Star Zinc Project Drilling Results

 RNS Number : 9552N

Galileo Resources PLC

 

14 May 2018

Galileo Resources Plc

(“Galileo” or “the Company”)

Star Zinc Drilling Results

 

Galileo is pleased to announce results* for the final eight diamond drill holes of its 26-hole drilling programme on the Zambian Star Zinc project (“Star Zinc”), in which the Company has an 85% interest.  These holes were drilled in the southern periphery of the historic mineralised zone. 

Highlights

 

·          Assay results received for the final eight diamond drill holes (“DDH)” of the 26-DDH programme on the Star Zinc project (see Table 1) at depths downhole to 63 metres (m).

 

·          These DDHs were mainly proximal to the southern periphery of the historic mineralised body.

 

·          Four holes, DDH020 (west) and D DHs 024 to 026 (east) show medium to high grade zinc (Zn) mineralisation from 4.72% Zn to 15.4% Zn.

 

·          DDH020 shows 6.21% Zn over 24 metres (m) width downhole (from 31 to 55m downhole) including 14.3% Zn over 8m width. DDH024 shows 5.02% Zn over 26m from near-surface (3 m) including 3m assaying 10.80% Zn from 17 to 20 m.  DDH025 shows 8.29% Zn over 29m from surface, including 13m assaying 15.4% Zn. 

 

·          Independent consulting geologists engaged to develop a conceptual 3D-model and grade-tonnage estimate for the deposit based on the drill data.

 

·          Continued presence of germanium (Ge) values, up to 19 ppm (g/t) associated with Zn mineralisation, and up to 47g/t silver (Ag) (in DDH022) recorded in the intersections.   Germanium has been trading at  $2300/kg  ($2.3/g) b

 

  *  all assays  subject to final  QAQC analysis

b    07 May 2018 http://www.kitco.com/strategic-metals/  Germanium is used mainly in semiconductors in transistors and electronic, and end uses include  fibre-optic systems, infrared opticssolar cell applications, and light-emitting diodes (LEDs)

 

Colin Bird, Chief Executive Officer, said:  “This final batch of results support our view that the project will be boosted by peripheral, at or near-surface,  mineralised karsts and zinc oxides. At a cut-off grade of 3% zinc, (based on the fact that the deposit  is very close to surface), this would potentially require little or no blasting. We have engaged an independent geological consultant to develop, amongst other things, a conceptual (3D-model) grade-tonnage estimate based on differentiation of the  material into medium (3-20% Zn) and high grade (>20% Zn) domains.

We expect from this exercise and futher study to be able to direct the next exploration and drilling programme with a view to further increasing the  size of the deposit and to generate a compliant maiden resource estimate To complement this, we  are currently evaluating the results from a collection of physical core rock property measurements in relation to potential geophysical exploration methods in order to assess suitability and determination of the most optimal exploration drill-targeting tool. 

We will report on the modelling results, which are expected at  the beginning of June”

 

Drilling Note

 

DDHs SZDD019, SZDD020 & SZDD021 represent a 2nd fence line through the western core of the deposit. DDH SZDD022 tested the western strike extension. DDHs SZDD024- SZDD026 represent the holes testing the main mineralised zone in the east.

 

Zn mineralisation in the deposit comprises broadly:

 

·          in the West, high grade semi massive Willemite mineralisation, vein hosted mineralisation and replacement style mineralisation hosted within dolomitic limestone. Rarer occurrences are  breccia hosted and vein hosted within argillite

 

·          in the East, haematite- stained argillaceous /shaly limestones hosting mineralisation – typically as replacement style mineralisation with a lower frequency of vein hosted style (compared to the West)

 

·          in both the East and West,  supergene Zn is present in karsts, fault zones and highly weathered fracture zones as well as associated with ferruginous pisolitic laterite and soil material.

 

Table 1 – Selected drilling results – Final 8 holes of 26-hole drilling programme b  

Hole ID

Downhole  (metres)

Assay  (weighted average) c

Gross in-situ value **

$/t rock e

From

To

Width

Zn

%

Ge 1

ppm

Ag 1

ppm

SZDD013

41

48

7

1.08

0.6

5

36

 

 

 

 

 

 

 

 

SZDD019

44

59

15

2.03

1.7

2

66

 

 

 

 

 

 

 

 

SZDD020

31

55

24

6.21

9.3

13

215

 including

32

40

8

14.3 d

21

23

483

 

 

 

 

 

 

 

 

SZDD021

28

33

5

2.63

6

23

105

 

 

 

 

 

 

 

 

SZDD022

61

63

2

3.6

1.3

47

136

 

 

 

 

 

 

 

 

SZDD024

3

24

21

5.02

2.2

8

160

including

13

14

1

11.24 d

2

7

345

including 

17

20

3

10.8 d

3.3

11

337

 

 

 

 

 

 

 

 

SZDD025

0

29

29

8.29

5.5

12

297

 including

14

27

13

15.4 d

8.9

19

492

 

 

 

 

 

 

 

 

SZDD026

12

27

15

4.72

1

10

149

 including

18

20

2

10.45 d

2

7

321

 

Core sampling criteria includes:  

– No High Grade Cut

– Max. 3m Internal dilution

>1 m Minimum Width (mineralization)

Cavities where no sampled  – Treated as Core Loss / Dilution 

 

1  figures rounded

** the figures in this column are simply a calculation of grade multiplied by price (as set out in f below) and should not be considered a guide to the value of recoverable material at this stage  

b   Analysis by Accredited Intertek Genalysis Laboratory Services:    Zn and Ge by peroxide fusion finish with  ICP-OES/MS;  Ag by 4-Acid digestion with MS. Analyses  subject QA/QC  quality assurance/checks

c    0.4% nominal Zn cut unless otherwise indicated

 d  10% nominal Zn cut

 Zn $3000/t;  Ge $2300/kg;   Ag $16/oz

 

This announcement contains inside information for the purposes of Article 7 of Regulation 596/2014.

 

Technical Sign-Off

 

Andrew Sarosi, Director of Galileo, who holds a B.Sc. Metallurgy and M.Sc. Engineering, University of Witwatersrand and is a member of the Institute of Materials, Minerals and Mining, is a “qualified person” as defined under the AIM Rules for Companies and a competent person under the reporting standards. The technical parts of this announcement have been prepared under Andrew’s supervision and he has approved the release of this announcement.

 

You can also follow Galileo on Twitter: @GalileoResource

 

For further information, please contact: Galileo Resources PLC

 

Colin Bird, Chairman

Andrew Sarosi, Executive Director

Tel +44 (0) 20 7581 4477

Tel +44 (0) 1752 221937

Beaumont Cornish Limited – Nomad & Joint Broker

Roland Cornish/James Biddle

Tel +44 (0) 20 7628 3396

Novum Securities Limited – Joint Broker

Colin Rowbury /Jon Belliss

+44 (0) 20 7399 9400

 

The Star Zinc Project

The Star Zinc project is a historical small-scale open pit mine from where, reportedly, low tonnage, but high grade willemite (a zinc silicate mineral) was extracted intermittently in the 1950s to 1990s.

 

The Star Zinc project is located approximately 18km NNW of Lusaka (see Figure 3.1 below), and is accessible via the tarred “Great North Road” and a good all weather graded road, with the journey time from central Lusaka of approximately 30 minutes (traffic allowing).

 

There is adequate power, water, rail & telecommunications, with the International Airport at Lusaka, less than 45 minutes away.

 

The Mines and Minerals Development Act No. 11 of 2015 , which grants a Large Scale Prospecting Licence provides for an initial 4 years with a further two 3-year extensions totalling 10 years, with a mandatory 50% reduction of licence area at the completion of the 1st grant and 2nd grant periods respectively. The first renewal period initially expired 13 August 2016 but was extended to 13 August 2018.  The Company has submitted an application for the next renewal period.

 

The Star Zinc Willemite project was mapped in the 1960s by several geologists of the Northern Rhodesia (now Zambia) Geological Survey.

 

At Star Zinc, two main fracture trends are present, one E – W, and another N – S. Both sets of fractures are nearly vertical and are irregularly mineralised. Willemite generally replaces the host rock marbles in the form of massive ore bodies, but it occurs also in veins

 

In addition, karstic (pertaining to landscape underlain by limestone which has been eroded by dissolution, producing ridges, fissures, sinkholes and other characteristic landforms) mineralisation and red soils (terra rossa) are locally heavily mineralised with detrital willemite and supergene zinc minerals. Zinc values measured in soils at Star Zinc reach up to 15,600 ppm and are accompanied by the pathfinder elements Ag (silver), Pb (lead), Ba (barium), Sb (antimony) and Cd (cadmium). The karst infill has a zinc (Zn) content up to 45wt.% Zn, up to 35wt.% Fe and up to 5g/t Ag.

 

The mineralogical assemblage of Zn nonsulphides includes a whole number of minerals, but the main economic phases present are Zn-silicates (willemite, hemimorphite, Zn-bearing clays), Zn- Pb carbonates (smithsonite, cerussite), hydrated Zn- Pb carbonates (hydrozincite, hydrocerussite) and Zn- Mn- Fe- oxides (zincite, franklinite, gahnite).

 

Limited independent metallurgical testwork by others has clearly shown that the willemite present at Star Zinc is amenable to acid leaching with positive results for two samples tested. Zinc leaching efficiencies obtained ranged from 89% and 92%.  The testwork indicated polymerisation of dissolved silica in the leachate.  

 

An independent competent person’s report commissioned by BMR concluded. In summary, the Star Zinc project has good potential to become a viable project.

 

Note:  the information about Star Zinc is sourced primarily from Competent Person’s Report for the Star Zinc Project, Zambia; Wardell Armstrong, January 2016

 

 

Glossary

 

Argillaceous       of rocks or sediment) consisting of or containing clay.

                               

Detrital                loose fragments or grains that have been worn away from rock

Calcite                  mineral of calcium carbonate

Dolomite             mineral composed of calcium magnesium carbonate

Dolomitic            pertaining to dolomite  

Floats                    pieces of rock that have been removed and transported from their original outcrop

Hematite             reddish-black mineral consisting of ferric (iron) oxide.

ICP-OES/MS       inductively coupled plasma  – optical emission spectrometery/mass spectrometery

Karstic                  pertaining to landscape underlain by limestone (calcium carbonate), which has been eroded by dissolution, producing ridges, fissures and so on

 

Laterite                                a soil and rock type rich in iron and aluminium,

Leaching              chemical process of solubilising metals in rock into solution

Pisolitic                pertaining to pisolite a rock comprising pea-sized concentric formations within a fine matrix 

ppm                       parts per million

XRF Spectrometer           analytical instrument for determining chemical composition using x-ray fluorescence  

 

Supergene              pertaining to processes or enrichment that occurs relatively near surface 

Willemite           zinc silicate ore mineral


This information is provided by RNS

The company news service from the London Stock Exchange

 

END