Research Article
Geochemical and Quality Assessment of Lignite Deposits in the Getema Area, Arjo, Western Ethiopia: Implications for Energy Potential
Kokobe Alemayehu*
,
Mitiku Tamene
Issue:
Volume 14, Issue 4, August 2026
Pages:
70-77
Received:
25 March 2026
Accepted:
9 May 2026
Published:
11 July 2026
DOI:
10.11648/j.ogce.20261404.11
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Abstract: The exploration of domestic fossil fuel resources in Ethiopia is a strategic priority for balancing energy security and reducing reliance on climate-dependent hydropower. This study provides a comprehensive geochemical and quality assessment of 18 representative lignite samples from the Getema area, Western Ethiopia. Field observations across local stream exposures reveal thin, discontinuous seams (0.05 to 0.40 m) within a Mesozoic middle clay unit, often exhibiting visible sulfur staining. To satisfy international reporting standards, sampling locations were georeferenced using precise GPS coordinates. Laboratory analysis, conducted following ASTM D3172-13 and D5373 standards, indicates exceptionally low moisture levels (1.0% to 4.4%), which are attributed to localized thermal maturation from overlying Cenozoic Tertiary Trap Series basalts. Ultimate analysis reveals a robust organic matrix with carbon content reaching 45.6% and measured Gross Calorific Values (GCV) up to 4,850 kcal/kg. Based on these measured heating values and the consolidated physical state of the samples, the deposits are definitively classified as Lignite A. While high ash yields (30.3% to 89.5%) and sulfur levels (up to 4.2%) present industrial challenges, the inherent organic rank suggests a high energy potential that can be effectively unlocked through froth flotation beneficiation for use in the regional cement industry.
Abstract: The exploration of domestic fossil fuel resources in Ethiopia is a strategic priority for balancing energy security and reducing reliance on climate-dependent hydropower. This study provides a comprehensive geochemical and quality assessment of 18 representative lignite samples from the Getema area, Western Ethiopia. Field observations across local...
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