2007 Announcements
20 December, 2007
The purpose of the issue is to allow the Company to pursue its objective of consolidating its unique position as the premier silver focused company in Australia. This will be done by upgrading of the Twin Hills Silver Mine as well as undertaking exploration and acquisition activities to increase the silver resource base of the Company. The attached initial advice to shareholders and optionholders contains further details and will be mailed to each shareholder and optionholder on 21 December 2007. An Appendix 3B in respect of the issue is also attached. Yours faithfully,
Garry M. Edward
INITIAL ADVICE OF NON-RENOUNCEABLE RIGHTS ISSUE
The purpose of the issue is to allow the Company to pursue its objective of consolidating its unique position as the premier silver focused company in Australia. This will be done by upgrading of the Twin Hills Silver Mine as well as undertaking exploration and acquisition activities to increase the silver resource base of the Company. The Entitlements Issue Macmin is making a non-renounceable Entitlements Issue of up to approximately 92.4 million fully paid ordinary shares at 20 cents per New Share. Every two New Shares will be accompanied by a free New Option exercisable at 25 cents on or before 30 October 2008. If fully subscribed, the Issue will raise up to a maximum of approximately $18.5 million. The offer does not require shareholder approval. Shareholders registered or entitled to be registered at 5pm Australian Eastern Standard Time on 3 January 2008 are offered 1 New Share for every 5 Shares then held, at an issue price of 20 cents per New Share. The “ex” date for entitlements is 27 December 2007, therefore shares purchased after 27 December 2007 will not provide the buyer with entitlements in the Issue. Where fractions arise in the calculation of entitlements, they will be rounded up to the next whole number of New Shares. Entitlements will be shown on the personalised Entitlement and Acceptance Form which will accompany the Prospectus when it is mailed to shareholders. Shareholders may apply for New Shares and New Options in excess of their entitlements. The New Shares and New Options will rank equally in all respects from the date of issue with existing ordinary securities (MMN) and quoted options (MMNO) respectively. There are no entitlements to New Shares for options currently held. An Optionholder who exercises options and becomes registered as the holder of the shares issued on exercise of the options by 5pm on 3 January 2008 will be entitled to participate in the Entitlements Issue in respect of those shares. A Prospectus detailing the non-renounceable Entitlements Issue was lodged with the Australian Securities & Investments Commission on 20 December 2007. A copy is available on Macmin’s website www.macmin.com.au and on ASX’s website www.asx.com.au. The Prospectus, with personalised Entitlement and Acceptance Form, is expected to be mailed to shareholders on 7 January 2008. Before making a decision whether to take up any of these entitlements to New Shares, please carefully read the Prospectus. The offer closes at 5pm Australian Eastern Standard Time on 30 January 2008. Eligible shareholders wishing to participate in this offer should either pay by BPAY (if you have an account with an Australian financial institution) or complete the Entitlement and Acceptance Form in accordance with the instructions set out on the form and forward it together with an Australian dollar cheque or bank draft to Macmin’s share registry, Registries Limited. Shareholders not wishing to take up their entitlements may not dispose of those entitlements. SUMMARY OF PRINCIPAL DATES “Ex” Date for entitlements 27 December 2007 Record Date to determine Entitlements 3 January 2008 Prospectus and Entitlement and Acceptance Forms despatched 7 January 2008 Offer closes – last date for lodgement of Entitlement and Acceptance Forms and payment of application money 30 January 2008 New Shares issued and holding statements despatched 6 February 2008 If you have any questions regarding your entitlement or the mailing of the Prospectus and the accompanying Entitlement and Acceptance Form, please contact Macmin’s share registry on (02) 9290 9600 or +61 2 9290 9600 for overseas callers. Yours faithfully,
Garry Edwards
DOWNLOAD PROSPECTUS Download Acceptance Form PDF File (33K) Download Prospectus PDF File (296K) Download Appendix 3B PDF File (64K)
19 December, 2007 TWIN HILLS MINE Silver Powder Production Production is expected to increase as irrigation is extended to cover the remainder of the current 150,000 tonnes on the leach pad and take a step up when a higher rate of crushed ore becomes available from the upgraded crushing circuit. Process ImprovementsA Merrill Crowe plant is required for extraction of silver from the leachate solutions once the level of contained silver falls below the efficient operating range of the electrowinning plant. Construction of a modular plant by the Company will commence in January. Once the first module has been commissioned additional modules will be constructed as required. The estimated cost of the first module is expected to be approximately $150,000. Mining and Leach Pad Construction Mining operations are currently in advance of crushing, with stockpiles of 95,000 tonnes on the crusher run-of-mine pad and 109,700 tonnes of material on the low grade pad at the end of November. This has enabled items of mining equipment to be utilized in earthworks for construction of the next leach pad area to the west of the current pad and ponds. This next pad area will have the capacity to hold approximately 400,000 tonnes of agglomerated ore. The pad area and associated drain launders to the existing storage ponds will be lined with high density polyethylene and ready to receive stacked ore by the end of March 2008. Current crushing production is being placed on the existing pad which has a capacity to hold an estimated 200,000 tonnes on its first lift of 8m high. Crushing Circuit – Upgrade Stage 1A contract for installation and operation of additional screening capacity consisting of a 6m by 2.4m three deck screen and six transfer conveyors has been awarded and includes the provision of an experienced crushing supervisor. The supervisor is expected to arrive in January 2008. However, due to a heavy workload, the contractor now estimates that the current upgrade may not be completed before 15 May 2008 although every effort will be made to complete earlier. The additional screening capacity will extract more fine material (less than 4mm) between the existing jaw and cone crusher for sending direct to the agglomeration and stacking stage. This is designed to increase overall throughput and reduce wear and cost in the later stage of vertical impact crushing equipment which is currently exacerbated by recirculation of excessive fine material. An additional benefit of the increased screening capacity will be the ability to increase the density of blasting patterns to produce more fines during blasting which will reduce the load on the crusher capacity. The contractor’s supervisor will monitor and oversee the performance and maintenance of the entire crushing circuit and recommend further improvements and refinements which can be made once the impact of the first stage upgrade is assessed and quantified. EXPLORATION AND PROJECT ACQUISITION As mentioned in the last update, the Company continues to increase its interest in silver/zinc/lead projects throughout Queensland to provide for future advancement and expansion of operations. This strategy underpins the long-term focus of the Company to seek out high quality silver resources for development. The following provides a summary of recent changes in the Company’s exploration tenement interests. Central Queensland Exploration Permit for Minerals 15168 (EPM15168 – Connors Range), (ASX releases dated 9th May 2006 & 13th September 2006) was granted on 16 November 2007. The Connors Range EPM surrounds the recently drilled Tally Ho silver prospect and covers the south-eastern portion of the Tally Ho Intrusive Complex (THIC). The grant of the Connors Range EPM paves the way for continued exploration along strike (in both directions) from the already identified mineralization of the Tally Ho Silver prospect. Further drilling targeting a number of along strike positions and areas adjacent to the already identified mineralization is planned for the first half of 2008. A second Exploration Permit for Minerals (EPM15775 – Denison Creek), which covers the northern portion of the THIC and adjoins EPM15168, was granted on 30 October 2007. This EPM had been previously been referred to as ‘Pisgah’ in an ASX release dated 13th September 2006. The grant of both the Connors Range and Denison Creek EPM’s allows Macmin to undertake regional exploration of the THIC, which we believe could host additional previously unidentified Intrusive Related Mineralising Systems. Mt Scott Project Exploration Permit for Minerals 15854 (EPM15854 – Mt Scott) was first mentioned in an ASX release dated 13th September 2006. Subsequent to our initial positive results from drilling at the Tally Ho silver prospect, a review of the available literature identified a number of prospects (Mt Scott, Mt Scott South and Kelvin’s) associated with the Mt Scott Granite which are described as having similarities to the Tally Ho mineralising system, and have seen little to no follow-up exploration. The Mt Scott EPM covers these prospects and an initial field inspection will be undertaken in early 2008, with a view to planning follow-up exploration as appropriate. In addition to the regular quarterly reports, the Company will continue to provide operations updates as progress is made. Yours faithfully Garry Edwards
29 November, 2007 The Directors advise that a total of 5,200,000 unlisted options, exercisable at 28 cents on or before 29 November 2010 were today issued to 8 staff members. The options have been issued in accordance with the Macmin Silver Ltd Employee Incentive Option Scheme. An Appendix 3B form (New issue announcement, application for quotation of additional securities and agreement) detailing the issue is attached. Yours faithfully,
Garry Edwards
26 November, 2007 The Directors advise that the Company has issued a total of 8,334 fully paid ordinary shares. The shares were issued as follows: • 8,334 at $0.25 per share pursuant to the exercise of MMNO listed options. An Appendix 3B form (New issue announcement, application for quotation of additional securities and agreement) detailing the issue is attached. Yours faithfully,
Garry Edwards
20 November, 2007 The attached revised Employee Incentive Option Plan was approved by shareholders at the Annual General Meeting held on 20 November 2007.
Yours faithfully, Garry M. Edwards Company Secretary
EMPLOYEE INCENTIVE OPTION PLAN The following are the terms of the Plan:- Macmin Silver Ltd Employee Incentive Option Plan
Terms and Conditions
20 November, 2007 In accordance with Listing Rule 3.13.2, I advise that all motions as per the Notice of Meeting were carried without amendment. The table below lists the proxies received in respect of each motion. All resolutions were decided by a show of hands.
In accordance with Listing Rule 3.16.3, I advise that BDO Kendalls Brisbane have been appointed as Auditors to the Company effective 20 November 2007.
Yours faithfully,
Garry M. Edwards
20 November, 2007 Welcome to the 15th AGM of Macmin Silver Ltd. I would particularly welcome Garry Edwards as Macmin’s new CEO. We believe that as Garry has a strong financial, analytical and management background, he will ensure that the Texas Project moves ahead as efficiently as possible. I would like to thank Denis O’Neill, who has stepped aside for personal reasons, for his efforts for Macmin over the past 15 years. I am pleased to report that silver production started at Twin Hills in mid year with our first sale of silver taking place in early November. In 2007, the silver price traded between approximately US$11.60oz and US15.80oz which is a new 25 year high. The exchange rate between Australian dollars and US dollars has strengthened significantly during the year, and the current A$16.50 price per oz is $1.50 or so below its high in 2006, but is still an attractive price for Macmin. Our view is that the silver price will strengthen further in 2008. Commissioning of the Twin Hills Silver Mine over the past six months revealed a number of problems and performance was disappointing. It did not lead to full scale production as quickly as anticipated. This is not unusual with new mines, but as outlined in our ASX release of 15th October 2007, we believe we have identified the problems and are moving to overcome them. The first commercial production heap of 120,000 tonnes is currently undergoing leaching. We had forecast production of approximately 130,000 ozs for the December quarter. This may not be met, but production is gradually increasing and over the coming months we expect production to increase to a monthly rate of 180,000 oz. An initial sale of 6,450oz of silver powder was made recently. Exploration has continued this year with drilling at the Tally Ho Silver Project and at Mt Gunyan, within the Texas Silver Project. At the Tally Ho Project, sufficient drilling has now been undertaken to allow a JORC compliant resource to be estimated which will be completed 2008, and could lead to development. Exploration on this Central Queensland project will begin in earnest in the New Year with the recent granting of the Mt Scott tenement and imminent grant of two other tenements adjoining Tally Ho. Other silver projects are also under evaluation in Central Queensland. With a very healthy outlook for silver prices going forward, drilling will continue at Mt Gunyan. We recently announced a 1 metre interval of very high grade mineralisation – 542g/t silver and 172g/t gold. This is exceptionally high grade with one tonne of rock having a gross metal value of approximately AUD $4,300.00 at current metal prices. In this business grade is king. In addition, recent drilling has encountered massive sulphide mineralisation which represents an exciting new target in the mineralised system at Mt Gunyan. It has been a positive year for the companies in which Macmin holds equity investments. New Guinea Gold has poured its first gold from the Sinivit Gold Mine and both Malachite and Frontier have produced JORC compliant statements on deposits they have drilled, and Frontier has just produced a very encouraging Conceptual Mining Study for its Kodu deposit. Approximately half of Macmin’s shareholders reside outside Australia, mainly in Germany and Switzerland, and have proven to be strong supporters of the company. I met many of the shareholders in Geneva, Zurich, Frankfurt, Amsterdam, Munich and Paris in early November and I am pleased to report that I was encouraged by their enthusiasm. Before closing, it would be remiss of me not to acknowledge Directors, Management and all Employees of the company. As you are all aware, there is a major resources boom in progress affecting companies’ ability to employ skilled and loyal staff, particularly with new IPO’s listing daily. Your company has been listed for 15 years, and the dedicated team of people built up over that time are an essential and valuable asset of this company, which should not be overlooked by the shareholders. I thank everyone working for the company for their tireless effort. In closing, I wish all shareholders a prosperous 2008 and thank you for your support over the past year. Yours faithfully
R.D. McNeil The information in the report to which this statement is attached that relates to Exploration Results is based on information compiled by Robert McNeil, who is a Fellow of the Australasian Institute of Mining and Metallurgy. Robert McNeil is employed by Macmin Silver Ltd. Robert McNeil has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Robert McNeil consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
13 November, 2007 Summary Drill Results Macmin Silver Ltd has recently received assay results for 4 drill holes from our ongoing drilling programme at the Mt Gunyan prospect. Diamond drilling in the central portion of the prospect has bolstered current mineralised zones and enhanced the depth potential in the area with the intersection of massive sulphide mineralisation in MGD15. While drilling to the east has extended the new mineralised zone recently identified (ASX Release 25 September 2007). Highlights of the drill holes are as follows: MGD12 6m (30-36m) @ 33g/t silver, 0.24% lead MGD13 2.5m (133.87-136.37m) @ 79 g/t silver, 0.1% lead and 0.19% zinc MGD15 3.4m (129-132.4m) @ 39 g/t silver, 0.89g/t gold, 1.4% lead and 2.5% zinc
Results from recently received soil and rock samples collected as part of Macmin’s ongoing project wide regional prospecting and soil sampling programme at Texas has identified an area which shows similarities to the Twin Hills silver deposit. Mt Gunyan Drilling Results received from the recently drilled MGD15 (5725N) which intercepted a semi massive sphalerite, galena, pyrite, silver sulphosalts and gold zone within a board zone of strong siliceous, carbonate and chlorite alteration, returned 3.4m (129-132.4m) @ 39g/t silver, 0.89g/t gold, 1.4% lead and 2.5% zinc, including 0.38m @ 176g/t silver, 6.52g/t gold, 9.2% lead and 16.9% zinc. This style of mineralisation has not previously been intercepted at Mt Gunyan and in conjunction with the results from MGD14 (outlined below) and previous results from MGD1 it leaves the zone open at depth and along strike to the south. The discovery of massive sulphide on Mt Gunyan has significant exploration implications. The historic Silver Spur Mine (located 4km south of Mt Gunyan) was mined for silver from a high-grade massive sulphide ore. It has been speculated that high grade massive sulphide could lie beneath the disseminated style of silver mineralisation at Mt Gunyan and Twin Hills and this intersection encountered in MGD15 adds the first evidence of this possibility. The potential for more high-grade massive sulphide mineralisation, with strong silver-gold mineralisation appears strong, and further deep drilling utilising our new in-house diamond drilling rig will be undertaken in the coming months. The recently discovered eastern mineralised zone has been located 125m north of the previous intersections in MGD009 and MGD011 (ASX Release 25 September 2007) with MGD012 returning an intercept of 6m @ 33g/t silver, including 2m @ 116g/t silver. This mineralisation is open at depth and along strike (both to the north and south). Further drilling utilising our in house drilling rigs will target infilling this zone and exploring along strike. Table 1 - Best Intercepts
Table 2 - Hole Locations for Table 1 data
Sampling & Assaying Details Assaying is carried out by ALS Chemex in Brisbane using the ICP technique for silver, copper, lead, zinc, arsenic and antimony. Gold is assayed by the ICPMS technique. Drill holes Collars have been located with a hand-held Garmin GPS unit. Down hole surveys are recorded with an Eastman style single shot camera. Regional Soils and Prospecting Ongoing regional soil sampling and prospecting has identified a new prospect (Kemps) which shows similarities to the Twin Hills silver deposit (3km south of Kemps) (Figure 1). A strong potassium radiometric anomaly (1000 x 300m) is coincident with a silver soil anomaly (750 x 100m) and a zone of outcropping silicious, haematitic and jarositic volcaniclastic siltstone. The best soil results occur on the southern margin of the potassium radiometric anomaly and two rock chip samples collected from sheared silicious volcaniclastic siltstone, also on the margin of the potassium radiometric anomaly have returned silver values to 22g/t silver. The silicious volcaniclastic siltstone is visually similar to the mineralised rocks found in the Twin Hills Silver Mine. The presence of haematitic and jarositic surface staining is particularly encouraging. Soil lines are 400m apart with samples every 50m along line and will be in filled in the near future, while the areas of outcrop will be more extensively sampled as part of the in fill soil sampling programme. Shallow percussion drilling targeting the better soil and rock sample results will also be carried out in the near future. Sampling & Assaying Details Soil samples consist of approximately 100g of -2mm material collected from below the humic layer and rock samples are typically 1-2kg in size. Assaying is carried out by ALS Chemex in Brisbane using an aqua regia digest which is analysed with the ICP technique for silver, copper, lead, zinc, arsenic and antimony and analysed by the ICPMS technique for Gold. Yours faithfully,Garry Edwards The information in this report that relates to Exploration Results is based on information compiled by Denis O’Neill, who is a Member of The Australasian Institute of Mining and Metallurgy. Denis O’Neill is employed by Macmin Silver Ltd.
9 November, 2007 The Directors advise that the Company has issued a total of 75,000 fully paid ordinary shares. The shares were issued as follows:
An Appendix 3B form (New issue announcement, application for quotation of additional securities and agreement) and Appendix 3Y (Change of Directors Interest Notice) detailing the issue are attached. Yours faithfully
Garry Edwards
7 November, 2007 The Company today received advice of the release of the first tranche (50%) of the Convertible Note funding announced on 19 September 2007. Net US$4,150,580 will be received after deduction of establishment fees and the first 6 months’ interest. These funds will be used to undertake the first stage of an upgrade to the crushing circuit at the Twin Hills mine, maintain a strong exploration impetus on existing projects and also to evaluate new silver project opportunities. The main terms of the Convertible Note are set out below.
Yours faithfully
Garry Edwards
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30 October, 2007 SALE OF SILVER POWDER As foreshadowed in the Company’s announcement of 15th October 2007, the first sale of silver, in powder form, has been made from the Twin Hills Silver Mine. This first trial shipment of powder contained approximately 200kg of silver (6,450 ounces) and although a relatively small batch, its significance lies in the fact that it represents the first commercial sale of our silver product from the mine gate. Yours faithfully
CHIEF EXECUTIVE OFFICER
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18 October, 2007 Notice is hereby given that the Annual General Meeting of Macmin Silver Ltd will be held at The Paradise Room, Gold Coast Turf Club, Racecourse Drive, Surfers Paradise, Queensland on Tuesday 20th November 2007 at 2.00pm. ITEMS OF BUSINESS Financial Report and Directors’ and Auditor’s Reports The Financial Report, the Directors’ Report and the Independent Auditor’s Report for the year ended 30 June 2007 will be presented for consideration. Macmin Silver Ltd’s Annual Report which includes the Financial Report for the year ended 30 June 2007 is available on-line at www.macmin.com.au. Following consideration of Reports, the Chairman will give Shareholders a reasonable opportunity to ask questions on the Reports. A representative of the Auditors will be available to answer questions. Resolution 1: Re-Election of Director – Mr P.A. McNeil That Mr P.A. McNeil, who retires as a Director of the Company in accordance with Article 16.1 of the Constitution and, being eligible, offers himself for re-election, be and is hereby re-appointed a Director of the Company. Resolution 2: Change of Auditor To consider, and if thought fit, to pass the following resolution as an ordinary resolution: “That BDO Kendalls be appointed as auditor of Macmin Silver Ltd effective from the close of this meeting.” A notice of nomination of BDO Kendalls as auditor of the Company is enclosed (Annexure B) with this notice in accordance with Section 328B(3) of the Corporations Act 2001. Without limitation, Section 327B of the Corporations Act is relevant to this resolution. Resolution 3: Approval for Amendment and Continuation of the Macmin Employee Incentive Option Plan That in accordance with the Terms and Conditions of the Macmin Employee Incentive Option Plan (“THE PLAN”) and the provisions of the official Listing Rules of the Australian Stock Exchange (“ASX”), the Company and the Directors of the Company are hereby authorised to amend and continue THE PLAN and the issue of options under THE PLAN are approved for the purpose of ASX Listing Rule 7.2, exception 9. Additional information on this resolution is contained in the explanatory statement attached. It should be noted that the company will disregard any votes cast (other than in respect of the proxies given by other members of the company which contain clear instructions as to how such votes are to be exercised) on this resolution by any person who will participate in THE PLAN and by any associate of those persons. Resolution 4: Advisory/Non-binding Vote on Remuneration Report That the Remuneration Report in the Company’s Annual Report be adopted. Final Item of Business: To transact any other business that may be lawfully brought forward in accordance with the Constitution of the Company and the Corporations Act 2001. Eligibility to Attend and Vote at Meeting The Company has determined that all shares of the Company that are quoted shares at 7.00pm on 18 November 2007 will be taken for the purposes of the meeting to be held by the persons who held them at that time. Notes
EXPLANATORY STATEMENT TO MEMBERS Resolution 3: Approval for Amendment and Continuation of the Macmin Employee Incentive Option Plan The Macmin Employee Incentive Option Plan (“the Plan”) was established with shareholder approval on 22 November 1996 and last amended 24 November 2000. Approval is now sought for amendment and continuation of the Plan. Summary of Amendments Proposed for the Macmin Employee Incentive Option Plan
Listing Rule 7.2 sets out exceptions whereby issues are not counted toward the number of securities which the directors may issue without shareholder approval. By approving issues under the Plan as an exception, any issues of unlisted options under the Plan will not be taken into account in determining the amount of securities (shares or options) the directors may issue without shareholder approval. The revised terms and conditions of the Plan are attached at Annexure A. Resolution 4: Advisory/Non-binding Vote on Remuneration Report A vote on the adoption of the Remuneration Report is a requirement of the Corporations Act 2001. The vote on the resolution is advisory only and does not bind the Directors or the Company. The Directors believe remuneration as per the report is modest and is at or below industry levels. Annexure A REVISED EMPLOYEE INCENTIVE OPTION PLAN The following are the revised terms of the Plan:- Macmin Silver Ltd Employee Incentive Option Plan The Macmin Silver Ltd Employee Incentive Option Plan ("the Plan") is described in and administered by the terms and conditions set out below.
Terms and Conditions REVISED EMPLOYEE INCENTIVE OPTION PLAN
Annexure B COPY OF SHAREHOLDER NOMINATION OF NEW AUDITOR 5 October 2007 Mr Garry Edwards Company Secretary Macmin Silver Ltd PO Box 7996 GOLD COAST MAIL CENTRE QLD 9726 Dear Mr Edwards Pursuant to Section 328B(1) of the Corporations Act 2001, Robert D. McNeil, as a shareholder of Macmin Silver Ltd hereby nominates BDO Kendalls Chartered Accountants, for appointment as auditors of the Company at the next Annual General Meeting or any adjournment thereof, subject to the resignation of the current auditors, PricewaterhouseCoopers, Brisbane. Yours sincerely
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15 October, 2007 Macmin’s objective is to consolidate its unique position as the premier silver focused company in Australia. This objective is based on our belief that rising silver prices herald a recognition that silver in the 21st Century will be a fundamental metal in technological advances and an important investment asset. To progress that objective the Board’s plan for 2008 is to: Bob McNeil, Chairman of Macmin Silver noted “Commissioning at the Twin Hills Silver Mine over the past six months has not led to full scale production as quickly as anticipated. This is not unusual with new mines, but we believe we have identified all the problems and are moving to overcome them. We expect silver production to gradually increase over the coming months to a monthly rate of 180,000ozs. This target may not be achieved until well into 2008. We will continue to investigate the possibility of further increasing production rates. The silver powder produced at the Twin Hills Mine is a unique product which is eventually expected to sell at a premium to the spot silver price. An initial sale of approximately 250kg (8,000oz) of silver powder is expected to be made this week and will be reported once concluded. Our exploration program to identify additional silver or silver/lead/zinc resources in Queensland is expected to provide a considerable further upside to the Company in later 2008, particularly as we focus on identifying additional resources at the Texas tenements and in projects such as Tally Ho. Production of silver is very important to the Company but identification of new projects for future expansion is equally important.” TWIN HILLS MINE UPDATE The Twin Hills mine is an open cut mine which, when producing at the rate of 180,000ozs of silver per month, will mine approximately 80,000 tonnes of ore (both higher grade heap leach ore and lower grade dump leach ore) per month. Mining, processing, commissioning of the plant and the move to higher production rates has been much slower than expected. The process from identification of silver resources to production of silver powder can be summarised as follows: Resources Resources are identified by early drilling and later confirmed by detailed “grade control” drilling. Grade control drilling has been completed to an approximate depth of 30m over much of the proposed pit surface and has confirmed the earlier estimates of grade and tonnages – the silver is present in the rock. Previously announced Resources for Twin Hills only are shown below (see also 2007 Annual Report):
Total Resources are as follows:- Measured Resource - 2.9Mt at 72g/t silver and 0.1g/t gold for contained silver and gold of 6.7Mozs silver and 9,300 ozs gold Indicated Resource - 8.6Mt at 43g/t silver and 0.1g/t gold for contained silver and gold of 11.9Mozs silver and 28,000 ozs gold Inferred Resource - 6.95Mt at 44g/t silver and 0.1g/t gold for contained silver and gold of 9.8Mozs silver and 22,000 ozs gold A limited number of deep drill holes indicate the current mineralisation at Twin Hills extends at depth and along strike beyond the present Resource. This mineralisation has not yet been drilled out. A complete Resource Statement for the Texas Project is stated in the 2007 Annual Report. Mining Mining is carried out by drill and blast followed by transport to the crushing facility. At present two excavators, two bulldozers and four 50t trucks are on site for use in this operation. High grade ore goes straight to the crushing circuit, low grade ore is presently stockpiled for later silver extraction, and waste is taken to the waste rock dump. In view of current higher silver prices the pit design is being continually evaluated to allow lower grade ore to be mined and processed. Mining is progressing satisfactorily and an increase in the mining rate to match increased crushing capacity is achievable. To date 199,000 tonnes of medium-high grade ore, 102,000 tonnes of low grade ore and 242,000 tonnes of waste have been mined. Crushing, Agglomerating and Stacking The higher grade ores are crushed to <4mm in size, agglomerated with cement and lime to achieve the required pH, and stacked onto heaps for leaching. Reliability and availability constraints (particularly the lengthy repair of the jaw crusher failure) within the mobile section of the crushing circuit has reduced crusher throughput. A trained workforce has been difficult to recruit and the Company has followed a program of local recruitment and on-the-job training which has slowed production. Such workforce training requirements and crusher availability have so far prevented the introduction of a second shift. Additional employees from outside the local area are presently being recruited to allow implementation of a two shift, 7 day/week operation. In addition quotations and contracts are being evaluated for a contract crushing arrangement but the installation of any contract crushing equipment is estimated to take 20 to 24 weeks from date of commitment. Stacker design and operation initially delayed stacking of the crushed ore, however the characteristics of the ore have proved favourable for leaching and that has allowed for increased use of conventional stacking machinery. Heap Leaching After being placed on heaps up to 8m high the ore is saturated with a leaching solution which dissolves the silver. The solution (pregnant solution) with the dissolved silver is collected by pipes at the base of the heap and stored in specially constructed and covered ponds. The ore characteristics have facilitated percolation of solution through the heaps and that part of the operation is working well but actual leaching recovery rates have yet to be determined. Leaching has not been continuous due to a revamp of the irrigation system and a major clean out of the leaching circuit to remove fine material accumulated during construction. It is estimated that 6,000kg (193,000oz) of silver will be leached from the heaps already in place. Silver in solution inventory in the process ponds awaiting electrowinning amounts to 800kg (25,700oz). Silver Powder Production The silver is extracted from the pregnant solutions by an electrowinning process. This electrowinning plant (EM-EW) contains 180 cells, is modular and can be relatively easily increased in capacity and produces a silver powder containing about 98% silver. This silver powder is dried, stored in drums and sold “as is” or can be refined into silver ingots. Approximately 280kg (9,000oz) of silver has been produced to date. Production of 4,000kg (128,600oz) of silver is forecast for the fourth quarter of 2007. 60 of the 180 cells of the electro-winning plant have been utilised in extensive trials with varying conductivity, voltage/current, flow-rates and temperature levels to improve extraction rates of silver powder in the electrowinning cells. During the week ended 28th September the EM-EW plant ran 12 hours per day every day for the first time and produced the highest extraction rates per cell to date. Extraction rates per cell are still 40% below design expectations but the plant was built with extra cell capacity and can be extended as required. It may be necessary to install a small Merrill Crowe silver extraction plant to recover silver in lower grade leachate solutions which are not economical to treat through the EM-EW plant. It is apparent that the temperature of the leach solution has more effect on silver recovery by electrowinning than previously thought and the initial trials completed on-site in low winter temperatures were adversely affected. Summer temperatures heating the solution will deliver more efficient recoveries and investigations will be undertaken into heating the solution for winter processing in future. Continued extraction of silver powder from the cells has now provided data and operating parameters for the finalising of an effective powder filtering, drying and packaging system. Marketing The silver powder being produced is a unique product, is of good purity and its very fine texture is providing marketing opportunities which may attract a premium to the spot price for silver. Silver sizing analysis has confirmed the very fine nature of the powder with size range being 1 to 50 microns and 72% of the powder being less than 20 microns. Two contractual arrangements for sale of small monthly quantities of silver in the powder form are being negotiated. Any silver not sold as powder can be smelted and sold in conventionalingot form. Low Grade Ore Treatment The plan for Twin Hills includes processing of lower grade ores without the cost of crushing to the fine size used for the higher grade ore. This component of the production plan relies on stacking the coarse lower grade material on top of fine material which has been fully leached. This eliminates the need for additional leach pad construction costs for the lower grade ore. At this stage the lower grade material is being stockpiled pending availability of re-usable leaching areas. ENVIRONMENTAL PROTECTION AGENCY APPROVALS (“EPA”) As per the conditions set out in the Environmental Authority, an independent Site Water Management and Monitoring Plan has been completed and sent to the EPA in draft form. A consultant group specialising in site rehabilitation has been engaged to prepare the engineering documentation required for the capping of the waste rock dump, stockpiles and heap leach area. Progressive capping and re-vegetation of these areas is an ongoing EPA requirement. SILVER SPUR ZINC MINERALISATION Zinc mineralisation is known to occur adjacent to Twin Hills at the historic Silver Spur silver/zinc mine. Previously announced Resources at Silver Spur include: We have not yet determined how best to proceed with the Silver Spur Resources, mainly due to other management priorities. The Resource could, however, add to the Company’s cash flow in the future. Yours faithfully
Garry Edwards CHIEF EXECUTIVE OFFICER The information in the report to which this statement is attached that relates to Exploration Results and Mineral Resources is based on information compiled by Robert McNeil, who is a Fellow of the Australasian Institute of Mining and Metallurgy. Robert McNeil is employed by Macmin Silver Ltd. Robert McNeil has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Robert McNeil consents to the inclusion in the report of the matters based on his information in the form and context in which it appears. Download PDF File [106K]
27 September, 2007 Macmin Silver Ltd has recently received assay results for the final 12 drill holes from the drilling programme completed at our Tally Ho prospect in May 2007. Highlights of the drill holes are as follows:
Final assay results for the drilling programme completed in May 2007 at the Tally Ho prospect have recently been received. The best intercepts from the final 12 drill holes are presented in Table 1, with hole location data shown in Table 2. The Tally Ho prospect is part of the Central Queensland Project and is situated approximately 45km southwest of Mackay in Central Queensland. Holes GRRC44, 45 and 47 are from the northern section of the mineralised breccia with a best intercept of 2m at 711g/t Silver, 2.11g/t Gold and 7.67% Zinc in GRRC44 from 57m located within a mineralised zone which extended from surface to 81m downhole assaying 109g/t Silver, 0.12g/t Gold, 1.03% Zinc, 0.16% Lead and 0.19% Copper. Holes GRDD9, 10, 14 and 19 have all intersected zones of strong silver/gold mineralisation, with a best intercept of 1m at 384g/t Silver and 10.15g/t Gold in GRDD9 from 126m. All of these intercepts are deeper (downhole) than the extensive silver/zinc (+/-gold, lead and copper) mineralisation. Earlier drilling results (see previous ASX releases dated 7th June 2007 and 10th July 2007) also support the existence of a deeper (downhole) silver/gold rich zone of mineralisation. The exact nature and relationship of the ‘deeper' silver/gold mineralisation and the more extensive silver/ zinc (+/-gold, lead and copper) mineralisation is uncertain at present, but will be reviewed as part of a comprehensive evaluation of all drilling data completed on the Tally Ho prospect. The ‘deeper' silver/gold mineralisation may represent a separate mineralising event, which has over printed or been over printed by the silver/zinc (+/-gold, lead and copper) mineralisation. A better understanding of this relationship will assist with targeting future drilling both on the Tally Ho prospect and exploration on the surrounding tenements. Production of drill sections spaced 20m apart (on a recently established local grid) over the strike length of the prospect is underway, which will allow a full sectional review of all drilling data with the aim of gaining a greater understanding of the mineralising system (ie breccia pipe) and producing a JORC compliant resource. Two drill sections [5040N and 4980N] show the silver equivalent* mineralisation and its relationship to the breccia granite from the drilling carried out to date. The breccia mineralising system (ie breccia pipe), which trends north north-east has been drill tested over a strike length of 180-200m. There is potential to locate further mineralisation of this nature either along strike (both to the north north-east and the south south-west) and/or as a parallel system. It is planned to undertake a programme of reconnaissance drilling in the coming months, utilising one of the Company's privately owned drilling rigs, to test for further mineralisation along strike. A programme of soil sampling and prospecting is currently in progress, over an area of approximately 1.2 x 1.5km (centred on the Tally Ho prospect), with the aim of identifying further drill targets. Drill Hole Numbers Hole numbers GRRC39 and GRDD11, 12 and 13 have not been used. Sampling and Assaying Details Sampling of reverse circulation holes was undertaken over 1m and 2m intervals within the visual breccia zones (ie mineralised zones) and over 4m intervals through the un-brecciated, unaltered zones (ie non-mineralised zones). Diamond core has been sampled over 1m intervals (1/2 core) within the breccia zones, with the altered margins being sampled over 2m intervals (1/4 core) for 2-4 samples either side of the breccia zones. Most diamond core has only been sampled in the area of the brecciation and alteration. A few diamond holes have had more extensive sampling over the full length of the hole at 4m intervals out side of the brecciation and alteration zones. As part of the Company's quality control programme, a duplicate sample is collected about every 20 samples and submitted under a different sample number providing a check on repeatability. Assaying is carried out by ALS Chemex in Brisbane. Samples are subjected to an Aqua Regia digest followed by analysis for Silver (Ag), Copper (Cu), Lead (Pb), Zinc (Zn), Arsenic (As), Antimony (Sb), Bismuth (Bi) and Molybdenum (Mo) by the ICP-AES technique and Gold (Au) by the ICP-MS technique. Table 1 - Best Intercepts ![]() Note: *The calculation process and metal prices used in the calculation of Silver equivalents are:
Table 2 - Hole locations for Table 1. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||



