Trenching Defining Gold Zones at Mariposa GOLD

Pacific Ridge Exploration Ltd. (TSX Venture: PEX) reports gold assays received for the first two of five trenches recently excavated on its Mariposa property  located in the White Gold area of Yukon’s South Klondike.

Assays from backhoe trenching are reporting broad intervals of gold mineralization  within  the open-ended, 1100 by 600 metre, Skookum Jim geochemical  anomaly which contains  gold-in-soil values reaching 1,500 ppb (parts per billion) gold.

Trench SJ-2 was excavated 590 metres in length within which the following gold zones have been identified:

                                   Interval (metres)          Length (metres)      Gold (grams/tonne; fire assay)  
                                            150 -255                         105                                  0.67
Includes                             150- 200                          50                                   0.91
Including                            150- 180                          30                                   1.25
                                             225- 255                          30                                   0.76
Includes                             225- 235                          10                                   1.17

Trench SJ-2 was excavated to an approximate one metre depth with composite rock samples collected over 5-metre intervals. Sections of subcrop and rubble indicate near bedrock sources. Rock type within zones hosting gold values consists of altered and oxidized gneiss, schist and quartzite which host quartz veining, stockwork fractures and breccia with minor sulphide mineralization and hematite. The presence of widespread limonite as disseminations and fracture fills, as well as quartz stockworks and both hydrothermal and tectonic breccias provide clear evidence that brittle deformation and hydrothermal activity has affected this area.

Trench SJ-2  comprises a significant target for diamond drill testing  early in the 2011 field season.

Trench SJ-1, located 200 metres west of trench  SJ-2 was excavated over a 240 metre length reporting  anomalous gold, averaging 3210 ppb  over 5 metres from 20 to 25 metres and 492 ppb Au over 5 metres from 155 to 160 metres within altered zones exhibiting quartz veining.

Assays are pending for trenches S-J  3, 4, and 5 .

One trench was completed within the Maisy May gold-in-soils anomaly, for which assays are pending.

Pacific Ridge will report trench assays and additional soil sampling results as will be received during the balance of the year.  With the onset of winter conditions on-going exploration in the field will see resumption during the spring of 2011.                                                                                                                                                                                                  

“John S. Brock”
John S. Brock

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