宁远－道县地区玄武岩中二辉橄榄岩包体的初步研究  

Preliminary Study of Lherzolite Inclusion in Basalt in the Area of Ningyuan daoxian Counties

作　　者：吴友林[1] 林舸[1] 范蔚茗[1] 郭峰[1] 

机构地区：[1]中国科学院大地构造研究所

出　　处：《湖南地质》1995年第4期205-210,共6页Hunan Geology

基　　金：国家自然科学基金

摘　　要：宁远—道县地区玄武岩中的二辉橄榄岩包体属弱亏损型地幔包体；其温压平衡估算结果为９８０～１１１０℃、１０．２～２２．８ｋｐａ，包体来源深度为６０～７５ｋｍ。在到达地表以前，经历过较强的伸展剪切作用。Occurring in basalt in Ningyuan Daoxian counties Iherzolite inclusion comes from slightly de-pleted mantle. Temperatures and pressures estimated from equilibrium of co-existent minerals are 980°～1100°and 10.2～22.8 Kpa respectively. The depth from which lherzolite inclusion,are derived is about 60～75 km beneath the earth surface. Before emerging at the crust surface they have undergone strong extension- shearing process.

关 键 词：尖晶石 二辉橄榄岩 包体 玄武岩 

分 类 号：P588.145[天文地球—岩石学]