African Copper Plc-Diamond Drill Results From the Dukwe Project.LONDON -- African Copper Plc (TSX TSX Toronto Stock Exchange (TSE before April, 2002) TSX Transfer from Stack Pointer to Index TSX True Space Extension :ACU ACU See: Asian currency units )(AIM:ACU)(BSE See Bombay Stock Exchange. BSE See Boston Stock Exchange (BSE). :African Copper) - 12,000 metres of current 20,000 metre resource delineation program completed - program to complete by early 2006 - First phase of twin hole drilling aimed at validating historical Falconbridge data on sulphide sulphide: see sulfide. resource - second phase designed to expand knowledge and provide updated resource figure - 4.64% copper over 11.13 metres within a broader interval of 1.86% copper over 29.12 metres. - Approximately 250 metres to the north, 1.90% copper over 33.48 metres at the hangingwall, and 1.61% copper over 10.19 metres at the footwall foot·wall n. Geology 1. The mass of rock underlying a mineral deposit in a mine. 2. The underlying block of a fault having an inclined fault plane. of the mineralized min·er·al·ize v. min·er·al·ized, min·er·al·iz·ing, min·er·al·iz·es v.tr. 1. To convert to a mineral substance; petrify. 2. To transform a metal into a mineral by oxidation. 3. zone. The 73.94 metre mineralized package within this hole returned an average of 1.25% copper. - A further 1.75 kilometres to the north showed 2.15% copper over 30.21 metres within a larger intersection of 1.06% copper over 66.77 metres. - Metallurgical met·al·lur·gy n. 1. The science that deals with procedures used in extracting metals from their ores, purifying and alloying metals, and creating useful objects from metals. 2. studies on both oxide and sulphide material underway with encouraging initial results - Company evaluating option of commencing with underground mining of sulphide and supergene su·per·gene n. A group of closely linked genes occupying a large chromosomal segment and frequently functioning as a genetic unit. material with concentrate production African Copper Plc ("African Copper" or the "Company") announces the first assay results from its diamond drilling Diamond Drilling is a highly specialized industry used for mineral exploration around the world. Most commonly using wireline and core bits with diamond encrusted matrix. To drill holes to max depths of twelve thousand feet, for the recovery of core used in verifying mineral programme which is underway on the Dukwe project in Botswana. The 20,000 metre resource delineation programme commenced in August of this year with over 12,000 metres of diamond core drilling Diamond core drill bits are used to bore large holes in brick, concrete and stone. They are not generally used in other materials. The bit consists of a metal cylinder, usually relatively soft steel mounted on an arbor. in 48 holes completed to date. It is expected that the drilling programme will be completed in late 2005 or early 2006. Results of the Twin Hole Drilling The results for the first four twinned drill holes are tabulated below. The drilling has confirmed the broad geology and styles of mineralization Mineralization The process by which the body uses minerals to build bone structure. Mentioned in: Rickets mineralization, n the bioprecipitation of an inorganic substance. encountered in the historic drill holes. The grade of mineralization is expected to be variable given the nature of the semi-massive to disseminated mineralization within the Dukwe Shear cataclastite. At the south end of the known mineralization, hole T1FB22 showed a higher-grade intercept of 4.64% copper over 11.13 metres within a broader interval of 1.86% copper over 29.12 metres. Approximately 250 metres to the north, hole T2FB24B intersected 1.90% copper over 33.48 metres at the hangingwall, and 1.61% copper over 10.19 metres at the footwall of the mineralized zone. The entire mineralized package within this hole returned 1.25% copper over 73.94 metres. Mineralization is known to extend a further 1.75 kilometres to the north, where hole T6FB40 returned similar intervals of 2.15% copper over 30.21 metres within a larger intersection of 1.06% copper over 66.77 metres. The deepest intersection is at about 275 metres below surface. The mineralization at Dukwe also contains anomalous levels of gold, silver, lead and zinc. The first phase of the current campaign concentrated on a twin hole programme designed to validate the historical database from which Falconbridge estimated a sulphide copper resource. This historical database was used to complete underground mine designs and economic models for a proposed mining operation at Dukwe between1983 and 1990. The second phase of the current drilling programme has been designed to provide an estimate of the sulphide resources that are known to exist beneath the open pit oxide reserves. The entire delineation programme, including this twin hole phase, is managed by RSG RSG Revenue Support Grant (UK) RSG Recovery Storage Group (Microsoft Exchange) RSG Ready, Set, Go! RSG Regional Support Group RSG Research Study Group (NATO) Global Pty Ltd PTY LTD Propriety Limited (company structure in Australia) . an internationally recognized independent geological consulting firm Noun 1. consulting firm - a firm of experts providing professional advice to an organization for a fee consulting company business firm, firm, house - the members of a business organization that owns or operates one or more establishments; "he worked for a . Six drill holes were selected from the 23 historic drill holes that intersected copper sulphides. These six holes do not represent the best intersections, but were selected to represent the full range of geology, mineralization and copper concentrations that could be expected beneath the two kilometre extent of the proposed open pit. Six twin holes were drilled with one of these having a deflection deflection /de·flec·tion/ (de-flek´shun) deviation or movement from a straight line or given course, such as from the baseline in electrocardiography. de·flec·tion n. 1. drilled to provide a second twin intersection. Three other intersections are awaiting assays, but African Copper is confident that the historic database will ultimately be used in conjunction with the current infill in·fill n. 1. The use of vacant land and property within a built-up area for further construction or development, especially as part of a neighborhood preservation or limited growth program. 2. drilling results to estimate the sulphide resource base at the Dukwe Project. Following the receipt of these pending assays, RSG Global will statistically and geologically compare the twin hole programme prior to accepting the full database. A table showing the composite assay intervals for the twinned holes is attached to this press release. A plan map showing the location of historical holes and these twin holes is available on the African Copper website at www.africancopper.com. Cross sections of the drill holes reported herein are also available on the website. Dukwe Sulphide The present reserves at Dukwe are comprised of oxide and supergene material and is defined as a Probable Reserve of 5.1 million tonnes grading 1.85% copper within an open pit outline. Beneath this pit outline, a further Inferred Resource of 13.0 million tonnes of sulphide material grading 3.85% copper (using 1.5% cut-off cut-off Anesthesiology The point at which elongation of the carbon chain of the 1-alkanol family of anesthetics results in a precipitous drop in the anesthetic potential of these agents–eg, at > 12 carbons in length, there is little anesthetic activity, and 2 metre minimum mining width) exists. These estimates of resources are contained in a technical report entitled en·ti·tle tr.v. en·ti·tled, en·ti·tling, en·ti·tles 1. To give a name or title to. 2. To furnish with a right or claim to something: "Technical Report on the Dukwe Copper Project and Matsitama Prospecting Licences Botswana, Africa" dated May 5, 2005 prepared by ACA ACA - Application Control Architecture Howe International Limited and is filed on SEDAR SEDAR System for Electronic Document Analysis and Retrieval SEDAR Southeast Data, Assessment, and Review (which is available on www.SEDAR.com or www.africancopper.com). The current 20,000 metre infill drilling programme is designed to increase the confidence of the estimate such that Measured and Indicated Resources can be defined prior to the completion of a feasibility study "A Feasibility Study" is an episode of the original The Outer Limits television show. It first aired on 13 April, 1964, during the first season. It was remade in 1997 as part of the revived The Outer Limits series with a minor title change. . Table 1: Composited Assay Intervals for Twinned holes and historic Falconbridge results
---------------------------------------------------------------------
African Copper Twin Results Falconbridge Results
---------------------------------------------------------------------
Selected From To Cu% Length From To Cu% Length
Package (m) (m) (m) (m)
---------------------------------------------------------------------
T1FB22 FB22
---------------------------------------------------------------------
A 222.10 240.10 0.71 18.00 246.50 271.00 2.54 24.50
---------------------------------------------------------------------
Including
A1 222.10 230.41 1.20 8.31 246.50 258.50 5.00 12.00
---------------------------------------------------------------------
---------------------------------------------------------------------
C 301.39 330.51 1.86 29.12 337.00 375.50 0.92 38.50
---------------------------------------------------------------------
Including
C1 301.39 312.52 4.64 11.13 337.00 342.00 4.02 5.00
---------------------------------------------------------------------
C2 Not Developed 354.00 358.00 1.18 4.00
---------------------------------------------------------------------
C3 Not Developed 366.00 368.00 1.05 2.00
---------------------------------------------------------------------
C4 Not Developed 371.00 373.00 1.57 2.00
---------------------------------------------------------------------
---------------------------------------------------------------------
T2FB24B FB24
---------------------------------------------------------------------
A 229.32 303.26 1.25 73.94 251.00 312.00 0.30 61.00
---------------------------------------------------------------------
Including
A1 229.32 262.80 1.90 33.48 251.00 268.00 0.73 17.00
---------------------------------------------------------------------
A2 262.80 265.48 3.63 2.68 273.00 275.00 0.69 2.00
---------------------------------------------------------------------
A3 293.07 303.26 1.61 10.19 307.00 310.00 0.80 3.00
---------------------------------------------------------------------
---------------------------------------------------------------------
T3FB36 FB36
---------------------------------------------------------------------
Assays pending
---------------------------------------------------------------------
---------------------------------------------------------------------
T3FB36D1 FB36
---------------------------------------------------------------------
A 200.92 204.71 2.93 3.79 204.50 210.50 1.23 6.00
---------------------------------------------------------------------
---------------------------------------------------------------------
B 209.00 255.00 0.59 46.00 220.00 259.00 0.58 39.00
---------------------------------------------------------------------
Including
B1 210.78 213.27 2.26 2.49 224.00 230.00 1.27 6.00
---------------------------------------------------------------------
B2 224.80 226.51 0.70 1.71 238.00 239.00 0.52 1.00
---------------------------------------------------------------------
B3 240.03 243.60 2.64 3.57 254.00 259.00 2.22 5.00
---------------------------------------------------------------------
B4 251.60 253.60 1.16 2.00 Not Sampled
---------------------------------------------------------------------
---------------------------------------------------------------------
T4FB29 FB29
---------------------------------------------------------------------
Assays pending
---------------------------------------------------------------------
---------------------------------------------------------------------
T5FB34D1 FB34
---------------------------------------------------------------------
Assays pending
---------------------------------------------------------------------
T6FB40 FB40
---------------------------------------------------------------------
A 182.40 249.17 1.06 66.77 176.50 243.00 1.50 66.50
---------------------------------------------------------------------
Including
A1 199.30 229.51 2.15 30.21 195.50 225.50 2.84 30.00
---------------------------------------------------------------------
Note: These intersections are not true widths since all holes are drilled to the northwest with collar inclinations of -58 degrees to -63 degrees into the mineralized zone that dips to the southeast at -80 degrees to -90 degrees. Samples of half core are cut and placed into sealed bags on the Dukwe site under the direct supervision of RSG Global Pty Ltd. These are transported weekly by commercial carrier to Johannesburg. All sample preparation and analyses are completed at ALS Als (äls), Ger. Alsen, island, 121 sq mi (313 sq km), Sønderjylland co., S Denmark, in the Lille Bælt, separated from the mainland by the narrow Alensund. Chemex laboratories in Johannesburg (ISO (1) See ISO speed. (2) (International Organization for Standardization, Geneva, Switzerland, www.iso.ch) An organization that sets international standards, founded in 1946. The U.S. member body is ANSI. 17025 accredited accredited recognition by an appropriate authority that the performance of a particular institution has satisfied a prestated set of criteria. accredited herds cattle herds which have achieved a low level of reactors to, e.g. and independent of Afirican Copper and RSG Global). Copper assays are completed using standard preparation of crushing to 70% less than 2 mm followed by splitting and pulverizing to 85% less than 75 micron. Analyses are generally completed utilizing 27 element four-acid ICP-AES ICP-AES Inductively Coupled Plasma Atomic Emission Spectroscopy ICP-AES Inductively Coupled Plasma Atomic Emission Spectrophotometry in addition to a four-acid ore-grade element digestion followed by ICP-AES. Any overlimit analyses are reanalyzed using an ore-grade four-acid digestion with AA or ICP-AES finish. QA/QC QA/QC Quality Assurance/Quality Control procedures included the submission by RSG Global of systematic duplicates, blanks and both low-grade and high-grade standard samples within the sample batches submitted to ALS Chemex. Control samples comprise 20% of all samples submitted. No referee analysis has yet occurred. The results of the RSG Global QA/QC programme for copper analyses have been reviewed by RSG Global Pty Ltd and Mr. Joseph Hamilton P.Geo., the "qualified person" as defined in Canada under NI 43-101. The Falconbridge intervals and assays have not been independently verified as no core from the 1980's drilling is available for resampling. As a result Falconbridge's historical drill logs and assay certificates were relied upon. Engineering and Metallurgical Studies African Copper has completed detailed engineering and costing studies on an open-pit heap-leach SX-EW production option for the Dukwe oxide reserves. The Company has deferred the construction decision pending the results of the current drill programme and completion of detailed engineering and costing studies on an underground mine - concentrator option. Metallurgical flotation flotation or froth flotation Most widely used process for extracting many minerals from their ores. The method separates and concentrates ores by altering their surfaces so that they are either repelled or attracted by water. studies on all types of mineralization are underway with a view to optimizing the concentrator flowsheet. Initial results from the flotation work are encouraging. African Copper is confident that a decision regarding production from the underground sulphides and open-pit oxides could be made in early 2006 once metallurgical, engineering, capital and operating costs operating costs npl → gastos mpl operacionales and resource/reserve characteristics are known. African Copper is a tri-listed (AIM, TSX, Botswana Stock Exchange The Botswana Stock Exchange is a small but thriving stock exchange located in Gaborone, Botswana. The Botswana share market was established in 1989 and became the Botswana Stock Exchange in 1995. It is governed by the Botswana Stock Exchange Act. ) international exploration and mining company. Six drills are currently on-site completing a sulphide delineation programme, and a Bankable bank·a·ble adj. 1. Acceptable to or at a bank: bankable funds. 2. Guaranteed to bring profit: a bankable movie star. Feasibility Study The analysis of a problem to determine if it can be solved effectively. The operational (will it work?), economical (costs and benefits) and technical (can it be built?) aspects are part of the study. Results of the study determine whether the solution should be implemented. on the open-pit portion of the deposit is on schedule for completion later this year. African Copper expects to commence construction of the Dukwe Project in early 2006. The Company's other interests are the 4,000 sq km Matsitama exploration concession adjacent to Dukwe, which contains two known copper deposits and numerous base metal exploration targets. African Copper has approximately 52 million shares outstanding. Mr. Joseph Hamilton, P.Geo, and Chief Operating Officer Chief Operating Officer (COO) The officer of a firm responsible for day-to-day management, usually the president or an executive vice-president. of African Copper is a "qualified person" as defined in Canada by NI43-101. This press release has been prepared under Mr. Hamilton's supervision. This document may contain or refer to forward looking information, including reserve and resource estimates, estimates of future production, exploration and mine development, unit costs, costs of capital projects and timing of commencement of operations and estimates of market conditions, and is based on current expectations that involve a number of business risks and uncertainties. Factors that could cause actual results to differ materially from any forward looking statement include, but are not limited to, failure to establish estimated resources and reserves, the grade and recovery of ore which is mined varying from estimates, capital and operating costs varying significantly from estimates, delays in obtaining or failures to obtain required governmental, environmental or other project approvals, inflation, changes in exchange rates, fluctuations in commodity prices, delays in the development of projects and other factors. Forward-looking statements forward-looking statement A projected financial statement based on management expectations. A forward-looking statement involves risks with regard to the accuracy of assumptions underlying the projections. are subject to significant risks and uncertainties, and other factors that could cause actual results to differ materially from expected results. Readers should not place undue reliance on forward-looking statements. These forward-looking statements are made as of the date hereof and we assume no responsibility to update them or revise them to reflect new events or circumstances. Further information about our properties, to download a copy of our Annual Report, any technical report, our AIM prospectus or to access our Press Release Archive please visit.www.sedar.com or our website at www.africancopper.com. The Toronto Stock Exchange Toronto Stock Exchange (TSE) Canada's largest stock exchange, trading approximately 1,200 company stocks and 33 options. does not accept responsibility for the adequacy or accuracy of this release. African Copper Plc (TSX:ACU) (AIM:ACU) |
|
||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion