West African gold explorer, Golden Rim Resources Ltd (ASX: GMR) has identified a number of promising follow up targets following a programme of \rock chip sampling and geophysical data collection as part of the ongoing major exploration campaign at the Kouri Gold Project in Burkina Faso.
The Kogodou Prospect extends for 3.8km to the east of the current 1.4Moz Mineral Resource. Previous rock chip sample results include 42.8g/t gold, 41.2g/t gold, 32.1g/t gold and 22.4g/t gold and new sample results include 32.3g/t gold, 29.2g/t gold, 22.4g/t gold, 14.5g/t gold and 11.7g/t gold. Most of the rock chip samples were collected from mineralisation hosted in volcanic rocks exposed in artisanal workings.
Managing Director Craig Mackay said preliminary ground magnetic data from the recently completed geophysical survey suggests the stronger gold mineralisation at the Kogodou Prospect may be associated with at least four major sub-parallel east-west-trending cross- structures or in areas where east-west and north-east-trending structures intersect (Figure 2). The four east-west cross- structures are labelled on Figure 2 and include the following:
Structure A: The most northern of the cross-structures and the most extensive with at least 13km of strike. It extends west from the Kogodou Prospect to the Guitorga North Prospect (north of the Mineral Resource) and to the Maré Prospect. To the east of the Kogodou Prospect it extends for 3km. It remains unexplored along most of its length. At the Kogodou Prospect a new rock chip sample grading 11.7g/t gold was obtained from the structure. At the Guitorga North Prospect previous auger drilling returned 2.4g/t gold and at the Maré Prospect previous reverse circulation (RC) drilling returned intersections of 4m at 9.2g/t gold, from 44mand 15m at 3.8g/t gold, from 53m (BARC347) on the structure.
Structure B: This cross-structure extends directly to the east from the northern portion of the Mineral Resource for at least 4km. Drilling, including diamond and RC, is currently being conducted along this structure with the objective of extending the Mineral Resource along strike to the east.
Structure C: This cross-structure extends west from the Kogodou Prospect through the centre of the Mineral Resource area. Previous rock chip sample results in the vicinity of this structure at the Kogodou Prospect include: 41.2g/t gold and 14.7g/t gold.
Structure D: The most southern of the cross-structures and extends 6.5km west from the Kogodou Prospect to the southwestern portion of the Mineral Resource where it is known as the Footwall Shear Zone. Previous drill intercepts in the Footwall Shear Zone include: 21m at 5.6g/t from 13m, including 2m at 42.2g/t; and 12m at 1.1g/t from 51m (BARC083) and 4m at 44.7g/t from 34m, including 2m at 89.5g/t (BARC327). New rock chip results related to this structure at the Kogodou Prospect include 32.3g/t gold, 29.2g/t gold, 22.4g/t gold and 14.6g/t gold.
Sampling further east of the Kogodou Prospect is not possible due to the lack of outcrop. The prospective bedrock in this area is covered by river channel sediments (Figure 1). As a result, geochemical targeting in the river channel area will be conducted with auger drilling.
The programme also returned high-grade rock chip samples in two new areas located to the NE of the Mineral Resource.
The first area is located approximately 12.5km from the Mineral Resource. It returned a peak assay of 13.0g/t gold. This zone consists of two parallel lines (about 50m apart) of artisanal workings that each extend for 250m. The location of the gold workings correspond to a magnetic low in the new ground geophysical data and the pressure shadow of a major granodiorite intrusion.
The second new zone is located approximately 18km NE of the Mineral Resource. It returned a peak assay of 24.4g/t gold. This area has not been covered by the new ground geophysical survey.
Planned Follow-up Exploration
During January 2020, five new diamond drill holes were completed along Structure B. Two holes (BADH014 – 015) were completed as infill holes in the existing Mineral Resource and three holes (BADH013 and GDH003 – 004) were completed to test for strike extensions to the gold lodes that comprise the Mineral Resource into the Kogodou Prospect. Assay results are pending for these holes.
A total of 20 RC holes are planned to test approximately 500m of potential new strike to the gold lodes that comprise the Mineral Resource along Structure B at the Kogodou Prospect.
Although high-grade gold in rock chip samples have been obtained throughout the Kogodou Prospect, most of the area has received no geochemical testing due to the sparsity of outcropping rocks. To better define target areas for follow-up RC drilling a programme of auger drilling, on a 200m x 50m pattern, is currently underway at the Kogodou Prospect.