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首页> 外文期刊>Geochemistry: Interdisciplinary Journal for Chemical Problems of the Geosciences and Geoecology >Geochemistry and U-Pb zircon dating constraints of some plutonic rocks along Bir Tawilah shear zone, central Saudi Arabia: Implication for magma peterogenesis and age of gold mineralization
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Geochemistry and U-Pb zircon dating constraints of some plutonic rocks along Bir Tawilah shear zone, central Saudi Arabia: Implication for magma peterogenesis and age of gold mineralization

机译：沙特阿拉伯中部Bir Tawilah剪切带某些深部岩石的地球化学和U-Pb锆石测年约束：对岩浆成矿作用和金矿化年龄的影响

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摘要

The study area covered by this work is located along the Bir Tawilah fault zone which encompasses the Arabian Shield between Afif terrane and western oceanic terranes. The rocks are dominantly ophiolite assemblages, island arc metavolcanic and metasedimentary rocks, and dioritic to granitic intrusions. The diorite and granodiorite rocks are I-type granitoids, calk-alkaline, metaluminous to peraluminous, formed in a volcanic arc setting, whereas the monzogranite is classified as A-type granite, alkaline and highly fractionated calc-alkaline, generated in within-plate tectonic setting. Nb and Y relationships indicated that the diorites and granodiorites were generated by a mafic parental magma contaminated with crustal materials, and controlled by fractional crystallization, whereas the monzogranites were generated from a magma characterized by an enriched mantle (EM) source.
机译：这项工作所覆盖的研究区域位于比尔塔维拉断裂带上，该断裂带涵盖了阿菲夫（Afif）地带和西部大洋地带之间的阿拉伯盾。这些岩石主要是蛇绿岩组合，岛弧变火山岩和准沉积岩，以及闪长岩到花岗岩侵入体。闪长岩和花岗闪长岩为I型花岗石，呈cal色碱性，呈金属质至高铝质，形成于火山弧环境中，而辉长花岗岩被分类为A型花岗岩，碱性和高分馏钙碱性，在板内生成构造环境。 Nb和Y的关系表明，闪长岩和花岗闪长岩是由镁铁质的母岩浆所形成，这些母岩被地壳物质污染，并受到分步结晶的控制，而辉长岩是由特征在于富集地幔（EM）的岩浆产生的。

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