摘要
吉林省金城洞地区位于华北地台北缘东端 ,区内元古宙花岗岩发育 ,其主要岩石类型为 :早元古宙花岗闪长岩、二长花岗岩、斜长花岗岩 ,中元古宙花岗闪长岩。这些花岗岩均普遍富含Na2 O、Al2 O3,为钙碱性系列岩石 ,各种化学参数表现出I型花岗岩的特点。其稀土元素模式为轻稀土富集的右倾曲线 ,基本无铕异常。
Proterozoic granites develop in jinchengdong region, Jilin Province, locate in the eastern part of the northern margin of North China platform. The major granites are mainly early Proterozoic p granodiorite, adamellite, lagiogranite; mid-Proterozoic adamellite. The granitoid rocks are commonly rich in Na 2O, Al 2O 3, and evolved to calc-alkalic rock series. Different chemical parameters of granite show the characteristics of I-type granite. Their REE model is characterized by enrichment in light REE and no Eu anomaly. These geological and geochmical features reflect tectonic environmental cycle.
出处
《地质与勘探》
CAS
CSCD
北大核心
2001年第1期79-81,共3页
Geology and Exploration
基金
原地质矿产部"八五"科技攻关项目(85-01-002-02-01)
中国科学院"九五"重大黄金项目(KZ951-404-02)资助
