X-ray fluorescence analyses of sixty-one K-bentonite samples from the Ludlow-Pridoli sections of western Ukraine and Moldova were used for correlation and source magma interpretation. The study reveals that source magmas of K-bentonites were low-temperature (~720^oC) rhyolites indicating melting of continental crust during subduction of a hydrated oceanic plate. Volcanic sources were probably located within the developing Scythian Platform embracing the southeastern margin of the East European Platform. The present study demonstrates the potential of using immobile elements for correlating volcanic ash layers between different sections

中文翻译：

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东欧平台西南缘沉积带中记录的志留纪火山活动：地球化学相关性和构造岩浆解释

乌克兰西部和摩尔多瓦的Ludlow-Pridoli剖面的61个K-膨润土样品的X射线荧光分析用于相关性和源岩浆解释。研究表明，钾膨润土的岩浆是低温（〜720 ^o C）流纹岩，表明在水合大洋板块俯冲过程中大陆壳融化。火山源可能位于正在发展中的Scythian平台内，环绕着东欧平台的东南边缘。本研究表明使用固定元素关联不同断面之间火山灰层的潜力