Dargues Gold Mine and exploration in the Orbit of the Portal

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Dargues Gold Mine and exploration in the Orbit of the Portal SMEDG May 30 th 2019 Angela Lorrigan

Transcript of Dargues Gold Mine and exploration in the Orbit of the Portal

Page 1: Dargues Gold Mine and exploration in the Orbit of the Portal

Dargues Gold Mine and exploration in the Orbit of the PortalSMEDG May 30th 2019

Angela Lorrigan

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Dargues Gold Mine – Project overview

• Diversified Minerals Pty Limited (“DML”) acquired the Dargues Gold Project in 2016.

• DML is developing an underground mine to to produce a gold-rich sulphideconcentrate.

• Development of the decline is well-advanced.

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This is what it looks like

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Dargues Gold Mine – down down

• More than 650m laterally from the portal

• 80 below surface

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1.45 sq km = total mine site areaincluding the tailings dam

1.6 sq km = area of housing developmentin one suburb of one town on

the South Coast

..and…just in case you thought we were making a terrible mess of NSW

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Geology

Braidwood Granodiorite

Lower Devonian circa 410 Ma

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Geology

E

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Photograph from Forster, Downes, Blevin and Phillips (2014)

Photography by Dave Forster

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Resource & Reserve

Measured Indicated Inferred Total (2g/t cut off)

KtAu

(g/t)Au

(koz)Kt

Au (g/t)

Au (koz)

KtAu

(g/t)Au

(koz)Kt

Au (g/t)

Au (koz)

560 3.6 113 740 7.4 175 290 6.5 60 1,590 6.8 348

Proven ReserveProbable Reserve Total

KtAu

(g/t)Au

(koz)Kt

Au (g/t)

Au (koz)

KtAu

(g/t)Au

(koz)

503 5.0 81 638 6.2 127 1,140 5.7 208

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Annual scheduleProject years

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Who needs cyanide?

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Goal: To find more Resource and not break the budget

Existing data• Magnetics• ASTER• Soil samples• IP• Drill holes

Data from mining • Structural model

• Alteration mapping

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Magnetics

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ASTER

Dargues

Chloritic (chlorite/carbonate/amphibole).

Sericitic (illite/muscovite/smectite + chlorite/carbonate);

Pyrophyllitic (pyrophyllite/alunite+chlorite)

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IP

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Drilling data

For regional targets what is the best indicator of another Dargues?

Are there any metal or alteration trends within Dargues

to help us find extensions?

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Extensions – long section distributions

Au As

Bi Cu

Gridded data IDW3

Gold probably the best guide for this purpose.

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Extensions

Au

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Regional

Au As

Bi Cu

Gridded data IDW3

Best overall correlationwith Au is Cu.

Bi is a strong, coherentanomaly (>8 ppm)

Bi “tighter” around themain orebody.

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Bi and Cu on IP

Bi > 8 Cu > 60

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Further knowledge to be gained through mining

Results from DD drilling

and mapping underground

will help us build a better

picture of the controls on

mineralisation.

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Conclusions

• There are a lot of targets to be had in re-visiting old data.

• Be wary of drawing conclusions from patterns that are an artefact of sample distribution.

• Within the Resource gold is the best indicator to more gold.

• Bi at > 8 ppm forms a useful halo around Dargues and should be applied in the wider area.

• What we learn from venturing into the new mine will help to guide future exploration.

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Thank You

Thankyou to: Diversified Minerals

Dr Drazen Vukovic

Ben Chandler

Greg Cozens

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