Rimfire Pacific Mining Limited · ASX:RIM
Rimfire Pacific Mining — Rimfire Pacific Mining NL — Investor Presentation (December 2001)
45 slides from Rimfire Pacific Mining's investor presentation, December 2001
Slide 1: Rimfire Pacific Mining NL December 2001
Rimfire Pacific Mining NL December 2001 rimfire
Slide 2: Exploration results and focus; key projects
• Rimfire’s exploration results &focus • Key projects Bingara – Diamonds Fifield – Platinum Diamonds & gold Copper / gold Zeolite Platinum rimfire
Slide 3: Exploration Approach / Philosophy
Exploration Approach / Philosophy 1. Capital Value - select areas where there is known [historical] mineralisation & apply modern ideas / techniques - define & test new geological models 2. Self Sufficiency – consider projects (eg Zeolite) which would generate a cash flow OBJECTIVE – TO ADD VALUE &
Slide 4: Bingara Diamond Project
Bingara Diamond Project rimfire
Slide 5: Diamond Exploration NSW
DIAMOND EXPLORATION NSW Rimfire’s areas 1. The cratonic vs subduction model for the formation of diamonds 2. Rimfire’s exploration program & results rimfire rimfire
Slide 6: Cratonic vs Subduction
Cratonic vs Subduction • Geothermal gradient of 4.5-5.5Gpa & 1,000oC is required for diamond to be stable, and preserved prior to being brought to the surface in rapidly rising & explosive Kimberlites and Lamproite pipes • Conventional theory predicts this can only occur at 250 to 300km in depth (ie
Slide 7: Pacific Mid Oceanic Rise, SW Pacific Subduction Zones
Pacific Mid Oceanic Rise, SW Pacific Subduction Zones
Slide 8: World Diamond Occurrences
a * — Ophiolite Derived Diamonds. . World Diamond Occurrences veonciesad damonte: not associated with Kimberlitic Rocks. + — Metamorphic terrane diamonds. vo ~fire
Slide 9: Subduction Zones
| d ¥ / \ ges Bingara-Copeton. ~ LE = Lo \ @ / 4 J ° Ophiolite Derived Diamonds. World Diamond Occurrences a Vol i -kimberliti » % * e ° ze ssecelatat diemonde: - = not associated with Kimberlitic Rocks. + Metamorphic terrane diamonds. fire
Slide 10: Cratonic regions; Subduction, back arc
Cratonic regions Subduction, back arc SUBDUCTION BOUNDARY rimfire
Slide 11: Historical Evidence of Local Diamond Source
Historical Evidence of Local diamond Source • Discovery in alluvials of ~500,000cts, ~2M diamonds • Diamonds have unique & rare colours, mineral inclusions, carbon isotopes & surface features • High proportion of diamonds contain naats [ie twinned] • Deep indentations, characteristic of crystallisat
Slide 12: Exploration to date
Exploration to date • Secured magnetic data & tenements undertaken mag-interp • Taken many tonnes of stream sediment & bulk samples • Heavy / indicator mineral concentrate sent to laboratories for detailed chemical & atomic / elemental analysis • Results evaluated, the model confirmed & exploration
Slide 13: Key Sample & Research Results
Key Sample & Research Results • First ever proof of Group 1 diamond eclogitic- facies-garnets • A 0.265ct diamond ! (first diamond not from a deep lead – Paleo channel) • Garnets & diamond are in streams draining magnetic anomalies on Rimfire tenements • Diamond inclusion dates reported in research
Slide 14: Alluvial Diamonds & Magnetics
Alluvial Diamonds & Magnetics Rimfire rimfire
Slide 15: Bingara-Copeton Alluvial Fields
Bingara-Copeton Alluvial Fields Nareena Anomaly Back Creek Tom & Jerry Anomaly rimfire
Slide 16: Sample Locations Nareena Anomaly
Sample Locations NAREENA ANOMALY rimfire
Slide 17: Interp:
mE Primary Intrusive I! Primary Intrusive III Primary Intrusive II|b Margin Intrusive Secondary Intrusive Magnetic Susceptibility (SI Interp: fire
Slide 18: Location of Key Sample Results
Location of Key Sample Results BACK CREEK The Diamond TOM & JERRY G1 diamond eclogite facies garnet G1 diamond eclogite rimfire facies garnet
Slide 19: Tom & Jerry diamond showing twin plane
Tom & Jerry diamond showing twin plane G. CATHERIN rimfire
Slide 20: Group 1 eclogite-orange garnet
Group 1 eclogite-orange garnet rimfire
Slide 21: Angular conchoidal fractures in thin section
Angular conchoidal fractures in thin section (orange almandine garnet)
Slide 22: Rimfire's orange-eclogitic garnet
Rimfire’s orange-eclogitic garnet 1.6 TiO2 wt% 1.2 MANTLE 22 wt% FeO 0.8 CRUSTAL 0.4 0.0 0 10 20 30 40 50 FeO wt%
Slide 23: Schulze Screen: a window to metamorphic grade at depth
Schulze Screen (1997) “a window to metamorphic grade at depth” RF I+II GARNET >22 wt% FeO 2 1.6 Cr-poor MEGACRYSTS MEGACRYST TiO2 wt% 1.2 0.8 0.4 DIAMOND 0.07 G1 - DIAMOND ECLOGITE ECLOGITE 0 0 0.05 0.1 0.15 ECLOGITE Na2O wt% Rimfire sample results
Slide 24: Eclogite – Garnet Significance
Eclogite – Garnet Significance ! • The presence of high sodium garnets prove the source rocks have attained the necessary pressure-temperature conditions for diamond formation [geothermal gradient] • High sodium garnets are extremely uncommon & Rimfire’s garnets show the highest sodium content in Ea
Slide 25: Hard evidence of nearby source
Hard evidence of nearby source ! • >1,000,000 diamonds discovered at Bingara- Copeton (= significant indicator train !) • Diamond discovered in Rimfire’s exploration – not from alluvial fields • The hi Na G1, eclogite-garnets proving rocks have reached the “diamond stability field” • CRA drilling at
Slide 26: The Host Rock
THE HOST ROCK Diamond Orange-eclogite garnet Clino-pyroxene P. NIXON
Slide 27: Exploration (Bingara)
EXPLORATION (Bingara) • Drill Nareena anomaly, insufficient drainage for representative samples • Review results from recent Tom & Jerry samples • Drill Tom & Jerry and Back Creek mag anomalies TOM & JERRY
Slide 28: The Fifield Platinum Project
THE FIFIELD PLATINUM PROJECT ! rimfire
Slide 29: rimfire
aus ae eTullomore a ae Fifield Peak skill sladgan \— eTrundle, PARKES. AN — oblin ° perenon)) ~ \Prorees : ORANGE OBATHURST
Slide 30: The Fifield Project
The Fifield Project • Australia’s only platinum producer from alluvial deep lead deposits • Analogous with Ural-Alaskan Type (U-AT) hosts / mines • U-AT alluvials the source of platinum before giant Bushveld & Sudbury mines • Exploration at Fifield failed to locate the source • Rimfire’s tenements a
Slide 31: Ural-Alaskan Type (target)
Ural-Alaskan Type (“target”) • Platinum mineralisation occurs in narrow, generally shoot like & concentric zones, 20- 30m across which often persist at depth • Late fluid alteration of dunite pipes, leads to concentration of platinum in the form of ferroplatinum minerals • Magnetite destroyed throug
Slide 32: rimfire
15g/t 15-30g/t >1 ounce rimfire
Slide 33: Ural-Alaskan Type Pipe / Mine South Africa
URAL-ALASKAN TYPE PIPE / MINE STH AFRICA 3 3 2 (5) 4 4 6 4 4 rimfire
Slide 34: Evidence of Local Primary Source
Evidence of Local Primary Source • The Fifield zoned intrusives (shoots) identical to Ural-Alaskan Type complexes • Worldwide these deposits occur on major crustal boundaries or sutures (e.g. The Gilmore Suture) • Mined deep leads radiate from a central area, on Rimfire’s tenements rimfire
Slide 35: The Lachlan Mineralised Zone
Gilmore Suture The Lachlan Mineralised Zone rimfire
Slide 36: A Local Example
Serpentinised dunite A Local Example rimfire
Slide 37: Magnetic low / Tout Dunite
Magnetic low / Tout Dunite rimfire
Slide 38: The Tout Dunite
a4 4 q . By) PS Oe ** 5 AS Z) Platinum Distrib ition —, se —_———— ee ee | i Laterite over Dunite High Grade Laterite ly (>10m @ 1.5% NiCo) ; Daillholes with >5 gram metres Pt . Bedrock Pt mineralisation af Intercept width @ g/t Pt
Slide 39: Exploration (Fifield)
Exploration (Fifield) • Test the 5 known U-AT intrusives within Rimfire’s tenements, represented by mag- anomalies • The shoots (within U-AT intrusives) are small, very weathered & hidden under alluvial cover • Alluvial deep leads – “path to source ?” • Ultra-hi-res magnetics searching for shoots wi
Slide 40: Pt Deep Lead
FEM I P2 Py REFERENCES 2 o® nN N oe ] Provenance region for alluvial platinum Magnesite pits NEOGENE Polaeovalley system & platinum deep leads PALAEOGENE Loterite over Dunite & Ni-Co-Pt deposits Conglomerate indurated Early DEVONIAN Gobondery Granite - fluorine rich URAL-ALASKAN TYPE COMPLEXES DEVON
Slide 41: Exploration Summary 2001/2002
Exploration Summary 2001/2002 • Bingara - drill Nareena • Bingara - drill Tom & Jerry / Back Creek (subject to new results) • Detailed magnetics Fifield & follow-up drilling • Continue investigations into feasibility of the Zeolite Project • JV Broken Hill Cu:Au rimfire
Slide 42: Corporate stats
Corporate stats: • 41.4 million shares on issue • Options: 4.8 million listed Sept 2004, 20c 8.5 million unlisted Nov 03, 12c 4.4 million variable strike, Dec 02 • Market capitalization $4 million • Cash & investments $1 million rimfire Fini
Slide 43: Gravity Anomaly Fifield
GRAVITY ANOMALY FIFIELD rimfire
Slide 44: Gilmore Suture & Fifield
Gilmore Suture & Fifield rimfire
Slide 45: Further evidence
Further evidence ! • Fifield belt is northern extent of 1,000km Gilmore Suture/Transform zone (Sil-Ord) • Large scale intra-crustal emplacement in volcanic arcs in Ordovicion, followed by diapiric injection of fractionated magma • Gravity anomalies [highs] show major underplating of ultramafic-mafic
Rimfire Pacific Mining NL — Investor Presentation (December 2001) on 6ix