Gemfields Group Limited · JSE:GML
Gemfields — Technical Presentation (April 2014)
21 slides from Gemfields's technical presentation, Apr 14, 2014
Slide 1: A warm welcome to the delegation from London
A warm welcome to the delegation from London 0
Slide 2: MRM — Location & Accessibility
MRM — Location & Accessibility The world’s single largest coloured gemstone producer
Slide 3: Mine, Wash Plant, Mine Camp
Mine Wash Plant Mine Camp The world’s single largest coloured gemstone producer
Slide 4: Timeline of Key Events
Timeline of Key Events Montepuez Ruby Mining LDA (‘MRM’) — 75% owned by Gemfields PlC • 03rd Jun 2011: JV agreement signed between Gemfields plc and Mwiriti Lda • 30th Aug 2011: Montepuez Ruby Mining Lda (MRM) comes into existence • 24th Feb 2012: The mining licenses 4702 and 4703 issued in the name
Slide 5: The first heavy mining machinery arrived on site in April 2012
The first heavy mining machinery arrived on site in April 2012. The total fleet as now consisted of: • CAT 330D excavator x 4 • CAT 725 ADT x 11 • TATA 2523 tipper x 3 • CAT D7R dozer x 1 • CAT 950H wheel loader x 1 • CAT 428E back hoe loader x 1 • CAT 140H motor grader x 1 • Volvo diesel bowser • M
Slide 6: MRM — Geology Explained
MRM — Geology Explained Rubies are hosted by eluvial/colluvial/alluvial material and in the underlying amphibolitic bedrock. MRM The Montepuez Complex comprises of rocks, ranging from granitic to amphibolitic in composition, with quartzites and marble at places. The rocks of the Montepuez Complex ar
Slide 7: Ruby Formation Explained
Ruby Formation Explained The world’s single largest coloured gemstone producer
Slide 8: Primary & Secondary Ruby Mineralisation
Primary Ruby Deposits Primary & Secondary Ruby Mineralisation Secondary Ruby Deposits Granite/Gneisses Litho - I Litho - II Litho - III Amphibolites & Gneisses River channels Unlike many other rocks, rubies and Quaternary Fluvial plain Lake sapphires can only form under a limited Range of high press
Slide 9: Ruby Exploration Methods
Ruby Exploration Methods 500000 520000 540000 560000 580000 600000 8620000 8620000 8600 000 8600 000 GEOLOGICAL METHOD TYPICAL ASSOCIATION WITH 8580 000 8580 000 CERTAIN ROCKS OR MINERALS 8560 000 8560 000 GEOPHYSICAL METHOD 8540 000 8540 000 MAGNETIC SUCEPTIBILITY, SPECIFIC GRAVITY, CONDUCTIVITY, R
Slide 10: MRM — Bulk Sampling
MRM — Bulk Sampling • Bulk sampling began in August 2012 • To the end of Feb 2014 total rock handling is 960,000 tonnes • Bulk sampling is presently taken place within 2 main networks – the Core Sector and Mugloto. Within each network are a series of pits, most notably the Maninge Nice and Mugloto P
Slide 11: Maninge Nice Bulk Sampling
Maninge Nice Bulk Sampling Top Soil Amphibolite Feldspathic Vein Ruby mineralisation Old working Top Soil Gravel Bed Basement Gneiss weathered rock The world’s single largest coloured gemstone producer
Slide 12: Bulk Sampling
Total Rock Ore Mined Ore Washed Gem Production Ore Grade Stripping Pit Handling Primary Secondary Primary Secondary Primary Secondary Primary Secondary Ratio T T T T T ct ct ct/T ct/T Maninge Nice 600,282 89,669 110,660 14,526 49,081 2,324,046 4,878,732 160 99 2.00 Central 24,589 4,134 2,563 2,585 6
Slide 13: Wash Plant
Wash Plant Initial 50 TPH pilot wash plant has been augmented to a 100 TPH realistic and more efficient capacity since its arrival in Nov 2012 with further additions of dry screen, logwasher and jigs The world’s single largest coloured gemstone producer
Slide 14: Wash Plant Flow Sheet
13 Wash Plant Flow Sheet -3mm, +75µm TPH wt% 16 18 Crusher Head Feed -3mm -3mm BC-2 Chieftain Dry Screen (I.C.E.) TPH wt% TPH wt% 150 100 TPH wt% 48 32 Dewatering screen Tailings 150 100 (Pilot Crushtec) TPH wt% 22 32 Chute -3mm 50P Jig (OVM) 50S Jig (OVM) -70, +3mm -25, +3mm Logwasher (Terex) BC-1
Slide 15: Sort House
Sort House MRM have formulated the world’s first grading system for Montepuez rubies in the rough. The world’s single largest coloured gemstone producer
Slide 16: Sort House
Sort House The world’s single largest coloured gemstone producer
Slide 17: Namanhumbir Housing & Office Complex
Namanhumbir Housing & Office Complex The world’s single largest coloured gemstone producer
Slide 18: Work Plan – Phase I
Work Plan – Phase I Activity Time line Status Realistic time Line Arrival of mining equipment: Apr 2012 –Arrived on 3rd Commissioned April Approach roads, ground preparation etc.: Apr-Jun 2012 On going On going Camp erection in Namanhumbir: May-Nov 2012 Completed – April 2014 landscaping in progress
Slide 19: Presidential Visit – April 2014
Presidential Visit – April 2014 The world’s single largest coloured gemstone producer
Slide 20: Corporate Social Responsibility
Corporate Social Responsibility The world’s single largest coloured gemstone producer
Slide 21: Thank you
Thank you The world’s single largest coloured gemstone producer
Gemfields Group — Technical Presentation (April 2014) on 6ix