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首页> 外文OA文献 >Discordant bodies of postcumulis, ultramafic rock in the upper critical zone of the Bushveld complex : iron-rich ultramafic pegmatite bodies at Amandelbult and the Driekop platiniferous ultramafic pipe
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Discordant bodies of postcumulis, ultramafic rock in the upper critical zone of the Bushveld complex : iron-rich ultramafic pegmatite bodies at Amandelbult and the Driekop platiniferous ultramafic pipe

机译：布什维尔德复合体上临界区中的后岩体，超镁铁岩的不协调体：amandelbult和Driekop铂质超镁铁质管道中富含铁的超镁铁质伟晶岩体

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摘要

From the abstract: In the layered sequence of the Bushveld Complex a number of distinct, but possibly genetically related groups of transgressive, postcumulus, ultramafic and mafic rock are recognised. The main part of this thesis investigates a suite of postcumulus rocks for which the name iron-rich ultramafic pegmatite is proposed. The majority of iron-rich ultramafic pegmatite bodies examined are from the upper critical zone of the layered sequence at Rustenburg Platinum Mines Amandelbult Section, in the northern sector of the western Bushveld Complex. Field relationships imply that the iron-rich ultramafic egmatites should be considered as an integral feature of the layered sequence, even though they transgress the cumulates. Consequently, this thesis also includes a study of the cumulate sequence at Amandelbult. A second group of postcumulus, ultramafic rocks which is investigated comprises latiniferous ultramafic pipes; the Driekop pipe has been selected as a case­ study. This thesis is presented in four sections, namely, an introduction and verview, and studies on the Driekop pipe, the cumulate sequence at mandelbult and the iron-rich ultramafic pegmatite suite. A new classification scheme of discordant bodies of postcumulus, ultramafic rock in he Bushveld Complex is proposed (see also Viljoen & Scoon, in press). In he scheme presented here, two main varieties of postcumulus, ultramafic rock re recognised, namely, non-platiniferous magnesian dunites and iron-rich ltramafic pegmatites.
机译：从摘要：在Bushveld复杂的分层序列中，可以识别出许多不同的，但可能与遗传有关的海侵，后积云，超镁铁质和镁铁质岩石。本文的主要部分是研究一套积云后的岩石，并提出了富铁超镁铁伟晶岩的名称。所检查的大多数富铁超镁铁伟晶岩体均来自Bushveld Complex西北部Rustenburg铂金矿场Amandelbult剖面的层序上临界区。场关系暗示，富铁的超镁铁质辉石岩应被视为分层序列的一个整体特征，即使它们跨越了堆积物。因此，本论文还包括对阿曼德尔布尔特累积序列的研究。被研究的第二类积云后的超镁铁质岩石包括含胶质的超镁铁质管。 Driekop管道已被选为案例研究。本论文分为四个部分，即导论和综述，并研究了Driekop烟斗，曼德尔球体的累积序列和富铁超镁铁伟晶岩组。在Bushveld Complex中，提出了一种新的对丘陵后超基性岩石不协调体的分类方案（另见Viljoen和Scoon，印刷中）。在这里提出的方案中，认识到了后积云的两个主要变种，即超镁铁质岩石，即非白垩纪镁质dunites和富铁的钛铁伟晶岩。

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    Scoon Roger N;

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  • 年度 1986
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  • 原文格式 PDF
  • 正文语种 English
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