DOCSLIB.ORG

OZ Minerals Carrapateena Project Feasibility Study Update

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

CARRAPATEENA Feasibility Study Update CA-MAN-REP-1000 24 August 2017 CA-MAN-REP-1000 Carrapateena Feasibility Study Update Carrapateena SLC FS Update / Doc # CA-MAN-REP-1000 Page 2 of 130 CA-MAN-REP-1000 Carrapateena Feasibility Study Update ACKNOWLEDGEMENTS Kokatha Aboriginal Corporation The Kokatha People have a direct, unbroken and unique relationship with the land on which the Carrapateena Project is located. OZ Minerals recognises the sense of place and belonging of the Kokatha People is linked to their identity, creation stories, travel, trade, ceremonies, family and places held sacred. We recognise the deep and ongoing feelings of relationship and attachment they hold for their lands. OZ Minerals acknowledges the Kokatha People’s connection to ‘country’, the contribution of the Kokatha People to their region and the enduring importance to the Kokatha People of values, cultural authority, cultural norms and customary laws. OZ Minerals places great value on our relationship with the Kokatha People. OZ Minerals and the Kokatha Aboriginal Corporation seek to work in partnership, as equals, to further develop the Partnering Agreement Nganampa palyanku kanyintjaku ‘Keeping the future good for all of us’. This collaborative agreement encapsulates, recognises and values the ongoing contribution of both partners, and will inform the relationship between the Kokatha People and OZ Minerals throughout and beyond the development of the Carrapateena Project. Pernatty and Oakden Hills Station Owners The Far North region of South Australia has a long and rich history of pastoralism. The proposed Carrapateena Project is located on Pernatty Station and the proposed supporting infrastructure is located within Oakden Hills Station. OZ Minerals recognises the importance of the land to its owners and their operations and acknowledges their cooperation in developing the Project. An ongoing relationship between pastoral owners and OZ Minerals will continue to be fostered. This will ensure development of mutual benefits for both parties as a result of the co-existence of pastoral enterprises and mining operations throughout the course of the mine life. Carrapateena SLC FS Update / Doc # CA-MAN-REP-1000 Page 3 of 130 CA-MAN-REP-1000 Carrapateena Feasibility Study Update DISCLAIMER The Carrapateena Project is still in a state of development, therefore the information in this document and conclusions presented should be viewed in this light. OZ Minerals and its Advisors have used reasonable endeavours to ensure this document is based on information that was current as of the date of the document. Statements contained in this document represent the reasonable judgments of OZ Minerals based on the information available at the time of preparation. OZ Minerals has relied on information provided by third parties (Information Providers) to produce this document and have not verified information provided by the Information Providers (unless specifically noted otherwise). OZ Minerals does not assume any responsibility or make any representations with respect to the adequacy, accuracy or completeness of such information. No responsibility is assumed for inaccuracies in reporting by the Information Providers or for inaccuracies in any other data source whether provided in writing or orally used in preparing or presenting the document. This document includes ‘forward-looking statements’. These statements relate to expectations, beliefs, intentions or strategies regarding the future. These statements may be identified by the use of words like ‘anticipate,’ ‘believe,’ ‘estimate,’ ‘expect,’ ‘intend,’ ‘may,’ ‘plan,’ ‘project,’ ‘will,’ ‘should,’ ‘seek,’ and similar expressions. The forward-looking statements reflect views and assumptions with respect to future events as of the date of this document and are subject to future conditions, and other risks and uncertainties, including but not limited to economic and political conditions and sovereign risk. Any forward-looking statements are subject to various risk factors that could cause the Project’s actual results to differ materially from the results expressed or anticipated in these statements. Such statements are not guarantees of future performance and involve known and unknown risks, uncertainties, assumptions and other important factors (including the risks set out in Section 11), many of which are beyond the control of OZ Minerals and its directors and management. Forward-looking statements should therefore be read in conjunction with, and are qualified by reference to, risk factors as set out in Section 11, general assumptions, specific assumptions, the sensitivity analysis and other information in this document. OZ Minerals do not give any assurance that the results, performance or achievements expressed or implied by the forward-looking statements contained in this document will actually occur and investors are cautioned not to place undue reliance on these forward- looking statements. OZ Minerals has no intention of updating or revising forward-looking statements, or publishing prospective financial and production information in the future, regardless of whether new information, future events or any other factors affect the information, contained in this document, except where required by law and which may affect the findings or projections contained in this document. All sections in this document should be viewed in the context of the entire document including, without limitation, any assumptions made or qualifications and statements of limitation contained in it, including this disclaimer. COPYRIGHT Copyright © OZ Minerals Carrapateena Pty Ltd and OZM Carrapateena Pty Ltd, 2017 All rights reserved This document and any related documentation is protected by copyright owned by OZ Minerals Carrapateena Pty Ltd and OZM Carrapateena Pty Ltd. Use or copying of this document or any related documentation, in whole or in part, without the written permission of OZ Minerals Carrapateena Pty Ltd and OZM Carrapateena Pty Ltd constitutes an infringement of its copyright. Carrapateena SLC FS Update / Doc # CA-MAN-REP-1000 Page 4 of 130 CA-MAN-REP-1000 Carrapateena Feasibility Study Update Carrapateena SLC FS Update / Doc # CA-MAN-REP-1000 Page 5 of 130 CA-MAN-REP-1000 Carrapateena Feasibility Study Update TABLE OF CONTENTS 1 INTRODUCTION ....................................................................................................................................................... 11 1.1 Purpose and scope ......................................................................................................................................................... 11 1.2 Overview .............................................................................................................................................................................. 11 1.3 Project Background ........................................................................................................................................................ 14 1.4 Study Objectives .............................................................................................................................................................. 17 1.5 Study Outcomes............................................................................................................................................................... 18 1.5.1 Major Work Packages .................................................................................................................................. 18 1.5.2 Verification of Key PFS Assumptions..................................................................................................... 20 1.5.3 Mine Plan Update .......................................................................................................................................... 21 2 RESOURCE AND RESERVE .................................................................................................................................... 22 2.1 Geology and Mineralisation ........................................................................................................................................ 22 2.2 Mineral Resource Estimate .......................................................................................................................................... 24 2.3 Ore Reserve ........................................................................................................................................................................ 24 2.4 Life of Mine Plan .............................................................................................................................................................. 25 2.5 Mineralised Grade Shells .............................................................................................................................................. 25 2.6 Regional Mineralisation ................................................................................................................................................ 29 3 MINING METHOD ................................................................................................................................................... 32 3.1 Geotechnical Background ............................................................................................................................................ 32 3.1.1 Caveability Assessment ..............................................................................................................................
Recommended publications
  • AMSC's STATCOM System: a Power Quality Gold Mine for Prominent Hill

    AMSC's STATCOM System: a Power Quality Gold Mine for Prominent Hill

    AMSC’s STATCOM System: A Power Quality Gold Mine for Prominent Hill Photo Courtesy of OZ Minerals A Case Study by AMSC • September 2013 The Background Classified as a Flexible AC Transmission Systems (FACTS) In 2001, a significant copper-gold deposit was discovered device, AMSC’s D-VAR® STATCOM approximately 650 kilometers northwest of Adelaide, the utilizes the company’s proprietary capital city of South Australia. In 2005, this site was acquired and advanced control and by OZ Minerals Limited, which launched the Prominent Hill monitoring algorithms that detect mining operation. To date, the company has invested over and instantaneously compensate $1.2 billion (AUS) to create a mine with a capacity of for voltage disturbances by 100,000 tons of copper and 115,000 ounces of gold in injecting leading or lagging concentrates a year. The mine has become an important reactive power (VARs) precisely supplier of precious metals, but it also has become a when and where it is needed. The reactive power is generated showcase for power quality solutions by virtue of its use by AMSC’s proprietary four- of AMSC’s STATCOM D-VAR® system. Courtesy of OZ Minerals quadrant IGBT inverters that are The Problem capable of fully injecting capacitive or inductive VARs in one line The OZ Minerals copper concentrator uses high-powered electrical crushing, grinding and flotation cycle. The system’s full dynamic equipment. The plant’s peak demand can be as high as 35 megawatt (MW), depending on shift capability of 3 times its rated production. As a consequence of the large individual motor loads at the plant and the output can be provided for up characteristics of the local grid, OZ Minerals early on sought electrical engineering studies to to two seconds.
  • A Modern Mining Company a Modern Mining Company

    A Modern Mining Company a Modern Mining Company

    ANNUAL REPORT 2013 OZ MINERALS LIMITED ABN 40 005 482 824 A MODERN MINING COMPANY A MODERN MINING COMPANY 2 2013 Snapshot 3 Chairman and CEO’s Review 4 Prominent Hill 6 Carrapateena 7 Sustainability 8 Resources and Reserves 12 Corporate Governance Statement 19 Results for Announcement to the Market 20 Directors’ Report 28 Operating and Financial Review 47 Remuneration Overview and Report 68 Consolidated Financial Statements 123 Shareholder Information IBC Contact Details/Annual General Meeting OZ Minerals is an Australian based modern mining company with a focus on copper. OZ Minerals owns the Prominent Hill copper-gold mine and Carrapateena copper-gold project, both situated in South Australia. OZ Minerals’ strategy is based on delivering superior shareholder returns built upon a foundation of Governance and Zero Harm, with the following five key elements: a focus on copper, maximising current assets, building a project pipeline, investing in exploration and exercising disciplined capital management. With an experienced team, a strong balance sheet and quality assets, OZ Minerals is well positioned for the future. 1 2013 SNAPSHOT › Prominent Hill production of 73,362 tonnes of copper and 128,045 ounces of gold. › 2014 production guidance of 75,000 to 80,000 tonnes of copper and 130,000 to 140,000 ounces of gold. Production outlook guidance announced until 2018. › Successful first full year of production from the Ankata Underground mine, with 1.2 million tonnes of ore mined. › Strong cash balance of $364 million at 31 December 2013 with undrawn debt facilities of US$200 million. › Board approval to proceed with the development of the Malu Underground mine, with first ore expected in late 2014, extending Prominent Hill mine life.
  • For Personal Use Only Use Personal for North, Central and South America

    For Personal Use Only Use Personal for North, Central and South America

    7 July 2011 NEW EXECUTIVE APPOINTMENTS Perilya Limited (ASX: PEM) today announced the appointments of Mr Minzhi Han as the Company’s new General Manager, Metals Marketing and Ms Fran Burgess in the Company’s newly created role of General Manager, Projects & Group Metallurgy. General Manager, Metals Marketing Perilya is pleased to announce the appointment of Mr Minzhi Han as the Company’s new General Manager, Metals Marketing. Prior to the appointment today, Mr Han has served the Company as a Non-Executive Director having been appointed by shareholders at a general meeting held on 5 February 2009. As a consequence of his new appointment, Mr Han will now become an Executive Director of the Company and will relocate from Shenzhen, China to Perth, Western Australia. He will also relinquish his role on the Company’s Audit & Risk Management Committee in accordance with the Company’s Corporate Governance policies. Mr Han’s remuneration package has been set at a level commensurate with those of the Company’s other executive General Managers. He receives no additional remuneration for his services as a Director of the Company. Mr Han is a senior commercial executive in the base metal industry with over 23 years of experience in marketing and trading base metals and base metal concentrates, with particular focus in zinc and lead metals and concentrates. Prior to the appointment, Mr Han was the General Manager of the Commercial Department of Shenzhen Zhongjin Lingnan Nonfemet Company Ltd. (Zhongjin Lingnan) with responsibility for marketing and trading primarily lead and zinc metals and concentrates. He was also responsible for hedging and derivative trading at Zhongjin Lingnan.
  • 2020 Positive Prominent Hill Deep Drilling Results

    2020 Positive Prominent Hill Deep Drilling Results

    16 NOVEMBER 2020 Positive Prominent Hill deep drilling results . Assays complete from seven underground diamond holes drilled below the existing Prominent Hill Mineral Resource testing deep extensions. Significant results from this program include (uncut and true widths): o PH20RD7538: . 11.1m @ 1.2 percent copper, 1.1 grams per tonne gold . 13.2m @ 0.9 percent copper, 1.1 grams per tonne gold o PH20RD7594: . 31.5m @ 1.1 percent copper, 1.3 grams per tonne gold o PH20RD7597: . 18m @ 0.9 percent copper, 1.3 grams per tonne gold o PH20RD7601: . 50.1m @ 1.2 percent copper, 0.8 grams per tonne gold o PH20RD7604: . 10.4m @ 1.1 percent copper, 0.8 grams per tonne gold . 35.5m @ 1.3 percent copper, 0.4 grams per tonne gold . 10.9m @ 0.7 percent copper, 0.1 grams per tonne gold . 20.1m @ 1.2 percent copper, 0.4 grams per tonne gold . 13.8m @ 1.5 percent copper, 0.3 grams per tonne gold OZ Minerals carried out a drilling program in 2020 targeting extensions of the existing Mineral Resource at vertical depths of >1100 metres below the surface. The purpose of the program was to establish the potential for deep mineralisation that may have an impact on the Prominent Hill Expansion decision. Drilling was carried out throughout the year from the 9531 Level Drill Platform. The completed assays for the latest diamond holes, designed to test the down dip extension of mineralisation below the Malu Resource area, have highlighted that mineralisation exists at depth OZ Minerals Limited | ABN: 40 005 482 824 | 2 Hamra Drive, Adelaide Airport, South Australia 5950 T: +61 8 8229 6600 | F: +61 8 8229 6601 | [email protected] | www.ozminerals.com below the current 2020 Prominent Hill Mineral Resources1 (see Figures 1, 2 and Appendix 2).
  • Prominent Hill Mineral Resource and Ore Reserve Statement As at 30

    Prominent Hill Mineral Resource and Ore Reserve Statement As at 30

    OZ Minerals Limited Prominent Hill 2018 Mineral Resource and Ore Reserve Statement and Explanatory Notes As at 30 June 2018 TABLE OF CONTENTS PROMINENT HILL MINERAL RESOURCE STATEMENT AS AT 30 June 2018 ................................................. 4 Summary ............................................................................................................................................. 4 Setting ................................................................................................................................................. 6 Changes in the June 2018 Mineral Resource Estimate ......................................................................... 7 JORC CODE, 2012 EDITION, TABLE 1 .................................................................................................. 10 Section 1 Sampling Techniques and Data ........................................................................................... 10 Section 2 Reporting of Exploration Results......................................................................................... 14 Section 3 Estimation and Reporting of Mineral Resources ................................................................. 15 Competent Person’s Statement ......................................................................................................... 20 Contributors ...................................................................................................................................... 20 PROMINENT HILL ORE RESERVE STATEMENT AS AT 30 June 2018
  • Research Collection

    Research Collection

    Research Collection Journal Article Hematite-breccia Hosted Iron Oxide Copper-Gold Deposits Require Magmatic Fluid Components Exposed to Atmospheric Oxidation: Evidence from Prominent Hill, Gawler Craton, South Australia Author(s): Schlegel, Tobias U.; Wagner, Thomas; Wälle, Markus; Heinrich, Christoph A. Publication Date: 2018-05-01 Permanent Link: https://doi.org/10.3929/ethz-b-000267650 Originally published in: Economic Geology 113(3), http://doi.org/10.5382/econgeo.2018.4564 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use. ETH Library This is the Green Open Access version of: Schlegel, T. U., Wagner, T., Wälle, M., and Heinrich, C. A., 2018. Hematite-breccia hosted iron oxide–copper–gold deposits require magmatic fluid components exposed to atmospheric oxidation: Evidence from Prominent Hill, Gawler craton, South Australia. Economic Geology, v. 113, p. 597-644. Original publication see: https://doi.org/10.5382/econgeo.2018.4564 Hematite-breccia hosted iron oxide–copper–gold deposits require magmatic fluid components exposed to atmospheric oxidation: Evidence from Prominent Hill, Gawler craton, South Australia Tobias U. Schlegel1,*, Thomas Wagner2, Markus Wälle1,# and Christoph A. Heinrich1,3 1Institute of Geochemistry and Petrology, ETH Zürich, 8092 Zürich, Switzerland 2Institute of Applied Mineralogy and Economic Geology, RWTH Aachen University, Germany 3Also at: Faculty of
  • 2018 Review of the Woomera Prohibited Area Coexistence Framework Submission from the South Australian Government September 2018

    2018 Review of the Woomera Prohibited Area Coexistence Framework Submission from the South Australian Government September 2018

    2018 Review of the Woomera Prohibited Area Coexistence Framework Submission from the South Australian Government September 2018 Executive Summary Mining, primary industries and Defence industries are critical foundations of South Australia's economic success, fuelling the prosperity and well-being of communities across the State, particularly the development of regional centres, rural towns and rail, road and coastal infrastructure. The Woomera Prohibited Area (WPA) is significant to all these three industries, and to traditional owners who use the WPA for cultural and traditional activities. The WPA is an important region for generating economic opportunities to assist South Australian Government achieve its commitment of creating more jobs and increasing exports especially for the Far North outback region. The convergence of three major industries in the WPA provides significant opportunities for regional economic growth, employment, skills training and capacity development, and investment in regional infrastructure. The South Australian Government recognises the WPA is a significant national security asset, and the WPA Coexistence Framework, implemented in 2011, must maintain the primacy of Defence use and the protection of Australia’s national security, whilst balancing the needs of other land users. This submission supports the intent of the 2018 Review of the WPA Coexistence Framework (2018 WPA Review) to deliver a contemporary coexistence framework that recognises and manages varied land uses and interests including those of Defence, mineral exploration and mining, pastoral operations, traditional land ownership, and other national security and economic interests. The current WPA coexistence framework has operated well and is an example of a model based on multiple land use principles.
  • 12 Groundwater 12

    12 Groundwater 12

    GROUNDWATER 12 12.1 INTRODUCTION and the potential impact on users of the groundwater resources 12 and other sensitive receptors. Olympic Dam is located in an area of low rainfall, low rates of groundwater flow and recharge, and low topographic relief. No groundwater affecting activities would occur as a result of As a consequence, most groundwater within 50 km or more of construction or operation of the proposed concentrate handling the current operation is saline (i.e. salty) and little-used. facilities at the Port of Darwin. These facilities would be Olympic Dam currently uses less than 1 ML/d of local constructed within the reclaimed area of the East Arm where groundwater for dust suppression, and there are three known groundwater is not naturally occurring. Consequently, the local shallow groundwater wells within 50 km that use saline and regional groundwater systems of the Darwin area are not groundwater for stock (all three are within pastoral leases held discussed here. Information relating to the risk to groundwater by BHP Billiton). from accidental spills or leaks is discussed in Appendix E4. The primary water supply for the existing Olympic Dam Groundwater in the vicinity of the desalination plant would not operation is groundwater extracted from Wellfields A and B be used and the proposed expansion would not affect the located in the Great Artesian Basin (GAB), about 120 and natural interactions between groundwater and seawater. 200 km north of Olympic Dam, respectively. These wellfields supply an average of 37 ML/d to the existing operation. The The potential for, and implications of, water accumulating in extraction of groundwater is monitored extensively to the bottom of the open pit after mine closure are discussed demonstrate compliance with licence conditions and to prevent in Chapter 11, Surface Water.
  • Prominent Hill Underground Reserve Growth Continues, Mine Life Extended to 2029

    Prominent Hill Underground Reserve Growth Continues, Mine Life Extended to 2029

    21 NOVEMBER 2017 Prominent Hill underground Reserve growth continues, mine life extended to 2029 18 per cent growth in underground Ore Reserve to 39Mt @ 1.7% copper equivalenti extends Prominent Hill mine life to 2029 Stockpile growth to 27Mt @ 0.8% copper equivalentii Plant to operate at full capacity to 2023 with strong cash flow generation following open pit closure in Q1 2018 Highlights of the Prominent Hill Mineral Resource and Ore Reserve estimate at 30 June 2017*: Tonnes Cu Au Ag Cu Au Ag Increase / Category (estimated) (Mt) (%) (g/t) (g/t) (kt) (koz) (Moz) Decrease Total copper Mineral Resourceiii 140 1.2 0.5 3 1600 2500 13 5% Total Ore Reserve 74 1.0 0.6 3 730 1500 7 1% Underground Ore Reserve 39 1.4 0.6 3 540 760 4 18% Proved copper stockpiles 12 0.8 0.4 2 93 170 1 71% Proved gold stockpiles 15 0.1 0.8 2 17 380 1 15% Decreases in copper and gold Mineral Resources and Ore Reserves were due to mining depletion from both the Prominent Hill open pit and the Prominent Hill underground. Underground: An 18 per cent increase in underground Ore Reserve to 39Mt has enabled an expected underground production rate of 3.5-4.0Mtpa from 2019 to continue through to 20291. Underground Ore Reserve copper and gold metal has increased by ~13 and ~27 per cent respectively, driven by increased confidence in the Mineral Resource estimate, improved design inputs and lateral (across and along strike) mining area expansions. Stockpiles: Stockpiles grew by ~35 per cent to 27Mt, with copper metal up ~67 per cent and gold metal up ~34 per cent.
  • Yokogawa Mining and Metals Processing Capability All Material Copyright Yokogawa 2013 Yokogawa Mining and Metals Processing Capability

    Yokogawa Mining and Metals Processing Capability All Material Copyright Yokogawa 2013 Yokogawa Mining and Metals Processing Capability

    Yokogawa Mining and Metals Processing Capability All material copyright Yokogawa 2013 Yokogawa Mining and Metals Processing Capability Contents Coal 3 Copper 5 Gold 7 Iron ore 11 Mineral Sands 13 Nickel 15 Uranium 17 Zinc, lead & silver 19 Coal C Uses: For coking coal in steel making and power generation Factors influencing demand: Steel production and electricity demand Yokogawa’s involvement with coal We have control systems in these mines Integra Coal Oaky Creek Integra Coal Yokogawa Instrument Users The Vale coal mine is located in the Hunter Valley of Anglo Coal’s Capcoal mine – Bowen Basin Qld NSW. It is owned by the Brazilian mining company, – AXF flow meters and EJX pressure transmitters Vale. It is both an open cut and underground mine producing 4.5mtpa of semi hard coking coals. Anglo Coal’s Dawson mine – Bowen Basin Qld A Centum CS3000 production control system – AXF flow meters, EJX transmitters, Rotamass and Exaquantum plant information system are used Anglo Coal’s Moranbah North – Bowen Basin to control the wash plant. FA-M3 PLC controllers are – AXF flow meters and analytical products used at the coal preparation plant, the stackers and Yancoal’s Austar Coal mine – Hunter Valley reclaimers. – EJX transmitters, analytical products The mine also uses Yokogawa AXF flow meters and EJX transmitters. BHP Billiton’s BMA – Bowen Basin Qld – AXF flow meters, EJX transmitters Oaky Creek GlencoreXstrata’s Bulga mine – Hunter Valley NSW The Oaky Creek mine is located in the Bowen Basin – AXF flow meters in Queensland. Its majority owner is GlencoreXstrata. Caledon Coal – Bowen Basin Qld It produces premium quality medium volatile coking - AXF flow meters, EJX transmitters coals from 2 underground mining operations.
  • Prominent Hill Mineral Resource & Ore Reserve Statement

    Prominent Hill Mineral Resource & Ore Reserve Statement

    OZ Minerals Limited PROMINENT HILL Mineral Resource and Ore Reserve Statement and Explanatory Notes As at 31 March 2021 Prominent Hill Mineral Resource and Ore Reserve Statement and Explanatory Notes As at 31 March 2021 SUMMARY The March 2021 Prominent Hill Mineral Resource and Ore Reserve estimates are presented in Tables 1 and 2. The Mineral Resource is inclusive of the Ore Reserve. Numbers in the tables have been rounded. Table 1: Mineral Resource Estimate as at 31 March 2021 Prominent Hill Category Tonnes CuEq Cu Au Ag Cu Au Ag (Mt) (%)1 (%) (g/t) (g/t) (kt) (koz) (Moz) Underground Measured 42 1.7 1.3 0.6 3 540 840 4 2 $49/t NSR cut-off Indicated 41 1.5 0.9 0.9 3 380 1,200 4 envelope3 Inferred 51 1.4 0.9 0.9 2 450 1,500 4 Sub-Total 140 1.5 1.0 0.8 3 1,400 3,500 10 Surface Stocks - Copper4 Measured 2.6 0.7 0.5 0.4 2 13 29 0.1 Surface Stocks - Gold4 Indicated 10 0.5 0.1 0.6 0.4 11 210 0.1 Surface Stocks - Marginal4 Indicated 2.7 0.4 0.2 0.3 0.5 4.3 30 0.05 Surface Stocks4 Sub-Total 16 0.5 0.2 0.5 0.6 28 260 0.3 Total Measured 45 1.6 1.2 0.6 3 550 870 5 Indicated 54 1.2 0.7 0.8 2 400 1,400 4 Inferred 51 1.4 0.9 0.9 2 450 1,500 4 Total 150 1.4 0.9 0.8 2 1,400 3,800 10 Table 2: Ore Reserve Estimate as at 31 March 2021 Prominent Hill Category Ore CuEq Cu Au Ag Cu Au Ag (Mt) (%)1 (%) (g/t) (g/t) (kt) (koz) (Moz) Underground - LOM Proved 26 1.7 1.3 0.6 3.2 340 510 3 Probable 8 1.4 0.8 1.0 2.5 70 280 1 Sub-Total 34 1.6 1.2 0.7 3.0 400 780 3 Underground - PHOX Proved 0 0.0 0.0 0.0 0.0 0 0 0 Probable 13 1.5 1.1 0.6 3.1 150 240 1 Sub-Total 13
  • Olympic Dam Expansion Assessment Report EPBC 2005/2270

    Olympic Dam Expansion Assessment Report EPBC 2005/2270

    Olympic Dam expansion assessment report EPBC 2005/2270 Current Olympic Dam operation (photo: BHP Billiton) September 2011 Contents 1. Project description............................................................................................................... 1 2. Background ......................................................................................................................... 2 3. Preparation of assessment report ....................................................................................... 3 4. Approach to condition setting .............................................................................................. 4 5. Assessment of impacts on the environment ........................................................................ 4 5.1 Mining and processing activities ....................................................................................... 5 5.1.1 Introduction ............................................................................................................ 5 5.1.2 Radiation ................................................................................................................ 6 5.1.3 Regional groundwater impacts ............................................................................. 10 5.1.4 Local groundwater impacts .................................................................................. 14 5.1.5 Impacts on flora and fauna................................................................................... 16 5.1.6 Air quality ............................................................................................................