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首页> 外文期刊>Journal of African earth sciences >An initial survey of the composition of Ethiopian obsidian
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An initial survey of the composition of Ethiopian obsidian

机译:埃塞俄比亚黑曜石组成的初步调查

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摘要

Ethiopia is rich in obsidian and prehistoric peoples were utilizing it to make artifacts since at least the Early Stone Age. The unique chemical compositions of obsidian are of considerable interest to archaeologists when obsidian artifacts are recovered at prehistoric sites, both in terms of determining provenance and cultural exchange. Here we present electron microprobe analyses to characterize the major and minor element compositions of a suite of obsidian samples from 45 volcanic source locations along a 700 km extent of the Main Ethiopian Rift and the Afar Triangle. Of the 62 analyzed obsidian, 50 are classified as rhyolite, with subordinate numbers of trachyte and dacite. The Main Ethiopian Rift and its extension into the Afar region to the north have produced obsidian with different chemical affinities which may prove useful in narrowing down possible source regions for artifacts for which sources have not yet been discovered and/or analyzed.
机译:埃塞俄比亚丰富的黑曜石,史前人民正在利用它来制造文物,因为至少是早期的石器时代。当在史前地点在确定出处和文化交流方面,当史前地点回收黑曜石伪影时,对考古学家的独特化学成分对考古学家具有相当大的感兴趣。在这里,我们呈现电子微探测器分析,以表征来自45个火山源位置的主要和次要元素组成,沿着700公里的主要埃塞俄比亚裂谷和远程三角形。在62个分析的黑曜石中,50分为血管岩,具有从属数量的棘轮和粘性。主要的埃塞俄比亚裂谷及其进入北方远方地区的延伸已经产生了不同的化学亲和力,这可能证明在缩小可能尚未发现和/或分析源的伪影的可能源区。

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