Avnel Gold Mining Limited
Home | About Us | Corporate | Mining Operations | Exploration | Financials | Investor Relations | Mali | Contact Us
 
Home > Exploration > Kalana Permit > Exploration Highlights
Back
 

Summary Phase 4 Exploration Program

RC Drill Program on Grid 8 and Grid 7A

RC drilling was carried out at the Djirila discovery in quarter 2, 2006.  9 holes tested the near surface block within the Djirila Main Mineralized zone and 9 step out holes to test the continuity

  • Six of the nine drill holes testing the near-surface, up-dip block at the Djirila Main Zone returned significant intersections and confirm that gold mineralization continues to surface. The best intersections include: 15.8g/t over 2m from 53-55m, and 10.1g/t over 1m from 59-60m in RC-28; 2.1g/t over 2m from 24-26m and 4.7g/t over 2m from 96-98m in RC-29; 2.2g/t over 1m from 17-18m and 4.6g/t over 1m from 100-101m in RC-31; 4.4g/t over 1m from 88-89m and 4.4g/t over 1m from 96-97m in RC-32; 9.7g/t over 3m from 84-87m and 2.0g/t over 1m from 94-95m in RC-33.
LONGITUDINAL SECTION ALONG THE DJIRILA MAIN ZONE, VIEWED TO WEST
  • Of the 9 step-out holes, 5 holes returned anomalous intersections above 1g/t (RC-35, RC-36, RC-46, RC-47, RC-48). RC-35 and 36 are located along the SW part of the Djirila Main Zone, RC-47 and RC-48 are located along the NE extension of the Djirila Main Zone and RC-46 is located near an artisanal mining zone located west of the Djirila Main Zone.
  • A longitudinal section along the Djirila Main Zone is presented in figure 3. All significant values to date are shown on the section, including the 2005 Phase IV DDH drill campaign (yellow background) and the 2006 Phase IV RC drill campaign (blue background).
  • The drill results indicate that mineralization  extends up dip towards surface and remains open below 100m

Thirty holes, inclined at -50 degrees, were drilled in Grid-7A totaling 2,525m. The holes were located in the Tonda anomalies, to the north, and in the Dabaran West anomalies, to the south.

The results returned for the Grid-7A area (Tonda and Dabaran West anomalies) indicate that the mineralized systems in this grid area appear to have more modest grades and widths in the near-surface environment.

 

Geochemical Soil Sampling Program February – March 2006

Soil sampling was carried out north, south and east of the operating Kalana Mine (grids 10B and between grids 5 and 6) as shown in Fig 2. The highlights are summarised below:

  • Zone A is characterised by high Au values above the 98th percentile and has produced significant Au-in –soil within 1.0 kilometres of the Kalana Mine. There are at least two drill targets including a possible extension of the Kalana II open pit resource.
  • Zone B hosts several significant Au-anomalous zones. In particular a new anomaly (B-2) that encompasses an area of approximately 1,000m by 400m lies to the west of the previously identified Kalanako prospect, and represents a drill target.
  • Zone C is host to a very significant orpaillage site (zone B-10 to C-2) with more than 3,500 orpailleurs pits that stretch in a north easterly direction for over 1.5 km.
Figure 2: Gold anomolism pattern in the Kalana area

In the Dabaran area soil sampling was completed on grid 7B, east of grid 7A that was sampled in 2005. The highlights are summarised below and are shown on Fig 3:

  • Four main Au anomalies have been identified.
  • Despite the relatively low values the dimensions up to 2.5km in length are important.
  • The pattern of the Au anomalism of the southern clusters is somewhat different to the majority of the Permit. The preferred ENE orientation of the soil anomalism is probably controlled by the large, donut-shaped intrusion that lies immediately to the south.

Figure 3: Gold anomolism pattern in the Dabaran area

 

Diamond Drilling Program November 2005- January 2006

  • Diamond core holes DDH-01 to DDH-06 and DDH-11 to DDH-14 were designed to test the strike and continuity of the high grade mineralization discovered at Djirila Main in the Phase 3 program.
  • The gold mineralisation in the Djirila Main Zone is best developed in DDH-02 (11.14g/t Au over 24m from 68-92m and 4.81g/t Au over 10m from 136-146m), in DDH-06 (14.57g/t Au over 3m from 98-101m), in DDH-11 (19.3g/t Au over 2m from 46-48m, 12.55g/t Au over 19m from 80-99m and 5.72g/t Au over 2m from 120-122m), in DDH-12 (3.04g/t Au over 7m from 92-99m), in DDH-13 (3.74g/t Au over 14m from 98-112m), and in DDH-14 (3.14g/t Au over 3m from 113-116m).
  • This mineralised zone has now been traced by diamond core drilling along a NNE strike for more than 225m where it has been found to have a vertical to steep easterly dip. 
Phase 4
  • The width of the mineralised zone varies from 3 to 50 metres and appears to be associated with a NNE-trending corridor of faulting and silica-sulphide emplacement.  The zone of artisanal workings stretches another 150m beyond the present drill program. 
  • A ground geophysical survey (IP) conducted over the Djirila Hill area has outlined a linear zone marked by both resistivity and chargeability anomalies parallel to the Djirila Main Zone verifying the presence of the quartz vein network and anomalous sulphides that have been found in the core drill program.  The continuation of the geophysical anomalies to the north and south of the present DDH locations indicates that the Djirila Main Zone may have additional significant strike length.
  • The high-grade gold intersections, combined with the +100m deep saprolite development in the area, bode well for a future open-extraction mining method.
  • Gold mineralisation is hosted within a sequence of altered Birimian volcanoclastic and sedimentary rocks (e.g., lithic-crystal tuff, lapilli tuff, shale). Some of the mineralised intersections are clearly related to quartz veins while other parts of the mineralised zones are related to silicified and sulphide-rich sedimentary rocks that contain abundant pyrite and arsenopyrite.
  • The drill intersections are shown on an approximate longitudinal section along the Djirila Main Zone in figure 3.
  • A follow-on Reverse Circulation program is currently in the planning and budgeting stages. The emphasis of the next drill program, probably in quarter 2 2006, will be to continue to build a mineral resource base at the new gold discovery. RC holes will be targeting the continuity of the zone from 100m below surface up to surface.
  • The results from the diamond drill holes, designed to verify the anomalous RAB intersections in the Djirila South Zone in the phase 3 program did not reproduce the same significant results.

Summary Phase 3 Exploration Program

  • High grade gold mineralization intersected in a new gold discovery.
  • Two main mineralised zones identified, namely Djirila Main and Djirila South, located near the Djirila Hill.
  • Djirila Main zone is interpreted as a NE-trending, fault controlled, quartz-vein-stockwork. This zone is characterised by high-grade gold mineralisation and produced highly significant gold assay intervals (e.g. 73.6g/t over 2m from 70 to 72m in RC-09a, and 45.9g/t Au over 4m from 114 to 118m in RC-15 ). In addition, the Djirila Main zone may contain significant widths of lower grade intersections (e.g., 5.4g/t Au over 36m from 64 to 100m in RC-09a).
  • The Djirila South zone is interpreted as a NE-trending, fault-controlled, quartz-vein-stockwork zone located on the SE side of Djirila hill (see Figure 29). This zone is characterised by significant but lower grade mineralisation and produced several significant gold assay intervals (e.g., 4.1g/t Au over 6m from 17 to 23m in RAB-090, and 8.3g/t Au over 22m from 35 to 57m in RAB-118).
  • Mineralsised zones are associated with quartz veins as well as silicified and sulphide-rich sedimentary rocks that contain abundant pryrite and arsenopyrite.
  • Six of the holes reporting significant gold intersections ended in mineralsation.
Location of proposed DDH and RC holes, Grid Area 8
  • Silicification and the presence of abundant sulphides associated with gold within the sedimentary rocks augers well for a disseminated-style deposit of the Morila type, a multi-million ounce resource located east of the Kalana Permit.

Summary Phase 2 Exploration Program

  • Three additional, significant Au-in-soil anomalies have been identified in the Phase II soil geochemistry programme within the Kalana exploitation permit.
  • Phase II field activities were completed in quarter 4 2005. A total of 1,907 soil samples were collected within 5 grid areas. The grids completed in the Phase II programme are: Grid #5B, Grid #7A, Grid #8B, Grid #10, and Grid #11 (See Figure 1).
  • Gold anomalism in Grid #10 forms a NW- to WNW-trending, linear band attaining a strike extent of 2.5km and a maximum width extent of 1km (open to the west). Gold anomalism in Grid #7A forms a NW-trending band attaining a possible strike extent of 2km and a maximum width extent of 800m. In Grid #11, four small clusters of anomalous Au values are aligned in a NW direction, which collectively form an anomalous linear feature of 2km in strike length (See Figure 2).
Gold Map Geochemical Survey Grids
  • All significant Au-in-soil anomalies are directly associated with corresponding As anomalies, which indicates that As is a primary gold associate or pathfinder. This relationship also implies that the Au anomalies are close to source.
  • The rare earth element maps (e.g., Y, La, and Li) continue to clearly delineate alluvial and fluvial soils related to deposition in topographically-low drainage basins. In most cases (Grids #10, #7A, and #11) this transported soil masks or hides parts of linear Au-in-soil anomalies of significant length.

Summary Phase 1 Exploration Program  

  • Significant Au-in-soil anomalies have been obtained within the selected soil survey grids within the Kalana exploitation permit. Six of the seven grids sampled and analyzed have produced gold-in-soil anomalies with coherent patterns of anomaly with >1km strike length and >200-300m width.
  • Over forty years of reports and data concerning the Kalana mine and environs have been evaluated and parts of this database have been incorporated into a project database for the regional exploration initiative of SOMIKA S.A.
  • The Phase I field activities of the 2004 exploration programme within the Kalana exploitation permit were accomplished in the period May – June 2004. A total of 2,854 soil samples were collected within seven grid areas (see Figure 1).
  • Au-As correlation maps show a good correlation of these two elements indicating that the significant anomalies are probably ‘rooted’ or very close to source.
  • Geochemical Survey Grids
  • Rare earth element maps (e.g., Y and La) clearly delineate alluvial and fluvial material related to drainage deposition (i.e., transported soil medium) that masks or hides parts of elongate or linear Au-in-soil anomalies of significant strike length (e.g., Grids #8, #2, #5, #4).
  • Grid #8 has produced outstanding results in terms of the strength of the main anomaly, the potential strike length of the anomaly, and its strong correlation with As. Hand samples have returned >20g/t Au from quartz material and >2g/t Au from metasediment.
  • During the Phase I exploration programme, sixty-one pits and one trench were studied within the Kalana exploitation permit area. Their primary purpose was to observe the pedogenic relationship with underlying material. A good understanding of the soil sample medium in various places within the permit area has been accomplished.
  • An astounding number of orpailleurs pits and excavations have been found within the permit area and more than 10,000 pits of different generations have been located by GPS.
  •  
    Copyright Avnel Gold Mining Limited 2007 | All Rights Reserved