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首页> 外文期刊>Bulletin of the National Research Centre >Contribution to the Petrogenesis and the Temporal Variation in Arc Magmatism Yielding the Dokhan Volcanic Rocks in the Eastern Desert of Egypt
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Contribution to the Petrogenesis and the Temporal Variation in Arc Magmatism Yielding the Dokhan Volcanic Rocks in the Eastern Desert of Egypt

机译：埃及东部沙漠多汉火山岩产生弧岩浆作用的岩石成因和时间变化的贡献

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摘要

The present paper deals with the overall geochemical characteristics of the Dokhan volcanics in ten selected localities in the Eastern Desert of Egypt and the maturity of the arc magmatism. Dokhan volcanics comprise mainly basalts, basaltic andesites , andesites, dacites and rhyolites, in addition to their pyroclastic equivalents. The Dokhan volcanics were derived from a calc-alkaline magma erupted along an active continental margin, the calc-alkaline nature of these rocks is the most pronounced feature of the parent basaltic magma. The resulted volcanic arcs are compared with some modern arcs, e.g. Tonga-South Sandwich, New Zealand and New Guinea. The Dokhan volcanics have active similarity of the mature arcs active continental margin of Chili., whereas the arc maturity increases towards Esh El-Mellaha range as well as, highly mature volcanic arc similar to that of New Guinea.
机译：本文探讨了埃及东部沙漠中十个选定地区的多汉火山的整体地球化学特征以及弧岩浆作用的成熟度。独汉火山除了火山碎屑等价物外，还主要包括玄武岩，玄武安山岩，安山岩，Dacites和流纹岩。 Dokhan火山岩是从沿活跃大陆边缘喷出的钙碱性岩浆产生的，这些岩石的钙碱性性质是母体玄武岩浆的最明显特征。将生成的火山弧与一些现代弧进行比较，例如汤加-南桑威奇，新西兰和新几内亚。道汉火山活动与成熟弧活跃的智利大陆边缘具有活跃的相似性，而弧成熟度则向Esh El-Mellaha范围以及与新几内亚相似的高度成熟的火山弧增加。

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