中文摘要：

中国西南天山昭苏县东德沟地幔楔环境的斜长角闪岩与蛇纹岩接触带中发现了异剥钙榴岩。按异剥钙榴岩化程度，可将研究的岩石分为三种类型：斜长角闪岩、异剥钙榴岩化斜长角闪岩和异剥钙榴岩，它们的矿物组合分别为：角闪石＋中长石＋石英＋榍石＋磷灰石4-次透辉石；角闪石＋钙长石＋透辉石＋斜黝帘石＋绿泥石±方解石；斜黝帘石＋钙铝榴石＋透辉石＋绿泥石＋方解石。异剥钙榴岩化岩石的矿物化学及主量元素特征反映出交代流体中富Ca、Al。与洋底变质环境和俯冲带中发生的异剥钙榴岩化作用相比，此处的异剥钙榴岩化岩石中的流体有限。质量平衡计算也表明斜长角闪岩在富Ca、Al流体的交代下形成异剥钙榴岩，这一过程中，早期有Mg元素加入，而晚期异剥钙榴岩形成时，Mg又大量流失。

英文摘要：

Rodingite was discovered in the contact zone between amphibolite and serpentinitized ultramafic rock in mantle wedge of the upper subduction zone, Dongdegou, southwestern Tianshan Mountains. According to the degree of rodingitization, three rock types can be classified： amphibolite, rodingitized amphibolite and rodingite; corresponding mineral assemblies are： amphibole ＋ andesine ＋ quartz ＋ titanite ＋ apatite _＋ salite; amphibole ＋ anorthite ＋ diopside ＋ clinozoisite ＋ chlorite _＋ calcite; clinozoisite ＋ grossularite ＋ diopside ＋ chlorite ＋ calcite. Mineral chemistry and their major element characteristics of the rodingitic rocks show that metasomatic fluid is abundant in Ca and A1 . Compared with the rodingitizition metasomatism occurred in ocean floor, the fluid contained in rodingitized rock here is much less intensive. Mass balance calculation also indicates that the convertion of amphibolite into rodingite is under the condition of enriched Ca and A1 fluid. Further more, Mg adds into the rock in the early stage, but obviously decreases in the late stage during rodingitization.