Binjour Bauxite Resource Upgrade - 24.5 Mt
Sydney, June 29, 2012 AEST (ABN Newswire) - Emerging bauxite exploration and development company, Australian Bauxite Limited (
ASX:ABZ) has bauxite tenements totalling more than 8,700 km2 covering the core of the Eastern Australian Bauxite Province (see Figure 4 in link). ABx considers its Binjour Project located 100kms from Bundaberg Port to be a state significant discovery of a major bauxite province which may well become the company's flagship project over the next 5 years.
A 3 to 15 metres thick layer of bauxite extends over the entire 44 square kilometre Binjour Plateau (see Figure 2 in link). Parts of this bauxite layer contain silica gel veinlets which in its current form, makes the bauxite grades too silica-rich. However, this material has been shown to be easily removed by washing and the recovered bauxite then meets DSO grade. The large potential of Binjour is just being revealed, however, this resource estimate only includes bauxite that meets DSO grade (see Table 1 in link).
The district's deposits contain thick zones of premium grade gibbsite-rich bauxite often referred to as "Brown Sugar" bauxite, with good potential for more discoveries. ABx has recently applied for several exploration permits covering the extensions of Binjour Plateau geology.
"Brown Sugar" bauxite is ideal feedstock for sweetener circuits in alumina refineries and will demand a premium price.
Resource Estimation and Deposit Geometry
The Binjour bauxite unit is a distinct and predictable horizontal layer averaging approximately 6 metres in thickness, lying beneath a red mud unit averaging 8 metres in thickness that is free diggable and similar in density to the bauxite layer. The bauxite is high in Al2O3 but varies in SiO2 grade, mainly due to the presence of soft silica r bauxite layer is currently 44 square kilometres which is 15 times larger than the 3.0 square kilometres of DSO bauxite resources estimated herein to contain 24.5 million tonnes.
Metallurgical Results Encouraging: Silica Gel Removal to Expand DSO Bauxite Resources
In the last 6 months, preliminary metallurgical tests have been conducted by a clay processing engineer who found that the silica gel substance was easily removed by a simple, low-cost washing procedure that may become a proprietary technology. The gel is soft and only loosely adhered to the bauxite, which allows for easy liberation when washed, leaving a recovered bauxite that is low-silica, high alumina DSO Grade Bauxite.
Work is continuing to develop a standard sample preparation protocol for future analysis of the silica gel-bearing bauxite samples by commercial laboratories so that large tracts of the bauxite layer can be included in future resource estimations.
For the full release including tables, charts and diagrams, visit:
http://media.abnnewswire.net/media/en/docs/ASX-ABZ-684300.pdf
About ABx Group Limited
ABx Group Limited (ABx) (ASX:ABX) started as a bauxite miner in Tasmania in 2014 & controls the Eastern Australian Bauxite Province. In 2020 to 2023, ABx also discovered Australia’s only true ionic adsorption clay Rare Earth Elements resource at Deep Leads in pine plantations 40km west of Launceston with a JORC-compliant resource of 89 million tonnes from only 29% of the mineralised outline, averaging 844 ppm total rare earth oxides that is the most enriched in the critically important rare earths, Dy and Tb, of any Australian REE deposit.
ABx has also developed a proprietary technology to produce fluorine chemicals from an aluminium smelter waste product and return the fluorine back into the smelters, thus reducing reliance on imported aluminium fluoride.
ABx has committed a large proportion of its expenditure into Research and Development and has found ways to capitalise on the main strengths of its bauxite type which is very clean, free of all deleterious elements and can be separated into different product streams using physical, chemical and geophysical methods. It has produced and marketed specialist bauxite products for the manufacturers of fertiliser, cement with high late strength for major infrastructure such as bridges and is in the advanced stages of approvals for production of metallurgical bauxite from its Binjour Bauxite deposit with JORC-compliant resources of 37 million tonnes of bauxite, in a joint development with a Chinese-focussed Australian trading company Good Importing International.
ABx is also preparing to produce fertiliser grade and cement grade bauxite from its DL130 bauxite quarry in northern Tasmania, 40km west of Launceston. This quarry is sited in the middle of the large Deep Leads REE deposit and may one day be a site for heap leaching of the REE using a low-cost, benign leachate with the same acidity as apple juice or tea.
ABx endorses best practices on agricultural land, strives to leave land and environment better than we find it. We only operate where welcomed.
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