大别山张广河花岗岩成因探讨  

THE GENETIC ANALYSIS OF ZHANGGUANGHE GRANITES OF DABIE MOUNTAIN

作　　者：张元祥 

机构地区：[1]湖北省第三探矿工程大队,湖北黄冈438000

出　　处：《资源环境与工程》2004年第3期25-30,49,共7页Resources Environment & Engineering

摘　　要：由所谓的“均质混合岩”、“混合片麻岩”及“混合花岗岩”组成的张广河花岗岩体位于团风～麻城断裂带东侧 ,鄂、豫、皖三省交界的大别山腹地。其成因前人认为是大别群经强烈混合岩化作用的结果。笔者在 1:5万区调工作中依据地质产状、岩石矿物学、岩石化学、稀土及同位素成分等特征 ,确认为该岩体属岩浆侵位型花岗岩 ,属I型、钙碱性岩系。成岩物质主要来源于上地幔衍生物和下地壳岩石部分熔融物。Situated to the east of Tuanfeng-Macheng faults, the Zhangguanghe granites consist of isotropic migmatite, compound gneiss, and migmatitic granite. And they were considered to be from migmatization of the Dabie Group. The authors, however, pointed out that these granites might belong the granite of magmatic emplacement in Dabie Group and be type I calcic-alkaline series, based on their occurrence, petromineralogy, petrochemistry, REE and isotopic elements data collected through geological survey at 1:50,000. Its source materials might come from the partial molten complex of the upper mantle and lower crust.

关 键 词：大别山 成因探讨 混合岩化作用 1:5万区调 混合花岗岩 岩石矿物学 花岗岩体 地质产状 岩石化学 岩浆侵位 地壳岩石 成岩物质 断裂带 片麻岩 大别群 同位素 钙碱性 熔融物 衍生物 上地幔 岩系 

分 类 号：P611[天文地球—矿床学] P618.51[天文地球—地质学]