Abstract Based on investigation of Proterozoic mafic dike swarms of the Siberian Craton, we inferred how the geochemical and isotopic characteristics of dike swarms of dolerites of Large Igneous Provinces depend on their distance from the mantle plume head. It has been found that the dolerite parent melts near the mantle plume head correspond to OIB compositions. At significant distances from the plume, the initial melts of dolerites are generated in the subcontinental lithospheric mantle, which provides a wide range of their compositions differing from typical OIB and do not indicate directly the genetic relationship of these mafic rocks with the mantle plume.

中文翻译：

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作为岩脉群与地幔柱中心距离指标的辉绿岩地球化学组成（西伯利亚克拉通元古代岩脉群的案例研究）

摘要 基于对西伯利亚克拉通元古界基性岩脉群的调查，我们推断了火成岩大省辉长岩脉脉群的地球化学和同位素特征如何取决于它们与地幔柱头的距离。已经发现辉绿岩母体在地幔柱头附近熔化，对应于 OIB 成分。在离羽流很远的地方，次大陆岩石圈地幔中产生了辉绿岩的初始熔体，这提供了不同于典型 OIB 的广泛成分，并且没有直接表明这些基性岩与地幔羽流的成因关系。