GCM Corp., Ltd. · ASX:GCM
GCM — Toptung — Technical Presentation (August 2015)
43 slides from GCM's technical presentation, August 2015
Slide 1: The Torrington Project
TOPTUNG LIMITED ABN 12 118 788 846 THE TORRINGTON PROJECT Tungsten exploration – a new approach; Light Detection And Ranging (LiDAR) & Deep Ground Penetrating Radar (DGPR) Armidale NSW August 2015 Mike Skinner
Slide 2: Torrington Project Location
Torrington Project Location Approximately 350km SW of the Port of Brisbane 2
Slide 3: Torrington Geology
Torrington Geology The Torrington Project lies within the Late Permian Mole Granite and covers the Torrington Pendant, an elliptical body of Carboniferous- Early Permian metasediments which is the remnant roof of the Mole Granite.
Slide 4: What is Silexite??
What is Silexite?? The primary ore is silexite (called locally a quartz/topaz greisen), a topaz bearing (>5%, typically 5-30%) quartz rich rock, and at Torrington + wolfram and bismuth Silexite genesis is somewhat complex with two silexite types being evidenced in the field Intrusive type with a sac
Slide 5: Torrington Pendant >300 Mineral Occurrences
Torrington Pendant >300 Mineral Occurrences More than 60 silexite occurrences known to date within the Torrington Project 5
Slide 6: Torrington Historic Overview
Torrington Historic Overview • Historical, successful multi-element mining (tungsten, bismuth and topaz) • Contained largest single wolfram mass (12.5t) recorded in Australia from a 35 ton vug History of wolfram • >100 years mining activity within the area, including BHP • Pacific Copper tungsten an
Slide 7: Torrington Historic Mining
Torrington Historic Mining Torrington Wolfram Proprietary’s Krupp ball mill & concentration plant circa 1911 Rockvale Wolfram Company tramway Hawkins quarry, Torrington circa 1911 Rockvale Wolfram Company’s battery & concentration plant circa 1911
Slide 8: Torrington Historic Workings
Torrington Historic Workings Historic Workings Typical Silexite Body (Mt Everard) – Mined 1979-81 Wild Kate Deposit
Slide 9: Torrington Historic Workings
Torrington Historic Workings Numerous small scale operations
Slide 10: Tungsten – Unique properties, difficult to replace
TUNGSTEN – Unique properties, difficult to replace Very Hard: Strongest of all metals - three times harder than chrome and titanium Very Dense: Greater density than lead or uranium Very Heat Resistant: 3400°C highest of all metals Environmentally Friendly: Very resistant to corrosion & completely no
Slide 11: Tungsten – Critical World Supply
TUNGSTEN – Critical World Supply Tungsten and its place in the list of critical raw materials
Slide 12: Bismuth – A mineral that is defining our future
BISMUTH – A mineral that is defining our future High Electrical Resistance: Has highest Hall effect of any metal (greatest increase in electrical resistance when placed in a magnetic field) Low Conductivity: Lower than any metal except mercury Environmentally Friendly: Non-toxic and increasingly use
Slide 13: Topaz – A superior refractory Mullite
TOPAZ – A superior refractory Mullite Topaz (Al2SiO4(F,OH)2 can be converted to mullite – an important aluminosilicate ceramic also known as porcelainite (3Al2O3SiO2) • Very high Al2O3/SiO2 ratio in sintered product = 7/3 vs conventional Al2O3/SiO2 of 3/2 • A higher refractory temperature of 1880oc
Slide 14: Torrington Topaz – CSIRO Pyrometric Cone Test
Torrington Topaz – CSIRO Pyrometric Cone Test Torrington mullite, a superior product CSIRO Refractory Test: Performed to Australian standard for pyrometric cone test Left to right: Orton Reference Cone 39 (1865 degrees c), Torrington Mullite, a Japanese sintered mullite, an English mullite and a Ger
Slide 15: Torrington Silexite Deposit Map 1981
Torrington Silexite Deposit Map 1981 Good detail, but only in specific areas and on a local grid only
Slide 16: Torrington Silexite Deposit Map 1995
Torrington Silexite Deposit Map 1995 Good detail, on a universal coordinate system (but only in specific areas) and issues exist with the surveying the boundaries of the existing tenements
Slide 17: Torrington Map (Google, NSW Globe)
Torrington Map (Google, NSW Globe) Excellent detail on infrastructure and regional structure with a universal coordinate system but no ground detail due to tree cover.
Slide 18: Light Detection And Ranging (LiDAR) Survey
Light Detection And Ranging (LiDAR) Survey The LiDAR survey was flown on the 12th and 15th March 2015 comprising 15 parallel runs in an east-west direction spaced at 500m intervals at an altitude of approximately 1,000m above ground level. The total survey area was approximately 53km2. The LiDAR sys
Slide 19: LiDAR Survey (DTM Model)
LiDAR Survey (DTM Model)
Slide 20: Torrington Bathymetric Survey
Torrington Bathymetric Survey Bathymetry was acquired during early May 2015 with handheld bathymetric sounding equipment. Data points were acquired at a density of approximately 1 point per 4 square metre, which, in conjunction with previous pit cross sections, allowed contoured surfaces for the pit
Slide 21: LiDAR Survey False Colour Elevation
LiDAR Survey False Colour Elevation Detail historic tramway to workings Detail historic alluvial workings
Slide 22: LiDAR Image With Silexite Bodies
LiDAR Image With Silexite Bodies
Slide 23: Example 1: Burnt Hut Deposit Map ~ 1981
Example 1: Burnt Hut Deposit Map ~ 1981
Slide 24: Burnt Hut Satellite Image
Burnt Hut Satellite Image (Google, NSW Globe)
Slide 25: Burnt Hut LiDAR Detail
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Slide 26: Example 2: D Bodies Deposit Map ~ 1982
Example 2: D Bodies Deposit Map ~ 1982
Slide 27: D Bodies Satellite Image
D Bodies Satellite Image (Google, NSW Globe)
Slide 28: D Bodies LiDAR Detail
D Bodies LiDAR Detail
Slide 29: Example 3: Wild Kate Deposit Map ~ 1981
Example 3: Wild Kate Deposit Map ~ 1981
Slide 30: Wild Kate Satellite Image
Wild Kate Satellite Image (Google, NSW Globe)
Slide 31: Wild Kate LiDAR Detail
1,065 m 1,060 m 1,045m 1,040m Wild Kate LiDAR Detail
Slide 32: Wild Kate 3D Cross Section
Wild Kate 3D Cross Section LEGEND Buttors Road +85 Primary Exploration Target Boundary Costean @ Buk Semples Core Holes @ Chen Holes DRILLING LITHOLOGY Stexto [EE H4x00 sitoxternon- stents Th Non- Siexite JORG RESOURCES 4 GEOLOGY JORC indicated Siento Endowment JORG inferred Silexite Endowment Metas
Slide 33: Torrington Resources Update (JORC 2012)
Torrington Resources Update (JORC 2012) Original JORC Resource Estimates* Orebody Classification Silexite (t) Grade (%) W Tungsten (t) Indicated 192,000 0.17 330 Wild Kate Inferred 770,000 0.14 1,100 Total 962,000 1,430 New JORC Indicated Resource Estimates* Orebody Silexite (t) >0.05 % W (1) Grade
Slide 34: Deep Ground Penetrating Radar (DGPR)
Deep Ground Penetrating Radar (DGPR) • New Ground Penetrating RADAR (GPR) that can image to several hundred meters depth through a wide range of geological terrain • Operating principle is based on the transmission of super broadband electromagnetic pulses without spreading to the target(s) and regi
Slide 35: Deep Ground Penetrating Radar (DGPR) Specifications
Deep Ground Penetrating Radar (DGPR) Specifications • Mean radiated power, 50 mW • Peak pulse voltage, >5.5 kV • Pulse duration, 3-5 ns • Repetition rate, 1000 Hz • Radar potential, 120 dB • Sensitivity, 200 μV • Discretisation rate, 1000/500MHz • Frequency band, 1-50+ MHz • Dynamic range, >95 dB •
Slide 36: Deep Ground Penetrating Radar (DGPR)
Deep Ground Penetrating Radar (DGPR) DPGR typical survey layout
Slide 37: Deep Ground Penetrating Radar (DGPR)
Deep Ground Penetrating Radar (DGPR) On the 18th/19th June, 2015, a 2 day trial acquisition of DGPR was conducted as part of an exclusive 3 week trial of the DGPR technology in Australia. Detail DGPR ground traces Burnt Hut Wild Kate Historic Tailings Mt Everard
Slide 38: Wild Kate DGPR
Wild Kate DGPR The scope of the survey and follow up interpretation was to assess the ability for the DGPR system to successfully image key lithological changes at Torrington. The potential to be able to accurately image the granite basement material would be a useful exploration tool. Silexite (red
Slide 39: How the DGPR trial compared to existing model?
Wild Kate DGPR How the DGPR trial compared to existing model? Modelled Silexite Body
Slide 40: Wild Kate DGPR
Wild Kate DGPR The central mottled area is where we dragged the gear over the exposed outcrop, resulting in a different sort of response. This may be due to air gaps over the exposed outcrop Mottled Area
Slide 41: Wild Kate DGPR
Wild Kate DGPR Again the red patches (below the blue) are broadly correlative to the modelled orebodies but show that the models need refining after further drilling and correlation to DGPR. The DGPR does seem to illustrate a silling emplacement which reflects our assumptions and those of previous w
Slide 42: Competent Persons Statement
Competent Persons Statement I, Gordon Saul, confirm that I am the Competent Person for the Report and: • I have read and understood the requirements of the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code, 2012 Edition). • I am
Slide 43: Thank You – Questions?
THANK YOU QUESTIONS?