Feasibility Study and Technical Report - Pretivm

More documents

Recommendations

Info

to form a series of seemingly stratigraphy-parallel pods within the steeply-dippingpolylithic conglomerate, and immediately overlying fragmental volcanic rocks in the coreof the syncline. These pods appear to be spatially associated with intensely silicifiedzones that appear to have acted as pressure seals, which generated local overpressureconditions and subsequent depressurization by hydraulic and/or tectonic brecciation.While there is some indication of a hard boundary between the polylithic conglomerate,and underlying fine-grained volcano-sedimentary and porphyritic latite flow volcanic rocks(previously termed "Jurassic" and "Triassic", respectively) in places, the mineralizationcrosses this contact. Gold and silver mineralization statistics for the volcanic andvolcano-sedimentary rock units present in VOK are very similar, suggesting (along withvisual assessment) that they can be treated as part of the same population forestimation. The boundary between the mineralized domains in the polylithicconglomerate and underlying volcano-sedimentary and porphyritic flow volcanic rocks is ahard contact in places due to the unconformity on the boundary with a generally weaklymineralizedsiliceous unit along most of the contact. There are places where thissiliceous unit does not exist and the boundary is gradational, with the sub-verticalmineralized corridors crossing the contact (Figure 14.2). In these places a soft boundaryapproach was used for grade estimation.Recent geological interpretation has shown that the area previously covered by GalenaHill is actually an extension of VOK, and this area has now been incorporated into VOK.14.5.2 WEST ZONEWest Zone was interpreted for the April 2012 estimate using a nominal 0.3 g/t Au cut-offgrade (Olssen and Jones, 2012a). There are no high-grade corridors defined at WestZone.14.5.3 DOMAINS USED FOR MODELLINGAfter review of the grade distributions for the mineralized corridors and different rocktypes at VOK, Snowden chose to evaluate/model each mineralized corridor using hardboundaries, but combining the various lithologies within the mineralized corridor. Therewere some exceptions where the corridors were interpreted to cross the lithologicalboundaries, and these contacts were treated as soft.The surrounding low-grade (background) domain was estimated as a single domain usingsoft boundaries, but excluding the high-grade population from within the high-gradedomains.The mineralized corridors within VOK change orientation locally. This was addressed byusing a series of "search domains" with locally adjusted orientations applied forestimation. The boundaries between these search domains were treated as soft forestimation.West Zone was estimated using a single mineralized domain.Pretium Resources Inc. 14-4 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC
Figure 14.2Cross-section Showing Lithological Interpretation and Mineralized DomainInterpretation at VOKFigure 14.3Orthogonal View of Mineralized High-grade Domain InterpretationNorthWest ZoneGossan HillVOKShore ZoneBridge Zone~250 mPretium Resources Inc. 14-5 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC
Page 1 and 2:
Report to:Pretium Resources Inc.Fea
Page 3 and 4:
TABLE OF CONTENTS1.0 SUMMARY ......
Page 5 and 6:
12.2 DATA VERIFICATION BY SNOWDEN .
Page 7 and 8:
16.7 MOBILE EQUIPMENT REQUIREMENTS
Page 9 and 10:
20.1 SUSTAINABILITY AND ENVIRONMENT
Page 11 and 12:
26.4.2 HYDROGEOLOGICAL RECOMMENDATI
Page 13 and 14:
Table 13.23 Occurrences of Gold in
Page 15 and 16:
LIST OF FIGURESFigure 1.1 Simplifie
Page 17 and 18:
Figure 16.11 Extent of Mine Develop
Page 19 and 20:
hertz .............................
Page 21 and 22:
atomic emission spectroscopy ......
Page 23 and 24:
Mineable Shape Optimizer ..........
Page 25 and 26:
VOK Domain 2 ......................
Page 27 and 28:
1.2 PROPERTY DESCRIPTION AND LOCATI
Page 29 and 30:
1.4 MINERAL RESOURCE ESTIMATESSnowd
Page 31 and 32:
Table 1.2West Zone Mineral Resource
Page 33 and 34:
Figure 1.1Simplified Process Flowsh
Page 35 and 36:
1.7 MINING METHODSThe underground m
Page 37 and 38:
Figure 1.2Overall Site LayoutE 4300
Page 39 and 40:
Figure 1.4Knipple Transfer Station
Page 41 and 42:
outflow. This approachdischarge thr
Page 43 and 44:
summary of the overall operating co
Page 45 and 46:
The Project schedule identifies the
Page 47 and 48:
2.1 QUALIFIED PERSONSThe qualified
Page 49 and 50:
Report Section Company QP23.0 Adjac
Page 51 and 52:
4.0 PROPERTY DESCRIPTION AND LOCATI
Page 53 and 54:
4.3 STATUS OF MINING TITLESThe Prop
Page 55 and 56:
Figure 4.3Pretivm Mineral ClaimsSou
Page 57 and 58:
5.0 ACCESSIBILITY, CLIMATE, LOCALRE
Page 59 and 60:
5.2 CLIMATE AND PHYSIOGRAPHYThe cli
Page 61 and 62:
6.0 HISTORYInformation in this sect
Page 63 and 64:
Figure 6.1West Zone Underground Vei
Page 65 and 66:
6.1 WORK COMPLETED BY SILVER STANDA
Page 67 and 68:
7.0 GEOLOGICAL SETTING ANDMINERALIZ
Page 69 and 70:
Figure 7.1Tectonic Setting of the B
Page 71 and 72:
7.2 LOCAL GEOLOGY - SULPHURETS MINI
Page 73 and 74:
Altered Stuhini Group rocks and Mit
Page 75 and 76:
Figure 7.4Sulphurets Mining Camp Ge
Page 77 and 78:
y the Brucejack Fault as well as by
Page 79 and 80:
Previously, some of the rocks strad
Page 81 and 82:
Figure 7.6Brucejack Property Geolog
Page 83 and 84:
Figure 7.6 (con’t)Brucejack Prope
Page 85 and 86:
more distal (i.e. down temperature)
Page 87 and 88:
more heavily altered than those abo
Page 89 and 90:
Figure 7.8Brucejack Property Minera
Page 91 and 92:
Figure 7.10South-north Cross-sectio
Page 93 and 94:
WEST ZONEThe West Zone gold-silver
Page 95 and 96:
Figure 7.12VOK to West Zone Geologi
Page 97 and 98:
Figure 7.14West Zone Drillholes and
Page 99 and 100:
steep, is generally associated with
Page 101 and 102:
Figure 7.15Trace Element Analysis b
Page 103 and 104:
for which an age of c.110 Ma has be
Page 105 and 106:
Figure 8.1Brucejack Deposit Mineral
Page 107 and 108:
Figure 9.13D Geophysical Model Sche
Page 109 and 110:
10.0 DRILLINGInformation in this se
Page 111 and 112:
Figure 10.1Core in Wooden Core Boxe
Page 113 and 114:
Figure 10.3Brucejack Property Diamo
Page 115 and 116:
The cut PQ samples weighed approxim
Page 117 and 118:
submitted to ALS. In addition, a re
Page 119 and 120:
Primary sample gold concentrations
Page 121 and 122:
12.0 DATA VERIFICATIONIndependent s
Page 123 and 124:
12.2 DATA VERIFICATION BY SNOWDENSn
Page 125 and 126:
Figure 12.4Sample Verification Resu
Page 127 and 128:
Year Program ID Laboratory ** Gravi
Page 129 and 130:
13.3.2 2012 TO 2013 TEST SAMPLESIns
Page 131 and 132:
Table 13.7 Conceptual Master Compos
Page 133 and 134: ALSInspectorateFire Assay (g/t) Met
Page 135 and 136: 13.3.6 ORE HARDNESS TEST WORKTable
Page 137 and 138: Table 13.14 Sample Specific Gravity
Page 139 and 140: In general, there was a reduction i
Page 141 and 142: Figure 13.5 Effect of Primary Grind
Page 143 and 144: In 2012 and 2013, most of the flota
Page 145 and 146: Further cleaner tests were conducte
Page 147 and 148: Figure 13.14 Effect of Cleaner Flot
Page 149 and 150: SampleIDWZ-2CompositeCompositeBJ-AC
Page 151 and 152: The 2012 and 2013 tests routinely i
Page 153 and 154: Figure 13.17Cumulative Stage GRG ve
Page 158 and 159: Figure 13.21 Silver Cyanide Extract
Page 160 and 161: Table 13.24 Head Sample Cyanidation
Page 162 and 163: Based on the findings of the prelim
Page 164 and 165: Primary Grind/Regrind SizesConcentr
Page 166 and 167: Further cyanide leach tests were ca
Page 168 and 169: including samples with low head gra
Page 170 and 171: Grade (g/t) Recovery/Extraction (%)
Page 172 and 173: Figure 13.28 Variability Test Resul
Page 174 and 175: Table 13.31Locked Cycle Tests Resul
Page 176 and 177: Table 13.33Conventional Thickening
Page 178 and 179: 13.3.11 CONCLUSIONSA review of prel
Page 180 and 181: Table 13.37Head Grade(g/t)Metallurg
Page 182 and 183: • geological interpretation and m
Page 186 and 187: 14.6 COMPOSITING OF ASSAY INTERVALS
Page 188 and 189: In the high-grade domains (includin
Page 190 and 191: Table 14.3Parameters to Describe Go
Page 192 and 193: 14.8.3 HIGH-GRADE DOMAINS - PROBABI
Page 194 and 195: analysis. Any target blocks that re
Page 196 and 197: For VOK and West Zone the interpola
Page 198 and 199: Table 14.9Comparison of the Mean Co
Page 200 and 201: the economic viability of the depos
Page 202 and 203: 14.15 RESOURCE REPORTINGThe mineral
Page 204 and 205: 15.0 MINERAL RESERVE ESTIMATES15.1
Page 206 and 207: Table 15.1Net Smelter Return Parame
Page 208 and 209: 15.4 MINING SHAPESAMC used the Mine
Page 210 and 211: Strike length varies considerably w
Page 212 and 213: 15.7 MINERAL RESERVESMineral reserv
Page 214 and 215: Figure 15.4Reserve Shapes and Minin
Page 216 and 217: 16.2 MINE DESIGN16.2.1 ACCESS AND R
Page 218 and 219: Figure 16.2Brucejack Twin Declines
Page 220 and 221: Figure 16.4Typical Level Plan - 1,2
Page 222 and 223: Table 16.1Development Design Parame
Page 224 and 225: Figure 16.7Mineable Stope Shapes -
Page 226 and 227: Once the stope footprint is slashed
Page 228 and 229: 16.3.3 STOPE SEQUENCEThe mining seq
Page 230 and 231: Stopes that will not be re-exposed
Page 232 and 233: Table 16.5LOM Backfilling - Waste R
Page 234 and 235:
Figure 16.11Extent of Mine Developm
Page 236 and 237:
• development of the 1,210 and 1,
Page 238 and 239:
Figure 16.13Life of Mine Production
Page 240 and 241:
Table 16.7LOM Tonnes and GradesYear
Page 242 and 243:
Table 16.8Rock Mass PropertiesUnitU
Page 244 and 245:
AMC estimated ore recovery in the w
Page 246 and 247:
FULL-WIDTH UNDERCUTSThe Project min
Page 248 and 249:
Table 16.10Mine Infrastructure Exca
Page 251 and 252:
with lesser components supplied by
Page 253 and 254:
un was completed representing glaci
Page 255 and 256:
Table 16.12Underground Development
Page 257 and 258:
TRANSMIXERSShotcrete will be delive
Page 259 and 260:
The VOK Zone and West Zone mining a
Page 261 and 262:
Figure 16.17 shows a ventilation co
Page 263 and 264:
• regular inspection of the conve
Page 265 and 266:
On low-head applications, a submers
Page 267 and 268:
Figure 16.18Dewatering PlanPretium
Page 269 and 270:
Figure 16.20CrusherThe 42 in wide b
Page 271 and 272:
16.9.3 POWER REQUIREMENTS AND ELECT
Page 273 and 274:
Electrical power will be supplied t
Page 275 and 276:
To supply service water to the high
Page 277 and 278:
16.9.7 WORKSHOP AND STORESThe maint
Page 279 and 280:
Radio communications will be establ
Page 281 and 282:
16.9.11 PORTAL STRUCTUREA portal st
Page 283 and 284:
propane consumption. Table 16.18 sh
Page 285 and 286:
16.10 PASTE FILL DISTRIBUTIONP&C co
Page 287 and 288:
Figure 16.33Paste Fill Distribution
Page 289 and 290:
Figure 16.35Pre-production Paste Fi
Page 291 and 292:
RoleHeadCountMaintenance (72)Mainte
Page 293 and 294:
17.0 RECOVERY METHODS17.1 MINERAL P
Page 295 and 296:
The process plant will consist of t
Page 297 and 298:
17.1.4 PLANT DESIGNMAJOR DESIGN CRI
Page 299 and 300:
• a belt conveyor, 914 mm wide by
Page 301 and 302:
CONCENTRATE REGRINDINGThe flotation
Page 303 and 304:
The dried tabling concentrate will
Page 305 and 306:
solution strength. The solution wil
Page 307 and 308:
PROCESS CONTROL AND INSTRUMENTATION
Page 309 and 310:
• vendors’ instrumentation pack
Page 311 and 312:
18.0 PROJECT INFRASTRUCTURE18.1 OVE
Page 313 and 314:
Figure 18.1Brucejack Overall Site L
Page 315 and 316:
18.2 GEOTECHNICAL18.2.1 OVERVIEWThe
Page 317 and 318:
18.3 ACCESS18.3.1 ACCESS ROADSThe B
Page 319 and 320:
Figure 18.3Knipple Glacier Access R
Page 321 and 322:
available in the winter and also pr
Page 323 and 324:
18.5 GRADING AND DRAINAGEThe site w
Page 325 and 326:
AVALANCHE FREQUENCYAvalanche freque
Page 327 and 328:
• portal fuel storage• conveyor
Page 329 and 330:
Operations CampSize 2 avalanches fr
Page 331 and 332:
Figure 18.5Access Road Avalanche Ha
Page 333 and 334:
and dated June 2013. As requested b
Page 335 and 336:
Figure 18.7Photo of Typical Slopes
Page 337 and 338:
• the design of special towers to
Page 339 and 340:
modular construction where possible
Page 341 and 342:
collect waste water during maintena
Page 343 and 344:
water treatment plant to increase t
Page 345 and 346:
Air/vacuum valves will be installed
Page 347 and 348:
Figure 18.10Foot Print of 3% Deposi
Page 349 and 350:
A pre-manufactured trailer will be
Page 351 and 352:
• fuel storage• vendors’ inst
Page 353 and 354:
18.17 OFF-SITE INFRASTRUCTURE18.17.
Page 355 and 356:
18.17.3 BOWSER AIRSTRIPRegular char
Page 357 and 358:
INSTRUMENT APPROACH PROCEDURESAn IA
Page 359 and 360:
AERODROME PERSONNEL AND MAINTENANCE
Page 361 and 362:
TRANSPORT MODE OPTIONSTruckThere ar
Page 363 and 364:
SBT has the ability to mobilize cra
Page 365 and 366:
Pretivm is committed to a process t
Page 367 and 368:
engage with the Nisga’a Lisims Go
Page 369 and 370:
Average monthly temperature data us
Page 371 and 372:
The fisheries resources and fish ha
Page 373 and 374:
was conducted on the NPR values of
Page 375 and 376:
all modelling exercises, the accura
Page 377 and 378:
16 corridor is recovering from the
Page 379 and 380:
• reporting and feedback mechanis
Page 381 and 382:
Approximately 47% of the tailings w
Page 383 and 384:
20.1.8 WASTE MANAGEMENTMine WastesP
Page 385 and 386:
from the site. Fixed equipment, suc
Page 387 and 388:
• Forest Act (BC)• Forest and R
Page 389 and 390:
Table 20.5List of Federal Approvals
Page 391 and 392:
21.1.2 ESTIMATE BASE DATE AND VALID
Page 393 and 394:
…costs not directly attributable
Page 395 and 396:
• small tools• consumables• c
Page 397 and 398:
The total cost for Major Area 33 -
Page 399 and 400:
The unit cost estimates are based o
Page 401 and 402:
MINE OPERATING COSTSThe total under
Page 403 and 404:
Table 21.7Summary of Process Operat
Page 405 and 406:
Table 21.8Summary of Backfilling Op
Page 407 and 408:
DescriptionLabourForceTotal Cost($/
Page 409 and 410:
22.0 ECONOMIC ANALYSIS22.1 INTRODUC
Page 411 and 412:
Figure 22.1Pre-tax Cash FlowCumulat
Page 413 and 414:
transport the concentrate to a buil
Page 415 and 416:
Figure 22.4Pre-tax Payback Period S
Page 417 and 418:
Canadian development expense and 60
Page 419 and 420:
23.0 ADJACENT PROPERTIESSnowden not
Page 421 and 422:
23.2 HIGH PROPERTYThe Teuton Resour
Page 423 and 424:
managers, and the mining manager, a
Page 425 and 426:
MANAGEMENT PROCEDURESThe EPCM contr
Page 427 and 428:
Figure 24.2Level 1 Execution Schedu
Page 429 and 430:
Capital equipment purchases will be
Page 431 and 432:
Construction work will be split int
Page 433 and 434:
provided with dedicated emergency p
Page 435 and 436:
econciliation to the freight consol
Page 437 and 438:
PROJECT TEAM RESPONSIBILITIESIt is
Page 439 and 440:
WBS Area PretivmEPCMTeamUnderground
Page 441 and 442:
24.1.15 RISK MANAGEMENTA Risk Asses
Page 443 and 444:
There may be opportunities to optim
Page 445 and 446:
The conceptual layout is preliminar
Page 447 and 448:
25.4.8 TAILINGS DELIVERY SYSTEMThe
Page 449 and 450:
26.0 RECOMENDATIONS26.1 GEOLOGYThe
Page 451 and 452:
• Further test work to identify t
Page 453 and 454:
The estimated cost for the above-me
Page 455 and 456:
• Careful planning as well as det
Page 457 and 458:
26.5.6 BRUCEJACK OUTLET CONTROL STR
Page 459 and 460:
• Further groundwater quality and
Page 461 and 462:
27.0 REFERENCES27.1 AVALANCHE HAZAR
Page 463 and 464:
Price, W. (2005). Mend Report 9.1c:
Page 465 and 466:
Britton, J. M. and Alldrick, D. J.,
Page 467 and 468:
Olssen. L., Jones, I.. 2012b. Preti
Page 469 and 470:
28.0 CERTIFICATES OF QUALIFIED PERS
Page 471 and 472:
28.2 IVOR W.O. JONES, M.SC., CP, FA
Page 473 and 474:
28.3 JOHN HUANG, PH.D., P.ENG.I, Ji
Page 475 and 476:
28.5 HAMISH WEATHERLY, M.SC., P.GEO
Page 477 and 478:
28.7 SABRY ABDEL HAFEZ, PH.D., P.EN
Page 479 and 480:
28.9 CATHERINE SCHMID, M.SC., P.ENG
Page 481 and 482:
28.11 BRENT MCAFEE, P.ENG.I, Brent
Page 483 and 484:
28.13 MICHAEL CHIN, P.ENG.I, Michae
Page 485 and 486:
28.15 MICHAEL PAUL WISE, P.ENG., MB
Page 487 and 488:
28.17 CLAYTON RICHARDS, P.ENG.I, Cl
Page 489 and 490:
28.19 ALI FARAH, P.ENG.I, Ali Farah
Page 491 and 492:
28.21 S. (KUMAR) SRISKANDAKUMAR, M.
show all

Feasibility Study and Technical Report - Pretivm

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?