Upload
ngodieu
View
216
Download
0
Embed Size (px)
Citation preview
SbAntimonyOpportunities in New South Wales, Australia澳大利亚新南威尔士州矿业投资机遇 – 锑矿
OCT 2014
To Adelaide
MudgeeDUBBO
Wentworth
Cobar
ORANGE
WOLLONGONG
Nyngan
Walgett
Coonamble Gunnedah
Parkes
BrokenHill
Narrabri
Inverell
Young
Cowra
Goulburn
Griffith
NOWRA
Batemans Bay
Narooma
Bega
Cooma
Moree
WAGGAWAGGA
ALBURY
Grafton
Yamba
Ballina
LISMORE
NEWCASTLE
Balranald
Deniliquin
TibooburraLightning Ridge
Eden
BATHURST
PORT MACQUARIE
COFFS HARBOUR
Kempsey
Taree
Muswellbrook
Bourke
TAMWORTH
Armidale
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
New EnglandOrogen
LachlanOrogen
Murray Basin
Delamerian OrogenCurnamonaCraton
Thomson Orogen
Taylors Arm district
Magwood antimony mine
Beilsdown (Wild Cattle Creek)indicated & inferred 1.59 Mt @ 1.29% Sb, 0.16 g/t Au, 360 g/t W
Hillgroveproved & probable2.195 Mt @ 3.8 g/t Au, 2.1% Sbglobal resource 6.25 Mt @ 4.3 g/t Au, 360 g/t W, 1.6 Sb
REFERENCE
Antimony occurrenceAntimony and gold occurrenceOperating mineExport portRailway Major road, sealedMajor road, unsealedGas pipelineGas pipeline, proposed
Hillgrove
200 km
N
Overview
b Antimony usually occurs as stibnite (antimony trisulfide, Sb2S3) with silver and gold commonly obtained in assays of the ore.
b Reduced output from China and increased demand has seen a global price increase during the last five years.
b New South Wales produced 30 000 t of antimony ore, concentrate and metal from 1870 to 1970 and offers potential for further discovery of antimony deposits.
b Antimony occurs in economic concentrations along with Au and W (e.g. Hillgrove).
b Metasedimentary rocks and granites of the New England Orogen host over 500 antimony deposits and occurrences.
b Opportunities for discovery of deposits containing up to tens of thousands of tonnes of antimony occur in the New England Orogen.
Geological setting
Most antimony deposits in New South Wales (NSW) are associated with orogenic deposits which are strongly controlled by regional to district-scale faults, veins and fractures in metasedimentary and felsic igneous rocks.
Hydrothermal solutions are typically ~200–340°C, with higher temperature fluids associated with gold- and tungsten-bearing deposits (e.g. Hillgrove).
Ore typically occurs as quartz–carbonate–stibnite–arsenopyrite veins and in vein selvages.
The New England Orogen hosts numerous small to medium-sized deposits suited to mining of multiple zones.
www.resourcesandenergy.nsw.gov.au
Project highlights
Hillgrove, about 375 km north of Sydney, is the largest antimony resource outside of China, containing (proved & probable) 2.195 Mt @ 3.8 g/t Au, 2.1% Sb; (global resource) 6.25 Mt @ g/t Au, 360 g/t W and 1.6% Sb. The deposit is associated with Permo-Carboniferous granites and Palaeozoic metasedimentary rocks. Mineralisation occurs in veins, breccias, sheeted veins, stockwork and as alteration haloes.
Bielsdown/Wild Cattle Creek: (indicated & inferred) 1.59 Mt @ 1.29% Sb, 0.16 g/t Au, 360 g/t W. Drillhole highlights include 51.2 m @ 1.69% Sb; 1.4 m @ 17.1% Sb, 2.2% WO3; 11.5 m @ 2.32% Sb, 0.34 g/t Au. Mineralisation at Bielsdown is contained within a silicified breccia core hosted by a sub-vertical fault breccia with adjacent metasedimentary rocks.
Magwood Sb mine produced over 3440 t of antimony.
Taylors Arm district produced around 600 t of antimony metal from historical leases.
Striated prismatic crystals of stibnite (antimony trisulphide) in aggregates from the Taylors Arm district. Large stibnite crystal is 8 cm in length.
Source:Lewis P. & Downes P.M. 2008. Mineral systems and processes in New South Wales: a project to enhance understanding and assist exploration. Quarterly Notes of the Geological Survey of New South Wales 128, NSW Department of Primary Industries, Maitland.Robb L. 2004. An Introduction to Ore-Forming Processes. Wiley–Blackwell Publishing.
United States consumption of primary antimony (1999)
Flame retardants 57.4%
Lead acid batteries 4.1%
Plastics stabilisers and catalysts 9.6%
Pigments 8.9%
Ceramics and glass 9.6%
Other uses 9.6%
Source: USGS 2004 http://pubs.usgs.gov/of/2003/of03-019/of03-019.pdf
Surface
Activemetamorphism
Principalcompressivestress (σ1)
MesothermalSb deposit
Dilatantfractures
FluidsDuctile
Mid-crust
Fluids
Brittle
Au–Sbdeposit σ3
Surface water
First order fault zone
Second/thirdorder fault zone
2014_08_0118Model of orogenic gold and antimony deposits showing typical regional to district structural associations. Adapted from Robb (2005) and Lewis and Downes (2008).
Further information
The Advanced Mineral Projects & Exploration Highlights in NSW Map summarises recent exploration activities and ore reserve/resource announcements. This map is updated every six months and is available at www.resourcesandenergy.nsw.gov.au.
Contact: [email protected] | +61 2 4931 6689
Disclaimer: The information contained in this publication is based on knowledge and understanding at time of writing (October 2014). 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 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 State of New South Wales over any equivalent product.