Abstract
It is proposed that the Adola placer gold was derived, ultimately, from the ultrabasic rocks which are now represented by serpentinites and talc-schists. During the process of serpentinisation the ultrabasic rocks expelled abundant silica and available gold, which were deposited as gold-quartz veins in the overlying brittle basalts. Erosion of these basalts, now amphibolites has resulted in concentration of the gold as placers in the overlying conglomerates and soils.
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Clark, A.M.S. Serpentinites as a possible source of the Adola placer gold, Sidamo, Ethiopia. Mineral. Deposita 14, 119–122 (1979). https://doi.org/10.1007/BF00201871
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DOI: https://doi.org/10.1007/BF00201871