Source of Informations

World class economic gold and base metals deposits: Eritrea 2020

World class gold and base metals deposits
World class economic gold and base metals deposits


Alpha Exploration Ltd is an Exploration Company, focused on the discovery of world class economic gold and base metals deposits in the highly prospective Arabian-Nubian shield that runs on either side of the Red Sea.


The Company was established to pursue opportunities in a region of high geological prospectivity but limited historic exploration. Alpha has assembled a ‘Team’ of experienced ‘Explorers’ with excellent record of discovery and mine development in the region.
It was decided the initial focus for property acquisition should be in Eritrea and then the wider Arabian-Nubian Shield, where modern exploration is at an early stage and opportunities for significant discoveries remain.
The Kerkasha Exploration License in Eritrea was granted in January 2018 and to date has been funded privately.



  • +1,000 recorded ancient copper and gold mines.
  • +6,000 Prospects and Occurrences.
  • Only a handful are currently in production or, under development for mining.
  • Multiple deposit styles already demonstrated.
  • (Orogenic, VMS, Epithermal, Intrusion hosted).


  • The Canadian and Australian ‘Shields’ host a number of world class ‘mining camps’ of varying mineral types (base metals, precious metals, diamonds, uranium, rare earth elements)
  • This implies the Arabian-Nubian Shield (ANS) is under explored and has many world class discoveries to be made


  • Eritrea is developing momentum compared to the other countries in the Arabian-Nubian Shield with a pipeline of new Mines in development
  • Special status for Miners and Explorers
  • Fourteen companies with Exploration Licenses
  • Eritrean ‘risk’ diminishing as Bisha and Zara in production and Asmara/Colluli Projects in development for mining
  • Agreeable Mining Act based on West Australian Act that encourages foreign investment in the mineral exploration industry.

The Kerkasha Exploration License Agreement granted on the 10 January 2018, covers an area of 973km² and is valid for 3 years. There is the ability to negotiate time extensions for the license after the initial 3 year period. The license area has the potential for gold & base metal mineralisation.

Exploration Targets:

– (Sukari Type) Bulk tonnage low grade gold deposit at margin of syn-tectonic intrusion.
– (Zara Type) High grade, deep vein orogenic gold deposit.
– (Augaro Type) Structurally controlled gold-copper deposit.
– (Bisha Type) Volcanogenic massive sulphide (VMS) copper-zinc deposit with significant gold credits.
– (Jebel Ohier type) Porphyry Copper-gold deposit

Improved supervised classification of bedrock in areas of transported overburden: Applying domain expertise at Kerkasha, Eritrea

The geology of Eritrea is characterised by the Arabian Nubian Shield Precambrian basement, which is unconformably overlain by Mesozoic to Cainozoic rocks. The country’s regional geology is divided into four distinct terranes: Nakfa, Adobha Abiy, Arag and Hagar. Each terrane is structurally bounded by approximately north-to-south trending shear zones. The late Neoproterozoic collision between East and West Gondwana concentrated transpression in the juvenile crust of the Arabian Nubian Shield in Eritrea along at least two steep, curvilinear crustal-scale belts, the Augaro-Adobha Belt (AAB) and the Asmara-Nakfa Belt. Between these belts is a relatively-lower metamorphic-grade domain, which hosts the Kerkasha case study area.

Fig. 1

The ~1000 km2 Kerkasha mineral exploration leases are situated ~200 km west of Asmara. Approximately 39% of the area has been mapped as alluvium or colluvium transported cover. The landscape is characterised by low-lying, monotonous plateaus (900–1400 m above sea level) and is bordered by steep slopes. The Kerkasha project is within the Nakfa terrane and comprises Neoproterozoic volcano-sedimentary units adjacent to mafic to felsic intrusions. Local geology has been interpreted as granitoid, granodiorite, and diorite intrusions emplaced into the pre-tectonic metasedimentary and mafic-to-felsic volcanic assemblages. The stratigraphy is overprinted by numerous deformation events, locally obscuring the primary fabric of rocks, especially in metasedimentary and metavolcanic rocks. However, the granitoids are comparably-less deformed than the volcanics.

Fig. 2