Pluton Resources Limited - Received Fine Drop Test Results And Assays For Isthmus Region Lump
22.12.2010 | ABN Newswire
10:34 AEST Dec 22, 2010 ABN Newswire (C) 2004-2010 Asia Business News PL. All Rights Reserved.Melbourne, Australia (ABN Newswire) - Pluton Resources Limited (ASX: PLV) ('Pluton') is pleased to announce that the drop tower test work results and assays from recently completed diamond drill hole 10DDH028 located at the Isthmus Region have been received. In addition, test results from the characterisation work completed on Yampi Member composites from the Hardstaff Peninsula have also been received.
HIGHLIGHTS
Isthmus Region
- Drop tower tests have shown that the high grade mineralised sandstones produce a minimum lump : fine product split of 70:30.
- Impurities apart from silica remain universally low.
Hardstaff Peninsula
- Assaying of the Davis Tube concentrates from the characterisation test work return greater than 70% Fe and less than 2.5% silica.
- The Yampi Member magnetite liberates from the gangue at a coarse grind size of 75 microns.
Metallurgical Testwork
Isthmus Region
Drill hole 10DDH028 (PQ diameter, end of hole 40.80m) was drilled at the Isthmus Region as a metallurgical hole to provide material to Amdel Mineral Laboratories in Perth, Western Australia to investigate the lump : fine potential of the high grade iron material.
Three composite samples were collected down hole, two representing the higher grade mineralised sandstones (Comp_1 and Comp_2) and a third sample (Comp_3) representing the mineralised quartz conglomerate.
Drop tower test results have shown that the high grade mineralised sandstones (Comp_1 and Comp_2) will produce a minimum 70% lump and 30% fines product. The lump material is defined as 70% of the material being coarser than 6.3mm diameter and the fines material being defined as 30% of the material being finer than 6.3mm.
Assaying of the lump material from the mineralised sandstones (Comp_1 and Comp_2) have returned iron grades up to 60% Fe with impurity levels for all elements apart from silica remaining universally low. Assaying of the fines material returned iron grades in the vicinity of 58% Fe and similar levels of impurities.
Drop tower test results have initially shown that the iron mineralised quartz conglomerates (Comp_3) did not produce a satisfactory lump product. However, test results for the corresponding fines fraction were encouraging and have returned iron grades in the vicinity of 56% Fe.
Additional test work on the three composite samples is now being investigated to further reduce the silica content.
Hardstaff Peninsula
Composited ore sample material selected from the Yampi Member in drill holes ID-6A, ID-6B, ID-29 and ID-33 completed at the southern area of the Hardstaff Peninsula have been submitted to Ammtec Limited in Perth, Western Australia. The aim of the test work was to determine the sample preparation and optimum grind characteristics for Davis Tube analysis that will be undertaken on all previously assayed drill core samples at the Hardstaff Peninsula.
Test results from the characterisation work completed on three composite samples from the Yampi Member at the Hardstaff Peninsula have now been received. Results show that the percentage iron content increases and is accompanied by a reduction in silica as the grind size decreases. The Yampi Member magnetite liberates from the gangue at a coarse grind size of 75 microns. The Davis Tube concentrate assays have been shown to contain greater than 70% Fe and less than 2.5% silica.
The assay results from the three composites are given in the following table:
-------------------------------------------
Wt. Rec %Fe %SiO2
-------------------------------------------
Composite 1 45.0 70.2 2.5
-------------------------------------------
Composite 2 57.6 70.8 1.7
-------------------------------------------
Composite 3 59.4 71.0 1.5
-------------------------------------------
Drill hole 10DDH039 (PQ diameter, end of hole 132.40m) was drilled at the south of the Hardstaff Peninsula as a metallurgical hole in late October 2010 to provide material for Ammtec Limited in Perth, Western Australia to undertake additional metallurgical test work.
Tests to be conducted on the core include unconfined compressive strength (UCS), crushing work index (CWI), bond work index (BWI), semi-autogenous grind (SAG) mill competency and other tests as deemed appropriate for process design purposes.
The drill site was selected due to the higher grade, near surface development of the Yampi Member and Wonganin Sandstone in the south of the Hardstaff Peninsula.
Comments
Managing Director Tony Schoer said: 'It is particularly encouraging to receive the results from the lump:fine test work from the Isthmus which confirms our belief that we could produce a marketable product with the only impurity of any significance being silica. It is also important to note that a lump product would normally command a higher price on market than a fines product. We continue to be pleased with the results of our intersections to date from the area and we look forward to releasing our maiden resource for the Isthmus.
In addition, the high iron and low silica values returned from the assays of the Yampi Member Davis Tube concentrates indicate that we may be able to produce a concentrate of exceptionally high quality that would command an additional premium on market.'
For the complete Pluton Resources announcement including results table, please refer to the following link:
http://www.abnnewswire.net/media/en/docs/64872-ASX-PLV-347921.pdf
About Pluton Resources Limited:
Pluton Resources Limited (ASX:PLV) is a mineral exploration company focusing on iron ore in the Kimberley region of Western Australia, with additional copper, gold and silver projects located in North Western Tasmania. The company was listed in 2006 and is based in Melbourne, Australia. Pluton Resources has proven to innovate and develop new technologies that would otherwise restrict other companies.
Contact:
Pluton Resources Limited
Mr. Tony Schoer, Managing Director
Mob: +61-411-232-711
Email: tschoer@plutonresources.com
http://www.plutonresources.com