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在苏鲁超高压变质带的芝麻坊石榴石橄榄岩的单斜辉石中发现了定向排列的富钾叶片状出溶体相. 综合研究表明, 这种出溶体与金云母的成分相当, 电子衍射也与金云母的指标参数相吻合, 其形状为直径1 mm左右、长度约5~30 mm的叶片. 透射电子显微镜研究显示, 这种与金云母成分相当的富钾出溶体的(001)面平行于单斜辉石的(100)面定向排列, 电子衍射分析该出溶体为1M多型. 高分辨晶格条纹像也显示出层状矿物在[001]方向所特有的堆垛层错的特征. 这种含有1M多型的富钾出溶体的单斜辉石来源可能达到240 km的地幔深处, 因此是超高压板片折返初期降压出溶的结果.
In the Sulu ultrahigh-pressure metamorphic belt sesame Square garnet peridotite clinopyroxene in the directional arrangement of potassium-rich leaf-like phase of the dissolution.Comprehensive studies have shown that the composition of this solution and phlogopite considerable, electron diffraction and The parameters of phlogopite are coincident with those of 1 mm in diameter and 5 ~ 30 mm in length.The transmission electron microscopy studies show that the (001) surface of this potassium-rich dissolution body, which corresponds to the phlogopite composition, is parallel to The (100) plane of the clinopyroxene is orientated and its solution is 1 M polymorphic by means of electron diffraction analysis. The high resolution lattice fringe pattern also shows the characteristic of stacking fault in the [001] direction. The source of clinopyroxene, which contains more than one M type of potassium-rich dissolved bodies, may reach a depth of 240 km in the mantle and is therefore the result of hypotonic dissolution during the early reentry of UHP flakes.