top of page

The Best Small-Cap Bauxite Companies on the ASX

Canyon Resources Limited (ASX: CAY) and Metro Mini

The Best Small-Cap Bauxite Companies on the ASX – Canyon Resources Limited (CAY) and Metro Mining Limited (ASX: MMI) is a continuation from my first bauxite article titled “Bauxite – The next commodity rush?“.  I hope the first article will shed some light into the following piece of writing.

Bauxite companies that swim in the small-cap sector are hard to find.  Bauxite is a commodity that seems to be reserved for bigger players around the world, what we call Tier 1 players.  Take the two bauxite province in Australia. The Darling Range is Alcoa and Worsley and the other in Weipa is all about Rio Tinto.

Personally, bauxite is one of the most straightforward commodity to evaluate.  It’s just a bulk commodity and controlled by size and chemistry.  As usual, many will argue that it is not that simple. If I want to be honest, I agree, but for this purpose of a desktop evaluation, I will say that it is simple.

Metro Mining Limited (ASX: MMI)

According to the Metro Mining Limite website, the company was established in 2014 and is a company focused on the Bauxite Hills deposit.  The project is located 95km north of Weipa on Western Cape York with a total tenement holding of 1.900 square kilometres.  The Bauxite Hills Mine has a total Resource of 144.8 million tonnes.

Mining began in April 2018 and produced approximately 2 million tonnes to China and was announced on 31 December 2018.

Metro Mining Limited Project Location. (Source:Metro Mining Limited)
Metro Mining Limited Project Location. (Source:Metro Mining Limited)

Mining ceased in December 2018 due to the wet season and will be commenced again in April 2019.  An update for the new activities issued on the 28 February 2019.

Capital Structure

Market Capitalisation:  187M (03/2019) Outstanding Shares:  1,362M (06/2018) Top 20 Shareholding:  76.50% (2018)

Metro Mining Limited (ASX: MMI) 5 Year Chart. (Source:Commsec)
Metro Mining Limited (ASX: MMI) 5 Year Chart. (Source:Commsec)

Flagship Project

Metro Mining’s flagship project, The Bauxite Hills Mine, is located 95kms north of Weipa on Western Cape York where the company holds a total tenement package covering approximately 1,900 square kilometres.

The Bauxite Hills Mine, alone, has an estimated ore Reserve of 92.2Mt and total Resources of 144.8Mt

Bauxite Hills Deposits. (Source: Metro Mining Limited)
Bauxite Hills Deposits. (Source: Metro Mining Limited)
The deposit type is lateritic bauxite derived from the weathering of aluminous sediments in a tropical to sub-tropical environment. The mineralisation within the Bauxite Hills Mine forms part of the Weipa Plateau, a widespread area of aluminous laterite on the west coast of Cape York Peninsula that includes Rio Tinto Alcan’s Weipa, Andoom and Amrun bauxite deposits as well as Metro Mining’s Bauxite Hills Mine. The bauxite deposits in the Project area generally consist of a single flat-lying pisolitic bauxite layer, generally 0.5m – 3m thick that is underlain by a kaolin horizon. Within the area of the resources the average bauxite thickness is 1.6m. The bauxite deposits are overlain by lateritic overburden and topsoil. Under the bauxite deposits there is often a ferruginous cemented layer and a kaolin clay layer. Kaolin, sandy clays and minor quartz sand deposits occur beneath the bauxite layer and extend beyond the bauxite areas. The geological model is grade-based using a cut-off of ≤15% total SiO2 and ≥45% Al2O3 for the BH1 resource area, a cut-off of ≤8% reactive SiO2 (at 1500C) and ≥45% Al2O3 for the BH2 area and a cut-off of ≤20% total SiO2 and ≥45% Al2O3 for the combined BH6 and Gulf (Skardon) resource area.

(Source:  Metro Mining Limited)

Mining operations commenced in April 2018. In its first year of operations, Metro achieved its 2018 production guidance shipping 2 million tonnes to five different Chinese companies.

Metro Mining Bauxite Hills Mine site (Source: Metro Mining)
Metro Mining Bauxite Hills Mine site (Source: Metro Mining)

The company has announced an expanded 2019 calendar year production from 3.0Mtpa to 3.5Mpa.

Metro has also commenced a DFS for potential Stage 2 Expansion of Annual Production to 6.0Mtpa by 2021.

Metro is also further exploring its tenement holdings on Cape York, initially focusing on near mine opportunities for Bauxite Hills.

The Bauxite Hills Mine employs up to 220 people with an indigenous workforce of approximately 37%. Around 90 people on site at any one time.

Simple Mining Operation:

• Mining operations are undertaken only in the dry season, which is notionally 8 months from April to November. • Free-dig bauxite is mined by front-end loaders, trucked to a port infrastructure area, screened to a max product size of 100mm and fed onto the Barge Loading Facility and into barges. • Barges are towed down the Skardon River to an anchorage point at sea where the bauxite is transhipped to freight vessels.

Canyon Resources (ASX: CAY)

Canyon Resources is developing the Minim Martap Project which is located in the Adamawa region of Cameroon which is alongside the company’s other project, Birsok Bauxite Project.

The Minim Martap Project includes two projects, the Ngouadal and Minim Martap deposits, which are within 25km of each other.  The total area of the permits is 1,349 square kilometre.

Capital Structure

Market Capitalisation:  90M Outstanding Shares: 315.4M  (06/2018) Top 20 Shareholding: 33.50% (2018)

Minim Martap Project

What I like about the project is the size.  The ones in Australia that are owned by small players do not have the size.  The grade is high but short of the 50% mark that is common in these tropical deposits.  These deposits are refractory and usually require high temperature to treat them. Chemically, bauxite deposits are complex and different deposits will have their issues.  The size present with Canyon is impressive, and I am sure they have an excellent chance to extend their resource.  What I am not sure about is the typical sovereign issues that seem to muddy all projects from Africa.

Canyon Resources project location, rail and port facilities. (Source: Canyon Resources)
Canyon Resources project location, rail and port facilities. (Source: Canyon Resources)

However, in defence of the potential sovereign risk issues,  I have a few associates tell me that those issues are not as bad as reported.  In some degree, I have to agree as there are indeed many projects that are doing well in places such as Africa and Asia where you would think that these sovereign issues will be a deal breaker.


There is a lack of small-cap bauxite players and the reason, I believe, is the bulk nature of deposits and the lack of a market price.  The lack of a spot market price can be hazardous for small players, especially when they don’t have a large deposit.  The other issue is that the value-adding occurs when you turn it into alumina and if you are not blessed with a significant resource and an excellent grade, you are going to have a problem.

The fact that bauxite is a product of chemical weathering and you are in a tropical climate,(rare to be in an arid environment),  you need a geological condition to retain and subsequently capture the end product.  If you do not have a “geological collection point”, you are not going to get a large deposit.

With limited competition, if these two companies get their cash flow happening, they are going to be very interesting. There is no argument that the Chinese market will improve and demand will surge.  I think these two companies will take time to get their act together and like many small-cap companies, the liquidity of their cash position will determine how long they hang around.

Canyon has decent looking chemistry with their resource.  Their silica content is very low as the industry is buying up to 8% silica.  I am not clear on the chemistry for Metro, but I would assume that Weipa will be reasonably consistent.  What I do know about the Weipa bauxite is the requirement of high-temperature refining. I am guessing the refractory nature causes the same problem as what you get in refractory gold issues.  The Weipa grade is good. However, I think they need to get the tonnages up.



The information or opinions provided herein do not constitute investment advice, an offer or solicitation to subscribe for, purchase or sell the investment product(s) mentioned herein. It does not take into consideration, nor have any regard to your specific investment objectives, financial situation, risk profile, tax position and particular, or unique needs and constraints. Read full Disclaimer.

If you find this article informative and useful, please help me share the information.  I try and write about topics that are interesting and have the potential to be of investment value.  It is not easy to find stories that fit those parameters.

If you or your organisation see the benefit of what Samso is trying to achieve and have a need to share your journey, please contact me on


bottom of page