Mposkos Evripidis, Perraki Maria, Palikari Sarra
National Technical University of Athens, School of Mining & Metallurgical Engineering, Division of Geosciences, 9 Heroon Politechniou St., GR-15773 Zografou, Greece.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Aug;73(3):477-83. doi: 10.1016/j.saa.2008.12.035. Epub 2008 Dec 30.
Single and multiphase inclusions in garnet porphyroblasts from the diamond-bearing pelitic gneisses were studied by means of combined Raman Spectroscopy and Electron Scanning Microscopy (SEM/EDX). They are either randomly distributed or with preferred orientation within the garnet host and their dimensions vary from less than 5 up to 60 microm. In the single-phase inclusions quartz, rutile, kyanite and graphite dominate. Biotite, zircon, apatite, monazite and allanite are also common. Two types of multiphase inclusions were recognized, hydrous silicate (Type I) and silicate-carbonate (Type II) ones. The carbon-bearing multiphase inclusions predominantly consist of Mg-siderite+graphite+CO(2)+muscovite+quartz formed by a high density carboniferous fluid rich in Fe, Mg, Si and less Ca, Mn, Al and K trapped in the growing garnet in a prograde stage of metamorphism at high-pressure (HP) conditions. The carbon-free multiphase inclusions predominantly consist of biotite+quartz+rutile+/-kyanite+muscovite formed through decompression-dehydration/melting reactions of pre-existing phengite. Single and multiphase inclusions are characterized by polygonal to negative crystal shape formed by dissolution-reprecipitation mechanism between the garnet host and the inclusions during the long lasting cooling period (>100 Ma) of the Kimi Complex.
利用拉曼光谱和电子扫描显微镜（SEM/EDX）相结合的方法，对含金刚石泥质片麻岩中石榴石斑晶内的单相和多相包裹体进行了研究。它们在石榴石主体内要么随机分布，要么具有择优取向，其尺寸从小于5微米到60微米不等。在单相包裹体中，石英、金红石、蓝晶石和石墨占主导。黑云母、锆石、磷灰石、独居石和褐帘石也很常见。识别出了两种类型的多相包裹体，含水硅酸盐（I型）和硅酸盐 - 碳酸盐（II型）包裹体。含碳多相包裹体主要由镁菱铁矿 + 石墨 + CO₂ + 白云母 + 石英组成，它们是由富含铁、镁、硅且钙、锰、铝和钾含量较低的高密度含碳流体在高压（HP）条件下变质作用的前进阶段被困在生长的石榴石中形成的。无碳多相包裹体主要由黑云母 + 石英 + 金红石 + / - 蓝晶石 + 白云母组成，是由先前多硅白云母的减压 - 脱水/熔融反应形成的。单相和多相包裹体的特征是在基米杂岩体长达100 Ma以上的冷却期内，石榴石主体与包裹体之间通过溶解 - 再沉淀机制形成的多边形到负晶形。
