Geology & Mineralization of the Blackwater Gold-Silver Deposit British Columbia, Canada

Transcription

1 Geology & Mineralization of the Blackwater Gold-Silver Deposit British Columbia, Canada MEG Short Course Precious Metal Deposits of the Northern Cordillera December 8, 2015

2 Topics Regional Setting Exploration History Deposit Geology Age Dating & Sulfur Isotopes Conclusions MEG Short Course Precious Metal Deposits of the Northern Cordillera December 8, 2015

3 Cautionary statements CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS Certain information contained in this presentation, including any information relating to New Gold s future financial or operating performance are forward looking. All statements in this presentation, other than statements of historical fact, which address events, results, outcomes or developments that New Gold expects to occur are forward-looking statements. Forwardlooking statements are statements that are not historical facts and are generally, but not always, identified by the use of forward-looking terminology such as plans, expects, is expected, budget, scheduled, targeted, estimates, forecasts, intends, anticipates, projects, potential, believes or variations of such words and phrases or statements that certain actions, events or results may, could, would, should, might or will be taken, occur or be achieved or the negative connotation of such terms. Forward-looking statements in this presentation include, among others, mineral reserve and mineral resource estimate and results of exploration activities. All forward-looking statements in this presentation are based on the opinions and estimates of management as of the date such statements are made and are subject to important risk factors and uncertainties, many of which are beyond New Gold s ability to control or predict. Certain material assumptions regarding such forward-looking statements are discussed in New Gold s annual and quarterly management s discussion and analysis ( MD&A ), its Annual Information Form and its Technical Reports filed at In addition to, and subject to, such assumptions discussed in more detail elsewhere, the forward-looking statements in this presentation are also subject to the accuracy of New Gold s current mineral reserve and resource estimates. Forward-looking statements are necessarily based on estimates and assumptions that are inherently subject to known and unknown risks, uncertainties and other factors that may cause actual results, level of activity, performance or achievements to be materially different from those expressed or implied by such forward-looking statements. Such factors include, without limitation: discrepancies between actual and estimated production, between actual and estimated reserves and resources and between actual and estimated metallurgical recoveries; actual results of current exploration or reclamation activities; uncertainties inherent to mining economic studies including the feasibility studies for Blackwater; the uncertainty with respect to prevailing market conditions necessary for a positive development decision at Blackwater. In addition, there are risks and hazards associated with the business of mineral exploration, development and mining, including environmental events and hazards, industrial accidents, unusual or unexpected formations, pressures, cave-ins, flooding and gold bullion losses (and the risk of inadequate insurance or inability to obtain insurance to cover these risks) as well as Risk Factors included in New Gold s disclosure documents filed on and available at Forward-looking statements are not guarantees of future performance, and actual results and future events could materially differ from those anticipated in such statements. All of the forwardlooking statements contained in this presentation are qualified by these cautionary statements. New Gold expressly disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, events or otherwise, except in accordance with applicable securities laws. The footnotes, endnotes and appendices to this presentation contain important information. The endnotes and appendices are found at the end of the presentation. 3

4 Blackwater Project

5 Source: New Gold 2015 Stratigraphy Ar-Ar Ma (Green Sericite w/ best Au mineralization)

6 Bedrock Geology U-Pb Ma (felsic volcanics) U-Pb 67.7 Ma (felsic sill) U-Pb 69.5 Ma (granodiorite) Sources: Diakow & Levson, 1997; New Gold km

7 Exploration history Original Ag-Zn soil anomaly : Regional Reconnaissance & Target Identification Multiple Ag-Pb-Zn stream sediment anomalies around Mt. Davidson Follow-up soil geochemical grid on north slope Mt. Davidson EM, IP-Res, Magnetics geophysical surveys 79 shallow wide-spaced reconnaissance holes totaling 6,280 meters : Exploration hiatus : Exploration resurgence Area claims re-staked and consolidated by Richfield Ventures and Silverquest Resources Systematic step-out drilling to follow anomalous gold and silver zones open to south and up slope Discovery hole BW-59: 329 metres averaging 1.25 g/t Au, 3.5 g/t Ag 99 th hole since first reconnaissance hole drilled in 1985 Total 11,250m drilled over 24 year period BW : Resource Delineation JV with Silverquest and grid drilling initiated by Richfield 2010 New Gold acquires Richfield and Silverquest Resource delineation and Feasibility Study completed 2012 Based on 1,002 holes totaling 310,000 meters P&P reserve: 8.2 Moz gold, 61 Moz silver M&I resource: 1.3 Moz gold, 9 Moz silver (exclusive of reserves)

8 Local stratigraphy Eocene Ootsa Lake andesites unconformably overlie deposit Host Sequence: Late Cretaceous Kasalka Group andesites, felsic volcaniclastics, tuffs and breccias Jurassic Bowser Lake Group mudstones, sandstones, conglomerates underlie deposit

9 Alteration Distal Potassic Hornfels: Biotite + Kspar-Pyrite + Fe chlorite-carbonate Outer Quartz-spessartine garnet + actinolite NH4 bearing illite + Buddingtonite (rare) Ore Zone: Silica (recrystallized) Sericite (muscovite)

10 Mineralization Early stage: Pyrrhotite + Arsenopyrite + spessartine garnet Main stage: Pyrite-sphalerite + chalcopyrite-galena; dendritic black sulfide DBS Native gold, electrum, kustellite (Au-Hg alloy) Silver as argentite, electrum Late stage: Arsenopyrite, marcasite, galena

11 Deposit plan view

12 N-S section view

13 E-W section view

14 Age Dating Felsic Host BW Intrusive Suite Ar-Ar Ma (Green Sericite w/ best Au mineralization) Sources: MDRU - Looby & Hart, 2013; New Gold ; Friedman et al, 2001

15 Sulfur Isotopes Source: Looby, Gregory and Hart, 2013

16 Deposit Type (?) Lack of added silica and quartz veins Lack of boiling textures Presence of low, intermediate, and high-sulphidation mineral assemblages Looby, 2015

17 Deposit Type (?) Lack of added silica and quartz veins Lack of boiling textures Presence of low, intermediate, and high-sulphidation mineral assemblages Alteration dominated by high-crystalline illite and muscovite, feldspar-stable (near-neutral) modified from Leach

18 Deposit Type (?) Lack of added silica and quartz veins Lack of boiling textures Presence of low, intermediate, and high-sulphidation mineral assemblages Alteration dominated by high-crystalline illite and muscovite, feldspar-stable (near-neutral) Link to porphyry deposit inconclusive

19 Deposit Type (?) Blackwater South Key Sources: Diakow & Levson, 1997; New Gold km

20 Blackwater Intrusive Suite Late Cretaceous granodiorite to monzogranite phases have calc-alkaline affinity Peraluminous I-Type Blackwater Hornblende-Granodiorite Strongly Oxidized

21 Conclusions Blackwater mineral paragenesis spans from low- to high-sulphidation states with reduced to oxidized conditions Early Po + Asp mineralization: low-sulphidation, low oxidation state Main Stage Py ± Cp (Au, Ag) mineralization: intermediate to high-sulphidation An I-type magma at depth may have produced fluids that were reduced upon rising while interacting with hydrocarbons derived from basement carbonaceous sedimentary rocks Age dating, sulfur isotopes, and whole rock geochemistry indicate extensive Late Cretaceous to early Paleocene hydrothermal activity and a close link between precious & base metal mineralization and igneous activity in the region Blackwater does not easily fit into a conventional epithermal deposit classification (intermediate sulphidation epithermal?) Blackwater is best described as a hydrothermal deposit formed at relatively shallow depth in a structurally-prepared section of volcanic stratigraphy with enhanced permeability seds seds

22 Conclusions Blackwater represents an emerging new gold district in an under-explored part of British Columbia

23 Acknowledgements New Gold Blackwater Exploration & Development Teams MDRU E. Looby, C. Hart Noel White John Proffett Overburden Drilling Management Heberlein Geoconsulting K Heberlein Living Sky Geophysics C Ludwig Quantec Geophysics GeoSim Consulting SRK Consulting (Canada)

24 Mineral Reserve & Resource Statement Blackwater Mineral Reserve & Resource Estimate March 10, Reserves Direct processing 3 Category Tonnes & Grade 2 Contained Metal Tonnes (000s) Gold g/t Silver g/t Gold Koz Silver Koz Proven 124, ,790 22,100 Probable 169, ,730 22,300 P&P (dir. proc.) 294, ,520 44,400 Stockpile material 4 P&P Proven 20, ,300 Probable 30, ,100 P&P (stockpile) 50, ,400 Proven 144, ,115 24,400 Probable 199, ,055 36,400 Total P&P 344, ,170 60,800 Measured & Indicated (Exclusive of Reserves) Direct processing 3 Measured Indicated 36, ,385 M&I (dir. proc.) 36, ,011 5,448 Stockpile material 4 Measured Indicated 12, ,587 M&I (stockpile) 12, ,587 Total M&I 49, ,136 7,035 Inferred Inferred (dir. proc.) 8, ,003 Inferred (stockpile) 1, Total Inferred 10, ,203 Capoose Indicated 16, ,233 Inferred 19, ,670 Notes: 1. Mineral Reserve estimate effective as of December 31, 2014; and, Mineral Resource estimate effective as of March 10, Mineral Reserves reported based on $1,200/oz gold and $18.00/oz silver; Mineral Resources reported within a conceptual open pit shell based on $1,300/oz gold and $20.00/oz silver.

25 Appendix Reserves and resources notes 1) New Gold reports its Measured and Indicated Mineral Resources exclusive of Mineral Reserves. Measured and Indicated Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. Inferred Mineral Resources have a greater amount of uncertainty as to their existence, economic and legal feasibility, do not have demonstrated economic viability, and are likewise exclusive of Mineral Reserves. 2) Mineral Resources are classified as Measured, Indicated and Inferred and are reported based on technical and economic parameters consistent with the methods most suitable for their potential commercial exploitation. Where different mining and/or processing methods might be applied to different portions of a Mineral Resource, the designators open pit and underground have been applied to indicate envisioned mining method. Likewise the designators oxide, non-oxide and sulphide have been applied to indicate the type of mineralization as it relates to appropriate mineral processing method and expected payable metal recoveries. Mineral Reserves and Mineral Resources may be materially affected by environmental, permitting, legal, title, taxation, sociopolitical, marketing and other risks and relevant issues. Additional details regarding Mineral Reserve and Mineral Resource estimation, classification, reporting parameters, key assumptions and associated risks for each of New Gold s material properties are provided in the respective NI Technical Reports which are available at 3) The Mineral Resource estimates for the Blackwater Project are effective March 10, 2015 and the Mineral Reserve estimates are effective December 31, ) Stockpile material is defined as mineralisation above 0.32 g/t AuEq for Reserves and between a 0.30 g/t AuEq and a 0.40 g/t AuEq for a cut-off that is suitable for stockpiling and future processing. 25

26 Appendix Endnotes CAUTIONARY NOTE TO U.S. READERS CONCERNING ESTIMATES OF MINERAL RESERVES AND MINERAL RESOURCES Information concerning the properties and operations of New Gold has been prepared in accordance with Canadian standards under applicable Canadian securities laws, and may not be comparable to similar information for United States companies. The terms Mineral Resource, Measured Mineral Resource, Indicated Mineral Resource and Inferred Mineral Resource used in this presentation are Canadian mining terms as defined in the Canadian Institute of Mining, Metallurgy and Petroleum ( CIM ) Definition Standards for Mineral Resources and Mineral Reserves adopted by CIM Council on May 10, 2014 and incorporated by reference in National Instrument ( NI ). While the terms Mineral Resource, Measured Mineral Resource, Indicated Mineral Resource and Inferred Mineral Resource are recognized and required by Canadian securities regulations, they are not defined terms under standards of the United States Securities and Exchange Commission. As such, certain information contained in this presentation concerning descriptions of mineralization and resources under Canadian standards is not comparable to similar information made public by United States companies subject to the reporting and disclosure requirements of the United States Securities and Exchange Commission. TECHNICAL INFORMATION The scientific and technical information in this presentation has been reviewed and approved by Mark A. Petersen, Vice President, Exploration of New Gold. Mr. Petersen is an AIPG Certified Professional Geologist and a Qualified Person under National Instrument