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在中国大陆科学钻探主孔中部的榴辉岩样品B1021R642P40a、B1039R646P47a、B1046R648P4c和B1053R649P74k中,我们发现了磷灰石的磁黄铁矿出溶结构。磷灰石是该榴辉岩的主要副矿物,其自形程度较高,与石榴石共生。样品中几乎所有磷灰石均发育出溶结构,至少存在两组相互垂直的出溶棒。出溶棒形状规则,一样宽(<1μm),但长度变化大(5～50μm)。利用高分辨能谱仪测定表明,出溶棒主要由Fe和S两种元素组成。由于还不能准确地确定其Fe/S比值,初步确定其为磁黄铁矿(Fe_(1-x)S)。磷灰石由于含大量稀土元素和挥发性组分如OH、F、Cl和S,它的深循环因此可能对地球的水、硫以及其它挥发性组分的全球平衡具有重要影响。
In the eclogite samples B1021R642P40a, B1039R646P47a, B1046R648P4c and B1053R649P74k in the middle of the main hole in the scientific drillers in mainland China, we found the pyrrhotite pyrrhotite dissolution structure. Apatite is the main accessory mineral of this eclogite, which has a high self-shape and coexists with garnet. Almost all apatites in the sample develop an emanative structure, with at least two sets of rods that are perpendicular to each other. Dissolved bar shape regular, as wide (<1μm), but the length changes (5 ~ 50μm). The determination by high resolution spectrometer showed that the bar was mainly composed of Fe and S. Since the Fe / S ratio can not be accurately determined, it is initially determined to be pyrrhotite (Fe 1-x S). Due to its high content of rare earth elements and volatile components such as OH, F, Cl and S, apatite can have a profound effect on the global circulation of Earth’s water, sulfur and other volatile components.