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首页> 外文会议>PACRIM Congress >Cogenetic Formation of the Peralkaline Syenite and Oxide Ore-bearing Layered Gabbroic Intrusion of the Baima Igneous Complex, Emeishan Large Igneous Province, South-west China
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Cogenetic Formation of the Peralkaline Syenite and Oxide Ore-bearing Layered Gabbroic Intrusion of the Baima Igneous Complex, Emeishan Large Igneous Province, South-west China

机译：乳碱合作植物和氧化物矿石层涂层的丙哒型涂层侵入，中国西南部峨眉山大火省

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The formation of magmatic oxide ore deposits hosted in chemically-evolved layered gabbroic intrusions is attributed to a variety of penological processes, but there is little to no consensus on the general applicability of each model. Complicating the matter further is that many layered gabbroic intrusions are spatially and temporally associated with alkaline A-type granites, suggesting that there is a petrogenetic relationship between the two types of chemically different rocks. Our experimental results show that petrological modelling using a starting composition of high-Ti basalt from the Emeishan large igneous province can produce evolved silicic liquids that resemble the compositions of microgranular enclaves from the syenitic unit of the bimodal, oxide ore-bearing Baima igneous complex. The experimental results confirm that bimodal gabbro-granitoid complexes can form from a common parental magma and that early crystallisation of Ti-rich magnetite can explain the formation of the oxide ore deposits in the lower parts of the layered gabbroic intrusions. We conclude that crystallisation of a typical high-Ti basaltic parental magma can produce world-class giant magmatic oxide ore deposits and that the occurrence of some alkaline granites may be an indicator of their presence.
机译：在化学演进的层状助致侵袭中托管的Magmatic氧化物矿床的形成归因于各种语言过程，但对每个模型的一般适用性没有达成共识。此外，这种物质复杂化的是，许多层状的抛光侵入性在空间和时间上与碱性A型花岗岩有关，表明两种类型的化学不同的岩石之间存在细胞学关系。我们的实验结果表明，使用来自峨眉山大的火炬省的高Ti玄武岩的起始组合物的岩浆型建模可以生产出来的硅液体，类似于来自双峰，氧化物矿石Baima的半透明单位的微血管内切割的组成。实验结果证实，双峰Gabbro - 花岗岩复合物可以从常见的父母岩浆中形成，并且Ti的富含磁铁矿的早期结晶可以解释层在层状的涂层侵入性侵入的下部中的氧化物矿床的形成。我们得出结论，典型的高Ti玄武岩麦克猫晶体的结晶可以生产世界级巨型岩石氧化物矿床，并且一些碱性花岗岩的发生可能是其存在的指标。

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