| 摘要：泰国北部清迈带洋岛型火山岩常被下石炭统及上二叠统浅水碳酸盐岩覆盖，泰语论文范文，泰语论文范文，主要岩石类型有夏威夷岩和钾质粗面玄武岩。以碱性系列为主，极个别亚碱性。主要化学成分以高TiO2、高P2O5和中K2O为特征；稀土元素强烈的轻稀土富集右倾斜型；微量元素模式呈K一Ti上隆富集型；多种成分投图落于洋岛玄武岩区及碱性玄武岩区，属于洋岛型火山岩。与中国云南德钦、耿马(昌宁一孟连带)洋岛玄武岩类似，它们是清迈带古特提斯洋壳的极重要组成部分。 Abstract：Chiang Mai in northern Thailand with ocean island volcanic rocks is often Carboniferous and Upper Permian shallow water carbonate rock cover. The main rock types are hawaiite and potassic trachybasalt. In alkaline series, extremely individual basic. Main chemical components with high TiO2, P2O5 and K2O characteristics; rare earth elements strong LREE enrichment right inclined type; trace element patterns is k - Ti uplift enrichment type; a variety of ingredients cast the figure fell to ocean island basalts and alkaline basalts, which belongs to the oceanic island volcanic rocks. With China in Deqin, Gengma (Changning Meng joint ocean island basalts similar, they are Chiang Mai with a very important part of the Paleo Tethys oceanic crust. 引言：0引言泰国北部清迈带相当于Barr and macdonald[1]所称的因他暖带;根据野外关系和岩石学特征认为该带为石炭—二叠纪大陆裂谷环境[2];由于该区有早泥盆世含放射虫硅质岩存在,该带又被认为该带具有洋盆沉积特点[3];从沉积环境及大地构造特征出发,则认为中国昌宁-孟连带与泰国 |
