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首页> 外文期刊>Contributions to Mineralogy and Petrology >On the relationship between the Bushveld Complex and its felsic roof rocks, part 2: the immediate roof
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On the relationship between the Bushveld Complex and its felsic roof rocks, part 2: the immediate roof

机译：关于布什维尔德建筑群及其长石屋顶岩石之间的关系，第2部分：直接屋顶

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Emplacement of large volumes of mafic magma into the crust undoubtedly causes significant thermal perturbation to the overlying crust. Despite the clear importance of the country rock in modulating the thermal evolution the Bushveld Complex, little is known about the nature and extent of its roof zone. This manuscript details the lateral variability of the rocks that make up the immediate roof of the intrusion in the Eastern Limb. In the Northern Segment of the eastern Bushveld, the roof is dominated by thermally metamorphosed metapelites; in the Central Segment, the roof is dominated by highly metamorphosed meta-volcanic rocks and their partially molten equivalents; and in the Southern Segment, the roof is likely composed of modestly thermally metamorphosed felsic volcanic rocks. The variability of roof lithology is also reflected in the variability of floor rocks to the intrusion. A new model for the emplacement of the eastern Bushveld Complex is proposed in which the mafic magmas intrude at a deeper level in the north and become shallower to the south.
机译：大量铁镁质岩浆进入地壳无疑会对上覆地壳产生明显的热扰动。尽管乡村岩石在调节布什维尔德综合体的热演化方面具有明显的重要性，但对其屋顶区域的性质和范围知之甚少。该手稿详细介绍了构成东肢侵入岩顶的岩石的横向变化性。在东部Bushveld的北段，屋顶以热变质的变质岩为主导。在中段，屋顶以高度变质的超火山岩及其部分熔融的等价物为主;在南段，屋顶可能由适度热变质的长英质火山岩组成。顶板岩性的变化也反映在底板岩石对侵入岩的变化中。提出了一种新的东部布什维尔德建筑群进驻模型，其中铁镁质岩浆侵入了北部更深的地方，而向南变得更浅。

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