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Message: Great Panther Silver Updates Drilling Results for San Ignacio Mine Property

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Great Panther Silver Updates Drilling Results for San Ignacio Mine Property

posted on Sep 29, 11 09:53AM (Log in to use the IP Check tool) ^[?]

Press Release Source: Great Panther Silver Limited On Thursday September 29, 2011, 8:20 am EDT

VANCOUVER, BRITISH COLUMBIA--(Marketwire -09/29/11)- GREAT PANTHER SILVER LIMITED (TSX: GPR.TO - News)(AMEX: GPL - News) (the "Company") is pleased to provide an update on the diamond drilling program at the Company's wholly-owned San Ignacio Mine property in Guanajuato, Mexico. Since identifying a high degree of grade variability in the first nine holes (Company news release dated May 24, 2011), Quality Assurance ("QA") procedures were significantly improved and holes ESI10-001 to ESI11-009 have been re-logged, and mineralized zones re-assayed using quarter core sampling. Three of these earlier holes have been twinned and a comparison of half and quartered cores from holes ESI11-010 to 014 has been completed in a study to gauge the reliability of quarter core sampling. Furthermore, holes ESI11-010 to 024 have been completed using the more stringent QA protocols. While it is clear from the additional holes drilled that there is indeed a high degree of grade variability on the San Ignacio Mine project, the QA exercise and extra drilling have provided sufficient confidence in the data for the Company to re-initiate the NI 43-101 compliant mineral resource estimate for the property, to be completed in the fourth quarter 2011.

Seven silver-gold mineralized zones have now been delineated by the 2010-2011 diamond drilling at San Ignacio, namely (from west to east) the Melladito, Intermediate, Intermediate 5, Intermediate 2, Nombre de Dios, Nombre de Dios Footwall 1 ("FW1"), and Nombre de Dios Footwall 2 ("FW2"). Select intersections are listed in the table below, and a complete table of intersections and cross-sections 600N to 900N have been posted on the Company website at www.greatpanther.com. Of primary importance are the Melladito and the three Intermediate zones with significant mineralization up to three metres in true width. Of holes ESI11-010 to ESI11-024, holes ESI11-010 to 013 tested the north end of the various structures; holes ESI11-014, 016 and 017 were twin holes; holes ESI11-015 and ESI11-018 to 021 were fill-in holes; and ESI11-022 to 024 were drilled on the southern extensions of the structures where surface mapping and sampling indicates that the mineralized zones continue in this direction. The mineralized zones have been delineated by drilling for a total strike length of 300 metres and ongoing surface and underground mapping and sampling in old workings has extended the mineralized structures at San Ignacio a further 400 metres south of the above drilling.

Twinned holes, drilled within 15 metres of the original, include ESI10-003 (twinned by ESI11-017), ESI11-007 (twinned by ESI11-016), and ESI11-009 (twinned by ESI11-014). Between holes, the Melladito vein shows quite consistent thickness and grade continuity (ESI10-003 intersected 4.15 metres grading 2.38g/t gold and 176g/t silver while twin hole ESI11-017 intersected 4.27 metres grading 1.76g/t gold and 93g/t silver). However, the Intermediate zones show high variability in thickness and grade, (Intermediate 5 vein in ESI10-003 intersected 4.25 metres grading 2.48g/t gold and 623g/t silver while twin hole ESI11-017 intersected 1.4 metres grading 0.88g/t gold and 94g/t silver). As such, further in-fill drilling is being planned for the mineralized portions of these veins.

A comparison of half core assaying and corresponding quarter core assaying for ESI11-010 to 014 has shown excellent assay correlation values. As such, holes ESI10-001 to ESI11-009 were re-logged and all intersections quarter cored and duly assayed. The master database now contains only the quarter cored assay values for ESI10-001 to ESI11-009, with the previous half core assays being removed for database consistency. In holes ESI10-001 to ESI11-009, significant zones of silver-gold were intersected where silver sulphides were observed in the core.

Presently the drill is working along a 200 metre strike length immediately south of the area drilled by the aforementioned holes. A second drill, originally planned for September, will be added to the project in the first quarter 2012 to expand the drilling further south. This second drill has instead been diverted to drill several deep holes at the Valenciana Mine at the main Guanajuato Complex, and to complete a preliminary drill program at the Company's new Santa Rosa Project.

A further 250 metres south (on section 200N), sampling of the Melladito vein structure in the old Mina San Pablo adit returned composited assays of 2.02g/t gold and 150g/t silver (14 samples across five sections) over an average width of 2.03 metres, and along an accessible strike length of 25 metres. In addition to the original San Ignacio Mine, reconnaissance of the property has identified old mine workings, comprising seven shafts and eight adits, over most of the four kilometre strike length of the property. Detailed geological mapping, geological studies, outcrop sampling, and re-sampling of old underground workings are on-going to highlight additional priority targets along the four kilometres of prospective structures.

The San Ignacio project is located in the La Luz vein system of the Guanajuato silver-gold district. The multiple vein structures are steeply dipping and low sulphidation epithermal in nature. The tops of the mineralized intervals are approximately 80-100 metres below surface in the area presently being explored and many of the vein structures do not surface. Mineralization within the veins appears to occur in shoots but the size and orientation of these have not yet been fully delineated.

 

----------------------------------------------------------------------------
Hole ID                             True                                ZONE
              From      To  Width  Width    Gold  Silver
               (m)     (m)    (m)    (m)   (g/t)   (g/t)
----------------------------------------------------------------------------

----------------------------------------------------------------------------
                                                           Melladito contact
ESI10-001   137.50  138.55   1.05   0.78    2.76     258         fault (MCF)
----------------------------------------------------------------------------
ESI10-001   138.55  142.05   3.50   2.59    1.75     134           Melladito
----------------------------------------------------------------------------
ESI10-001   258.50  261.55   3.05   2.26    1.32      68      Intermediate 5
----------------------------------------------------------------------------
ESI10-001   294.80  296.05   1.25   0.93    4.39       9      Intermediate 3
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI10-002   203.20  210.50   7.30   3.65    0.46      28           Melladito
----------------------------------------------------------------------------
ESI10-002   299.30  300.60   1.30   0.65    2.40       4      Intermediate 2
----------------------------------------------------------------------------
ESI10-002   383.65  384.20   0.55   0.28    10.8    1370      Intermediate 3
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI10-003   147.25  151.40   4.15   2.95    2.38     176           Melladito
----------------------------------------------------------------------------
ESI10-003   268.55  272.80   4.25   3.02    2.48     623      Intermediate 5
----------------------------------------------------------------------------
ESI10-003   340.95  342.60   1.65   1.17    2.73      44      Nombre de Dios
----------------------------------------------------------------------------
ESI10-003   414.55  415.35   0.80   0.57    0.55    1390  Nombre de Dios FW1
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI10-005   192.35  193.95   1.60   1.14    4.62     359      Intermediate 2
----------------------------------------------------------------------------
ESI10-005   237.85  241.75   3.90   2.77    2.77      86      Intermediate 5
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-007   165.40  168.50   3.10   2.20    2.07      41           Melladito
----------------------------------------------------------------------------
ESI11-007   283.80  286.10   2.30   1.63    3.24       9      Intermediate 5
----------------------------------------------------------------------------
ESI11-007   293.85  295.55   1.70   1.21    2.71     205             Unnamed
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-009   158.55  160.40   1.85   1.18    2.21      32           Melladito
----------------------------------------------------------------------------
ESI11-009   269.70  271.70   2.00   1.28    1.27     331      Intermediate 2
----------------------------------------------------------------------------
ESI11-009   332.60  334.45   1.85   1.31    5.07       5      Intermediate 3
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-010   124.75  126.00   1.25   0.80    3.13      28           Melladito
----------------------------------------------------------------------------
ESI11-010   355.85  356.85   1.00   0.64    1.59       3  Nombre de Dios FW1
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-011   200.70  201.25   0.55   0.35    4.70      94      Intermediate 5
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-012    95.50   97.95   2.45   0.83    1.91      70           Melladito
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-013   174.65  176.30   1.65   0.69    1.21      57           Melladito
----------------------------------------------------------------------------
ESI11-013   340.35  340.85   0.50   0.21    3.16      27      Intermediate 2
----------------------------------------------------------------------------
ESI11-013   408.60  409.35   0.75   0.32    5.24      77      Nombre de Dios
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-014   160.45  162.80   2.35   1.50    2.14      37           Melladito
----------------------------------------------------------------------------
ESI11-014   349.95  350.55   0.60   0.38    2.23       6      Nombre de Dios
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-015   248.60  250.60   2.00   1.60    2.89     122      Intermediate 3
----------------------------------------------------------------------------
ESI11-015   288.45  289.00   0.55   0.44    1.83     296      Nombre de Dios
----------------------------------------------------------------------------
ESI11-015   343.00  343.55   0.55   0.44    1.92     122  Nombre de Dios FW1
----------------------------------------------------------------------------
ESI11-015   390.70  391.20   0.50   0.40    7.10     565  Nombre de Dios FW2
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-016   159.40 160.900   1.50   1.07    2.60      70           Melladito
----------------------------------------------------------------------------
ESI11-016   262.30  264.00   1.70   1.31    1.08     127             Unnamed
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-017   141.20  145.47   4.27   3.03    1.76      93           Melladito
----------------------------------------------------------------------------
ESI11-017   217.80  221.30   3.50   2.49    1.04     464      Intermediate 2
----------------------------------------------------------------------------
ESI11-017   340.94  341.53   0.59   0.42    2.60      41      Nombre de Dios
----------------------------------------------------------------------------
ESI11-017   409.90  410.58   0.68   0.48    0.12     270  Nombre de Dios FW1
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-018   200.10  201.00   0.90   0.45    1.08      17           Melladito
----------------------------------------------------------------------------
ESI11-018   309.90  310.40   0.50   0.25    2.76       5      Intermediate 2
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-019   117.43  118.77   1.34   1.03    4.65      74           Melladito
----------------------------------------------------------------------------
ESI11-019   242.91  243.62   0.71   0.55    4.72     275      Intermediate 5
----------------------------------------------------------------------------
ESI11-019   431.25  431.75   0.50   0.39   13.60     192  Nombre de Dios FW2
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-020   186.40  188.65   2.25   1.35    0.98     105           Melladito
----------------------------------------------------------------------------
ESI11-020   188.65  190.25   1.60   0.96    1.18     220                 MCF
----------------------------------------------------------------------------
ESI11-020   278.23  280.35   2.12   1.27    2.94       9      Intermediate 2
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-021    70.90   72.60   1.70   1.24    1.18      10           Melladito
----------------------------------------------------------------------------
ESI11-021   146.60  149.75   3.15   2.30    6.43     187      Intermediate 2
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-022   114.16  114.80   0.64   0.45    1.04      65      Intermediate 2
----------------------------------------------------------------------------
ESI11-022   117.58  118.10   0.52   0.37    0.35     102             Unnamed
----------------------------------------------------------------------------
ESI11-022   178.07  180.85   2.78   1.97    1.11      93           Melladito
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-023   163.00  164.60   1.60   0.80    2.25     209      Intermediate 2
----------------------------------------------------------------------------

----------------------------------------------------------------------------
ESI11-024    74.80   75.90   1.10   1.03    2.07      55             Unnamed
----------------------------------------------------------------------------
ESI11-024   167.50  168.08   0.58   0.29    1.02      15      Nombre de Dios
----------------------------------------------------------------------------

Robert F. Brown, P. Eng. and Vice President of Exploration for the Company is the Qualified Person for the Guanajuato Mine and San Ignacio Mine Project, under the meaning of NI 43-101, and has overseen all of the aforementioned work. A full QA/QC program is being followed including the regular insertion of splits, blanks, and standards into the core sampling sequence. Analysis of the drill core samples is being conducted at the Guanajuato Mine on-site laboratory, independently operated by SGS.

ON BEHALF OF THE BOARD

Robert A. Archer, President & CEO