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ARCHER MATERIALS LIMITED — Capital/Financing Update 2015
Jul 2, 2015
64478_rns_2015-07-02_b8af570b-af95-4a37-b4b5-0e979b798c10.pdf
Capital/Financing Update
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ASX Release 3 July 2015
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ASX Code: AXE
Highlights
Directors
Greg English Chairman
Gerard Anderson Managing Director
Tom Phillips AM Director (Non-Executive)
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Underground face sampling on the uppermost level of the historic Spring Creek Copper Mine confirmed significant copper mineralisation peripheral to the former production stopes.
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Sampling identified a ≈2% Cu halo consisting of copper carbonate (malachite and azurite) outside of the main stopes including:
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2m @ 1.8% Cu across drive 1
Alice McCleary Director (Non-Executive)
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4m @ 3.0% Cu across drive 1a
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10m @ 1.3% Cu along drive 2, and
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o12m @ 1.9% Cu along drive 3a
Company Secretary
Damien Connor
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Point sampling of pillars within one stope indicated grades over 8% Cu – mirroring the reported grades from the mine.
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Copper mining ceased in 1918 when the shallow underground mine flooded.
Shares on Issue
84.5 million
Unlisted Options on Issue 2.3 million Performance Rights
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Presence of copper outside of main stopes highlights potential for new copper lodes to be intersected below the sampled drives.
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Archer plans to drill test the copper mineralisation in FY 2016
Key focus
Eyre Peninsula Graphite Project (includes Campoona, Sugarloaf and Waddikee) Additional portfolio opportunities: magnesite, manganese, copper and gold
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Archer Exploration Limited ABN 64 123 993 233 Level 1, 28 Greenhill Road Wayville SA 5034
Archer Exploration Limited (Archer or the Company) is pleased to announce that its initial sampling of the old Spring Creek Copper Mine, located 30km of Wilmington, South Australia, has identified significant copper outside of the previously mined areas. The results of the sampling have confirmed:
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the style of mineralisation is not strictly limited to the stratigraphy; and
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the presence of copper outside of main stopes highlights potential for new copper lodes to be intersected below the sampled drives
Commenting on the results, Managing Director, Gerard Anderson said, “ Having recently lodged the Mining Lease Proposal for our Campoona Shaft graphite project we now have some time to devote to assessing our other portfolio opportunities.”
Telephone +61 8 8272 3288 Facsimile +61 8 8272 3888 www.archerexploration.com.au
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Significant copper from Spring Creek underground sampling
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“Our findings of copper peripheral to the old stopes at Spring Creek, together with the likelihood of being able to define extensions to the high grade historic stopes, is a very exciting prospect for Archer. This rediscovered project had historically been mined without the aid of modern mining methods or technology and was mined at an elevated cut-off grade to deliver ore grading 8-10% Cu. There is a lot of potential for us to find value in this asset” said Mr Anderson.
The Company has started the process of gaining the consents required to commence an underground diamond drill program at Spring Creek.
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Figure 1. Plan view of underground workings, face and point sampling copper assays.
Spring Creek
The historic Spring Creek copper mine is located 30km south of the township of Wilmington, South Australia.
Copper mining ceased in 1918 when the mine de-watering pump failed and the mine flooded. The government of the day determined that the operator had 12 months to reactivate the mine or face forfeiture. Pumps failed again and the mine was relinquished.
The historic mining records at Spring Creek document what can be described as a classic supergene copper profile with the uppermost portion comprised solely of copper carbonates malachite
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Significant copper from Spring Creek underground sampling
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(CuCO3•Cu(OH)2) and azurite (2CuCO3·Cu(OH)2) which pass vertically into copper oxides cuprite (Cu2O) and native copper (Cu) before passing vertically into transition sulphide zone consisting of chalcocite (Cu2S), and covellite (CuS).
Primary sulphides were never encountered meaning that the primary mineralisation which was the source of the copper that was mined is likely to occur at depth below the flooded workings. Archer expects that because of this that “unmined” intact and high grade copper mineralisation is likely to be found below the stopes.
The mine comprises a series of drives coming off an adit cut into a hill face, figure 1. Only the upper level was accessed. From these different drives a number of stopes are observed that were historically;
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accessed by winzes to lower levels
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mined down to the main drive from the surface
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Plate 1. Looking from the end of Drive 1 into the main drive intersection
The main copper lodes at the historic Spring Creek Copper Mine are contained within an intense eastwest striking quartz-rich hematite breccia within a ferruginous siltstone. Lower grade copper occurs as blebs and joint/fracture coatings within a “halo” around the mined stopes.
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Significant copper from Spring Creek underground sampling
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The style of mineralisation is NOT strictly limited to the stratigraphy as mineralised lenses are cross cutting and plunge within the breccia itself.
Sampling
The sampling program was undertaken to assess the presence and grade of copper mineralisation peripheral to the historic high grade (8-10% Cu) mining stopes within the Spring Creek mine. Samples were collected by face sampling access drives and by taking point sampling of remnant pillars.
Three separate drives were sampled (highlighted in figure 1) and assayed for copper. The results demonstrate that the multiple high grade copper bodies (8-10%Cu) have a halo of mineralisation averaging 1-3% Cu. Point sampling of remnant pillars within one stope accessible on the one level sampled indicate grades up to 8% Cu which mirrors historic mined grades.
All samples taken in the sampling programme were from the zones peripheral to the mined out stopes and all mineralisation consisted of the copper carbonates, malachite and azurite.
Sampling of Drive 1 (Face_001) commenced in hard silica rich rock and ended (Face_001a) in a pillar opposite Stope_1 that was mined above the drive. Sampling of Drive 2 (Face _002) commenced after passing Stope_1 and continued back into the mine (Easterly) and ceased at the junction of an abandoned and sealed Drive. Sampling of Drive 3 (Face_003) was completed in two parts (003 and 003a) and continued from Stope 1 (in a Northerly direction) then around to the NE towards Drive _4.
Point samples were taken over 2 separate visits as a part of understanding the host rock and the mineralisation.
Drive 4 was not sampled as it strikes in a direction similar to that of the stratigraphy (020); Drive 5 was inaccessible at the time due to an open winze.
The lower stopes were not sampled in this round. However, Mining Reports from the SA Govt (1916), describe grades ranging from 2.2 to 8.9% Cu remain in faces in these lower stopes.
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Significant copper from Spring Creek underground sampling
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Results
Table 1 below, presents the copper assays for the Face sample of the drives. All drives were sampled from East to West.
| Hole ID From To Cu% |
Hole ID From To Cu% |
|---|---|
| FACE_001 0 2 0.29 |
FACE_002 0 2 1.17 |
| FACE_001 2 4 0.17 |
FACE_002 2 4 2.04 |
| FACE_001 4 6 0.17 |
FACE_002 4 6 1.54 |
| FACE_001 6 8 0.20 |
FACE_002 6 8 0.26 |
| FACE_001 8 10 0.22 |
FACE_002 8 10 1.46 |
| FACE_001 10 12 1.78 |
FACE_002 10 12 0.61 |
| FACE_001a 0 1 3.96 |
FACE_002 12 14 0.27 |
| FACE_001a 1 2 2.16 |
FACE_002 14 16 0.18 |
| FACE_001a 2 3 2.88 |
FACE_002 16 18 0.27 |
| FACE_001a 3 4 3.17 |
FACE_002 18 18.3 1.36 |
| FACE_003 0 2 0.38 |
FACE_002 18.3 20.3 0.23 |
| FACE_003 2 4 0.15 |
FACE_002 20.3 22.3 0.27 |
| FACE_003 4 6 0.30 |
FACE_002 22.3 23.3 0.35 |
| FACE_003a 0 2 0.35 |
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| FACE_003a 2 4 2.16 |
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| FACE_003a 4 6 1.50 |
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| FACE_003a 6 8 0.99 |
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| FACE_003a 8 10 1.18 |
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| FACE_003a 10 12 3.60 |
Table 1. Copper assays from Face Sampling in mine
Point samples taken from inside the mine are presented in Table 2 below.
| Sample Id From To Cu% |
Sample Id From To Cu% |
|---|---|
| WD03046 0 0.1 0.11 |
13809 0 0.1 2.84 |
| WD03047 0 0.1 1.94 |
13810 0 0.1 0.37 |
| WD03048 0 0.1 3.24 |
13811 0 0.1 1.62 |
| WD03049 0 0.1 1.22 |
13812 0 0.1 8.62 |
| WD03050 0 0.1 0.65 |
13813 0 0.1 3.38 |
| WD03051 0 0.1 0.37 |
13814 0 0.1 0.37 |
| WD03086 0 0.1 3.02 |
WD03089 0 0.1 0.49 |
| WD03087 0 0.1 2.98 |
WD03090 0 0.1 1.47 |
| WD03088 0 0.1 1.87 |
Table 2. Copper assays from point samples taken in mine.
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Significant copper from Spring Creek underground sampling
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Future Exploration
Archer will source a small underground diamond drill rig and drill a series of fan holes designed to intersect extensions to all of the mined out the stopes below the mined out areas. Drilling from underground will determine the width and grade of the en echelon mineralisation within the cross cutting breccia.
Future drill holes will be orientated in directions to test for unmined pods primarily below the drive out to the North and South breccia contacts. The area of the breccia is some 100m by 70m (strike). A number of deeper drill holes will also seek to identify primary copper sulphides below the supergene envelope.
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Figure 2. Mineralisation extent of underground workings
For further information please contact:
Mr Greg English Mr Gerard Anderson Chairman Managing Director Archer Exploration Limited Archer Exploration Limited Tel: (08) 8205 3343 Tel: (08) 8272 328
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Significant copper from Spring Creek underground sampling
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A series of plates are presented below to show examples of the material sampled and reported.
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Plate 2. End of Drive 1, Face_001a sample intervals
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Plate 3. Example of material reporting 2.16%Cu
Plate 4. Example of material reporting 2.88% Cu
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Significant copper from Spring Creek underground sampling
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Plate 6. Western sample from Drive 3 with 3.6% Cu
Plate 5. Drive 3 Sampling, looking East
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Plate 7. Spot sample taken from backs in drive 3, 8.62% Cu
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Significant copper from Spring Creek underground sampling
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Plate 8. Example of Copper carbonate mineralisation (malachite) above portal entrance.
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About Archer
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Archer Exploration Limited is an Australian Stock Exchange listed company with 100% ownership of 15 tenements all in South Australia covering 5,165 km[2] .
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Archer Exploration Limited ABN 64 123 993 233 Level 1, 28 Greenhill Road Wayville SA 5034
The exploration results and exploration targets reported herein, insofar as they relate to mineralisation, are based on information compiled by Mr. Wade Bollenhagen, Exploration Manager of Archer Exploration Limited. Mr. Bollenhagen is a Member of the Australasian Institute of Mining and Metallurgy who has more than twenty years experience in the field of activity being reported. Mr Bollenhagen has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity that he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” relating to the reporting of Exploration Results. Mr. Bollenhagen consents to the inclusion in the report of matters based on his information in the form and context in which it appears.
Telephone +61 8 8272 3288 Facsimile +61 8 8272 3888 www.archerexploration.com.au
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