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High temperature reduced granulite-facies nature of garnetites in the Khabarny mafic-ultramafic Massif, Southern Urals: Evidence from fluid and mineral analyses
Journal of Petrology ( IF 3.5 ) Pub Date : 2020-06-15 , DOI: 10.1093/petrology/egaa066
Ronald J Bakker 1 , Evgenii Pushkarev 2 , Anna P Biryuzova 2
Affiliation  

High-grade metamorphic rocks underlying the intrusive layered dunite-pyroxenite-gabbronorite East-Khabarny Complex (EKC) are integrated in the complex Khabarny mafic-ultramafic Massif in the Sakmara Allochthon zone in the Southern Urals. These rocks are associated with high-temperature shear zones. Garnetites from the upper part of the metamorphic unit close to the contact with EKC gabbronorite were chemically and texturally analysed to estimate their formation conditions and fluid regime. Fluids provide crucial information of formation conditions and evolution of these garnetites during high-grade metamorphism, and are preserved in channel positions within Si6O1812- rings of cordierite, and in fluid inclusions in quartz and garnet. Minerals and fluid inclusions of the garnetites are studied with X-ray fluorescence spectrometry, electron microprobe analyses, Raman spectroscopy, and microthermometry.

中文翻译:

乌拉尔南部哈巴尼铁镁质-超镁铁质地块中石榴石的高温还原花岗石相性质:来自流体和矿物分析的证据

侵入性层状辉光岩-辉绿岩-辉长岩东部-哈巴尼复合体(EKC)之下的高级变质岩整合到了南部乌拉尔地区萨卡玛拉·阿洛通顿地区的复合哈巴尼铁镁质-超镁铁质地块中。这些岩石与高温剪切带有关。化学和组织分析了变质单元上部接近与EKC辉长岩接触的石榴石,以估算其形成条件和流体状态。流体提供了高级变质过程中这些石榴石的形成条件和演化的关键信息,并被保存在Si 6 O 18 12-堇青石环,以及石英和石榴石中的流体包裹体。用X射线荧光光谱法,电子微探针分析,拉曼光谱和微量热法研究了石榴石的矿物质和流体包裹体。
更新日期:2020-06-15
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