摘要
可可西里火山岩岩石序列为粗安岩、粗面岩、玻基安山岩及流纹岩,尤以安山岩最有代表性。渐新世SiO2、CaO高于中新世。稀土元素分配曲线揭示渐新世和中新世为同源岩浆。同位素研究结果显示出混然富集地幔源区特点。
Kekexili volcanic rock series are composed of trachyandesite, trachite, basis andesite and li- parite, especially the characteristic andesite. SiO2, CaO of Oligocene are higher than than those of Miocene. The REE distribution curve shows Oligoeene and Miocene magmas have a same origin. The isotope analysis shows the characteristics of contamination and enrichment mantle derivation.
出处
《云南地质》
2013年第4期476-479,共4页
Yunnan Geology
关键词
新生代火山岩
安山岩最典型
同源岩浆
富集地幔源区
青海可可西里
Cenozoic Volcanic Rock
Widest Andesite
Synmagmatic Derivation
Enrichment Mantle Der- ivation
Kekexili, Qinghai
