straits hillgrove gold
TRANSCRIPT
STRAITS HILLGROVE GOLD
Hillgrove: A New Start
20th September 2007
Chris Simpson – Senior Exploration Geologist
• Regional Geology
• Hillgrove Demonstration Process Plant
• Tailings Storage Facility Two (TSF2)
• Bakers Creek Haul Road
• Pre-Mine Development Syndicate
• Exploration Drilling
• Infrastructure Upgrades
Hillgrove
Site Overview
Hillgrove – Overview
Location
HillgroveMineral Exploration Tenements
Overview
• Challenging terrain – 450m deep
gorge adjacent the mine site
• Straits Resources purchased 100%
of Hillgrove in March 2004
• Exploration plus ongoing care and
maintenance activities to July 2006.
• Pre mine development from August
2006
Hillgrove – Overview
History
Overview - Historical
Mining since the 1880’s
Regional Geology
Hillgrove
Regional Geology
• Late Carboniferous Girrakool Sediments – Turbiditic shales and cherts
• Intruded by Early Permian Granites –Hillgrove Adamellite / Bakers Creek Diorite
• Tension gash corridor bounded by two regional ENE fault zones
• Lamprophyre dykes are common – Mid Carboniferous in age
• Multi phase Au – Sb – W mineralisation
• Shear hosted
• Strong Au – As association
Geology
• 200+ lodes identified within the field
• Extensive workings on many of the lode systems
• Investigated 15 lode systems to date
• Resource currently at 1.44 M ounce gold equivalent as at 31st December 2006
Typical X-Section – Hillgrove Lodes
Geology
Hillgrove Demonstration Process Plant
Hillgrove
Hillgrove Demonstration Plant
The Process
•Comminution. SAG mill circuit producing a coarse product for concentration
•Concentration. Conventional Flash Flotation followed by rougher flotation at a coarse grind to generate a bulk mineral concentrate. Gravity concentration of bulk concentrate to produce gravity gold concentrate.
Hillgrove Demonstration Plant
The Process
•Antimony Leach. Alkaline / sulphide leach to selectively dissolve antimony from Stibnite
•Antimony EW processDirect electro-winning of Sb from leach solutionCrystalline deposit easily removed from plates for melting on site
3 (Na2S ) + Sb2S3 2 Na3SbS3
Laboratory Antimony Cathode
Hillgrove Demonstration Plant
The Process
•Tungsten recovery. Gravity recovery of Scheelite mineral from circuit tailings
Hillgrove Demonstration Plant
The Process
•Metal casting Facility. Electric furnace melting and automatic casting facility
Hillgrove – OverviewPlant Construction - Pictures
30th April
SAG Mill
Hillgrove – OverviewPlant Construction - Pictures
Au Room
Sb Smelting
E/W
Process Water
Hillgrove
Hillgrove
Tailings Storage Facility Two (TSF2)
Hillgrove
Hillgrove
TSF2 Construction – September 2007
Bakers Creek Haul Road
Hillgrove
Mining
• Internal access road and creek crossing completed
Hillgrove
Mining
• Bakers Creek crossing completed
Hillgrove
Mining
Pre-mine Development - Syndicate
Hillgrove
• Development has commenced in 1740 and 1650 Levels.
Hillgrove
Mining
• Preparation for stoping underway.
Hillgrove
Mining
Exploration drilling
Hillgrove
Syndicate
Syndicate
Black Lode
Syndicate
•Most consistent lode to recommence mining operations•Average width 2m•Strong Au – Sb – W mineralisation•Block model – 500m strike length•Excellent potential for additional resources along strike / depth•Exploration for parallel lode systems
Eleanora / Garibaldi
Eleanora / Garibaldi
Eleanora / Garibaldi
Quartz Breccia – ELG076
Lower Cooney Tunnel
6615200N
3946
00E
6615000N
6614800N
6614600N
6614400N
6614200N
3948
00E
3950
00E
3952
00E
3954
00E
3956
00E
3958
00E
3960
00E
3962
00E
Legend UG DevelopmentMineralised TrendRoadExisting HolePlanned HoleCurrent HoleCompleted Hole
BRK001
BRK002
BRK003
BRK016
BRK005
BRK006
BRK007
BRK008
BRK004
BRK011
Brackins Spur Drilling YTD07
EXPLORATION
HILLGROVE DEPOSITS
Clarks Gully
Wide-spaced deeper drilling
HILLGROVE FAULT
?
? OFFSET?
• Preliminary resource of
413,757t @ 15.1g/t Au Eq
2000RL
1900RL
1800RL
1700RL
6620
800N
6621
000N
6621
200N
Hillview Prospect
Clarks Gully Open Pit
Old Hillgrove Road
Waterfall Way
B.O.W.
<5>5 <10>10 <20>20Planned Hole
LegendDownhole Gram Metres
(Au eq. ppm)
6620
600N
Clarks GullySb core with enveloping Au - Proposed Drilling 2007/2008
Regional Exploration
Hillgrove
Regional Exploration 2007/2008
• Helicopter borne magnetometer survey completed Dec 2006
• Literature review and digital capture of regional exploration data completed,
including geological mapping, soils, streams and drilling
• Many untested targets with either no work, or incomplete work eg soil sampling
with no gold assay
• Large scale stream sediment/soil sampling, mapping and drilling of targets will
occur during 2007/2008
• Steady climb in annual drill metres
Year Diamond Percussion Total
2004 2,113 5,178 7,291
2005 5,225 8,326 13,551
2006 10,287 - 10,287
2007 16,865 - 16,865
47,994
HillgroveHelimag Survey
TMI with sun angle from east
Upgrade & Refurbishment of Site Infrastructure
Hillgrove
Hillgrove
Hillgrove
Hillgrove
Hillgrove
Hillgrove
Hillgrove
Thank you
Hillgrove