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从挪威西部片麻岩区的高级片麻岩中回收了3颗微粒金刚石。通过拉曼和红外光谱鉴定并测定这3颗微粒金刚石的特征,发现它们的结构中有H和N的替代杂质。通过对含金刚石岩石中的石榴石和石英矿物中的原生流体包裹体的研究,证明变质挥发分流体发生了演化,即从变质高峰期间还原的N_2-CO_2成分演化到退变质作用期间含N_2-CH_4±H_2O成分。地质、岩石和流体成分资料都表明微粒金刚石为变质成因;如果真是这样,那么微粒金刚石和片麻岩所记录的变质和流体条件可以用到其它高压区域变质带去研究微粒金刚石。
Three microparticle diamonds were recovered from the advanced gneiss in the gneiss area of western Norway. The three microparticulate diamonds were identified and characterized by Raman and infrared spectroscopy and found to have H and N substitutional impurities in their structure. By studying the primary fluid inclusions in garnet and quartz minerals from diamond-bearing rocks, it is proved that the metamorphic volatile fluids have evolved from the N_2-CO_2 components reduced during the metamorphic peak to those containing N_2-CH_4 during the retrogressive metamorphism ± H_2O composition. Geological, rock and fluid composition data indicate that microparticle diamond is a metamorphic origin; if so, the metamorphic and fluid conditions recorded by microparticle diamond and gneiss can be used to study microparticulate diamonds in other high-pressure zone metamorphic zones.