Wir nutzen Cookies, um Ihren Besuch auf unserer Website und unseren Service zu optimieren.
Wir betrachten die weitere Nutzung unserer Website als Zustimmung zu der Verwendung von Cookies.
PortalDerWirtschaft.de



Suchmaschinenoptimierung mit PdW
mit Content-Marketing - Ihre News

Altona Mining Ltd.: Project Cloncurry: Ressourcen-Upgrade Bedford

Von Altona Mining Ltd.

Altona Mining Ltd.: Project Cloncurry: Ressourcen-Upgrade Bedford - Die Mineralressource der Lagerst√§tte Bedford erh√∂hte sich auf 4,8 Mio. Tonnen mit 0,80% Kupfer und 0,21 g/t Gold. - Zunahme des enthaltenen Kupfermetalls um 124% und des enthaltenen Goldes um 191%. - Die gesamte Mineralressource des Projekts Cloncurry betr√§gt jetzt 1,67 Mio. Tonnen enthaltenes Kupfer und 0,4 Mio. Unzen enthaltenes Gold. Altona Mining Limited (Altona oder das Unternehmen - http://www.commodity-tv.net/c/mid,5428,Company_Updates/?v=297328) gibt eine neue Mineralressourcensch√§tzung f√ľr die Lagerst√§tte Bedford bekannt. Die Lagerst√§tte befindet sich auf dem sich vollst√§ndig in Unternehmensbesitz befindlichen Kupferprojekt Cloncurry in der N√§he des Mt Isa in Quensland. Bedford liegt 6km s√ľd√∂stlich der geplanten Tagebaumine und Aufbereitungsanlage Little Eva und befindet sich auf bewilligten Bergbaupachtgebieten. Die neue Ressourcensch√§tzung umfasst: 4,8 Mio. Tonnen mit 0,80% Kupfer und 0,21 g/t Gold f√ľr 38.000 Tonnen enthaltenes Kupfer und 32.000 Unzen enthaltenes Gold. Die Ressource wird zu einem unteren Cut-Off-Gehalt von 0,3% angegeben und ist als angezeigt und geschlussfolgert klassifiziert. Eine vollst√§ndige Aufstellung finden Sie in Tabelle 1 und 2. Eine detaillierte Zusammenfassung der Hilfsdaten und Methodik wird in Anhang 1, der Tabelle 1 der 2012 Edition of the JORC Code gegeben. Die gesamte Mineralressource des Projekts Cloncurry betr√§gt jetzt: 290 Mio. Tonnen mit 0,58% Kupfer, 0,05 g/t Gold f√ľr 1,67 Mio. Tonnen enthaltenes Kupfer und 0,4 Mio. Unzen enthaltenes Gold (Appendix 2). Die neue Mineralressourcensch√§tzung f√ľr Bradford basiert auf einem neuen geologischen Modell, das durch detaillierte Oberfl√§chengeochemie und geologische Kartierungen gest√ľtzt wird. Das neue Modell wurde ebenfalls von zwei zus√§tzlichen Kernbohrungen gest√ľtzt, die f√ľr metallurgische Proben und geotechnische Studien niedergebracht wurden. F√ľr die Mineralressource wird nur sulfidisches Erz angegeben, das sich von 20m bis 140m unter die Oberfl√§che erstreckt. Eine Oxidationszone, die sich von der Oberfl√§che bis in Tiefen von 20m bis 30m erstreckt, wurde in die Ressourcensch√§tzung nicht eingeschlossen. Die Zunahme gegen√ľber der Sch√§tzung aus dem Jahr 2012 ist in erster Linie das Ergebnis des besseren Verst√§ndnisses der Kontinuit√§t und der Geometrie. Basierend auf Kartierungen der √ľbert√§gigen Abbaust√§tten und einer h√∂her aufl√∂senden Beprobung des Kupfers im Boden konnten die vererzten Strukturen besser abgegrenzt werden. Eine Zunahme der Tonnage resultiert aus neuen Dichtedaten, die aus Bohrkernen gewonnen wurden im Gegensatz zu fr√ľheren konservativen Sch√§tzungen. Die Lagerst√§tte Bedford ist Teil der Minenentwicklung Little Eva und der Produktionsbeginn ist im Jahr 2 des Minenplans vorgesehen. Das neue Modell deutet das Potenzial zur Erweiterung der Erzvorr√§te Bedford an. Optimierungen der Tagebaugrube sind als Teil der Projektoptimierung geplant. Geologie Die Lagerst√§tte Bedford ist ein Eisen-Oxid-Kupfer-Gold (IOCG) -Vererzungssystem, das f√ľr den Bezirk Cloncurry typisch ist. Die benachbarte Lagerst√§tte Little Eva ist eine typischere IOCG-Lagerst√§tte mit √Ąhnlichkeiten zur gro√üen Lagerst√§tte Ernest Henry 70km s√ľd√∂stlich. Die Lagerst√§tte ist in einer steil nach Westen einfallenden Scherzone beherbergt, die nach Norden bis Nordnordost streicht. Die Scherzone ist zwischen 50 und 120m m√§chtig. Darin kommen gestaffelte und √ľberlappende vererzte Strukturen vor. Am besten ist die Vererzung √ľber eine Streichl√§nge von 2,5km in zwei getrennten Zonen entwickelt, Bedford North und Bedford South. Individuell vererzte Strukturen in Verbindung mit Erzgehalten (>0,3% Kupfer) besitzen wahre M√§chtigkeiten zwischen 5 und 12m. Die Stratigrafie der Wirtsgesteine umfasst ein Nord- bis Nordnordoststreichen, m√§√üig bis steil nach Westen einfallende geschichtete Abfolge von Amphibolit- und Biotitschiefer. In diese Gesteinsabfolge drangen konkordant Granit und pegmatit√§hnliche Intrusions-/Lagerg√§nge ein. Die vererzten Strukturen in Bedford South sind zum gr√∂√üten Teil schichtungsparallel. Laut Interpretation streichen die vererzten Strukturen in Bedford North von Nord nach S√ľd und kreuzen die nach Norden bis Nordost streichende Stratigrafie. Sekund√§re nach Nord bis Nordost streichende Zwischenstrukturen werden entlang der Schichtung/Schieferung gefunden. Magnetit-Biotit-Alterationsparagenesen mit Quarzg√§ngen kommen konzentriert in den vererzten Strukturen mit einer starken Feldspat-H√§matit-Alteration im Liegenden vor. Das dominante Erzmineral ist grobk√∂rniger Kupferkies (mit untergeordnet Magnetit, Pyrit, Magnetkies und Gold), der innerhalb von Quarzg√§ngen, Brekzienf√ľllungen und eingesprengt im Wirtsgestein vorkommt. Die Lagerst√§tte ist an der Oberfl√§che nicht aufgeschlossen. Eine unregelm√§√üige 20 bis 30m m√§chtige Verwitterungszone mit sekund√§rer Kupferoxidvererzung bedeckt die Lagerst√§tte. Ressourcendefinition und Modellierung Die Bohrungen werden zum gr√∂√üten Teil in Abst√§nden von ungef√§hr 25m im Streichen und 25m in Fallrichtung √ľber den Hauptzonen niedergebracht. Die Abst√§nde zwischen den Bohrlinien nehmen im Streichen von den Hauptzonen auf 100m zu. Die Bohrungen umfassen 99 RC- und 2 Kernbohrungen mit einer Gesamtl√§nge von 10.139m. Alle Bohrungen wurden von West nach Ost niedergebracht, um die ungef√§hren wahren M√§chtigkeiten der Vererzung zu durchteufen. Die RC-Bohrungen wurden mittels eines Face Sampling Bohrhammers durchgef√ľhrt. Eine kleine Anzahl von RAB-Bohrungen (13) wurde verwendet, wo keine anderen Daten zur Verf√ľgung standen und die aus RAB-Daten abgeleiteten Ressourcen werden als geschlussfolgert klassifiziert. Die Proben wurden routinem√§√üig in 1m-Abst√§nden f√ľr das Protokollieren und Analyse gesammelt. Alle Proben wurden zur Multielement-ICPAES und/oder AAS-Analyse an angesehene Labors geschickt. Qualit√§tssicherungs-/Qualit√§tskontrollproben wurden routinem√§√üig zugegeben und √ľberwacht. Die Qualit√§ts√ľberwachung gew√§hrleistete, dass die Genauigkeit und Pr√§zision dieser Analyse akzeptabel ist. Geologische 3D-Modelle, die aus den Daten der √ľbert√§gigen Kartierungen, detaillierten Oberfl√§chengeochemie und den Bohrungen erstellt wurden, wurden zum Beleg der Ressourcensch√§tzung verwendet. Die Ressourcensch√§tzung wurde mittels Blockmodellmethodologien im Einklang mit geplanten semiselektiven Bergbauparametern durchgef√ľhrt. Kupfer- und Goldgehalte wurden mittels herk√∂mmlichen Kriging im Blockma√üstab gesch√§tzt. Eine Nachbereitung der Daten durch gleichm√§√üiges Konditionieren wurde angewandt, um Blockgehalte mit einem selektiven Bergbauma√üstab zu sch√§tzen. In situ Dichtewerte basieren auf physikalischen Messungen, die an Bohrkernen durchgef√ľhrt wurden, und auf Vergleichsdaten aus den benachbarten Lagerst√§tten. F√ľr Fragen wenden Sie sich bitte an: Alistair Cowden Managing Director Altona Mining Limited Tel: +61 8 9485 2929 altona@altonamining.com David Tasker Professional Public Relations Perth Tel: +61 8 9388 0944 David.Tasker@ppr.com.au Jochen Staiger Swiss Resource Capital AG Tel: +41 71 354 8501 js@resource-capital.ch √úber Altona Altona Mining Limited ist ein an der ASX notiertes Unternehmen, das sich auf das Projekt Cloncurry in Queensland, Australien, konzentriert. Das Projekt beherbergt Mineralressourcen, die ungef√§hr 1,65 Mio. Tonnen Kupfer und 0,41 Mio. Unzen Gold enthalten. Es ist vorgesehen, eine Kupfer-Gold-Tagebaumine und Aufbereitungsanlage mit einer Kapazit√§t von 7 Mio. Tonnen pro Jahr zu entwickeln. Die Entwicklung ist genehmigt mit einer geplanten Jahresproduktion1 von 38.800 t Kupfer und 17.200 Unzen Gold √ľber mindestens 13 Jahre. Eine endg√ľltige Machbarkeitsstudie wurde im M√§rz 2014 ver√∂ffentlicht. Altona hat eine Rahmenvereinbarung mit Sichuan Railway Investment Group zur vollst√§ndigen Finanzierung und Entwicklung des Projekts durch deren Tochtergesellschaft in Hongkong, China Sichuan International Investment Limited, geschlossen. Der Abschluss der Transaktion ist vor dem 31. Juli 2017 geplant. 1Bitte beziehen Sie sich auf die ASX-Pressemitteilung Cost Review Delivers Major Upgrade to Little Eva vom 13. M√§rz 2014, die die Information bez√ľglich dieses Produktionsziels und die prognostizierte Finanzinformation, die auf diesem Produktionsziel basiert, zusammenfasst. Das Unternehmen best√§tigt, dass alle wesentlichen Annahmen, die das Produktionsziel unterst√ľtzen und die auf diesem Produktionsziel basierenden Finanzprognosen, die in der oben genannten Pressemitteilung erw√§hnt werden, weiterhin g√ľltig sind und sich nicht wesentlich ge√§ndert haben. Aussage der kompetenten Person Die Informationen in diesem Beicht, die sich auf Explorationsziele, Explorationsergebnisse, Mineralressourcen oder Erzvorr√§te beziehen, basieren auf einem Bericht von Herrn Frank Browning, MSci (Hons), MSc, GAIG. Herr Browning ist ein Vollzeit-Mitarbeiter des Unternehmens und verf√ľgt √ľber f√ľnf Jahre der entsprechenden Erfahrung. Er ist aber kein Vollmitglied der AIG. Der Bericht wurde von Herrn Roland Bartsch, BSc (Hons), MSc, MAusIMM betreut und gepr√ľft und diese Pressemitteilung beruht auf von Herrn Bartsch zusammengestellten Informationen. Herr Bartsch ist ein Vollzeit-Mitarbeiter des Unternehmens und verf√ľgt √ľber ausreichendes Wissen und Erfahrung √ľber diesen hier vorliegenden Vererzungs- und Lagerst√§ttentyp. Seine T√§tigkeiten qualifizieren ihn als kompetente Person gem√§√ü den Regeln des 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Herr Bartsch stimmt den hier eingef√ľgten Informationen, die auf seinen Informationen basieren, in Form und Kontext je nach Erscheinen zu. Die Ausgangssprache (in der Regel Englisch), in der der Originaltext ver√∂ffentlicht wird, ist die offizielle, autorisierte und rechtsg√ľltige Version. Diese √úbersetzung wird zur besseren Verst√§ndigung mitgeliefert. Die deutschsprachige Fassung kann gek√ľrzt oder zusammengefasst sein. Es wird keine Verantwortung oder Haftung: f√ľr den Inhalt, f√ľr die Richtigkeit, der Angemessenheit oder der Genauigkeit dieser √úbersetzung √ľbernommen. Aus Sicht des √úbersetzers stellt die Meldung keine Kauf- oder Verkaufsempfehlung dar! Bitte beachten Sie die englische Originalmeldung auf www.sedar.com , www.sec.gov , www.asx.com.au/ oder auf der Firmenwebsite! Tabelle 1: Bedford Mineralressource bei 0.3% Kupfer Cut-off Tonnen Kupfer (%Gold EnthalteneEnthaltene (Mio.) ) (g/t) s s Kupfer Gold (Tonnen) (Unzen) erkunde- - - - - t angezei2.3 0.95 0.23 22,000 17,000 gt geschlu2.5 0.66 0.19 16,000 15,000 ssfolge rt Total 4.8 0.80 0.21 38,000 32,000 Anmerkung: Gesamtsummen k√∂nnten aufgrund Rundens abweichen. Tabelle 2: Bedford Mineralressource bei verschiedenen Cut-off-Gehalten Cut-off GTonnen Kupfer EnthaltenGold Enthalten ehalt (Mio.) (%) es (g/t) es Kupfer Gold (% Cu) (Tonnen) (Unzen) 0 29.2 0.19 56 0. 51 ,000 06 ,000 0.15 7.1 0.61 43,000 0.17 39,000 0.2 5.9 0.70 41,000 0.19 36,000 0.3R 4.8 0.80 38,000 0.21 32,000 0.4 4.1 0.88 36,000 0.22 29,000 0.5 3.4 0.97 33,000 0.24 26,000 R F√ľr Mineralressource angegebener Cut-Off-Gehalt. Tabelle 3: Vergleich der Bedford Mineralressourcesdchaetzungen ueber Cut-off-Gehalt von 0.3% Kupfer Tonnen Kupfer (%Gold EnthaltenEnthalten (Mio.) ) (g/t) es es Kupfer Gold (Tonnen) (Unzen) 2017 Sch√§t4.8 0.80 0.21 38,000 32,000 zung 2012 Sch√§t1.7 0.99 0.20 17,000 11,000 zung % √Ąnderung182% -19% 5% 124% 191% http://www.irw-press.at/prcom/images/messages/2017/39181/Altona_DE_NEU.001.jpeg Figure 1: Cloncurry Project location map http://www.irw-press.at/prcom/images/messages/2017/39181/Altona_DE_NEU.002.jpeg Figure 2: Little Eva Project layout including Bedford http://www.irw-press.at/prcom/images/messages/2017/39181/Altona_DE_NEU.003.png Figure 3: Bedford North block model cross section N7767750. Block colour represents ordinary kriging derived copper grade. Estimation domains and surface datasets utilised in modelling are also labelled http://www.irw-press.at/prcom/images/messages/2017/39181/Altona_DE_NEU.004.png Figure 4: Bedford South block model cross section N7766425. Block colour represents ordinary kriging derived copper grade. Estimation domains and surface datasets utilised in modelling are also labelled http://www.irw-press.at/prcom/images/messages/2017/39181/Altona_DE_NEU.005.png Figure 5: Oblique three dimensional view (looking northeast) of the classified resource model excluding oxide (Unclassified) and low grade envelope domains (Inferred) APPENDIX 1: TABLE 1 OF THE 2012 EDITION OF THE JORC CODE The table below is a description of the assessment and reporting criteria used in reporting the Exploration Results that reflects those presented in Table 1 of The Australasian Code for the Reporting of Exploration Results, Mineral Resources and Ore Reserves. Section 1: Sampling Techniques and Data Criteria Commentary Sampling ¬∑ The drilling dataset incorporates 24 Rotary techniqu Air Blast (RAB), 99 Reverse Circulation (RC) es and 2 diamond drill holes for a total of 11,061m. ¬∑ RAB accounts for 8% of drilled metres and was only utilised in the absence of RC or DD sampling (13 holes w ithin resource area ), where the tenor and thickness of mineralisation is consistent with results from adjacent drill sections and overlying Cu-in-soil geochemistry. All mineralisation delineated by RAB drilling is classified as Inferred Resources. ¬∑ 84% of samples were collected at 1m intervals. The remainder were collected at 2m intervals, with a small quantity of partial metre sample lengths (<1%). ¬∑ Approximately 2-3kg sample weights were obtained from each interval for geochemical analysis. ¬∑ 2 RC drillholes were completed by CRAE in 1990 (1.6% of drilling dataset). All remaining drilling was conducted by Altona Mining (or precursor company Universal Resources) between 2003 and 2015. ¬∑ CRAE RC and Universal RAB sampling procedures are not available. ¬∑ Altona RC samples were collected directly using a trailer mounted cyclone and cone (35%) or triple deck riffle splitter (65%). A small number of wet intervals were sub-sampled with a scoop (<1%). ¬∑ Altona diamond core sampling was guided by geology, with quarter or half core submitted for analysis. ¬∑ All samples were collected into pre-numbered calico bags, packed by Altona staff into polyweave or bulka bags and shipped by truck to laboratories in Townsville. Drilling ¬∑ RAB drilling specifications are not available. techniqu¬∑ RC holes were drilled using 5.375, 5.5, or es 6 face sampling hammers. ¬∑ HQ3 and NQ3 core sizes were used in diamond drilling. ¬∑ Holes were drilled at a dip angle of ~-60o to intersect mineralisation at optimal true width angles. Drill ¬∑ Core recovery was measured and RC sample sample recovery visually estimated. recovery ¬∑ Recoveries are considered to be excellent averaging > 90%, and typically 100%. Lower recoveries were occasionally observed in the hole collars (top few metres). ¬∑ The majority of samples were dry. ¬∑ Every individual RC sample was collected into the cyclone prior to cone splitting. ¬∑ RC sample bias due to preferential loss/gain of fine/coarse material is considered well within acceptable limits. ¬∑ Best practice methods were used for diamond coring to ensure the return of high quality core samples. Logging ¬∑ All Altona drill holes were logged by geologists at the rig using Altona standard logging procedures. ¬∑ Altona logging was qualitative and quantitative including, colour, lithology, mineralisation, alteration, sulphide and oxide mineralogy, sulphide and oxide amount, texture, grain size and structure. ¬∑ Representative drill core and RC chips have been retained. Sub-sampl¬∑ CRAE RC and Universal RAB sampling procedures ing are not techniqu available es and . sample ¬∑ Altona RC samples were split at an 87.5% : preparat 12.5% ratio using cyclone and cone or riffle ion splitter to obtain a ~2-3kg sub-sample for analysis. Occasional wet intervals were sub-sampled using a scoop. ¬∑ Diamond core intervals were halved or quartered to produce sub-samples. ¬∑ Samples were sent to ALS or SGS Analabs Laboratories in Townsville for sample preparation and analysis. Both are independent commercial certified laboratories that use industry standard preparation including drying, crushing and pulverisation. ¬∑ Typical sub-sample sizes are considered representative for typical copper mineralisation in the Cloncurry Project area. Quality ¬∑ The majority of samples (98%) were analysed of at SGS Analabs in assay Townsville data as outlined below. and ¬∑ Copper was analysed using a mixed acid laborato digestion (hydrochloric, ry tests perchloric, hydrofluoric) followed by inductively coupled plasma atomic emission spectrometry (ICPAES) with a re- assay of ore grade (>1% Cu) samples by AAS . ¬∑ From 2003 to 2006 Gold was analysed using a 50g fusion followed by aqua regia digestion of the Au/Ag prill with a AAS determination. In 2009 Gold was analysed by fire assay with AAS finish. ¬∑ Quality Control comprised standards (certified reference materials for gold, copper and blanks) inserted into the sampling sequence at a ~1:20 ratio, to test the accuracy of laboratory analysis for each sample batch. Field duplicates were also collected at a ~1 : 20 ratio to control sampling precision, involving the riffle splitting of bulk RC samples or splitting of diamond core sub-samples. ¬∑ Duplicate data display acceptable accuracy and precision. Results for standard reference materials do not exhibit positive bias beyond Altonas two standard deviation benchmark. ¬∑ Field duplicate 2nd split were submitted to an u mpire laboratory on a 1:20 basis and compared well . ¬∑ No geophysical tools were used to determine the results reported here. Verificat¬∑ Results were checked by several Altona ion of personnel. sampling and ¬∑ No twinned holes. assaying¬∑ Field logging data was primarily collected using a laptop and uploaded into the company Datashed database and validated by company database personnel. ¬∑ All assay files were received in digital format from SGS Analabs Laboratory. Data was uploaded into the Altona Datashed database and validated by company database personnel. No manual data inserts took place. ¬∑ No adjustments have been applied to the results. Location ¬∑ CRAE collar locations were measured using a of data hand-held points GPS. ¬∑ Altona RC and diamond collar locations have been surveyed by licensed surveyors using a DGPS with approximately 0.1m or better horizontal accuracy. Elevation accuracy is considered to be less than 0.5m. RAB holes have reported accuracies from 0.005 to 3m. ¬∑ 25% of Altona RC and diamond drill holes have been down-hole surveyed with professional gyro systems, 6 9% have down-hole camera surveys and the remaining 6% have collar orientations only. ¬∑ The Grid is GDA94 MGA Zone 54. Data ¬∑ Drilling has typically been completed at 25m spacing intervals along 25m spaced east-west sections. and Section line spacing increases to 50-100m distribu outside the main mineralised tion zones. ¬∑ The majority of samples were collected at 1m downhole intervals. Other sample lengths do not exceed 2m. Orientati¬∑ Mineralisation in Bedford South strikes on of NNE-SSW, changing to a N-S orientation in data in Bedford North. Both zones exhibit steep relation westerly to dips. geologic al ¬∑ Drilling was completed to the east at -60 structur degree dip, such that with changing e mineralisation dip, true widths are estimated to vary from 80-100% of down hole intercepts. ¬∑ No bias is considered to result from drilling direction. Sample ¬∑ Samples from RC and diamond drilling were security collected and bagged into pre-numbered calico bags at the drill site during the drilling operation. Unique sample numbers were retained during the whole process. ¬∑ Samples were collected and delivered to SGS Analabs as they were collected. ¬∑ Samples were stored in Altona facilities in Cloncurry prior to transport to Townsville. ¬∑ All samples were then catalogued and sealed prior to dispatch to laboratory by Altona staff. Audits ¬∑ QA/QC samples were routinely monitored by the or database manager and geologist on a batch and reviews campaign basis. The accuracy of key elements such Cu and Au, was acceptable and the field duplicate assay data was unbiased and shows an acceptable level of precision. ¬∑ No external audits or reviews have been undertaken. Section 2: Reporting of Exploration Results Criteria Commentary Mineral ¬∑ Bedford is within Mining Lease 90164; 100% tenement owned by Altona and Mining. land tenure ¬∑ No joint ventures apply. status ¬∑ There are agreements in place with the native title holders, the Kalkadoon people and with landholders. ¬∑ No significant historic sites or national parks are located within the reported exploration site. ¬∑ The Mining Lease was granted in late 2012 and is in good standing. Explorati¬∑ CRAE completed mapping (Bedford South) and on done ground magnetics, followed by 5 reconnaissance by RC drill holes in other 1990. parties ¬∑ Universal Resources completed RAB (43 holes), followed by RC (97 holes) and diamond drilling (3 holes) from 2003 to 2009. ¬∑ Altona Mining completed an additional diamond drill hole in 2015, as well as assaying a previously unsampled geotechnical diamond hole. ¬∑ In 2015 Altona also completed detailed mapping and high resolution soil sampling over Bedford North on a 20 x 10m spacing. Geology ¬∑ Bedford deposit is interpreted to be part of the broader Iron-Oxide-Copper Gold (IOCG) style mineral system common to the Cloncurry district. ¬∑ Bedford host lithology is characterised by a north to north northeast striking, steep west dipping interlayered sequence of amphibolite and biotite schist, underlain by psammite and intruded concordantly by planar granite and pegmatite intrusions. ¬∑ Alteration appears to be zoned, with magnetite-biotite alteration and quartz veining concentrated in ore zones, above a strongly feldspar-hematite altered foot wall. ¬∑ Sulphide mineralisation is associated with a steep west dipping shear zone and comprises chalcopyrite and pyrite in planar bodies that can be parallel or slightly oblique to bedding. Copper oxide species occur above top of fresh rock, in a ~20 to 30m zone of variably weathered bedrock. ¬∑ Ore formation is interpreted to be structurally controlled, with brittle fracturing facilitating hydrothermal fluid flow and accommodation of metal sulphide precipitation. Structural development at interfaces between rocks of contrasting competency is evident . Moderate to shallow northerly plunging ore shoots are interpreted to be the result of the low angle in tersection of transgressive mineralised structur es and more competent stratigraphy. Drill ¬∑ Exploration results are not being reported hole for the Mineral Resource area. Drill hole Informat information is provided in the Mineral ion Resource estimation section. Data ¬∑ Exploration results are not being reported aggregat for the Mineral Resource ion area. methods Relations¬∑ Exploration results are not being reported hip for the Mineral Resource between area. minerali sation ¬∑ Drilling azimuths are considered to be widths approximately perpendicular to the strike and and dip of the mineralisation resulting in intercep unbiased true t widths. lengths Diagrams ¬∑ Refer to the Figures 1 to 5. Balanced ¬∑ Exploration results are not being reported reportin for the Mineral Resource g area. Other ¬∑ Exploration results are not being reported substant for the Mineral Resource ive area. explorat ion data Further ¬∑ Additional work in the future will consist of work diamond core drilling for metallurgical and/or geotechnical testwork sampling, as well as infill and exploration step-out RC drilling for resource definition purposes. Section 3: Estimation and Reporting of Mineral Resources Criteria Commentary Database ¬∑ Data used for estimation is stored within a integrit SQL Server database and is managed using y DataShed software. The structure of the drilling and sampling data is based on the Maxwell Data Model. ¬∑ Drill data is logged directly into digital logging systems and uploaded to the database by the database administrator (Altona standard procedures since 2005). ¬∑ Laboratory data has been received in digital format and uploaded directly to the database. (Altona standard procedures since 2002). ¬∑ In both cases the data was validated on entry to the database, by a variety of means, including the enforcement of coding standards, constraints and triggers. These are features built into the data model that ensure that the data meets essential standards of validity and consistency. ¬∑ Original data sheets and files have been retained and are used to validate the contents of the database against the original logging. ¬∑ Validation of existing collar, downhole survey and assay data was completed. Validation steps included: ¬∑ Drillhole collar locations were compared to the topographic surface. ¬∑ Downhole deviations of all drillhole traces were examined and problematic surveys were excluded. ¬∑ All data (e.g. assay, bulk density, RQDs, core recovery) was checked for incorrect values by deriving minimum and maximum values. ¬∑ Lithology data was checked to ensure standard rock type codes were used. ¬∑ Meta-data fields were checked to ensure they were populated and that the data recorded was consistent. Site ¬∑ Numerous site visits have been undertaken by visits Mr Bartsch and Mr Browning. Geologica¬∑ Confidence in the geological interpretation l of the deposit is moderate to high. Good local interpre constraints exist on the spatial extent and tation geometry of separate lithological and structural components through the integrated analysis of surface mapping, surface geochemistry, surface geophysics, drill hole logging, downhole geochemistry, magnetic susceptibility and radiometrics. Drilling and high resolution soil samp ling (10mE by 25mN) provide good deposit scale constraints on the geometry and continuity of mineralisation. ¬∑ Bedford deposit is interpreted to be part of the broader Iron-Oxide-Copper Gold (IOCG) style mineral system common to the Cloncurry district. ¬∑ Mineralisation occurs at surface, is exposed in sub-crop, and is confirmed through drilling in the main zones down dip to ~140m vertical depth below surface. ¬∑ The deposit is hosted within a steep west dipping shear zone striking north to north northeast. The shear zone varies from 50 to 120m wide with internal arrays of mineralised structures. ¬∑ Mineralisation has been defined in two separate zones, Bedford North and Bedford South, the shear zone is however through going. The overall deposit extends over a strike length of 2.5km; the northern zone 1.15km and southern zone 850m long. Within the shear zone individual mineralised structures associated with ore grade mineralisation (>0.3% copper) are planar and have true widths ranging from 5 to 12m. ¬∑ Host stratigraphy comprises a north to north northeast striking, moderate to steep west dipping interlayered sequence of amphibolite and biotite schist, underlain by psammite and intruded concordantly by narrow planar granite and pegmatoidal dykes/sills. ¬∑ In Bedford South mineralised structures are interpreted to be bedding/foliation parallel. In Bedford North the main mineralised structures are interpreted to trend north-south stepping across north northeast striking stratigraphy, with the development of a set of secondary north northeast linking structures along bedding/foliation. Moderate to shallow northerly plunging ore shoots are interpreted to be the result of the low angle intersection of transgressive mineralised structures and more competent stratigraphy. ¬∑ Magnetite-biotite alteration and quartz veining are concentrated in the ore zones, above a strongly feldspar-hematite altered foot wall. ¬∑ The dominant ore mineral is coarse grained chalcopyrite (with minor magnetite, pyrite, pyrrhotite and gold) which occurs within quartz veins, breccia fill and disseminations within the host shear zone. ¬∑ An irregular 20 to 30m thick zone of weathering with oxide mineralisation blankets the deposit. Although the top of fresh rock is well defined variability of copper mineral species within the weathering profile is not well understood. ¬∑ Geological interpretation was completed on a sectional basis; from which polylines were interpolated to create 3D solid wireframes for mineralisation and surfaces for weathering interfaces. ¬∑ The main mineralisation domains were defined using grade constraints. A nominal cut-off grade of 0.3% Cu was used to define boundaries between strongly mineralised structures and a weakly-mineralised low grade envelope, which was itself separated from unmineralised rock by a 0.1% Cu grade shell. ¬∑ Three main geological domains were defined based on observed internal consistency in geological characteristics: north-south trending mineralised structures, north-northeast trending linking mineralised structures and low grade envelopes. ¬∑ Statistical and geostatistical analysis verified the domain definition by confirming statistical homogeneity and the presence of distinct continuity characteristics. ¬∑ Contact analysis informed the selection of hard domain boundaries for estimation. ¬∑ All domains were further subdivided using a top of fresh rock surface to separate oxide mineralisation and primary sulphide mineralisation. Dimension¬∑ The main zone of mineralisation extends over s a strike length of 2.5km, including a distinct 1.15km long northern zone Bedford North and 850m long southern zone Bedford South. ¬∑ Mineralisation dips broadly west at 70-80¬į. ¬∑ Mineralisation occurs at surface, is exposed in sub-crop, and is confirmed through drilling in the main zones down dip to ~140m vertical depth below surface. - ¬∑ The deposit remains open to north and south along strike, down dip and between the two zones. Estimatio¬∑ Drillhole sample data was flagged from n and estimation domain modellin wireframes. g techniqu¬∑ Sample data was composited to a 1m downhole es length. ¬∑ The influence of extreme outliers was reduced by top-cutting, with top-cut levels determined by a combination of qualitative (grade histograms, lognormal probabilty plots) and quantitative analysis (decile analysis). Top-cuts were applied to nine gold and two copper samples, less than 1.5% of samples in affected domains. ¬∑ Variography was completed to characterise copper and gold continuity in each sulphide domain. Nugget varies greatly as a proportion of overall variance in different domains, recording changes in the degree of small scale variability and/or errors. High influence is modelled in the north-south mineralised structures, accounting for ~30% of copper and 13% of gold variability. Geometric anisotropy is consistent with the geological model, with variogram reference planes striking north to north-northeast and dipping steeply west (70-80¬į). A shallow (20-25¬į) northerly plunge is also evident on this plane. Directional variogram model ranges include: North-south mineralised structures - 54m along strike, 90m down dip, 3.8m across plane. North-northeast linking mineralised structures - 52m along strike, 30m down dip, 4m across plane. Low grade envelope - 55m along strike, 40m down dip, 6m across plane. ¬∑ Drillhole spacing ranges from 25m to 100m along strike; 25m on-section spacing is typical. ¬∑ Grade estimation was into parent blocks of 10mE by 20mN on 10mRL via ordinary kriging. ¬∑ Three estimation passes were completed with search ellipse orientations derived from principal directions of continuity in the variogram. Search distances in the first search were optimised by domain type using quantitative kriging neighbourhood analysis. These distances were doubled and subsequently trippled in the second and third estimation passes. ¬∑ Search parameters in the second and third estimation passes for the north-south trending mineralised structures were further optimised, with reduced minimum and optimum sample numbers improving local accuracy at the transitions between dense and sparse sample data. ¬∑ Post-processing of the ordinary kriged panel data by uniform conditioning was used to estimate copper grades at the selective mining unit (SMU) scale of 5mE by 5mN by 5mRL. ¬∑ The ordinary kriged copper and gold panel model grades were visually validated against the input drillhole data. Comparisons were also carried out between domain wireframe and domain block model volumes, average domain sample and domain block grades, as well as grade-tonnage curves for different estimation methods. Moisture ¬∑ Tonnes have been estimated on a dry basis. ¬∑ Moisture content has not been tested. Cut-off ¬∑ The Mineral Resource is reported above a 0.3% paramete copper cut-off grade and within 140m of the rs surface, to reflect current commodity prices and open pit mining. Mining ¬∑ Planned extraction is by open pit mining. factors ¬∑ Mining factors such as dilution and ore loss or have not been assumpti applied. ons Metallurg¬∑ No metallurgical assumptions have been built ical into the resource factors models. or assumpti¬∑ Preliminary metallurgical and mineralogical ons testing on samples from sulphide mineralisation support recovery and indicate that economic concentrate grades can be achieved. Environme¬∑ The Bedford resource is included as a ntal component of the Little Eva Project covered by factors a granted Environmental Authority or (EA). assumpti ons ¬∑ Baseline and ongoing studies form part of EA requirements. ¬∑ Analysis of simulated tailings fluids and solids prepared through laboratory scale test work indicates favourable environmental results for the neighbouring Little Eva deposit. Simulated sulphide and oxide tailings were found to be benign in terms of potential for formation of acidic, saline or metalliferous drainage. ¬∑ By nature of similar setting to Little Eva, in-part shared host rocks and low sulphide content, no adverse environmental considerations have been built into the resource model. Bulk ¬∑ 23 in-situ bulk density measurements were density collected by Altona personel from BFD163 in 2015. Values are based on physical measurements conducted on core samples using the weight in air / weight in water method. ¬∑ Samples were primarily collected from partially weathered rock. Excluding two outliers an average density of 2.78 was returned. ¬∑ In-situ bulk densities applied to the resource estimate are: oxidised rock 2.4 t/m 3, and, fresh rock 2.8 t/m3. These values are considered conservative. Classific¬∑ Bedford Mineral Resources have been ation classified on the basis of confidence in geological and grade continuity using the drilling density, geological model, modelled grade continuity, estimation passes and conditional bias measures (slope of the regression and kriging efficiency) as criteria. ¬∑ Measured Mineral Resources - none defined ¬∑ Indicated Mineral Resources - have been defined in areas where drill spacing is 25m by 25m or less, extending t o a down dip extent of up to 25m below drilling. Block grades were primarily calculated in the first estimation pass. Further drilling is percieved unlikely to result in material change. ¬∑ Inferred Mineral Resources have been defined in areas where extension of mineralisation is supported by sparse drill data (50-100m spacing along strike) and good continuity in Cu-in-soil anomalism. A significant proportion of block grades have been calculated in later estimation passes. ¬∑ The classification considers all available data and quality of the estimate and reflects the Competent Persons view of the deposit. Audits ¬∑ The geological interpretation, estimation or parameters and validation of the resource reviews models has been internally reviewed by Altona staff. Discussio¬∑ The assigned classification of Indicated and n or Inferred reflects the Competent Persons relative assessment of the accuracy and confidence accuracy levels in the Mineral Resource / confid estimate. ence APPENDIX 2: SUMMARY OF MINERAL RESOURCE ESTIMATES FOR THE CLONCURRY PROJECT DEPOSIT TOTAL CONTAINED MEASURED INDICATED INFERRED METAL TonneGrade CopperGold TonneGrade TonneGrade TonneGrade s s s milliCu Au tonnesouncesmilliCu Au milliCu Au milliCu Au on on on on % g/t % g/t % g/t % g/t LITTLE EVA PROJECT Little Eva105.90.52 0.09 546,00295,0037.1 0.60 0.09 45.0 0.46 0.08 23.9 0.50 0.10 0 0 Turkey 21.0 0.59 123,00- - - 17.7 0.59 3.4 0.58 - Creek 0 Ivy AnnA 7.5 0.57 0.07 43,00017,000- - - 5.4 0.60 0.08 2.1 0.49 0.06 Lady Clayr14.0 0.56 0.20 78,00085,000- - - 3.6 0.60 0.24 10.4 0.54 0.18 e A Bedford 4.8 0.80 0.21 38,00032,000- - - 2.3 0.95 0.23 2.5 0.66 0.19 Sub-to153.30.54 0.09 829,00430,0037.1 0.60 0.09 74.0 0.52 0.07 42.2 0.53 0.11 tal 0 0 OTHER DEPOSITS BlackardA 76.4 0.62 - 475,00- 27.0 0.68 - 6.6 0.60 - 42.7 0.59 - 0 ScanlanA 22.2 0.65 - 143,00- - - - 18.4 0.65 - 3.8 0.60 - 0 Longamundi10.4 0.66 - 69,000- - - - - - - 10.4 0.66 - A LegendA 17.4 0.54 - 94,000- - - - - - - 17.4 0.54 - Great Sout6.0 0.61 - 37,000- - - - - - - 6.0 0.61 - hern A CarolineA 3.6 0.53 - 19,000- - - - - - - 3.6 0.53 - Charlie Br0.7 0.40 - 3,000 - - - - - - - 0.7 0.40 - own A Sub-to136.70.61 - 840,00- 27.0 0.68 - 25.0 0.64 84.7 0.59 - tal 0 TOTAL 290.00.58 0.05 1,668,430,0064.1 0.63 0.05 99.0 0.55 0.05 126.90.57 0.04 000 0 A This information was prepared and first disclosed under the JORC Code 2004 Edition. It has not been updated since to comply with the JORC Code 2012 on the basis that the information has not materially changed since it was last reported. All other resources classified and reported in accordance with JORC Code 2012 edition. Note: Tonnages are dry metric tonnes and have been rounded, hence small differences may be present in the totals. See ASX release of 23 October 2007 and 26 July 2011 (Longamundi, Great Southern, Caroline and Charlie Brown), 23 April 2012 (Ivy Ann and Lady Clayre), 03 July 2012 (Blackard and Scanlan) and 22 August 2012 (Legend) for full details of resource estimation methodology and attributions. Little Eva is reported above a 0.2% copper lower cut-off grade, all other deposits are above 0.3% lower copper cut-off.
09. Mrz 2017

Bewerten Sie diesen Artikel

Noch nicht bewertet

Teilen Sie diesen Artikel

Keywords

Hinweis

Für den Inhalt der Pressemitteilung ist der Einsteller, Altona Mining Ltd., verantwortlich.

Pressemitteilungstext: 12069 Wörter, 45857 Zeichen. Artikel reklamieren

√úber Altona Mining Ltd.


Kommentar hinzuf√ľgen

Name*
E-Mail*
Institution
Website
Ihr Kommentar*
Bitte lösen Sie 4 + 6

Weitere Pressemeldungen von Altona Mining Ltd.


26.03.2018: Altona-Aktion√§re bef√ľrworten √úbernahmeangebot 26. M√§rz 2018 - Altona Mining Limited (Altona oder das Unternehmen - https:// www.youtube.com/ watch?v=LAggSMdXc0E) freut sich mitteilen zu k√∂nnen, dass anl√§sslich der heute stattgefundenen Versammlung (Scheme Meeting), die erforderliche Mehrheit der Aktion√§re von Altona dem √úbernahmeangebot zugestimmt hat, nach welchem die Copper Mountain Mining Corporation (CMMC) alle Altona-Aktien erwerben wird (Transaktion). Damit wird eine der verbliebenen Bedingungen aus der Urkunde zur Umsetzung der Verschmelzung (Merger Implementation Deed) erf√ľl... | Weiterlesen

19.02.2018: Angebotsunterlagen von Altona und Bericht des unabh√§ngigen Sachverst√§ndigen - Die Angebotsunterlagen (Scheme Book) wurden bei der ASIC eingereicht und an die Aktion√§re versandt. - Schlussfolgerung des unabh√§ngigen Sachverst√§ndigen: Die √úbernahmevereinbarung ist im besten Interesse der Aktion√§re. - Die Directors von Altona empfehlen den Aktion√§ren einstimmig, f√ľr die √úbernahme zu stimmen. - Die Sitzung zur √úbernahmevereinbarung findet am 26. M√§rz 2018 statt, die Umsetzung wird f√ľr den 18. April 2018 erwartet. Altona Mining Limited (Altona oder das Unternehmen https:// www.yout... | Weiterlesen

16.02.2018: Aktualisierung zum Übernahmeangebot Gericht genehmigt Versand der Angebotsunterlagen und Einberufung einer Aktionärsversammlung Altona Mining Limited (Altona oder das Unternehmen - http:// www.commodity-tv.net/ c/ search_adv/ ?v=298158) freut sich bekannt zu geben, dass der australische Bundesgerichtshof (Federal Court of Australia) in seinem Urteil den Versand der Angebotsunterlagen (Scheme Book) in Zusammenhang mit der geplanten Übernahme sämtlicher Altona-Aktien (Übernahmeangebot) durch Copper Mountain Mining Corporation (CMMC) genehmigt hat. Das Gericht hat außerdem entschieden, ... | Weiterlesen