{
  "id": 4025855,
  "title": "Op-Ed: Ethiopia’s hidden SEDEX deposit — part of Africa’s next great basin?",
  "url": "https://urgent.news/2026/08/28/op-ed-ethiopias-hidden-sedex-deposit-part-of-africas-next-great-basin",
  "topic": "business",
  "section": "Business",
  "published": "2026-08-28T20:16:00.000Z",
  "source": {
    "name": "Mining.com",
    "slug": "mining-com",
    "url": "https://www.mining.com/op-ed-ethiopias-hidden-sedex-deposit-part-of-africas-next-great-basin/"
  },
  "original_language": "en",
  "account": "Sedimentary exhalative deposits, or SEDEX deposits, are akin to a well-executed recipe for bread, requiring key ingredients: metals, deep saline fluids, heat sources, and chemical traps. When these elements align, colossal mineral concentrations emerge. Ireland's Navan, Alaska's Red Dog, and Australia's McArthur River exemplify this principle. However, Ethiopia's mining landscape remains underexplored despite its potential. The Horn of Africa's mineral conversation has traditionally focused on gold and potash, with evaporites and narrow-vein, shear-hosted gold systems gaining prominence. Ethiopia's Afar Depression, home to these evaporites, showcases dense saline brines, a crucial component of SEDEX deposits. The Arabian-Nubian Shield and East African Rift System provide the essential deep crustal plumbing, driving metal-rich hydrothermal circulation. Ethiopia's basement rocks, a mixture of volcanic, intrusive, and metamorphic materials, offer ample structural pathways for brine circulation. The country's carbonates and calcareous mudstones serve as ideal reduction traps, where metal-rich brines concentrate and precipitate out as sulphides. Ethiopia's geologically active Afar Rift, a microcosm of ancient basin structures, presents a promising environment for such processes. The En Kafala iron-manganese-barium deposits, documented in the Afar Depression, demonstrate the feasibility of this scenario. Despite the compelling geological evidence, major miners have yet to capitalize on Ethiopia's potential. The mining industry tends to focus on established basins and predictable ventures, often overlooking the potential of older basin architectures.",
  "summary": "Sedimentary exhalative deposits boil down to an equally elegant recipe, writes Nicholas Vafeas.",
  "key_points": [
    "Ethiopia's Afar Depression has dense saline brines, crucial for SEDEX deposits.",
    "Arabian-Nubian Shield and East African Rift System provide deep crustal plumbing.",
    "En Kafala iron-manganese-barium deposits in Afar Depression demonstrate feasibility."
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}