摘要
对福建龙海牛头山新生代玄武岩中橄榄岩包体进行了傅利叶变换红外光谱（FTIR）分析，结果显示，二辉橄榄岩中的辉石包体含有结构水，均以OH的形式存在，结构水含量分别如下：单斜辉石为（151～845）×10^-6，斜方辉石为（40-710）×10^-6，全岩为（25-90）×10^-6．无论是辉石中的水含量还是全岩中的水含量，福建牛头山地区均高于华北克拉通的安徽女山、河北汉诺坝和苏北盆地，而与同是华北克拉通的河北阳原地区水含量相当．实验证明辉石是牛头山地区上地幔重要的水储库．初步推断福建牛头山经历了洋壳俯冲作用及底侵作用．
Abstract： The analysis of infrared spectrum of pyroxene in lherzolite from peridotite xenoliths in Niutoushan, Longhai, Fujian, shows that there is water hosted in the pyroxene which exists by OH hydroxyl. The water content of clinopyroxene is （151- 845） ×10^-6, of orthopyroxene is （40-710）×10^-6, and of the whole rock （25-90）×10^-6 respectively. The water contents, both of pyroxene and of the whole rock, are higher than those in Niihan, Hannuoba and Subei basin, but are almost the same as those in Yangyuan. It demonstrates that pyroxene is the important reservoir in the upper mantle in Niutoushan. It may have experienced oceanic crust subduction and underplating in investigation locality.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2011年第4期635-642,共8页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金项目(Nos.40372027
40872040)
关键词
橄榄岩
红外光谱
岩石学
peridotite xenoliths
infrared spectroscopy
petrology.
