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Project Summary

Colluli is a 200-year project which will produce Sulphate of Potash (SOP), the premium fertiliser, at low capital and operating costs. Based in Eritrea, Colluli has the potential to make a significant social impact on Eritrea and the surrounding region.

Colluli is located in the Danakil Depression region of Eritrea and is approximately 230km by road south-east of the port of Massawa, which is Eritrea’s key import/export facility. The Danakil Depression contains significant volumes of potash bearing salts and commences in Eritrea and extends south across the border into Ethiopia.

Located approximately 75km from the Red Sea coast, Colluli has unrivalled logistics advantages. The project is the shallowest known evaporite mineralisation globally and consequently has significant mining, logistics and, in turn, capital and operating cost benefits over other potash projects.

The resource will be developed via open-cut mining: a proven, high productivity method which provides higher resource recoveries relative to other methods and is generally safer. The Project carries a significantly lower level of complexity due to predictable processing plant feed grades and production rates coupled with simple, commercially proven mineral processing technology.

The Colluli resource comprises the right combination of potassium bearing salts in solid form to deliver high yield, low energy production of Sulphate of Potash (SOP). SOP is suitable for application to fruits, vegetables, coffee plants and other chloride intolerant crops and is set to underpin the change in dietary behaviours as the world develops.

Due to the size of the resource Colluli has significant multi-commodity potential in addition to SOP including Sulphate of Potash-Magnesia (SOP-M) and MOP. Such potash product diversification cannot be achieved by any other known potash region in the world.

Project development commenced in late 2019 with the submission of the Notice of Mine Development to the Eritrean Ministry of Energy and Mines. A Mining Agreement was signed in 2017 and as such has the requisite Mining Licenses.

The JORC-2012 compliant mineral resource estimate for Colluli stands at 1.289Bt @ 11% K2O for 260Mt of contained SOP. The JORC-2012 compliant ore reserve estimate for Colluli stands at 1.100Bt @ 10.5% K2O for 203Mt of contained SOP. The Measured and Indicated Mineral Resources are inclusive of those Mineral Resources modified to produce the Ore Reserves.

A Social and Environmental Impact Assessment has been developed to ensure full compliance with the Equator Principals, International Finance Corporation Performance Standards, IFC Guidance, IFC Environmental, Social, Health and Safety Guidelines, Sector Specific Guidelines and National laws and regulations (collectively, the Lender Standards).

Due to the impact of Colluli on Eritrea, the United Nations Development Programme (UNDP) commissioned a report on the potential contributions of Colluli to Eritrea’s Sustainable Development Goals.


For more information on the resource and reserves: Link

For more information on the UNDP Report: Link

For more information on the Potash: Link


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  • DNK presenting at Africa Fertilizer Agribusiness Conference

    Monday, 14 September 2020

  • Colluli Project Update

    Thursday, 03 September 2020