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Thundelarra Exploration

Publié le 25 avril 2016

VHMS Target Identified At Depth At Red Bore

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VHMS Target Identified At Depth At Red Bore

782f46d0-7108-4b92-a6f1-3f6a52654eaa.pdf

ASX/Media Announcement

26 April 2016

VHMS TARGET IDENTIFIED AT DEPTH AT RED BORE

Thundelarra is pleased to announce that it has identified an exciting VHMS target at depth at Red Bore. The latest diamond drilling confirms the geological setting for VHMS ("volcanic-hosted massive sulphide") mineralisation. The rock types, geochemistry, structures and the relationships between each of these factors has combined with re-interpretation of earlier gravity data to identify this target.

Highlights:

  • Re-processed gravity data has revealed a target at 500m+ below surface, centred about 170m NW of Gossan. Possible interpretations include:

    • a lens of VHMS (massive sulphides);

    • a major feeder for the Gossan mineralisation;

    • a fold nose of mineralised volcaniclastics; or

    • a plug of mineralised mafic intrusion (basal gabbro?).

  • Detailed petrography confirms the setting has potential for VHMS

  • Further similarities to the Monty VHMS deposit confirmed: host sequence at Red Bore is bounded above and below by dolerite sills, as at Monty.

  • Approval to test this target in the June Quarter is currently underway.

    Gold:

  • PoWs approved for Mooloogool and Garden Gully prospects

  • HPAs (Heritage Agreements) signed by Traditional Owners

  • Heritage clearance discussions underway to gain access to explore

  • Drilling to commence upon completion of statutory processes

CEO Tony Lofthouse expressed immense satisfaction with progress at Red Bore. Technical rigour has been the key to exploration since restarting in April 2014, continually improving the geological model and helping direct exploration towards what we believe will be a discovery.

"Doolgunna is the place to be for VHMS exploration at the moment. Discoveries like Monty assist all the local explorers and the similarities we are seeing at Red Bore to both De Grussa and Monty promise much for our future exploration. The deep gravity target just north-west of Gossan, in the correct suite of rocks bounded by dolerite sills above and below, like at Monty, has us all very excited about the next stage of drilling, which we are planning now for the June Quarter."

Thundelarra Limited | ABN: 74 950 465 654 | Level 1, 186 Hampden Rd, Nedlands WA 6009 | PO Box 7363, Cloisters Square, WA, 6850

www.thundelarra.com.au | [email protected] | Tel: +61 8 9389 6927 | Fax: +61 8 9389 5593

The Red Bore project, 90%-owned by Thundelarra, is a two square kilometre granted Mining Licence (M52/597) located in Western Australia's Doolgunna region (Figure1).

Figure 1. Location map of Red Bore and Curara Well Projects showing proximity to DeGrussa copper-gold mine (Sandfire Resources NL). Scale: grid spacing is 30 km.

Hole

East

North

RL

Depth

Dip

Azimuth

Prospect

Licence

TRBD010

735074

7172384

575m

217m

-65o

189o

Impaler

M52/597

TRBD011

735036

7172342

575m

195m

-60o

0o

Impaler

M52/597

TRBD012

735920

7172537

580m

292m

-83o

177o

Gossan

M52/597

TRBC107

735067

7172249

575m

211m

-60o

010o

Impaler

M52/597

TRBC108

735129

7172290

576m

168m

-60o

330o

Impaler

M52/597

TRBC109

735057

7172434

574m

157m

-60o

347o

Impaler

M52/597

TRBC110

736088

7172315

574m

115m

-60o

338o

Unnamed

M52/597

TRBC111

736407

7172585

574m

163m

-60o

358o

Jaspilite

M52/597

TRBD013

735025

7172259

575m

506.6m

-75o

021o

Impaler

M52/597

TRBD014

735830

7172443

580m

490.7m

-75o

049o

Gossan

M52/597

Table 1. Details of the holes drilled in this programme at Red Bore. "TRBD" denotes diamond holes; "TRBC" are Reverse Circulation holes. All locations on Australian Geodetic Grid GDA94-50. The azimuth column records the magnetic azimuth of the drilling direction.

The programme had four main objectives:

  • To improve the understanding, and to test for extensions, of the Impaler mineralisation by diamond drilling. It was hoped that core samples would give clearer geological information from the zones where earlier reverse circulation drilling had encountered broken ground;

  • To improve the understanding of the mineralisation at depth at Gossan;

  • To re-visit the Jaspilite target to the east of Gossan that was previously tested by RC;

  • To re-visit a target south-east of Gossan, located close to the southern tenement boundary.

This announcement provides previously unreported results from TRBC107-111 and TRBD013-014.

The presence of peperitic (Figure 2) and other textures in the core in these holes at both Impaler and Gossan provided further geological evidence that the package of Interfingered volcaniclastic sediments, basalts, plus the dolerites, does indeed represent a geological setting with the potential to host VHMS mineralisation.

Figure 2. Peperitic texture: ~400m downhole in TRBDD013 at Impaler. Scale: core is 5cm wide.

This provided the rationale for undertaking laboratory multi-element assays to deliver greater accuracy than the readings obtained to date from hand-held XRF Analyser. These anomalous pathfinder elements (including Zn, Pb, Mo, As, Bi, Sn, Se, Ag, Au) also validate the potential for VHMS settings (refer Table 2; Appendix 1; and ASX announcement dated 29 March 2016).

VHMS Pathfinders

Element

Zinc

Lead

Moly

Arsenic

Bismuth

Gold

Unit

ppm

ppm

ppm

ppm

ppm

ppb

Background

100

35

0.7

27

0.4

80

Anomalous cut-off (3 x background)

300

100

2.0

75

1.0

250

Hole No

From

To

Interval

Zn

Pb

Mo

As

Bi

Au

TRBC107

124

133

9m

194

6.0

TRBC108

84

92

8m

273

158

4.1

TRBC110

6

18

12m

5.4

0.8

TRBD010

20.7

51

29.3m

591

262

126

2.5

TRBD011

29

33

4m

559

858

140

7.3

TRBD012

26

46

20m

472

24.1

1.4

538

66

75

9m

279

10.8

559

TRBD013

279

291

12m

1.4

394

397

3m

296

1.0

Table 2. Significant drill intercepts of anomalous VHMS pathfinder elements. See Appendix 1 for all assays.

This programme intersected the first primary copper mineralisation, displaying representative VHMS-style characteristics, seen at Impaler (Figures 2, 3, 4). The copper-gold-silver mineralisation previously reported there has been secondary / supergene in nature.

Figure 3. 395m in TRBDD013 at Impaler. Figure 4. 399m in TRBDD013 at Impaler. Primary sulphide fiamme in volcaniclastics. Primary sulphide, possibly remobilised.

The structural interpretation around Impaler (Figure 5), together with the geological information from hole TRBDD013, indicates that the package of rocks at depth is in the correct setting for the VHMS mineralisation sought. The volcaniclastics displaying peperitic textures, together with the footwall dolerite and the syngenetic sulphides observed, all augur well for the next stages of exploration. Figure 6 presents a cross-section summarising the current interpretation.

Figure 5. Impaler ground magnetics anomalies with drill collars, hole traces and interpreted structures.

The broken ground and faulting encountered in the first two diamond holes of the programme (TRBD011 and 012) at Impaler meant that these holes did not deliver all the data we had sought.

TRBD010, 011 at Impaler and TRBD012 at Gossan were reported and discussed in the previous announcement dated 29 March 2016. A further five RC holes and two diamond holes were drilled in the second part of the programme (Figures 5, 7). The RC holes principally targeted further shallow magnetic targets delineated in the detailed ground magnetic survey carried out in 2015.

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Thundelarra Exploration

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Thundelarra est une société d’exploration minière de nickel et de cuivre basée en Australie.

Thundelarra est en développement de projets de nickel, de cuivre et de cobalt en Australie, et détient divers projets d'exploration au Canada et en Australie.

Son principal projet en développement est COPERNICUS JV en Australie et ses principaux projets en exploration sont FLEUR DE LYS, PINE CREEK REGIONAL, NGALIA, CORKSCREW, KUNDERONG PROJECT, GREGORY RANGE, KENNEDY RANGE, SPINIFEX, DOOLGUNNA NORTH-EAST, MABEL HILL, FRANK HILL PROJECT, SOPHIE DOWNS, PYRAMID PROJECT, LAMBOO, EAST KIMBERLEY, ALLAMBER, THUNDERBALL, KIMBERLEY METALS PROJECT, DAVYHURST ELA 16 / 175 et ALICE HILL en Australie.

Thundelarra est cotée en Australie et en Allemagne. Sa capitalisation boursière aujourd'hui est 4,3 millions AU$ (3,0 millions US$, 2,7 millions €).

La valeur de son action a atteint son plus haut niveau récent le 06 août 2010 à 0,95 AU$, et son plus bas niveau récent le 29 juin 2019 à 0,01 AU$.

Thundelarra possède 426 500 000 actions en circulation.

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