摘要
在大岔大坂蛇绿岩中发现了一套属于玻安岩系（ＢｏｎｉｎｉｔｅＳｅｒｉｅｓ）的岩石。岩石化学成分与ＭＯＲＢ相比，以富Ｓｉ、Ｍｇ、挥发份和贫Ｔｉ、Ｚｒ、Ｙ及ＨＲＥＥ为特征，总ＲＥＥ丰度低，ＬＲＥＥ亏损。推测大岔大坂蛇绿岩是岛弧类型的，产于弧前环境。
The rocks of boninite series rocks have been recognized during the study of Dachadabanophiolite(DDO). These rocks are charactered by relatively high SiO2, MgO and volatile contents, and lowconcentration of Ti, Zr, Y and HREE. They have low ZREE abundance and are depleted in LREE. It isgenerally received that boninites are formed in fore-arc basin settings. So, it can be assumed that DDO belongsto the island-arc type and are formed in fore-arc basin settings.
出处
《岩石学报》
SCIE
CAS
CSCD
北大核心
1995年第S1期147-153,共7页
Acta Petrologica Sinica
基金
国家自然科学基金
