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溢流河片麻状花岗岩位于大别山南麓湖北省黄冈县溢流河附近,岩体出露约10平方公里。岩体在强烈区域变质作用和混合岩化作用基础上形成,变质相高达角闪岩相。根据岩体接触关系、地球化学特征及全岩Rb—Sr同位素数值,笔者认为属晚元古宙侵入体,成岩物质来源与下地壳部分熔融物质有关,岩性属钙碱性型。该岩体按成因类型可划归灰色片麻岩系列,与格陵兰戈德霍普地区的科库特花岗岩相似。
Spillover gneissic granite is located in the southern foot of Dabie Mountain Huanggang County, Hubei Province, near the overflow river, rock mass exposed about 10 square kilometers. The rock mass is formed on the basis of strong regional metamorphism and mixed rock formation, and metamorphic facies up to amphibolite facies. According to the contact relationship of rock mass, geochemical characteristics and Rb-Sr isotope value of whole rock, the author thinks that it belongs to Late Paleozoic intrusions, and the source of diagenetic material is related to the partial melting material of the lower crust. The lithology is a calc-alkaline type. The rock mass can be classified as a gray gneiss series by genetic type, similar to the Kokut granite in the Gold Hope area of Greenland.