释义 |
Bikou Group 基本例句 碧口群 There are Middle|Lower Devonian Sanhuokou Group and Middle|Upper ProterozoicBikou Groupin the ore district.矿区出露中下泥盆统三河口群和中上元古界碧口群。 Ding Zhenju, Liu Congqiang.Ancient hydrothermal system inBikou Group: Evidence from REE characteristics of iron-rich siliceous rocks;.Progress in Natural Science, 2000, 10 :427 - 434.;丁振举;刘丛强.;碧口群古热水系统发育的富铁硅岩稀元素地球化学证据; Petrochemical, microelement, rare-earth element data and the character of bimodal volcanic rocks show that theBikou Groupstrata were formed in an island arc-rift valley geote ctonic environment.岩石化学、微量元素和稀土元素等一系列图解,都一致判别为碧口群火山岩主要是钙碱系列,也有少量的拉斑系列,并具双峰式火山岩特征。因此,认为碧口群可能形成于岛弧裂谷环境。 Volcanic cycles of theBikou Groupand their tectonic implications碧口群火山旋回及其地质构造意义 NEW STIPULATION OF THE AGE OF BIKOU GROUP IN NORTHWEST SICHUAN川西北“碧口群”时代的新厘定 NeoproterozoicBikou Grouprift-related volcanic rocks新元古代碧口群裂谷火山岩 |