Underground portal Test leach pad Mill Crusher # Polley Mountain Bootjack Lake Polley Lake Wight Pit Bell Pit Cariboo Pit Pond Pit Southeast Pit Springer Pit Boundary Zone Junction Zone C2 Zone WX Zone Quarry Zone North Springer Zone 591,000 591,000 592,000 592,000 593,000 593,000 594,000 5,821,000 5,821,000 5,822,000 5,822,000 5,823,000 5,823,000 5,824,000 5,824,000 5,825,000 5,825,000 5,826,000 Jackson, M.L. (2008): Evolution of the Northeast zone breccia body, Mount Polley mine, British Columbia; unpublished M.Sc. thesis, University of British Columbia, 232 p. Logan, J.M. and Mihalynuk, M.G. (2005): Regional geology and setting of the Cariboo, Bell, Springer and Northeast porphyry Cu-Au zones at Mount Polley, south-central British Columbia; in Geological Fieldwork 2004, B.C. Ministry of Energy and Mines, Paper 2005-1, 249-270 pp. Logan, J.M., Bath, A., Mihalynuk, M.G., Rees, C.J., Ullrich, T. D. and Friedman, R.M. (2007a): Regional geology of the Mount Polley area, central British Columbia; BC Ministry of Energy, Mines and Petroleum Resources, Geoscience Map 2007-1, 1:50,000 scale. Logan, J.M., Mihalynuk, M.G., Ullrich, T. and Friedman, R.M. (2007b): U-Pb ages of intrusive rocks and 40Ar/39Ar plateau ages of copper-gold-silver mineralization associated with alkaline intrusive centres at Mount Polley and the Iron Mask Batholith, Southern and Central British Columbia; in BC Ministry of Energy, Mines and Petroleum Resources, Geological Fieldwork 2006, 93-116 pp. Mortensen, J.K., Ghosh, D.K. and Ferri, F. (1995): U-Pb geochronology of intrusive rocks associated with copper-gold porphyry deposits in the Canadian Cordillera; in Porphyry Deposits of the Northwestern Cordillera of North America (Schroeter, T.G., ed.), CIM Special Volume No. 46, 142-158 pp. Pass, H. E. (2010): Breccia-hosted chemical and mineralogical zonation patterns of the Northeast Zone, Mt. Polley Cu-Ag-Au alkalic porphyry deposit, British Columbia, Canada; unpublished Ph.D. thesis, University of Tasmania (CODES), 276 p. Read, P. B. (1997): Surface geology of the area east of the Cariboo Pit, Mount Polley Mine; unpublished report for Mount Polley Mining Corporation-Imperial Metals Corporation, Geotex Consultants Limited, December 1997. Ross, K.V. (2004): Alteration studies of the Northeast, Springer and Bell zones, Mount Polley Mine; internal reports prepared for Imperial Metals Corporation. Map 5. Mount Polley Pits and Zones 0 200 400 m Planned pit Active pit Completed pit Reserve/Exploration zone Property boundary References ! \ ! Prince George Vancouver VICTORIA ^ Map Area Quesnel terrane Stikine terrane ! ! D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D DD D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D DD D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D DD D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D DD D D DD D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D ! ! ! ! ! ! f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f . . ! . . . . ² ² ³ LTrpd2 LTrpd1 LTrNbabx LTrNbabx LTrNbabx LTrNbabx LTrNbabx LTrpbx2m LTrpkm LTrpap LTrpkm LTrpbx2 LTrpkm LTrpkm LTrppx LTrpbx2 LTrNbabx LTrpd1 LTrpkm LTrpbx2 LTrpmdu LTrpkm LTrpmdu LTrpd2 LTrpbx1 LTrpbx1m LTrpbx1m LTrpmdu LTrpmdu LTrpbx1 LTrpd2 LTrpd2 LTrpd2 LTrpbx2 LTrpkm LTrpd1 LTrpd1 LTrpd1 LTrpbx2 LTrpkm LTrNbabx LTrNbabx LTrpap LTrpap LTrpap LTrpdb LTrpkm LTrpbx1 LTrpbx2 LTrppp LTrpmz LTrpbx1m LTrpbx1m LTrpbx1 LTrppp LTrpd1 LTrpmdu LTrppp LTrpap LTrpkm LTrpkm LTrpd1 LTrpd1 LTrpbx1 LTrpbx2 LTrpap LTrpkm LTrpkm LTrpkm LTrpkm LTrpkm LTrpkm LTrpkm LTrpbx2 LTrpbx2m LTrpbx2 LTrJNbc LTrpkm LTrpbx2m LTrpbx2 LTrpmdu LTrpbx3 LTrpbx3a LTrpmdu EJbc EJt LTrJNbc LTrpkm LTrpkm LTrpkm LTrpmdu LTrNbabx LTrNbabx LTrpmz LTrpkm LTrpap LTrpkm LTrpbx2m X Y X Y X Y X Y X Y X Y X Y Bootjack Lake Polley Lake D U Brown Wall Fault D U Green Giant Fault North Springer Fault D U East Cariboo Fault Polley Fault co n ta ct in fe r red f r om aero ma gne ti c s i g n a t u re 76 70 15 74 90 75 75 204.7 +/- 3 Ma, U-Pb (z) 165.2 +/- 1.8 Ma, Ar/Ar (hb) 205.2 +/- 1.2 Ma, U-Pb (z) 220.8 +/- 1.3 Ma, Ar/Ar (bi) 207.8 +/- 1 Ma, Re/Os (mo) 205.2 +/- 1.2 Ma, Ar/Ar (bi) 206.2 +/- 1 Ma, Re/Os (mo) 83 80 82 86 73 80 85 84 79 83 73 78 70 73 67 86 85 86 88 48 71 85 85 21 46 75 71 76 87 34 29 86 81 87 81 87 78 88 75 70 86 74 40 81 72 86 81 66 72 68 57 69 72 76 74 69 78 75 80 76 74 57 56 63 58 62 84 68 64 71 74 81 66 72 53 86 66 65 64 76 79 80 83 65 83 64 79 88 87 76 73 88 81 85 86 82 74 79 57 84 83 85 1000 1 10 0 1000 1200 1100 1000 1200 1000 1200 1000 1100 1100 1000 591,000 591,000 592,000 592,000 593,000 593,000 594,000 594,000 5,821,000 5,821,000 5,822,000 5,822,000 5,823,000 5,823,000 5,824,000 5,824,000 5,825,000 5,825,000 5,826,000 5,826,000 Map 1. Geology of Mount Polley Intrusive Complex (pre-mining, except Cariboo-Bell zones) Geology Geology is based on Imperial Metals’ mapping by C. Rees, supplemented by L. Ferreira and L. Bjornson, and fault and geophysical interpretation by C. Taylor. Data is primarily from outcrops or trenching on the pre-mining surface, except for the Cariboo and Bell zones where geology is simplified from detailed bench mapping and computer projections, both by G. Gillstrom. Some geological contacts may be faults in part, in particular in the Cariboo-Bell zones. Other map sources include Logan et al. (2007a: unit EJt) and Read (1997). Bootjack Lake Polley Lake 591,000 591,000 592,000 592,000 593,000 593,000 594,000 5,822,000 5,822,000 5,823,000 5,823,000 5,824,000 5,824,000 5,825,000 5,826,000 Bootjack Lake Polley Lake 591,000 591,000 592,000 592,000 593,000 593,000 594,000 5,822,000 5,822,000 5,823,000 5,823,000 5,824,000 5,824,000 5,825,000 5,826,000 Map 2. Copper Mineralization Map 3. Gold Mineralization Grade contours The Cu and Au grade contours were generated from the 3-D computerized block models used at the Mount Polley Mine for reserve estimation. The grade values in each block in the model are geostatistically estimated using ‘Ordinary Kriging’ from exploration drill assay results. The block models include already mined ore as well as remaining resources (to December, 2012). The three main contours shown are the smoothed outlines of grade blocks averaging 0.1, 0.3 and 0.6 percent copper on Map 2, and 0.1, 0.3 and 0.6 grams per ton gold on Map 3. These contours display the grade distribution at an elevation most representative of the ore zones. In the core of Mount Polley centred on the Springer zone the contours are at an elevation of 1,000 metres (a.s.l.); in the Northeast zone the contours are at an elevation of 900 metres (a.s.l.). This is roughly equivalent to 100-200 metres below the pre-mining topography. Patterns of grade distribution at deeper levels may be different in detail but are generally conformable. The ‘Limit of elevated Cu, Au mineralization’ contour is less rigorously defined, based on assay results from exploration drilling, trenching and mapping. (Kriging is a geostatistical estimation method that infers the value of a random field at an unobserved location from observed samples at known locations.) Bootjack Lake Polley Lake 591,000 591,000 592,000 592,000 593,000 593,000 594,000 5,822,000 5,822,000 5,823,000 5,823,000 5,824,000 5,824,000 5,825,000 5,825,000 5,826,000 Alteration Highly generalized map of hydrothermal alteration assemblages at Mount Polley. The smoothed alteration outlines should not be taken to indicate that the alteration pattern necessarily postdates intrusion or breccia contacts, or faulting. Limit of elevated Cu, Au mineralization 0.6% Copper 0.3% Copper 0.1% Copper Pit outline Planned pit Limit of elevated Cu, Au mineralization 0.6 g/t Gold 0.3 g/t Gold 0.1 g/t Gold Pit outline Planned pit Map 4. Alteration Map 0 200 400 m 0 200 400 m 0 200 400 m LTrpbx2m LTrpbx2 LTrpbx2. As bx1, but occurs outside central MPIC and is characterized by less texture-destructive alteration than bx1. Igneous cement is less common than rock flour matrix and/or mineral cement. bx2m = mineralized to ore or near ore-grade. Geology of the Mount Polley Intrusive Complex 1 : 10,000 September 2013 0 500 1,000 250 m DRAFT Universal Transverse Mercator Projection, Zone 10 Horizontal Datum: North American Datum 1983 Part of NTS Sheet 93A/12 Chris Rees, Greg Gillstrom, Lee Ferreira, Leif Bjornson and Chris Taylor Geoscience BC Map 2013-21-1 True north is 1.08° west of grid north Pit outline Planned pit Pit outline Planned pit LTrpbx3 LTrpbx3a LTrpbx3. Fragmental breccia (polymictic) comprising mm- to cm-scale, rounded to angular, monzonitic porphyry clasts in a related rock flour matrix. Mostly matrix supported. Distinguished from LTrpbx1 and LTrpbx2 by a lack of (1) coherent rocks, (2) igneous breccia cement, (3) potassic alteration (except in transported clasts), and (4) mineralization (except pyrite). Local garnet alteration. Subtype bx3a has a finer rock flour matrix, and a high matrix to clast ratio. LTrppp LTrpkm LTrpd1 LTrbabx LTrpmz LTrpd2 LTrppx Potassium feldspar-(plagioclase-)phyric monzonite. Pale to deep pink, fine to coarse grained groundmass, with sub-cm to megacrystic (2-3 cm) phenocrysts, with trachytoid alignment in some dikes and larger intrusions. Plagioclase feldspar porphyry (monzodiorite). Grey to red-pink where strongly altered, typically crowded with phenocrysts up to 5 mm, locally aligned, in fine-grained groundmass. Monzonite to monzodiorite. Pale pink, medium-grained, even-textured, More homogeneous than units LTrpd2, LTrpmdu, and lacking in inclusions. Diorite to monzodiorite, leucodiorite, and minor monzonite. Characterized by uneven textures and numerous small inclusions. Grey to green-grey, cream-grey (pink where more altered), medium grained, usually inequigranular to subporphyritic (plagioclase and local augite phenocrysts). Even-textured augite(-biotite) diorite to monzodiorite. Speckled medium-grey, medium to coarse grained, mostly equigranular. Pyroxenite, minor melagabbro. Dark green to black, medium to coarse grained. Basalt to andesite, or intrusive-equivalent meladiorite, microdiorite. Undivided volcanic and subvolcanic coherent rocks and fragmental breccias. Grey, dark mauve, dark green, finely plagioclase- or pyroxene-phyric, local analcite or pseudoleucite. Breccias are undifferentiated igneous-hydrothermal and volcaniclastics, characterized by a lack of felsic porphyry fragments. Local lenses of mafic or calcareous sediments, limestone. Gradational contacts with MPIC, where some breccias may be hydrothermal and coeval with MPIC intrusions. LTrpmdu Monzodiorite and monzonite, some diorite, undivided. General, heterogeneous unit of intermediate intrusions with poorly defined internal contacts. Pink to grey, fine to medium grained, equigranular to plagioclase-phyric; mafic lithic and other inclusions common, verging on igneous breccia locally. Includes small dikes and zones of bx1 or bx2 hydrothermal breccia not differentiated on map. LTrpdb Leucodiorite porphyry, banded. Minor unit. Pale green and pale grey, fine to medium grained, characterized by wispy laminations (possible flow banding) and fluidal (?) clasts; gradational with unit Pmdu. NICOLA GROUP (NORIAN) Glacial striae: direction known, direction unknown ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Elevation contour (20m interval): major, minor ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Fault: approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! D Individual mapped outcrop location, area of mapped outcrop ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! X Y Geochronology sample (labelled by age, analysis method) ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! D = downthrown side ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! D U dip of fault plane, and slickenline orientation, sense of shear ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! f Structure: bedding, fracture cleavage ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! . 15 74 Contact: defined, approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ³ Fault: approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Contact: defined, approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Disclaimer: While every effort has been taken to ensure the accuracy of the information in this map, the data are provided on an 'as-is' basis, without any warranty, guarantee or representation of any kind, whether expressed or implied. It is the responsibility of the user to check the facts before entering any financial or other commitment based upon this information. LTrpbx1 LTrpbx1m LTrpbx1. Intrusive complex with a significant amount of fragmental breccia (polymictic/oligomictic) or inclusion-rich intrusion, comprising (sub)rounded to subangular diorite to monzonite porphyry clasts in a cognate igneous ‘cement’ (igneous breccia), and/or a clastic matrix of fine to coarse rock flour. Clasts in igneous breccia may be partly resorbed. Contacts are gradational into variably brecciated (monomictic jigsaw-fit type) diorite to monzonite. Characteristic of bx1 (though not ubiquitous) is texture-destructive alteration due to moderate to strong secondary K-feldspar ± biotite ± albite ± magnetite ± actinolite/diopside ± garnet, replacing the igneous groundmass or breccia matrix, or permeating fractures. LTrpbx1m = mineralized to ore or near ore-grade with chalcopyrite ± bornite or pyrite. EJt LTrJNbc LTrpap Trachyandesite tuff. Plagioclase-hornblende-biotite and minor (1%) quartz grains in aphanitic mauve-grey matrix. 196.7 ±1.3 Ma, U-Pb zircon (Logan et al. 2007b). LATE TRIASSIC - EARLY JURASSIC NICOLA GROUP (IN PART) Breccia, conglomerate. Massive, coarse, matrix-supported polymictic breccia and minor cobble conglomerate, with clasts of intermediate intrusives, volcanics and microporphyries, in grey to maroon crystal-lithic matrix. Minor lithic sandstone-siltstone, and rare trachyte-latite. Strong hematite cement immediately north of and overlying MPIC. Labelled EJbc where known Jurassic. LATE TRIASSIC MOUNT POLLEY INTRUSIVE COMPLEX (MPIC) Augite porphyry dike. Green-grey, fine grained basaltic-andesitic dikes with subequant clinopyroxene phenocrysts, and lesser aphyric mafic-intermediate dikes. Note: Areas of outcrops are shown with a darker shade I K-feldspar* − biotite − albite − magnetite − diopside/actinolite ± calcite ± andradite garnet ± sulfides. Retrograde chlorite ± sericite ± albite ± epidote, ± calcite ± zeolite ± prehnite ± clay. POTASSIC-SODIC, CALC-POTASSIC II K-feldspar − biotite − magnetite – albite ± calcite ± sulfides. Minor diopside/actinolite ± epidote ± andradite garnet. Retrograde chlorite ± sericite ± albite ± gypsum. Dashed hatch pattern where ill- defined. III K-feldspar − magnetite − biotite − chlorite − calcite − andradite garnet ± albite ± epidote ± apatite ± clinozoisite ± anhydrite ± sulfides. Minor diopside/actinolite. Retrograde chlorite ± carbonate ± sericite ± gypsum ± rare quartz. IV Albite − epidote – pyrite ± magnetite ± K-feldspar ± calcite ± sulfides. MARGINAL POTASSIC - PROPYLITIC V Andradite garnet – epidote ± albite ± calcite ± magnetite ± sulfides. SKARN (s.l.) Note: Weak to intense, fracture-controlled to pervasive ‘reddening’ due to nanoscale hematite inclusions in secondary K-feldspar is common in I, II, III; sporadic in IV. * Alteration Cartography by Fion Ma and Fionnuala Devine from Geoscience BC, and Chris Rees from Imperial Metals Corporation. Data sources Acknowledgments Geological terrane data Massey, N.W.D, MacIntyre, D.G., Desjardins, P.J. and Cooney, R.T. (2005): Digital Geology Map of British Columbia: Whole Province; B.C. Ministry of Energy and Mines, Geofile 2005-1, URL < > [November 2007] http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/GeoFiles/Pages/ 2005-1.aspx Elevation model prepared by Kaz Shimamura, Geological Survey of Canada > http://archive.ilmb.gov.bc.ca/crgb/pba/trim/ Topographic data BC TRIM (2006): British Columbia Terrain Resource Information Mapping (TRIM) Digitial Map Products; B.C. Ministry of Forests, Lands and Natural Resource Operations, Crown Registry and Geographic Base Branch. URL < Elevation model data Canadian Council on Geomatics (2004): Canadian digital elevation data; Natural Resources Canada, GeoBase®, URL < [October 2004] http://www.geobase.ca/geobase/en/data/cded/description.html > [March 2006]
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
-
Underground portal
Test leach pad
Mill
Crusher
#
PolleyMountain
B o o t j a c k L a k e
P o l l e y L a k e
WightPit
Bell Pit
CaribooPit
Pond Pit
SoutheastPit
SpringerPit
BoundaryZone
JunctionZone
C2Zone
WX Zone
QuarryZone
NorthSpringer
Zone
591,000
591,000
592,000
592,000
593,000
593,000
594,000
594,000
5,82
1,00
0
5,82
1,00
0
5,82
2,00
0
5,82
2,00
0
5,82
3,00
0
5,82
3,00
0
5,82
4,00
0
5,82
4,00
0
5,82
5,00
0
5,82
5,00
0
5,82
6,00
0
5,82
6,00
0
Jackson, M.L. (2008): Evolution of the Northeast zone breccia body, Mount Polley mine, BritishColumbia; unpublished M.Sc. thesis, University of British Columbia, 232 p.Logan, J.M. and Mihalynuk, M.G. (2005): Regional geology and setting of the Cariboo, Bell, Springerand Northeast porphyry Cu-Au zones at Mount Polley, south-central British Columbia; in GeologicalFieldwork 2004, B.C. Ministry of Energy and Mines, Paper 2005-1, 249-270 pp.Logan, J.M., Bath, A., Mihalynuk, M.G., Rees, C.J., Ullrich, T. D. and Friedman, R.M. (2007a):Regional geology of the Mount Polley area, central British Columbia; BC Ministry of Energy, Mines andPetroleum Resources, Geoscience Map 2007-1, 1:50,000 scale.Logan, J.M., Mihalynuk, M.G., Ullrich, T. and Friedman, R.M. (2007b): U-Pb ages of intrusive rocksand 40Ar/39Ar plateau ages of copper-gold-silver mineralization associated with alkaline intrusivecentres at Mount Polley and the Iron Mask Batholith, Southern and Central British Columbia; in BCMinistry of Energy, Mines and Petroleum Resources, Geological Fieldwork 2006, 93-116 pp.Mortensen, J.K., Ghosh, D.K. and Ferri, F. (1995): U-Pb geochronology of intrusive rocksassociated with copper-gold porphyry deposits in the Canadian Cordillera; in Porphyry Deposits of theNorthwestern Cordillera of North America (Schroeter, T.G., ed.), CIM Special Volume No. 46, 142-158pp.Pass, H. E. (2010): Breccia-hosted chemical and mineralogical zonation patterns of the NortheastZone, Mt. Polley Cu-Ag-Au alkalic porphyry deposit, British Columbia, Canada; unpublished Ph.D.thesis, University of Tasmania (CODES), 276 p.Read, P. B. (1997): Surface geology of the area east of the Cariboo Pit, Mount Polley Mine;unpublished report for Mount Polley Mining Corporation-Imperial Metals Corporation, GeotexConsultants Limited, December 1997.Ross, K.V. (2004): Alteration studies of the Northeast, Springer and Bell zones, Mount Polley Mine;internal reports prepared for Imperial Metals Corporation.
Map 5. Mount Polley Pits and Zones
0 200 400 m
Planned pit
Active pit
Completed pit
Reserve/Exploration zone
Property boundary
References
!
\
!
Prince George
Vancouver
VICTORIA
^Map Area
Quesnel terrane
Stikine terrane
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!!!
!!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!
!
!!!!
!!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!!
!!!!!
!!!!!!!!
!!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!!
!!
!!
!!
!!
D
DD
DD D
DD
D D
DDD
DD
D
D
D
D
D
DD D
D DD
D
DD
D
DD
D
D D
DD
D
D
D
D
D
D
DD
D
D
D
DD
D
D
D D
D
D
D
D DD
D
D
DD
D
DD
D
D
D
D
D D
D
D D
D
D
D
D
D
D
DD
D
DDD
DD D
DD
DD
D
D
D
D
DD
D
D
D D D
D
D
D
D
D
DD
D
D
D
DD
D
DD
D
D
D D
D
D
D
D
D
DD
D
D
D
D
D
DD
DD
D
D
DDDD
D
D
D
D
D
DD
D
D
D
D
DD
D
D
D
D
DD
D
D D
D
D
D
D
D
DD
D
D
D
D
D
DD
D
D
DD
D
DD
D
D
DD
D
D DD
DD
D
D
DD
D
D
DD
D
DD
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
DD
D
D
D D
DD
D
DD
D
D
DD
D
DD
D
D
D
D
DD
D
D D
D
DD
D
D
D
D
D
D
D D
D
DD D
D
DD
D
D
D
D
D
DD
D
D
DD
D
DD
D
D
D
D
D
D
D
DD
D
D
DD
D
D
DD
D
D
D
D
DD
D
D
D
D
D
D
D
D D
DD
D
D D D
D
D
D
D D
D
D
DD
D
D
DD
DD
D
D D
D
D
DDDD
DD
D
DD
D
D
D D
D
D
D
D
D
D
D
D
D
DDD
D
D DDD
D D
D
D
DD
D
D
D
D
DD
D
D
D
D
D D D
D
D
D
D
DD
D
D
D
D
D
DD
D
D
D
D
D
DD
D
DD
D
D
D
D
D
DDD
DD
DD
D
DDDD
DD
D
DD D
D
D
D
D
DD
D DD
D
D
D
D
D
D
DD
D
D
DD
D
D
D
D
D
D
DDD
D
D
D
DD
D
D
D
D
DD
D
D
!
!
!
!
!
!
!
f
f
ff
fff
ff
ff
f
fff
f
f
ff
f
f
f f
f f
ff ff
f ff
f
f f
ff
f
ff f
f
f
f
f
f
ff
f
f
f
f
f
ffff
f
ff
f f
fff
f
f
ff
f f
f
f
f f
ff
f
f
f
f
f
f
ff
f
f
f
f
f f
f
f
f
ff
f
.
.
!.
.
.
.
²
²
³
LTrpd2
LTrpd1
LTrNbabx
LTrNbabx
LTrNbabx
LTrNbabx
LTrNbabx
LTrpbx2m
LTrpkm
LTrpap
LTrpkm
LTrpbx2LTrpkm
LTrpkm
LTrppx
LTrpbx2
LTrNbabx
LTrpd1
LTrpkm
LTrpbx2
LTrpmdu
LTrpkm
LTrpmdu
LTrpd2
LTrpbx1
LTrpbx1m
LTrpbx1m
LTrp
mdu
LTrp
mduLTr
pbx1
LTrpd2
LTrpd2
LTrpd2
LTrpbx2
LTrpkm
LTrpd1
LTrpd1
LTrpd1
LTrpbx2
LTrpkm
LTrNbabx
LTrNbabx
LTrpap
LTrpap
LTrpap
LTrpdb
LTrpkm
LTrpbx1
LTrpbx2
LTrppp
LTrpmz
LTrpbx1m
LTrpbx1m
LTrpbx1
LTrppp
LTrpd1
LTrpmdu
LTrppp
LTrpap
LTrpkm
LTrpkm
LTrpd1
LTrpd1
LTrpbx1
LTrpbx2
LTrpap
LTrpkm
LTrpkmLTrpkm
LTrpkm
LTrpkm
LTrpkm
LTrpkmLTrpbx2
LTrp
bx2m
LTrpb
x2
LTrJNbc
LTrpkm
LTrpbx2m
LTrpbx2
LTrpmdu
LTrpbx3
LTrpbx3a
LTrpmdu
EJbc
EJt
LTrJNbc
LTrp
km
LTrpkm
LTrpkm
LTrpmdu
LTrNbabx
LTrNbabx
LTrpmz
LTrpkm
LTrp
ap
LTrpkm
LTrpbx2m
XY
XY
XY
XYXY
XY
XY
B o o t j a c k L a k e
P o l l e y L a k e
DU
Brown Wall FaultDU Green Giant Fault
North
Spri
nger
Fault
DU
East Cariboo
Fault
Polley Fault
contact inferredfrom
aeromagnetic signature
76
70
15
74
90
75
75
204.7 +/- 3 Ma, U-Pb (z)
165.2 +/- 1.8 Ma, Ar/Ar (hb)
205.2 +/- 1.2 Ma, U-Pb (z)
220.8 +/- 1.3 Ma, Ar/Ar (bi)
207.8 +/- 1 Ma, Re/Os (mo)
205.2 +/- 1.2 Ma, Ar/Ar (bi)
206.2 +/- 1 Ma, Re/Os (mo)
83
80
82
86
73
80
85
84
79
83
73
78
70
73
67
86
85
86
8848
71
85
85
21
46
75
71
76
87
34
29
86
81
87
81
87
78
88
75
70
86
74
40
81
72
86
81
66
72
68
57
69
72
76
74
69
78
7580
76
74
57
56
63
58
62
84
68
6471
74
81
66
72
53
86
66
65
64
76
79
80
83
65
83
64
79
88
87
7673
88
81
85
86
82
7479
57
84
83
85
1000
1100
1100
1000
1200
1100
1000
1200
1000
1200
1000
1100
1100
1000
591,000
591,000
592,000
592,000
593,000
593,000
594,000
594,000
5,82
1,00
0
5,82
1,00
0
5,82
2,00
0
5,82
2,00
0
5,82
3,00
0
5,82
3,00
0
5,82
4,00
0
5,82
4,00
0
5,82
5,00
0
5,82
5,00
0
5,82
6,00
0
5,82
6,00
0
Map 1. Geology of Mount Polley Intrusive Complex (pre-mining, except Cariboo-Bell zones)
GeologyGeology is based on Imperial Metals’ mapping by C. Rees, supplemented by L. Ferreira and L. Bjornson, and fault and geophysical interpretation by C. Taylor. Data is primarily from outcrops or trenching on the pre-mining surface, except for the Cariboo and Bell zones where geology is simplified from detailed bench mapping andcomputer projections, both by G. Gillstrom. Some geological contacts may be faults in part, in particular in the Cariboo-Bell zones. Other map sources include Logan et al. (2007a: unit EJt) and Read (1997).
B o o t j a c k L a k e
P o l l e y L a k e
591,000
591,000
592,000
592,000
593,000
593,000
594,000
594,000
5,82
2,00
0
5,82
2,00
0
5,82
3,00
0
5,82
3,00
0
5,82
4,00
0
5,82
4,00
0
5,82
5,00
0
5,82
5,00
0
5,82
6,00
0
5,82
6,00
0
B o o t j a c k L a k e
P o l l e y L a k e
591,000
591,000
592,000
592,000
593,000
593,000
594,000
594,000
5,82
2,00
0
5,82
2,00
0
5,82
3,00
0
5,82
3,00
0
5,82
4,00
0
5,82
4,00
0
5,82
5,00
0
5,82
5,00
0
5,82
6,00
0
5,82
6,00
0
Map 2. Copper Mineralization Map 3. Gold Mineralization
Grade contoursThe Cu and Au grade contours were generated from the 3-D computerized block models used at the Mount Polley Mine for reserve estimation. The grade values in each block in the model are geostatistically estimated using ‘Ordinary Kriging’ from explorationdrill assay results. The block models include already mined ore as well as remaining resources (to December, 2012). The three main contours shown are the smoothed outlines of grade blocks averaging 0.1, 0.3 and 0.6 percent copper on Map 2, and 0.1, 0.3and 0.6 grams per ton gold on Map 3. These contours display the grade distribution at an elevation most representative of the ore zones. In the core of Mount Polley centred on the Springer zone the contours are at an elevation of 1,000 metres (a.s.l.); in theNortheast zone the contours are at an elevation of 900 metres (a.s.l.). This is roughly equivalent to 100-200 metres below the pre-mining topography. Patterns of grade distribution at deeper levels may be different in detail but are generally conformable. The‘Limit of elevated Cu, Au mineralization’ contour is less rigorously defined, based on assay results from exploration drilling, trenching and mapping.
(Kriging is a geostatistical estimation method that infers the value of a random field at an unobserved location from observed samples at known locations.)
B o o t j a c k L a k e
P o l l e y L a k e
591,000
591,000
592,000
592,000
593,000
593,000
594,000
594,000
5,82
2,00
0
5,82
2,00
0
5,82
3,00
0
5,82
3,00
0
5,82
4,00
0
5,82
4,00
0
5,82
5,00
0
5,82
5,00
0
5,82
6,00
0
5,82
6,00
0
AlterationHighly generalized map of hydrothermal alteration assemblages at Mount Polley. The smoothed alteration outlines shouldnot be taken to indicate that the alteration pattern necessarily postdates intrusion or breccia contacts, or faulting.
Limit of elevated Cu,Au mineralization
0.6% Copper
0.3% Copper
0.1% Copper
Pit outline
Planned pit
Limit of elevated Cu,Au mineralization
0.6 g/t Gold
0.3 g/t Gold
0.1 g/t Gold
Pit outline
Planned pit
Map 4. Alteration Map
0 200 400 m
0 200 400 m 0 200 400 m
LTrpbx2m
LTrpbx2 LTrpbx2. As bx1, but occurs outside central MPIC and is characterized by less texture-destructivealteration than bx1. Igneous cement is less common than rock flour matrix and/or mineral cement.bx2m = mineralized to ore or near ore-grade.
Geology of theMount Polley Intrusive Complex
1 : 10,000
September 2013
0 500 1,000250 m
D R A F T
Universal Transverse Mercator Projection, Zone 10Horizontal Datum: North American Datum 1983
Part of NTS Sheet 93A/12Chris Rees, Greg Gillstrom, Lee Ferreira, Leif Bjornson and Chris Taylor
Geoscience BC Map 2013-21-1
True north is 1.08° west of grid north
Pit outline
Planned pit
Pit outline
Planned pit
LTrpbx3
LTrpbx3a
LTrpbx3. Fragmental breccia (polymictic) comprising mm- to cm-scale, rounded to angular,monzonitic porphyry clasts in a related rock flour matrix. Mostly matrix supported. Distinguishedfrom LTrpbx1 and LTrpbx2 by a lack of (1) coherent rocks, (2) igneous breccia cement, (3) potassicalteration (except in transported clasts), and (4) mineralization (except pyrite). Local garnetalteration. Subtype bx3a has a finer rock flour matrix, and a high matrix to clast ratio.
LTrppp
LTrpkm
LTrpd1
LTrbabx
LTrpmz
LTrpd2
LTrppx
Potassium feldspar-(plagioclase-)phyric monzonite. Pale to deep pink, fine to coarse grainedgroundmass, with sub-cm to megacrystic (2-3 cm) phenocrysts, with trachytoid alignment in somedikes and larger intrusions.
Plagioclase feldspar porphyry (monzodiorite). Grey to red-pink where strongly altered, typicallycrowded with phenocrysts up to 5 mm, locally aligned, in fine-grained groundmass.
Monzonite to monzodiorite. Pale pink, medium-grained, even-textured, More homogeneous thanunits LTrpd2, LTrpmdu, and lacking in inclusions.
Diorite to monzodiorite, leucodiorite, and minor monzonite. Characterized by uneven textures andnumerous small inclusions. Grey to green-grey, cream-grey (pink where more altered), mediumgrained, usually inequigranular to subporphyritic (plagioclase and local augite phenocrysts).
Even-textured augite(-biotite) diorite to monzodiorite. Speckled medium-grey, medium to coarsegrained, mostly equigranular.
Pyroxenite, minor melagabbro. Dark green to black, medium to coarse grained.
Basalt to andesite, or intrusive-equivalent meladiorite, microdiorite. Undivided volcanic andsubvolcanic coherent rocks and fragmental breccias. Grey, dark mauve, dark green, finelyplagioclase- or pyroxene-phyric, local analcite or pseudoleucite. Breccias are undifferentiatedigneous-hydrothermal and volcaniclastics, characterized by a lack of felsic porphyry fragments.Local lenses of mafic or calcareous sediments, limestone. Gradational contacts with MPIC, wheresome breccias may be hydrothermal and coeval with MPIC intrusions.
LTrpmdu Monzodiorite and monzonite, some diorite, undivided. General, heterogeneous unit of intermediateintrusions with poorly defined internal contacts. Pink to grey, fine to medium grained, equigranular toplagioclase-phyric; mafic lithic and other inclusions common, verging on igneous breccia locally.Includes small dikes and zones of bx1 or bx2 hydrothermal breccia not differentiated on map.
LTrpdb Leucodiorite porphyry, banded. Minor unit. Pale green and pale grey, fine to medium grained,characterized by wispy laminations (possible flow banding) and fluidal (?) clasts; gradational withunit Pmdu.
NICOLA GROUP (NORIAN)
Glacial striae: direction known, direction unknown ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Elevation contour (20m interval): major, minor ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Fault: approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
DIndividual mapped outcrop location, area of mapped outcrop ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
XYGeochronology sample (labelled by age, analysis method) ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
D = downthrown side ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! DU
dip of fault plane, and slickenline orientation, sense of shear ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
! fStructure: bedding, fracture cleavage! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
!. 1574Contact: defined, approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
³
Fault: approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Contact: defined, approximate, inferred ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Disclaimer: While every effort has been taken to ensure the accuracy of the information in this map, the data are provided on an 'as-is' basis, without any warranty, guarantee or representation of any kind, whether expressed or implied. It is the responsibility of the user to check the facts before entering any financial or other commitment based upon this information.
LTrpbx1
LTrpbx1m
LTrpbx1. Intrusive complex with a significant amount of fragmental breccia (polymictic/oligomictic)or inclusion-rich intrusion, comprising (sub)rounded to subangular diorite to monzonite porphyryclasts in a cognate igneous ‘cement’ (igneous breccia), and/or a clastic matrix of fine to coarse rockflour. Clasts in igneous breccia may be partly resorbed. Contacts are gradational into variablybrecciated (monomictic jigsaw-fit type) diorite to monzonite. Characteristic of bx1 (though notubiquitous) is texture-destructive alteration due to moderate to strong secondary K-feldspar ± biotite± albite ± magnetite ± actinolite/diopside ± garnet, replacing the igneous groundmass or brecciamatrix, or permeating fractures. LTrpbx1m = mineralized to ore or near ore-grade with chalcopyrite± bornite or pyrite.
EJt
LTrJNbc
LTrpap
Trachyandesite tuff. Plagioclase-hornblende-biotite and minor (1%) quartz grains in aphaniticmauve-grey matrix. 196.7 ±1.3 Ma, U-Pb zircon (Logan et al. 2007b).
LATE TRIASSIC - EARLY JURASSIC
NICOLA GROUP (IN PART)
Breccia, conglomerate. Massive, coarse, matrix-supported polymictic breccia and minor cobbleconglomerate, with clasts of intermediate intrusives, volcanics and microporphyries, in grey tomaroon crystal-lithic matrix. Minor lithic sandstone-siltstone, and rare trachyte-latite. Stronghematite cement immediately north of and overlying MPIC. Labelled EJbc where known Jurassic.
LATE TRIASSIC
MOUNT POLLEY INTRUSIVE COMPLEX (MPIC)
Augite porphyry dike. Green-grey, fine grained basaltic-andesitic dikes with subequantclinopyroxene phenocrysts, and lesser aphyric mafic-intermediate dikes.
Note: Areas of outcrops are shown with a darker shade
I K-feldspar* − biotite − albite − magnetite − diopside/actinolite ± calcite ± andradite garnet ±sulfides. Retrograde chlorite ± sericite ± albite ± epidote, ± calcite ± zeolite ± prehnite ± clay.
POTASSIC-SODIC, CALC-POTASSIC
II K-feldspar − biotite − magnetite – albite ± calcite ± sulfides. Minor diopside/actinolite ± epidote ±andradite garnet. Retrograde chlorite ± sericite ± albite ± gypsum. Dashed hatch pattern where ill-defined.
III K-feldspar − magnetite − biotite − chlorite − calcite − andradite garnet ± albite ± epidote ±apatite ± clinozoisite ± anhydrite ± sulfides. Minor diopside/actinolite. Retrograde chlorite ±carbonate ± sericite ± gypsum ± rare quartz.
IV Albite − epidote – pyrite ± magnetite ± K-feldspar ± calcite ± sulfides.
MARGINAL POTASSIC - PROPYLITIC
V Andradite garnet – epidote ± albite ± calcite ± magnetite ± sulfides.
SKARN (s.l.)
Note: Weak to intense, fracture-controlled to pervasive ‘reddening’ due to nanoscale hematite inclusions insecondary K-feldspar is common in I, II, III; sporadic in IV.
*
Alteration
Cartography by Fion Ma and Fionnuala Devine from Geoscience BC, and Chris Rees fromImperial Metals Corporation.
Data sources
Acknowledgments
Geological terrane dataMassey, N.W.D, MacIntyre, D.G., Desjardins, P.J. and Cooney, R.T. (2005): Digital GeologyMap of British Columbia: Whole Province; B.C. Ministry of Energy and Mines, Geofile 2005-1,URL <
> [November 2007] http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/GeoFiles/Pages/2005-1.aspx
Elevation model prepared by Kaz Shimamura, Geological Survey of Canada
>http://archive.ilmb.gov.bc.ca/crgb/pba/trim/
Topographic dataBC TRIM (2006): British Columbia Terrain Resource Information Mapping (TRIM) Digitial MapProducts; B.C. Ministry of Forests, Lands and Natural Resource Operations, Crown Registryand Geographic Base Branch. URL <
Elevation model dataCanadian Council on Geomatics (2004): Canadian digital elevation data; Natural ResourcesCanada, GeoBase®, URL <[October 2004]
http://www.geobase.ca/geobase/en/data/cded/description.html >
[March 2006]
Related Documents
![Telecommunication Products - Trendtek jointing pits.pdf · [01] UG2006 - P6 Pit UG2007 - P7 Pit UG2008 - P8 Pit UG2900 - P9 Pit UG2001 - P1 Pit UG2002 - P2 Pit UG2003 - P3 Pit UG2004](https://static.cupdf.com/doc/110x72/5a7969077f8b9ab9308d3433/telecommunication-products-jointing-pitspdf01-ug2006-p6-pit-ug2007-p7-pit.jpg)
