# Panthera Resources survey identifies 28 strong anomalies

- Link: https://www.directorstalkinterviews.com/panthera-resources-survey-identifies-28-strong-anomalies/4121086107
- Published: 2022-10-12T07:06:23+01:00
- Author: Giles

Gold exploration and development company **Panthera Resources Plc** ([LON:PAT](https://www.directorstalkinterviews.com/company/panthera-resources-plc/pat.l)),
with assets in West Africa and India, has announced that it has recently completed
an Induced Polarisation Geophysical Survey (“IP”) and expanded its geological mapping
and outcrop rock sampling at the Bido Project in Burkina Faso.

**Highlights**

·    The geophysical survey has identified 28 strong IP anomalies at Bido

·    Most targets correlate with outcropping mineralised vein systems and or extensive
artisanal workings

·    Survey covers the Beredo and the Somika areas with several other mineralised
domains to be tested including the Kwademen prospect

·    Recent gold in rock sample results identified several outcropping mineralised
vein systems coincident with the strong IP anomalies:

o  42.2g/t Au

o  20.0g/t Au

o  13.6g/t Au

o  13.4g/t Au

o  10.9g/t Au

·    Results from further rock sampling in the survey area are pending

> **Commenting on the announcement, Mark Bolton, Managing Director of Panthera Resources
> said:**
> _“The Bido project is the next in Panthera’s pipeline after Cascades and Bassala.
> Covering 100 km^(2), it contains a considerable number of mineralised gold prospects
> across multiple geological domains. _
> _The geophysical survey has identified_ _28 strong anomalies to date, many of 
> these targets are coincident with extensive artisanal works and/or gold in rock
> sample assays._
> _Following these recent, very positive results, we have expanded the geological
> mapping and rock sampling to cover the remaining area in the north of the survey
> area._
> _The completion of the geophysics, together with the current geological mapping
> exercise, represents the final stage of the present work programmes in this part
> of the Bido licence area, which will then allow for future drilling campaigns 
> to be planned and proposed for budget allocations.”_

**Summary of the Bido Project**

The Bido permit in Burkina Faso is located on the Koudougou quadrangle some 125km
WSW of the capital Ouagadougou. The tenement lies within the Boromo greenstone belt
which is principally composed of Paleoproterozoic Birimian terrain within the West
African Man Craton, consisting of volcano-sedimentary and plutonic domains metamorphosed
during the Eburnean period with even younger intrusive bodies that have been intruded
into both domains.  This belt also hosts the Poura gold deposit (1 to 2 Moz), situated
about 50 km to the SSW of the area, as well as numerous gold occurrences. The Perkoa
VMS deposit is located about 35 km to the north of the area.

**Bido Geophysical Survey**

The IP survey, over an area of approximately 15km^(2), covers the Beredo and the
Somika areas.  The Company targeted this volcanic centre with its maiden geophysical
survey at Bido, where previous geochemical work, including recent rock sampling,
had returned very promising results.  These areas also host extensive active artisanal
workings.

The survey has characterised three extensive features described in the following,
in which some 47 anomalies, including 28 high-priority ones, have been identified.
The Company is currently evaluating the survey results in conjunction with its extensive
geoscientific information and in particular the recent mapping and rock sampling.
Preliminary analysis indicates multiple targets where the strong/moderate IP Axes
defined from interpreted resistive and conductive structures defined by the IP survey
are coincident with mapped vein structures, gold in rock samples and artisanal workings.

Following the completion of the data review, the Company will prioritise the targets
for future drilling.

_Geophysical Survey_

The Company contracted SAGAX AFRIQUE SA to conduct an IP geophysical survey over
several grids located in the Bido licence area before the onset of the wet season.
The work consisted of approximately 200-line km of Gradient Array (100m x 25m grids)
over the Beredo and Somika areas with follow-up Pole – Dipole Array IP/Resistivity
Surveys (a = 50m, n =1 to 10) as appropriate to define drill targets.

The survey has characterised three extensive chargeability features, the western
corridor (Zone W), the central wide corridor (Zone C) and the eastern corridor (
Zone E).  Zone E incorporates the eastern section of Beredo and the Somika grid.

Zone W comprises a pervasive north-south chargeable high (2.5-6 mV/V).  Zone C comprises
many well-defined chargeability individualized axes through the centre of this corridor.
Zone E displays similar characteristics as Zone C with well-defined chargeability
individualized axes, particularly in the far north, far south and east.

During 2021-22, rock sampling was carried out over outcrops of sheared country rock
containing quartz veining identified by our geological mapping campaigns, often 
located in areas associated with shallow artisanal gold diggings. At least five 
localities have been sampled at strike lengths of over 500 metres, returning gold
values greater than 1 ppm.

It is interpreted that the central corridor may define a shear zone trending NNE(
N5^(o)-N10^(o)), within which numerous broadly similar-trending, highly chargeable
structures may represent altered and sheared intermediate metavolcanic or other 
intrusive rock.

Similar chargeable anomalies observed on other portions of the grid have broadly
comparable trends.

The resistivity survey results have been superimposed on the gold in rock sampling
assays.  It is speculated that the resistive zones may represent higher quartz content
associated with silica flooding of altered and structural country rock.

**Pole-Dipole IP Survey Data and Results**

In addition to the gradient array IP survey, the Company completed Pole-Dipole survey
lines at Beredo-Kiékouyou (4 lines) and Somika (2 lines). The Pole-dipole line locations
were located based on previous knowledge of the occurrence of gold in artisanal 
workings, known areas of mineralised veining and the results of the gradient array
IP that indicated interesting zones. A Pole-dipole array is commonly used for vertical
investigation.

The survey measured the resistivity and chargeability properties on the cross-section
of each survey line.  The data was utilised to plot the resistivity and chargeability
inversion pseudo sections, the pseudo-lithology cross-section as well as the gradient
chargeability contours map around the pole-dipole surveyed lines.

The depth of investigation of these Pole-Dipole surveys (a=50M, n=1 to 10) is between
200m and 250m. The anomalies pointed out with the gradient array survey are identified
in these sections. The three anomalous corridor zones (Western zone, central Zone,
and Eastern zone) are also identified here.

The resistivity sections (UBC Resistivity) detail the geometry (relief) of the interface
between the conductive clayey covering horizon, interpreted as saprolite, and the
underlying resistive bedrock, interpreted as intrusive.  The latter is affected 
by many syn-geological deformations (Faults/micro-faults/shearing) reflected by 
local thickening of the conductive covering. These faults are represented by the
conductive axes on the gradient map.

Line 20400N in the Beredo area is indicative of the pole-dipole survey in this area.
The B12-13 anomaly identified by the survey corresponds to a target where rock sampling
has returned multiple gold values over 1g/t Au over 1 km strike length including:

·       6.8g/t Au

·       10.9g/t Au

·       6.2g/t Au

·       13.6g/t Au

·       13.4.9g/t Au

·       20.0g/t Au

At the Somika prospect, the pole-dipole survey below has highlighted the eastern
chargeability corridor. The survey infers a felsic intrusion buried under a conductive
covering and affected by geo-structural deformations.

The chargeability and the resistivity inversion sections assist in determining the
dip of the rock formations, thus assisting in planning drill orientation. At Somika,
we consider that the survey has identified sub-vertical structures, undercover, 
that are on occasion slightly easterly dipping.

Line 29900N is indicative of the pole-dipole survey at the Somika prospect where
the survey has identified a strong anomaly extending at depth at S1 and S4.  As 
mentioned earlier there is an observed conductive covering indicated by the data
interpretation and in the field that is identified as laterite and saprock to the
west of this zone at the Somika Hill artisanal workings (B7/10 anomaly) intermittent
sheared and veined country rock (Altered felsic?) has been exposed at several locations.

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