长江中下游花岗岩类地质地球化学对比研究  

Geological and geochemical contrastive study on the granitoids from middle lower reach of the Yangtze River

作　　者：张德全[1] 徐洪林[1] 

机构地区：[1]中国地质科学院地质研究所,北京100037

出　　处：《华南地质与矿产》2002年第3期66-77,共12页Geology and Mineral Resources of South China

基　　金："八五"国家科技攻关专题研究项目 (85 -90 1-0 3 -0 9C)

摘　　要：对长江中下游安徽境内几个分区的花岗岩类进行了地质地球化学研究和对比。结果表明 ,江南隆起区花岗岩类的岩浆来源于中地壳下部和下地壳上部 ,沿江 (铜陵、安庆 )隆起 -凹陷过渡区和庐枞火山盆地凹陷区中性岩类的岩浆来源于下地壳中、下部 ,部分具壳 -幔混合特征。本区岩浆活动时代均为中生代 ,岩体的形成与印支期陆 -陆碰撞无直接联系 ,是印支期褶皱之后沿断裂侵位的产物。Geological and geochemical contrastive study of granitoids from Anhui Province shows that granitic magma for the Jiangnan(South Yangtze River) uplifted area might be derived from the middle lower crust and intermediate magma for the Tongling Anqing upwlifted downwarping transition region and the Luzong volcanic basin was derived from the middle lower part of the lower crust and partly shows crust mantle magma. Magmatism in this area happened during the Mesozoic and shows no direct relationships with the Indosinian continent continent collusion but related to post Indosinian rifting.

关 键 词：花岗岩类 地球化学 长江中下游 岩浆活动 岩石化学 中生代 岩相学 稀土元素 

分 类 号：P588.121[天文地球—岩石学] P59[天文地球—地质学]