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本文研究了江苏孟中榴辉岩富铝单斜辉石中出溶石榴子石现象,建立了出溶母体辉石成分,提出了出溶石榴子石的矿物反应。结果表明,富铝单斜辉石首先出溶富镁石榴子石,并形成绿辉石。后二者正是榴辉岩的典型矿物组合,因此,母体辉石可能正代表了榴辉岩的母体。本文中变质成因榴辉宕中出溶现象的研究尚属少见。
In this paper, the phenomenon of the dissolution of garnet in the aluminum-rich clinopyroxene from the eclogite in Mengzhong, Jiangsu Province was studied. The composition of the pyroxene in the dissolved parent was established and the mineral reaction of the garnet released was proposed. The results show that the aluminum-rich clinopyroxene first dissolves Mg-rich garnet and forms omphacite. The latter two are the typical mineral assemblages of eclogites. Therefore, parent pyroxenes may be the precursors of eclogites. In this paper, the study of the phenomenon of metamorphosis in eclogite is rare.