gold opportunities in new south wales€¦ · project name deposit type current resources and...
Post on 12-Jul-2020
1 Views
Preview:
TRANSCRIPT
AuO C TO B E R 2 0 1 9
GoldOpportunities in New South Wales, Australia
To Adelaide
Peak Gold MinesPeak Gold Mines
WoodlawnWoodlawn
DarguesReef
Copper Hill
Commonwealth
Hillgrove
Tomingley Tomingley
DiscoveryRidge
CowalCowal
Drake/Mt Carrington
Cangai
Mt Adrah
McPhillamys
Lewis Ponds
HeraHera
CadiaCadia
Gidginbung
Marsden
Temora
SorpresaPeak HillMineral Hill
Tritton
NorthparkesNorthparkes
New England Orogen
Lachlan Orogen
Thomson Orogen
Murray Basin
Delamerian OrogenCurnamonaProvince
StawellZone
BendigoZone
DUBBO
Wentworth
Cobar
WOLLONGONG
Nyngan
Walgett
Coonamble
Broken Hill
Narrabri
Inverell
Goulburn
Griffith
NOWRA
Batemans Bay
Narooma
Bega
Cooma
Moree
WAGGAWAGGA
ALBURY
GraftonYamba
Ballina
LISMORE
NEWCASTLE
Balranald
Deniliquin
Tibooburra Lightning Ridge
Eden
BATHURST
PORT MACQUARIE
COFFS HARBOUR
Kempsey
Taree
Muswellbrook
Bourke
TAMWORTH
SYDNEY
CANBERRA
A.C.T.
Q U E E N S L A N D
V I C T O R I A
SO
UT
H A
US
TR
AL
I A
REFERENCE
Au occurrence0.5 to 10 t Au*10 to 50 t Au*>50 t Au*Operating mineProjectExport portRailway Major road, sealedMajor road, unsealedGas pipeline
Temora
CadiaCadia
* Total contained commodity
200 km
N
Overview
• New South Wales (NSW) has a gold endowment (past production and identified resources) exceeding 3280 tonnes (t) / 106 million ounces (Moz).
• Gold production is sourced from a variety of mineral deposit types.
• The state remains under-explored, with a range of opportunities for new discoveries.
Deposit types
New South Wales is host to a diverse range of gold deposit types, with gold being produced as either the principal commodity (e.g. Cadia, Cowal) or as a by-product (e.g. Northparkes).
These gold-rich systems include:• Porphyry Cu–Au (Cadia, Northparkes, Copper Hill, Temora
district) and granite-related gold (GRG) (Mt Adrah and Dargues Reef) deposits
• ‘Cobar-type’ (distal intrusion-related Cu–Au) deposits (Peak Gold Mines and CSA) which also may have associated skarn mineralisation (e.g. Hera)
• Orogenic Au (McPhillamys, Hillgrove, Tomingley)• High, intermediate and low sulfidation epithermal Au
systems (Gidginbung, Mineral Hill, Drake)• Gold-rich volcanic associated massive sulfide (VAMS)
deposits such as Woodlawn and Lewis Ponds• Significant gold in some Broken Hill-type (BHT) base metal
systems within the Curnamona Craton.
Gold has also been mined from a diverse range of modern and ancient placer, eluvial and beach deposits and a host of other deposit types where it occurs as a minor commodity.
resourcesandgeoscience.nsw.gov.au
Prospective terranes
Lachlan OrogenThe mainly Ordovician to Carboniferous Lachlan Orogen is generally poorly explored for gold. Recent discoveries (McPhillamys – maiden ore reserve announced September 2017, Tomingley and Hera) highlight the prospectivity of these provinces. Important prospective areas include:• The Macquarie Arc — several belts of volcanic-dominated
rocks of Ordovician to Early Silurian which host approximately 59 Moz of gold including the world class Cadia deposits
• Silurian to Early Devonian rift basins (Hill End Trough, Goulburn Basin, Cobar Basin)
• The Gilmore Fault Zone (a major crustal structure)• The Early Devonian Braidwood Granodiorite.
New England OrogenThe Devonian to Triassic New England Orogen is under-explored by Australian standards. The orogen is host to the Hillgrove orogenic Au–Sb deposit, the Drake epithermal system and the Timbarra and Uralla GRG goldfields.
Other areasThe Stawell and Bendigo zones, which host major gold vein systems in Victoria, are interpreted to extend into southwestern NSW. Similarly, the poorly exposed and poorly understood Thomson Orogen, which extends southwards from Queensland into northwestern NSW, has been little explored.
Other areas where little exploration has been done include the Neoproterozoic to early Palaeozoic Koonenberry Belt, which is now interpreted to be a Cambrian arc built on the rifted margin of Gondwana and the northern extension of the Lachlan Orogen, where it is covered by younger sequences.
Gold endowment (past production + resources) for NSW, classified by deposit typeTotal endowment >3280 t / 106 Moz Current resources >2120 t / 68 Moz
Epithermal
Skarn
VAMS
Orogenic Au
BHT
Porphyry
Granite-related
Alluvial/eluvial
Distal intrusion-related Cu–Au
Orogenic base metal
4.9%
1.4%
14.7%
0.6%
0.3%
2.4%
54.4%
10.8%
1.6%
8.9%
Gold production in New South Wales (1998–2019)
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2018
2019
2017
Tonn
es
Financial year (ending 30 June)
10
0
20
30
40
50
Summary of significant gold resources within NSWMine nameDeposit type Current resources and reserves (JORC)
Contained gold (kg)
Contained gold (Koz)
Cadia Valley OperationsPorphyry Cu–Au
Cadia East: (total resource) 2900 Mt @ 0.36 g/t Au, 0.26% CuCadia East: (probable) 1400 Mt @ 0.47 g/t Au, 0.30% Cu
1 057 518 34 000
CowalEpithermal
(total resource) 240.6 Mt @ 0.96 g/t Au(proved & probable) 141.3 Mt @ 0.85 g/t Au
23 0632 7415
HeraSkarn
(total resource) 2.061 Mt @ 1.8 g/t Au, 2.8% Pb, 4.2% Zn, 34 g/t Ag(probable) 1.577 Mt @ 1.9 g/t Au, 3.0% Pb, 4.5% Zn, 34 g/t Ag
3092 99
NorthparkesPorphyry Cu–Au
(total resource) 471.81 @ 0.19 g/t Au, 0.56% Cu(proved & probable) 125.74 Mt @ 0.20 g/t Au, 0.57 % Cu
94 362 3034
Peak Gold MinesDistal intrusion-related Cu–Au
(total resource) 14.210 Mt @ 1.5 g/t Au, 1.4% Cu, 0.9% Pb, 1.1% Zn, 9 g/t Ag(proved & probable) 2.834 Mt @ 2.0 g/t Au, 1.1% Cu, 1.8% Pb, 1.9% Zn, 15 g/t Ag
21 315 685
TomingleyOrogenic Au
Tomingley open pit: (total resource) 5.075 Mt @ 1.5 g/t AuTomingley open pit: (proved & probable) 0.677 Mt @ 0.7 g/t AuTomingley underground: (total resource) 1.364 Mt @ 3.8 g/t AuTomingley underground: (proved & probable) 0.732 Mt @ 3.1 g/t Au
12 658 407
WoodlawnVAMS
Underground: (measured & indicated) 4.5 Mt @ 6.5 % Zn, 2.0% Cu, 2.4% Pb, 0.5 g/t Au, 51 g/t Ag
Underground: (inferred) 2.9 Mt @ 5.2% Zn, 1.8% Cu, 2.0% Pb, 0.5 g/t Au, 40 g/t AgUnderground: (proved & probable) 3.1 Mt @ 5.2 % Zn, 1.6%Cu, 1.8 % Pb, 0.4 g/t Au,
38 g/t AgReclaimed tailings: (measured & indicated) 9.8 Mt @ 2.2% Zn, 0.5% Cu, 1.3% Pb,
0.3 g/t Au, 32, g/t AgReclaimed tailings: (inferred) 1.1 Mt @ 2.3% Zn, 0.5% Cu, 1.2% Pb, 0.3 g/t Au,
27 g/t AgReclaimed tailings: (proved & probable) 9.3 Mt @ 2.2% Zn, 0.5% Cu, 1.3% Pb,
0.3 g/t Au, 31 g/t Ag
6970 224
Project nameDeposit type
Cadia Valley OperationsPorphyry Cu–Au
Ridgeway: (total resource) 150 Mt @ 0.52 g/t Au, 0.33% CuRidgeway: (probable) 80 Mt @ 0.54 g/t Au, 0.28% Cu (care and maintenance)Other: (total resource) 120 Mt @ 0.37 g/t Au, 0.20% CuOther: (proved & probable) 86 Mt @ 0.53 g/t Au, 0.15% Cu
207 948 3900
CangaiGranite-related Au
(inferred): 3.2 Mt @ 3.35% Cu, 0.8 g/t Au, 20.17 g/t Ag, 0.37% Zn, 0.005% Co 2560 82
CommonwealthVAMS
(inferred) 0.912 Mt @ 2.4 g/t Au, 44 g/t Ag, 1.2% Zn, 0.5% Pb, 0.08% Cu 2189 70
Copper HillPorphyry Cu–Au
(indicated & inferred) 87 Mt @ 0.36% Cu, 0.32 g/t Au 27 840 895
Dargues ReefGranite-related
(total resource) 1.59 Mt @ 6.8 g/t Au 10 182 348
Discovery RidgeOrogenic Au
(total resource) 10.4 Mt @ 1.17 g/t Au(proved & probable) 1.17 Mt @ 5.73.8 g/t Au
12 168 391
Drake/Mt CarringtonEpithermal
Mt Carrington Strauss & Kylo: (indicated & inferred) 4.5 Mt @ 1.5 g/t Au, 1.6 g/t Ag (gold-rich zones)
Mt Carrington Red Rock & Guy Bell: (indicated & inferred) 1.79 Mt @ 1.2 g/t Au, 3.6 g/t Ag (gold-rich zones)
Mt Carrington Lady Hampden, White Rock: (indicated) 3.54 Mt @ 0.3 g/t Au, 73 g/t Ag (silver-rich zones)
Mt Carrington Lady Hampden, White Rock, White Rock North & Silver King: (inferred) 8.95 Mt @ 0.1 g/t Au, 51 g/t Ag (silver-rich zones)
10 855 349
GidginbungEpithermal
Gidginbung: (inferred) 8 Mt @ 1.5 g/t Au, 0.09% Cu 12 000 386
HillgroveOrogenic Au
(total resource) 2.8 Mt @ 5.1 g/t Au, 1.7% Sb(proved & probable) 2.195 Mt @ 3.8 g/t Au, 2.1% Sb
14 280 459
Lewis PondsVAMS
(indicated & inferred) 20.24 Mt @ 0.5 g/t Au, 33 g/t Ag, 1.5% Zn, 0.7% Pb, 0.1% Cu 10 120 325
MarsdenPorphyry Cu–Au
(indicated & inferred) 122.97 Mt @ 0.27 g/t Au, 0.46% Cu(probable) 65.17 Mt @ 0.39 g/t Au, 0.57% Cu
33 202 1067
McPhillamysOrogenic Au
(indicated & inferred) 69.8 Mt @ 1.02 g/t Au(probable) 60.8 Mt @ 1.04 g/t Au
71 196 2289
Table continued on back.
MI
NE
SP
RO
JE
CT
S
resourcesandgeoscience.nsw.gov.au
Project nameDeposit type Current resources and reserves (JORC)
Contained gold (kg)
Contained gold (Koz)
Mineral HillEpithermal
Pearse (oxide & sulfide): (measured & indicated) 0.298 Mt @ 6.9 g/t Au, 80 g/t AgPearse (oxide & sulfide): (proved & probable) 0.235 Mt @ 6.9 g/t Au, 71.7 g/t AgPearse North: (total resource) 0.298 Mt @ 2.7 g/t Au, 26 g/t AgPearse North: (proved & probable) 0.179 Mt @ 2.5 g/t Au, 21 g/t AgSouthern Ore Zone: (total resource) 1.985 Mt @ 1.2% Cu, 1.4% Pb, 1.1% Zn, 1.8 g/t Au,
19 g/t AgRed Terror: (total resource) 0.186 Mt @ 1.7% Cu, 0.1% Pb, 0.3% Zn, 2.2 g/t Ag, 2.4 g/t Au
6761 216
Mt AdrahGranite-related Au
(indicated & inferred) 20.5 Mt @ 1.1 g/t Au 22 550 770
Peak HillEpithermal
Proprietary underground: (inferred) 1.02 Mt @ 3.29 g/t Au, 0.15 % Cu 3356 108
SorpresaEpithermal
(indicated & inferred) 6.4 Mt @ 0.61 g/t Au, 38 g/t Ag 3940 127
Temora ProjectPorphyry Cu–Au
Dam: (indicated & inferred) 40 Mt @ 0.30% Cu, 0.41 g/t AuCullingerai: (inferred) 24 Mt @ 0.30 % Cu, 0.31 g/t AuEstori: (inferred) 14 Mt @ 0.21 % Cu, 0.35 g/t AuMandamah: (inferred) 26 Mt @ 0.34 % Cu, 0.38 g/t AuYiddah: (inferred) 127 Mt @ 0.32 % Cu, 0.14 g/t Au
68 669 2208
Note: Project totals for contained gold are based on combined resources.
Top: Wetlands near Cowal gold mine.
Bottom left: Free gold in drillcore from Cadia East.
Bottom right: Copper gold ore with quartz veins, chalcopyrite and bornite from underground at Ridgeway mine near Cadia.
PR
OJ
EC
TS
Contact: mra.info@geoscience.nsw.gov.au | +61 2 4063 6500Disclaimer: The information contained in this publication is based on knowledge and understanding at time of writing (October 2019), using publicly available information. Because of advances in knowledge, users are reminded of the need to ensure that information upon which they rely is up to date. The information contained in this publication may not be or may no longer be aligned with government policy nor does the publication indicate or imply government policy. No warranty about the accuracy, currency or completeness of any information contained in this document is inferred (including, without limitation, any information in the document provided by third parties). While all reasonable care has been taken in the compilation, to the extent permitted by law, the State of New South Wales (including the NSW Department of Planning, Industry and Environment) exclude all liability for the accuracy or completeness of the information, or for any injury, loss, or damage whatsoever (including without limitation liability for negligence and consequential losses) suffered by any person acting, or purporting to act, in reliance upon anything contained herein. Users should rely upon their own advice, skills, interpretation and experience in applying information contained in this publication. The product trade names in this publication are supplied on the understanding that no preference between equivalent products is intended and that the inclusion of a product name does not imply endorsement by the Department over any equivalent product.
top related