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CLARA RESOURCES AUSTRALIA LTD — Capital/Financing Update 2014
Sep 1, 2014
64598_rns_2014-09-01_48b47628-7465-4b77-bc8d-ec5cdf0c74a8.pdf
Capital/Financing Update
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ASX Announcement
Aus Tin Mining Limited (ASX: ANW)
2 September 2014
Exploration Targets Identified for Potential High-Grade Supplementary Feed to Lift Taronga Economics
Highlights
-
Research program identifies 305 tin prospects and historic mines in the New England tin province covered by Aus Tin Mining’s exploration licences.
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Data review of historic records and previous work to date indicates six (6) key targets within close trucking distance to the Taronga Tin Project and provides the basis for an initial Exploration Target of approximately 150,000 to 265,000 tonnes at approximately 2.3% to 2.5%Sn, or approximately 3,450 to 6,625 tonnes of contained tin, noting the potential grade and tonnage is conceptual in nature, that there has been insufficient exploration to estimate a Mineral Resource and that it is uncertain if further exploration will result in the estimation of a Mineral Resource. The Company is planning an exploration program to test the targets over the next 12 months as detailed below.
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Aus Tin Mining to accelerate the definition of potential supplementary of high‐grade feed for the Taronga Tin Project.
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Revised assessment of Taronga to include potential high grade supplementary feed, copper, silver, tungsten and molybdenum credits, and improved metal recoveries.
The Directors of Aus Tin Mining Limited (the Company) are pleased to advise that an internally commissioned evaluation of regional exploration targets has been undertaken, and a number of potential high tin grade targets have been identified that have the potential to substantially enhance the economics of the Taronga Tin Project ( Taronga ).
The Company has previously announced the results of the Pre‐Feasibility Study ( PFS ) for Taronga that confirmed the technical and economic viability of the Project and highlighted areas of potential economic upside, including an increased plant feed grade. As reported in conjunction with the results of the PFS, an increase in the average plant feed grade from 0.16%Sn to 0.19%Sn would have the impact of increasing NPV(8%) from AU$63.15M to AU$145.71M[1] . This potential uplift was reported in the context of range of probable true grades between 0.19%Sn to 0.25%Sn (based on a trend observed whereby larger samples tended to provide a higher grade ‐ the Support Effect). Additional benefits may flow from (i) the recovery of copper and silver credits if supported by feasibility studies; and (ii) the inclusion of supplementary high grade ore and the establishment of a centralised processing plant at Taronga (underpinned by Probable Ore Reserves). This could enable the Company to mine and process small high grade deposits which may be too small to develop as a stand‐alone operation.
1 Refer ASX Announcement dated 7th April 2014
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
The assessment of peripheral high‐grade targets provides the opportunity to extend the resource life, shorten the payback period, mine and treat additional lower‐grade ore at Taronga after the existing plans, and increase the NPV and IRR of the Project. The key strategy would be to displace lower‐grade material with high‐grade material at the early stage of mine development. No significant increase in capital costs are envisaged for Taronga, and capital costs at the high‐grade peripheral prospects would largely be restricted to mine development.
The evaluation has identified in excess of 300 historic prospects within the Company’s wholly owned exploration tenements ( Figure 1 ), of which six (6) key target prospects have in the past supported substantial tin mining operations, and now offer potential for high‐grade feed to Taronga. Each of the six (6) projects is located within 25km and trucking distance of Taronga.
An Exploration Target of approximately 150,000 to 265,000 tonnes at approximately 2.3% to 2.5%Sn, or approximately 3,450 to 6,625 tonnes of contained tin, has been estimated for three of the historic high‐ grade mines located within the Company’s wholly owned tenements. The Exploration Target is based upon feasibility work completed by previous owners and potential strike extension at each of the historic mines and the Company considers that there is potential to mine material from these historic mines and supplement the feed to the Taronga Plant.
However, it should be noted that the potential grade and tonnage is conceptual in nature, that there has been insufficient exploration to estimate a Mineral Resource and that it is uncertain if further exploration will result in the estimation of a Mineral Resource. The Company intends to undertake a program of work over the next 12 months as outlined under the section “Exploration Target”.
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Figure 1: Location of historic mines and/or reported mineral occurrences
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
Having undertaken a preliminary evaluation of each of the key targets, the Company will in the first instance look to advance the following targets as potential supplementary feed sources:
- Dutchman & Harts These historic mines are located 17km NE of Taronga and historic production is reported as approximately 60,000 tonnes at a grade of 3.5%Sn[2] . Ore was exploited from a number of sub‐vertical quartz‐chlorite‐sericite‐cassiterite lodes via underground operations to a depth of 246m (refer Figure 2 ) periodically between 1875 and 1953.
During the 1960s, rehabilitation of the historic workings and subsequent exploration was undertaken by various parties including Carpentaria Exploration Pty Ltd (part of Mount Isa Mines), BHP, Mobile Alluvial Tin Pty Ltd and North Broken Hill Ltd (NBH). In 1967 NBH undertook a feasibility study on Dutchman & Harts in conjunction other projects in the area and concluded that mining operations would be feasible.
More recently (2006 to 2010) YTC Resources Ltd completed various exploration activities including a program of five diamond drilling holes with the highest reported result being 0.8m at 3.6%Sn (HD04 from 40.7m) and 1.0m @ 1.23%Sn (HD04 from 60m)[3] . These results confirm the high grade nature of the mineralisation and are consistent with the grade historically reported.
Tin mineralisation at Dutchman & Harts has been historically over a 500m strike and is open at depth.
The Eclipse Lode to the southeast runs sub‐parallel to the Dutchmans Lode and several rich “bungs” or rich clots of the tin mineral cassiterite were reportedly mined to a depth of 84m and were up to 3m wide with the ore being described as exceptionally rich. It is not clear why NBH did not assess the Eclipse Lode however, this could provide additional upside to the Exploration Target.
- Curnows is located 3km south of Torrington and was referred to as the largest individual tin producing lode in the area and the deepest (274m). The lode was discovered in 1880 and mined principally from 1881 to 1887 and 1926 to 1950. Historical production is reported as approximately 27,000t for a grade of 2.9%Sn[4] .
Cassiterite occurs within a quartz‐chlorite lode that dips steeply northwest to vertical and ranges from a few millimeters to 1.8m in width. The lode has been worked along strike for 300m and plunges northeast. Wolframite (Fe,MnWO4) and molybdenite (MoS2) have also been observed within the host granite.
- Wallaroo is located 17km NE of Taronga and was mined periodically between 1882 and 1944 by underground and open pit, with historical production reported as at approximately 6,800t at 1.9%Sn[5] but with grades of up to 4.4%Sn[6] .
Mineralisation comprises quartz‐chlorite‐cassiterite veins and has been mined over an estimated strike of 260m, however, the vein can be traced for a distance of 2.4km[7] . The most recent exploration work was undertaken by Aberfoyle in 1982 but limited to sampling of mine waste.
2 Source: North Broken Hill Limited, Torrington Tin Mines Feasibility Study, 1967, converted to tonnes and %Sn
3 Source: YTC Resources Ltd, Final Report EL 6389, September 2011
4 Source: North Broken Hill Limited, Torrington Tin Mines Feasibility Study, 1967, converted to tonnes and %Sn
5 Source: North Broken Hill Limited, Torrington Tin Mines Feasibility Study, 1967, converted to tonnes and %Sn
6 Source: Geological Survey of NSW, June 2000
7 Source: Nicholson, 1968 (GS 568/134)
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261)
Phone: 07 3303 0611, Fax: 07‐3303 0681
NBH completed a feasibility report in 1967 to evaluate mining and processing operations at the Torrington Field, including the four mines Butlers, Dutchman & Harts, Curnows and Wallaroo. In its feasibility report, NBH reported historical production for the mines ( Table 1 ). It should be noted that NBH reported production in terms of Tons and “Recovered % Concentrate” and that Aus Tin Mining has converted to Tonnes and %Sn for convention[8] .
| Accepted Historical | Production | Accepted Historic Production | Accepted Historic Production | |
|---|---|---|---|---|
| (converted) | ||||
| Tons Mined | Recovered | Tonnes | %Sn |
|
| Grade | ||||
| (% Conc) | ||||
| Dutchman & Harts | 65,900 | 3.8 | 59,771 | 3.5 |
| Curnows | 30,000 | 3.1 | 27,210 | 2.9 |
| Wallaroo | 7,500 | 2.0 | 6,803 | 1.9 |
| Total | 103,400 | 3.5 | 93,784 | 3.2 |
Table 1: Historical Production from Dutchman & Harts, Curnows and Wallaroo (North Broken Hill Ltd, 1967)
NBH estimated potential production ( Table 2 ) based on underground mining operations and concluded that operations at Torrington would be feasible based on the construction and operation of a processing plant at site.
| Assumed Potential Production | Assumed Potential Production | Estimated Target (Aus Tin Mining) | Estimated Target (Aus Tin Mining) | |
|---|---|---|---|---|
| (Source North Broken Hill, 1967) | ||||
| Tons Mined | Recovered | Tonnes | %Sn | |
| Grade | ||||
| (% Conc) | ||||
| Dutchman & Harts | 135,000 | 2.5 | 122,445 | 2.3 |
| Curnows | 19,800 | 3.0 | 17,959 | 2.8 |
| Wallaroo | 9,000 | 4.0 | 8,163 | 3.7 |
| Total | 163,800 | 2.6 | 148,567 | 2.4 |
Table 2: Assumed Potential Production ex North Broken Hill Limited, 1967 and Estimated Target, Aus Tin Mining)
In addition to the potential supplementary feed sources previously described, the Company will also evaluate the following prospects:
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Taylors is located 10km NE of Taronga and whilst specific historic production records are not available, eluvial and alluvial operations exploited ore from three main lodes (cassiterite‐quartz, wolframite‐cassiterite‐quartz‐chlorite, wolframite‐bismuthinite‐molybdenite‐cassiterite). Historic exploration reports include various drilling results with significant intersections including 1.06m @ 0.70%Sn (G.C.8 from 6.1m) and 1.06m @ 3.61%WO3 (G.C.9 from 24.4m)[9] .
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Planet Mine is located 26km NNE of Taronga. Mining at the Planet Mine commenced in 1872 and operated variously to 1931, primarily as an underground operation to a depth of 40m. Tin mineralisation is quartz‐chlorite‐cassiterite veining with cassiterite associated with quartz stingers. Pacific Copper Limited undertook various exploration activities during the period of 1980 to 1984 including a drilling program with the most significant intersection being 1.0m @ 16%Sn (PT1 from 90m)[10] . More recently (2006‐2011) YTC Resources Limited completed various exploration activities including a program of four diamond drilling holes with the highest reported result being 1.0m at 3.74%Sn (SD001 from 109m)[11] .
8 Tonnes = Tons x 0.907 ; %Sn = %Concentrate / 70% (assumed tin recovery) x 65% (assumed Sn grade of concentrate) 9 Source: Geological Survey of NSW, GS1975/294 , December 1974
10 Source: Pacific Copper Limited, Final Report, November 1984
11 Source YTC Resource, Final Report EL 6392, September 2011
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261)
Phone: 07 3303 0611, Fax: 07‐3303 0681
- McDonalds prospect lies approximately 6km north east and along strike from Taronga. Whilst no historical production records have been identified, at site there is evidence of significant activity including shallow pits and underground workings. Exploration undertaken by Aus Tin Mining has identified coincident zones of elevated tin‐in–soil geochemical results with areas of increased chargeability indicating possible sulphides, and these zones will be explored in more detail.
Exploration Target
Based on the feasibility study completed by NBH and an assessment of potential strike extension at Dutchman & Harts, Curnows and Wallaroo, the Company has internally generated an Exploration Target of approximately 150,000 to 265,000 tonnes and approximately 2.3% to 2.5%Sn, or approximately 3,450 to 6,625 tonnes of contained tin (refer Table 3 ). It should be noted that the potential grade and tonnage is conceptual in nature, that there has been insufficient exploration to estimate a Mineral Resource and that it is uncertain if further exploration will result in the estimation of a Mineral Resource. The Company intends to conduct a program of exploration works over the next 12 months, including field mapping, geochemical surveys and drilling to progress these targets and to be carried out in conjunction with the Taronga Definitive Feasibility Study. The Company will also continue to progress the exploration of the McDonalds and Emerald Projects, both of which are sheeted vein systems and analogous to Taronga.
| Tonnes 12 | Grade %Sn12 | Contained Tin (t) | |
|---|---|---|---|
| (Approximates) | (Approximates) | (Approximate) | |
| Dutchman & Harts | 122,000 ‐ 197,000 | 2.2 ‐ 2.4 | |
| Curnows | 17,000 ‐ 18,000 | 2.7 – 2.9 | |
| Wallaroo | 10,000 ‐ 50,000 | 2.7 – 2.9 | |
| Exploration Target(Rounded) | 150,000 – 265,000 | 2.3 – 2.5 | 3,450 – 6,625 |
Table 3: Exploration Target for Dutchman & Harts, Curnows and Wallaroo
The potential benefit of by‐product credits will also be examined including molybdenum, tungsten and silver and more specifically the high tungsten assay results reported for historical drilling at Taylors (1.06m @ 3.61% WO3) will warrant early investigation.
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On behalf of the Board KM Schlobohm Company Secretary
Email: [email protected]
Electronic copies and more information are available on the Company website: www.austinmining.com.au
For further information contact:
Mr. Peter Williams CEO, Aus Tin Mining Limited Ph: 07 3303 0611
Karl Schlobohm Company Secretary, Aus Tin Mining Limited Ph: 07 3303 0680
12 The Company has calculated a %Sn grade by adjusting the previously reported recovered % Concentrate grade for recovery (70%) and grade (65%)
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
COMPETENT PERSON STATEMENT
The information in this presentation that relates to Exploration Targets and Exploration Results is based on information compiled by Mr Nicholas Mather B.Sc (Hons) Geol., who is a Member of The Australian Institute of Mining and Metallurgy. Mr Mather is employed by Samuel Capital Pty Ltd, which provides certain consultancy services including the provision of Mr Mather as a Director of Aus Tin Mining. Mr Mather has more than five years experience which is relevant to the style of mineralisation and type of deposit being reported and to the activity, which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Minerals Resources and Ore Reserves’ (the JORC Code). This public report is issued with the prior written consent of the Competent Person(s) as to the form and context in which it appears.
The information in this Announcement that relates to Mineral Resources is based on information extracted from the report entitled “Maiden JORC Resource Estimated for the Taronga Tin Project” created on 26[th] August 2013 and is available to view on www.austinmining.com.au Aus Tin Mining confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.
In the information in this Announcement that relates to Ore Reserves is based on information extracted from the report entitled “Pre‐Feasibility Advances the Taronga Tin Project” created on 7[th] April 2014 and is available to view on www.austinmining.com.au. Aus Tin Mining confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
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Figure 2: Surface plan and cross sections of workings on the Harts and Western Lodes (Source Geological Survey of NSW (GS1998/125) based on mine plans prepared by BHP (GS1963/159)
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
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Figure 3: Cross Section of the Curnows Mine located within EL7800 (Source GS1998/125)
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
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Figure 4: Cross Section of the Historic Wallaroo Mine located within EL7800 (Source Geological Survey of NSW, 2000)
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
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JORC Code, 2012 Edition – Table 1
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Sampling | Nature and quality of sampling (eg cut channels, random | The results reported are taken from historical reports (between 1963 |
| techniques | chips, or specific specialised industry standard measurement | and 2011) prepared by different companies and vary in the details |
| tools appropriate to the minerals under investigation, such as | provided on sampling information. The work completed has largely | |
| down hole gamma sondes, or handheld XRF instruments, etc). | been undertaken by reputable mining companies and to a standard |
|
| These examples should not be taken as limiting the broad | the Competent Person considers adequate for the purpose of | |
| meaning of sampling. | reporting. | |
| Include reference to measures taken to ensure sample | ||
| representivity and the appropriate calibration of any | ||
| measurement tools or systems used. | ||
| Aspects of the determination of mineralisation that are Material | ||
| to the Public Report. | ||
| In cases where ‘industry standard’ work has been done this | ||
| would be relatively simple (eg ‘reverse circulation drilling was | ||
| used to obtain 1 m samples from which 3 kg was pulverised to | ||
| produce a 30 g charge for fire assay’). In other cases more | ||
| explanation may be required, such as where there is coarse | ||
| gold that has inherent sampling problems. Unusual | ||
| commodities or mineralisation types (eg submarine nodules) | ||
| may warrant disclosure of detailed information. | ||
| Drilling techniques | Drill type (eg core, reverse circulation, open-hole hammer, | The results reported are taken from historical reports (between 1963 |
| rotary air blast, auger, Bangka, sonic, etc) and details (eg core | and 2011) prepared by different companies and vary in the details | |
| diameter, triple or standard tube, depth of diamond tails, face- | provided on sampling information. The work completed has largely | |
| sampling bit or other type, whether core is oriented and if so, | been undertaken byreputable miningcompanies and to a standard |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
| Criteria | JORC Code explanation | Commentary | Commentary |
|---|---|---|---|
| by what method, etc). | the Competent Person considers adequate for the purpose of | ||
| reporting. | |||
| | |||
| Drill sample | Method of recording and assessing core and chip sample | | The results reported are taken from historical reports (between 1963 |
| recovery | recoveries and results assessed. | and 2011) prepared by different companies and vary in the details | |
| Measures taken to maximise sample recovery and ensure | provided on sampling information. The work completed has largely | ||
| representative nature of the samples. | been undertaken by reputable mining companies and to a standard | ||
| Whether a relationship exists between sample recovery and | the Competent Person considers adequate for the purpose of | ||
| grade and whether sample bias may have occurred due to | reporting. | ||
| preferential loss/gainof fine/coarse material. | |||
| Logging | Whether core and chip samples have been geologically and | | The results reported are taken from historical reports (between 1963 |
| geotechnically logged to a level of detail to support appropriate | and 2011) prepared by different companies and vary in the details | ||
| Mineral Resource estimation, mining studies and metallurgical | provided on sampling information. The work completed has largely | ||
| studies. | been undertaken by reputable mining companies and to a standard | ||
| Whether logging is qualitative or quantitative in nature. Core | the Competent Person considers adequate for the purpose of | ||
| (or costean, channel, etc) photography. | reporting. | ||
| The total length and percentage of the relevant intersections | |||
| _logged. _ | |||
| Sub-sampling | If core, whether cut or sawn and whether quarter, half or all | | The results reported are taken from historical reports (between 1963 |
| techniques and | core taken. | and 2011) prepared by different companies and vary in the details | |
| sample preparation | If non-core, whether riffled, tube sampled, rotary split, etc and | provided on sampling information. The work completed has largely | |
| whether sampled wet or dry. | been undertaken by reputable mining companies and to a standard | ||
| For all sample types, the nature, quality and appropriateness | the Competent Person considers adequate for the purpose of | ||
| of the sample preparation technique. | reporting. | ||
| Quality control procedures adopted for all sub-sampling stages | |||
| to maximise representivity of samples. | |||
| Measures taken to ensure that the sampling is representative | |||
| of the in situ material collected, including for instance results | |||
| for field duplicate/second-half sampling. | |||
| Whether sample sizes are appropriate to the grain size of the | |||
| _material being sampled. _ | |||
| Quality of assay | The nature, quality and appropriateness of the assaying and | | The results reported are taken from historical reports (between 1963 |
| data and laboratory | laboratory procedures used and whether the technique is |
and 2011) prepared by different companies and vary in the details | |
| tests | considered partial or total. | provided on sampling information. The work completed has largely | |
| For geophysical tools, spectrometers, handheld XRF | been undertaken by reputable mining companies and to a standard | ||
| instruments, etc, the parameters used in determining the | the Competent Person considers adequate for the purpose of | ||
| analysis including instrument make and model, reading times, | reporting. |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| calibrations factors applied and their derivation, etc. | ||
| Nature of quality control procedures adopted (eg standards, | ||
| blanks, duplicates, external laboratory checks) and whether | ||
| acceptable levels of accuracy (ie lack of bias) and precision | ||
| _have been established. _ | ||
| Verification of | The verification of significant intersections by either | The results reported are taken from historical reports (between 1963 |
| sampling and | independent or alternative company personnel. | and 2011) prepared by different companies and vary in the details |
| assaying | The use of twinned holes. | provided on sampling information. The work completed has largely |
| Documentation of primary data, data entry procedures, data | been undertaken by reputable mining companies and to a standard | |
| verification, data storage (physical and electronic) protocols. | the Competent Person considers adequate for the purpose of | |
| Discuss any adjustment to assay data. | reporting. | |
| Location of data | Accuracy and quality of surveys used to locate drill holes | The results reported are taken from historical reports (between 1963 |
| points | (collar and down-hole surveys), trenches, mine workings and | and 2011) prepared by different companies and vary in the details |
| other locations used in Mineral Resource estimation. | provided on sampling information. The work completed has largely | |
| Specification of the grid system used. | been undertaken by reputable mining companies and to a standard | |
| Quality and adequacy of topographic control. | the Competent Person considers adequate for the purpose of | |
| reporting. | ||
| Data spacing and | Data spacing for reporting of Exploration Results. | The results reported are taken from historical reports (between 1963 |
| distribution | Whether the data spacing and distribution is sufficient to | and 2011) prepared by different companies and vary in the details |
| establish the degree of geological and grade continuity | provided on sampling information. The work completed has largely | |
| appropriate for the Mineral Resource and Ore Reserve | been undertaken by reputable mining companies and to a standard | |
| estimation procedure(s) and classifications applied. | the Competent Person considers adequate for the purpose of | |
| Whether sample compositing has been applied. | reporting. | |
| Orientation of data | Whether the orientation of sampling achieves unbiased | The results reported are taken from historical reports (between 1963 |
| in relation to | sampling of possible structures and the extent to which this is | and 2011) prepared by different companies and vary in the details |
| geological | known, considering the deposit type. | provided on sampling information. The work completed has largely |
| structure | If the relationship between the drilling orientation and the | been undertaken by reputable mining companies and to a standard |
| orientation of key mineralised structures is considered to have | the Competent Person considers adequate for the purpose of | |
| introduced a sampling bias, this should be assessed and | reporting. | |
| reported if material. | ||
| Sample security | The measures taken to ensure sample security. | The results reported are taken from historical reports (between 1963 |
| and 2011) prepared by different companies and vary in the details | ||
| provided on sampling information. The work completed has largely | ||
| been undertaken byreputable miningcompanies and to a standard |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| the Competent Person considers adequate for the purpose of | ||
| reporting. | ||
| Audits or reviews | The results of any audits or reviews of sampling techniques | The results reported are taken from historical reports (between 1963 |
| and data. | and 2011) prepared by different companies and vary in the details | |
| provided on sampling information. The work completed has largely | ||
| been undertaken by reputable mining companies and to a standard | ||
| the Competent Person considers adequate for the purpose of | ||
| reporting. |
Section 2 Reporting of Exploration Results
(Criteria in this section apply to all succeeding sections.)
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Mineral Tenement | Type, reference name/number, location and ownership | The historic Dutchman/Harts, Curnows, Taylors, Planet and Wallaroo |
| and land tenure | including agreements or material issues with third parties such | mines are all located within EL7800, comprising 67 units in |
| status | as joint ventures, partnerships, overriding royalties, native title | 1:1,000,000 Armidale, located NE of Emmaville. |
| interests, historical sites, wilderness or national parks and | EL 7800 is owned 100% by Aus Tin Mining Limited and was | |
| environmental settings. | approved for renewal for two years by NSW Trade & Investment in | |
| The security of the tenure held at the time of reporting along | July 2013. | |
| with any known impediments to obtaining a licence to operate | ||
| in the area. | ||
| Exploration done | Acknowledge and appraisal of exploration by other parties | Dutchman/Harts were mined between 1875 and 1959 and Carpentaria |
| by other parties | Exploration Company reported historic production of 71,000tonnes of | |
| ore and 2,759tonnes of metallic tin. Processing was reported to be | ||
| rudimentary with an estimated recovery of 60% implying a head grade | ||
| of 4.5%Sn. In the early 1960’s, BHP undertook a program of | ||
| exploration and rehabilitation. Between 2006 and 2011 YTC | ||
| Resources completed a Gradient Array Induced Polarisation Survey | ||
| (IP) and diamond drilling. | ||
| Taylors has been historicallymined byboth elluvial and alluvial |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
| Criteria | JORC Code explanation | JORC Code explanation | Commentary |
|---|---|---|---|
| methods. During the period 1969 and 1974 a private consortium | |||
| undertook a diamond and percussion drilling program. | |||
| Planet Mine was mined between 1872 and 1931 by a number of | |||
| companies. Pacific Copper completed various exploration activities | |||
| between 1980 and 1984, including a magnetic survey and diamond | |||
| drilling program. | |||
| Wallaroo was mined 1882 between 1944. Aberfoyle undertook limited | |||
| explorationbetween 1981and1982 includingrockchip sampling. | |||
| Geology | | Deposit type, geological setting and style of mineralisation | Dutchman/Harts & Curnows – Lodes of mineralisation (quartz- |
| chlorite-cassiterite) up to 120m long and 100m deep and thought to e | |||
| related to the intersection of spur veins resulting in a shoot | |||
| enrichment usually in north-east trend. | |||
| Taylors - Three main lodes (cassiterite-quartz, wolframite-cassiterite- | |||
| quartz-chlorite, wolframite-bismuth-molybdenite-cassiterite). The | |||
| Taronga Tin deposit is a sheeted vein system that comprises two | |||
| main zones of mineralisation, the Northern Zone and Southern Zone | |||
| which are approximately 300 metres apart. Over 90% of the tin is | |||
| situated within quartz vein boundaries and occurs predominantly as | |||
| cassiterite. | |||
| Planet - A broad, elongated cluster of collapsed shafts, pits, trenches | |||
| and costeans are developed on multiple quartz-sulphide-cassiterite | |||
| veins in cleaved to massive volcanics. Black cassiterite occurs on the | |||
| vein margins as massive aggregates and disseminations whilst | |||
| sulphide, dominated by arsenopyrite, occur throughout the silicified | |||
| and bleached wallrock as veins and irregular aggregates and | |||
| disseminated crystals. | |||
| Wallaroo – Thought to be an extension of one the Taylor’s lodes. | |||
| Lode varies from 0.3m to 1.5m wide and consists of several parallel | |||
| lodes for a distance approximately 2.4km. Mineralisation comprises | |||
| quartz-chlorite-cassiterite. | |||
| Drill hole | | A summary of all information material to the understanding of | A summary of significant intersections for each target is provided in |
| information | the exploration results including a tabulation of the following | Appendix 1. | |
| information for all Material drill holes: |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
o Easting and northing of the drill hole collar |
||
o Elevation or RL (Reduced Level – elevation above sea level |
||
| in metres) of the drill hole collar | ||
o Dip and azimuth |
||
o Down hole length and interception depth |
||
o Hole length |
||
| If the exclusion of this information is justified on the basis that | ||
| the information is not Material and this exclusion does not | ||
| detract from the understanding of this report, the Competent | ||
| Person should clearly explain why this is the case | ||
| Data aggregation | In reporting Exploration Results, weighting averaging | Dutchman/Harts – no details reported for historical drilling. YTC |
| methods | techniques, maximum and/or minimum grade truncations (eg | collected and reported data on one metre intervals. |
| cutting of high grades) and cut-off grades are usually Material | Taylors - individual samples were taken over intervals of 5ft and | |
| and should be stated. | assayed for bismuth, molybdenum, tin and tungsten. No details are | |
| Where aggregate intercepts incorporate short lengths of high | provided on averaging techniques or grade truncations. | |
| grade results and longer lengths of low grade results, the | Planet – individual samples were taken over varying intersections, | |
| procedure used for such aggregation should be stated and | with Pacific Copper reporting results for tin, zinc, arsenic, copper and | |
| some typical examples of such aggregation should be shown | lead. YTC collected and reported data on one metre intervals. | |
| in detail. | Wallaroo – no drilling results are reported. | |
| The assumptions used for any reporting of metal equivalent | ||
| values should be clearly stated. | ||
| Relationship | These relationships are particularly important in the reporting | Dutchman/Harts – For MCP drilling, no geological logs are available. |
| between mineralisation widths and intercept lengths |
of Exploration Results. If the geometry of the mineralization with respect to the drill hole angle is known, it’s nature should be reported. If it is not known and only the down hole lengths are reported, |
Taylors – geological logs are not available. Planet – For Pacific Copper PT1, massive tin vein was observed between 89.8m to 90.8m but orientation of mineralisation difficult to determine due to extensive chloritisation. |
| there should be a clear statement to this effect (eg ‘down hole | Wallaroo – no drilling results are reported. | |
| _length, true width not known’). _ | ||
| Diagrams | Appropriate maps and sections (with scales) and tabulations of | Figure 1 for general location |
| intercepts should be included for any significant discovery | Given limited availability of information for some targets and the | |
| being reported. These should include, but not limited to a plan | purpose of the current evaluation is aimed at developing future |
|
| view of drill hole collar locations and appropriate sectional | exploration targets, detailed maps includingcollar locations and |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| views. | sectional views have not beenprepared. | |
| Balanced reporting | Where comprehensive reporting of all Exploration Results is |
Reported results are for significant intersections only, and given |
| not practical, representative reporting of both low and high | limited availability of information for some targets and the purpose of | |
| grades and/or widths should be practices to avoid misleading | the current evaluation is aimed at developing future exploration | |
| reporting of Exploration Results. | targets, the level of reportingis considered appropriate. | |
| Other substantive | Other exploration data, if meaningful and material, should be | Dutchman/Harts – geological logs are not available for MCP drilling. |
| exploration data | reported including (but not limited to); geological observations; | Taylors – geological logs are not available |
| geophysical results; geochemical survey results; bulk samples | Planet – geological log is available for PT1. Massive tin vein | |
| – size and method of treatment; metallurgical test results; bulk | observed between 89.8m to 90.8m but orientation of mineralisation | |
| density; groundwater; geotechnical and rock characteristics, | difficult to determine due to extensive chloritisation. | |
| potential deleterious or contaminating substances. | Wallaroo – no drilling results are reported | |
| Further work | The nature and scale of planned further work (eg tests for | A program to undertaken further work will be determined in |
| lateral extensions or depth extensions or large-scale step-out | conjunction with the Taronga Tin Project Definitive Feasibility Study. | |
| drilling). | ||
| Diagrams clearly highlighting the areas of possible extensions, | ||
| including the main geological interpretations and future drilling | ||
| areas,provided this information is not commercially sensitive. |
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681
Appendix 1 Significant Historical Drilling Intersections
| Hole ID | Operator | Date | Type | East | North | RL | Dip | Azi | Assay | From | To | Est True | Sn |
**WO3 ** | Mo | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Completed | MGA | **type ** | Width | |||||||||||||
| Dutchman/Harts & Curnows | ||||||||||||||||
| HUp12 | MCP | Sludge | 8.53m | 12.19m | 3.66m | 2.54% | ||||||||||
| Sludge | 10.36m | 12.19m | 0.61m | 11.22% | ||||||||||||
| HD04 | YTC | 5.12.07 | Diamond | 371 973 | 675 512 |
60⁰ | 346⁰ | 40.7m | 41.5m | 0.8m | 3.64% | 10ppm | <1ppm | |||
| 60.0m | 61.0m | 1.0m | 1.23% | 90ppm | <0.5ppm | |||||||||||
| Taylors(Ref GS1969/569 & GS1975/294) | ||||||||||||||||
| GC8 | Percussion | 170E |
780S | 45⁰ | 150⁰ | N/A | 20ft | 25ft | 3.5ft | 0.70% | 42ppm | ‐ | ||||
| GC9 | Percussion | 205S |
820S | 45⁰ | 130⁰ | N/A | 80ft | 85fy | 3.5ft | 200ppm | 3.61% | 140ppm | ||||
| Planet(Pacific Copper ‐ Ref 1983 090) | ||||||||||||||||
| PT1 | PC | 19.12.83 | Diamond | 1127E | 1077N | 1056 | 75⁰ | 250⁰ | 89.8m | 90.06m | 0.26m | 4.78% | ||||
| 90.06m | 90.3m | 0.25m | 57.0% | |||||||||||||
| 90.3m | 90.8m | 0.5m | 1.1% | |||||||||||||
| SD01 | YTC | 29.10.07 | Diamond | 382 289 | 675 49 |
1056 | 50⁰ | 215⁰ | 109m | 110m | 1.0m | 3.74% | ||||
Operator
MCP – Minerals & Chemical Philipps
YTC‐ YTC Resources Limited
PC – Pacific Copper Limited
Aus Tin Mining Limited Level 27, 111 Eagle Street, Brisbane, Qld 4000 (GPO Box 5261) Phone: 07 3303 0611, Fax: 07‐3303 0681