Marateca drilling overview

On August 23, 2011, the Company provided an update for the ongoing Marateca drill project in the Pyrite Belt of southern Portugal.  Four holes were completed, though two of these holes did not reach target depth, due to difficult drilling conditions in fault zones and silicified rock units.  Avrupa commenced the drilling in the Serrinha District on the Marateca license in late 2010 with a planned 3-hole, 1300-meter campaign to upgrade the understanding of two classic massive sulfide targets (São Martinho and Monte de Volta) and one stockwork sulfide target (Serrinha). 

The following table details the final status of each hole. 

Target area
Hole ID
Planned
Depth
Final
TD
Comments
São Martinho
SM 11-01
500
400.70
Lost hole; have completed reaming and casing to TD; restarted core drilling, but lost hole in wide fault zone at 400.70 m
Monte de Volta
MV 10-01
500
309.00
Lost hole in fault zone; no decision yet on re-drill
Serrinha
SE 11-01
300
338.80
Reached planned depth, but poor recovery in mineralized target zone at ~ 140-170 meters
Serrinha
SE 11-01A
175
174.40
Re-drill of SE 11-01 to investigate target zone
Totals
4 holes
1475
1222.90
 


The São Martinho hole was originally drilled to 333.60 meters, before being lost due to difficult drilling conditions.  However, the hole was cleaned out and cased to depth, and the Company continued coring towards the geophysical target which lies at a depth of 375-450 meters.  Eventually, the hole was again lost in a wide fault zone at 400 meters, without reaching target stratigraphy.

Drilling at the Monte de Volta target halted above the target zone due to inability to penetrate further.  Avrupa decided not to attempt to re-drill the hole during the 2011 field season.  No decision has been made as to when and how to re-drill either the São Martinho target or the Monte de Volta target.

Avrupa re-drilled the upper portions of the Serrinha hole to collect better samples of the zone of strong alteration and possible mineralization, located at 135.82-184.30 meters in SE 11-01.  A fine grained (-80 mesh), pyrite-rich sludge sample that was collected from a potentially mineralized zone, located at 156.80-168.10 meters in SE 11-01, ran 263 ppm silver, 993 ppm copper, 997 ppm tungsten, and 358 ppm zinc.  The coarse fraction of the same sample ran 80.7 ppm silver and 1060 ppm tungsten.  Core recovery from this interval was less than 5%, and thus the Company collared SE 11-01A, about 10 meters to the southeast of SE 11-01.

The core samples from SE 11-01A are strongly altered, weakly pyritic, and un-mineralized felsic volcanic rocks, while the fine pyrite-rich sludge samples contain up to 77.6 ppm silver, averaging 17.7 ppm silver over the 33-meter collection interval at 141.40-174.40 meters.  Copper values are also weakly anomalous up to 437 ppm, as are tungsten results, to 520 ppm.  The coarse fraction of the sludge also contains anomalous silver values, ranging up to 48.5 ppm over the same interval.  Based on the geochemical results, detailed core logging, and physical appearance of the sludge samples in zones of poor core recovery, it appears that the Serrinha holes intersected a zone of stockwork quartz-pyrite mineralization hosted by strongly altered felsic volcanic rocks.