified. Full gold assay results of all thirty holes reported to date can be seen at http://www.mainstreamminerals.com/site/properties/bobjo/resultstable.htm

The partners are pleased with the progress to date at this project and with the fact that drilling has so far intersected gold in twenty five out of thirty holes, which included high-grade gold in many intersections. Rare earth elements, rare metals, and other minerals and metals were also intersected and can be seen at www.mainstreamminerals.com .

This Bobjo Mine project is located between the former South Bay Zinc / Copper Mine and Uchi Lake Gold Mine. It is noted that an existing power line passes through the southern part of the property and that it is within trucking distance to the Placer Dome / Goldcorp Mill in Red Lake, Ontario. The property is comprised of 259 claim units totaling 10,360 acres.

The joint venture is 50 % Mainstream Minerals (TSX.V:MJO) and 50 % Kings Bay Gold (TSX.V:KBG) with Mainstream Minerals being the Operator of the project. John Archibald, A.P.G.O. - Geologist is the Qualified Person under National Instrument 43-101. All of the samples herein were analyzed by Acurassay Labs. True widths are not known.

About Mainstream Minerals

Mainstream Minerals Corporation is a mineral exploration and development company focused on precious metal mining properties with economic potential, with the aim of bringing such properties to commercial production. The Company's portfolio of properties is primarily located in the prolific Red Lake Gold Camp of Northwestern Ontario. The properties include - (i) 50% of the Bobjo Mine project, (ii) 50 % of the Phyllis Lake project, (iii) 50% of the Woman Lake North of South Bay project, and (iv) 100 % of the Stake Lake project. MJO Shares Outstanding: 18,031,087

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release. Some of the statements contained in this release are forward-looking statements, such as estimates and statements that describe MJO's future plans, objectives or goals, including words to the effect that MJO's management expects a stated condition or result to occur. Since forward-looking statements address future events and conditions, by their very nature, they involve inherent risks and uncertainties.


            

Contact Data